/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=BIGGEST --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/array-examples/standard_copyInitSum2_ground-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-12 09:55:02,535 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-12 09:55:02,539 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-12 09:55:02,580 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-12 09:55:02,580 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-12 09:55:02,581 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-12 09:55:02,582 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-12 09:55:02,584 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-12 09:55:02,586 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-12 09:55:02,587 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-12 09:55:02,587 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-12 09:55:02,588 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-12 09:55:02,589 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-12 09:55:02,590 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-12 09:55:02,591 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-12 09:55:02,592 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-12 09:55:02,592 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-12 09:55:02,593 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-12 09:55:02,595 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-12 09:55:02,596 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-12 09:55:02,598 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-12 09:55:02,599 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-12 09:55:02,600 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-12 09:55:02,600 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-12 09:55:02,603 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-12 09:55:02,603 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-12 09:55:02,603 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-12 09:55:02,604 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-12 09:55:02,605 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-12 09:55:02,606 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-12 09:55:02,606 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-12 09:55:02,607 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-12 09:55:02,607 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-12 09:55:02,608 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-12 09:55:02,609 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-12 09:55:02,609 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-12 09:55:02,610 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-12 09:55:02,610 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-12 09:55:02,610 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-12 09:55:02,611 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-12 09:55:02,612 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-12 09:55:02,612 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 [2020-10-12 09:55:02,634 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-12 09:55:02,635 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-12 09:55:02,636 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-12 09:55:02,636 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-12 09:55:02,636 INFO L138 SettingsManager]: * Use SBE=true [2020-10-12 09:55:02,637 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-12 09:55:02,637 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-12 09:55:02,637 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-12 09:55:02,637 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-12 09:55:02,637 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-12 09:55:02,638 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-12 09:55:02,638 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-12 09:55:02,638 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-12 09:55:02,638 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-12 09:55:02,638 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-12 09:55:02,639 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-12 09:55:02,639 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-12 09:55:02,639 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-12 09:55:02,639 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-12 09:55:02,640 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-12 09:55:02,640 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-12 09:55:02,640 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-12 09:55:02,640 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-12 09:55:02,640 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-12 09:55:02,641 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-12 09:55:02,641 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-12 09:55:02,641 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-12 09:55:02,641 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-12 09:55:02,641 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-12 09:55:02,642 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=BIGGEST;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=BIGGEST;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=BIGGEST;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=BIGGEST;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=BIGGEST;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=BIGGEST;log-additional-information=true;unknown-allowed=true; [2020-10-12 09:55:02,954 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-12 09:55:02,966 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-12 09:55:02,969 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-12 09:55:02,971 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-12 09:55:02,971 INFO L275 PluginConnector]: CDTParser initialized [2020-10-12 09:55:02,972 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_copyInitSum2_ground-2.i [2020-10-12 09:55:03,038 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6c2baf3b4/a5c2d3dca85f4cd4a910b6e83ca50c31/FLAGe76433add [2020-10-12 09:55:03,443 INFO L306 CDTParser]: Found 1 translation units. [2020-10-12 09:55:03,444 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-examples/standard_copyInitSum2_ground-2.i [2020-10-12 09:55:03,450 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6c2baf3b4/a5c2d3dca85f4cd4a910b6e83ca50c31/FLAGe76433add [2020-10-12 09:55:03,825 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6c2baf3b4/a5c2d3dca85f4cd4a910b6e83ca50c31 [2020-10-12 09:55:03,835 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-12 09:55:03,838 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-12 09:55:03,839 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-12 09:55:03,839 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-12 09:55:03,843 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-12 09:55:03,844 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 09:55:03" (1/1) ... [2020-10-12 09:55:03,847 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@d5d5e76 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:55:03, skipping insertion in model container [2020-10-12 09:55:03,847 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 09:55:03" (1/1) ... [2020-10-12 09:55:03,855 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-12 09:55:03,871 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-12 09:55:04,073 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 09:55:04,077 INFO L203 MainTranslator]: Completed pre-run [2020-10-12 09:55:04,098 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 09:55:04,114 INFO L208 MainTranslator]: Completed translation [2020-10-12 09:55:04,115 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:55:04 WrapperNode [2020-10-12 09:55:04,115 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-12 09:55:04,116 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-12 09:55:04,116 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-12 09:55:04,116 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-12 09:55:04,199 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:55:04" (1/1) ... [2020-10-12 09:55:04,200 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:55:04" (1/1) ... [2020-10-12 09:55:04,209 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:55:04" (1/1) ... [2020-10-12 09:55:04,210 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:55:04" (1/1) ... [2020-10-12 09:55:04,217 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:55:04" (1/1) ... [2020-10-12 09:55:04,223 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:55:04" (1/1) ... [2020-10-12 09:55:04,225 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:55:04" (1/1) ... [2020-10-12 09:55:04,227 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-12 09:55:04,227 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-12 09:55:04,227 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-12 09:55:04,227 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-12 09:55:04,228 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:55:04" (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 [2020-10-12 09:55:04,281 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-12 09:55:04,281 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-12 09:55:04,281 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-12 09:55:04,282 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-12 09:55:04,282 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-12 09:55:04,282 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-12 09:55:04,282 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-12 09:55:04,282 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-12 09:55:04,282 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-12 09:55:04,283 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-12 09:55:04,283 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-12 09:55:04,283 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-12 09:55:04,283 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-12 09:55:04,522 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-12 09:55:04,523 INFO L295 CfgBuilder]: Removed 4 assume(true) statements. [2020-10-12 09:55:04,527 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 09:55:04 BoogieIcfgContainer [2020-10-12 09:55:04,527 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-12 09:55:04,529 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-12 09:55:04,529 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-12 09:55:04,532 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-12 09:55:04,533 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.10 09:55:03" (1/3) ... [2020-10-12 09:55:04,533 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3baa00f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 09:55:04, skipping insertion in model container [2020-10-12 09:55:04,534 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:55:04" (2/3) ... [2020-10-12 09:55:04,534 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3baa00f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 09:55:04, skipping insertion in model container [2020-10-12 09:55:04,534 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 09:55:04" (3/3) ... [2020-10-12 09:55:04,536 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_copyInitSum2_ground-2.i [2020-10-12 09:55:04,549 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-12 09:55:04,558 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-12 09:55:04,583 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-12 09:55:04,642 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-12 09:55:04,642 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-12 09:55:04,643 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-12 09:55:04,643 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-12 09:55:04,646 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-12 09:55:04,646 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-12 09:55:04,646 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-12 09:55:04,647 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-12 09:55:04,671 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2020-10-12 09:55:04,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-12 09:55:04,678 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:55:04,679 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:55:04,679 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:55:04,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:55:04,685 INFO L82 PathProgramCache]: Analyzing trace with hash 1001985310, now seen corresponding path program 1 times [2020-10-12 09:55:04,693 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:55:04,693 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [33536097] [2020-10-12 09:55:04,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:55:04,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:55:04,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:04,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:04,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:05,171 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:55:05,171 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-12 09:55:05,172 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 09:55:05,172 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 376 [2020-10-12 09:55:05,175 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:55:05,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 09:55:05,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-12 09:55:05,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 09:55:05,176 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-12 09:55:05,243 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:55:05,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:55:05,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:05,252 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:55:05,252 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:55:05,252 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:55:05,253 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 09:55:05,253 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:55:05,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:55:05,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:55:05,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:55:05,255 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:55:05,263 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:55:05,264 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [33536097] [2020-10-12 09:55:05,266 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 09:55:05,266 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-12 09:55:05,267 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078138296] [2020-10-12 09:55:05,272 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-12 09:55:05,273 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:55:05,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-12 09:55:05,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-12 09:55:05,291 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 4 states. [2020-10-12 09:55:05,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:55:05,420 INFO L93 Difference]: Finished difference Result 56 states and 77 transitions. [2020-10-12 09:55:05,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-12 09:55:05,422 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2020-10-12 09:55:05,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:55:05,431 INFO L225 Difference]: With dead ends: 56 [2020-10-12 09:55:05,431 INFO L226 Difference]: Without dead ends: 29 [2020-10-12 09:55:05,435 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 [2020-10-12 09:55:05,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-12 09:55:05,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2020-10-12 09:55:05,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-12 09:55:05,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2020-10-12 09:55:05,478 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 17 [2020-10-12 09:55:05,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:55:05,479 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2020-10-12 09:55:05,479 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-12 09:55:05,479 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2020-10-12 09:55:05,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-12 09:55:05,480 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:55:05,480 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] [2020-10-12 09:55:05,481 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-12 09:55:05,481 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:55:05,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:55:05,482 INFO L82 PathProgramCache]: Analyzing trace with hash -1150570790, now seen corresponding path program 1 times [2020-10-12 09:55:05,482 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:55:05,482 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1567897988] [2020-10-12 09:55:05,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:55:05,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:55:05,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:05,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:05,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:05,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:06,454 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:55:06,455 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-12 09:55:06,455 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 09:55:06,455 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 957 [2020-10-12 09:55:06,456 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:55:06,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-12 09:55:06,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:55:06,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-12 09:55:06,457 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:55:06,896 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:55:06,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:55:06,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:06,902 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:55:06,902 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:55:06,902 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:55:06,903 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 09:55:06,903 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:55:06,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:55:06,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:55:06,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:55:06,904 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:55:06,910 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-12 09:55:06,911 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1567897988] [2020-10-12 09:55:06,911 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:55:06,911 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-12 09:55:06,911 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201923264] [2020-10-12 09:55:06,913 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-12 09:55:06,913 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:55:06,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-12 09:55:06,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2020-10-12 09:55:06,914 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand 11 states. [2020-10-12 09:55:07,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:55:07,274 INFO L93 Difference]: Finished difference Result 39 states and 42 transitions. [2020-10-12 09:55:07,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-12 09:55:07,275 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 22 [2020-10-12 09:55:07,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:55:07,276 INFO L225 Difference]: With dead ends: 39 [2020-10-12 09:55:07,276 INFO L226 Difference]: Without dead ends: 37 [2020-10-12 09:55:07,278 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2020-10-12 09:55:07,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-12 09:55:07,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 33. [2020-10-12 09:55:07,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-12 09:55:07,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2020-10-12 09:55:07,288 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 22 [2020-10-12 09:55:07,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:55:07,288 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2020-10-12 09:55:07,288 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-12 09:55:07,289 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2020-10-12 09:55:07,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-12 09:55:07,290 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:55:07,290 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-12 09:55:07,291 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-12 09:55:07,291 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:55:07,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:55:07,291 INFO L82 PathProgramCache]: Analyzing trace with hash -4490095, now seen corresponding path program 1 times [2020-10-12 09:55:07,292 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:55:07,292 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [147894901] [2020-10-12 09:55:07,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:55:07,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:55:07,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:07,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:07,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:07,755 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:55:07,756 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-12 09:55:07,756 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 09:55:07,756 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 454 [2020-10-12 09:55:07,756 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:55:07,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-12 09:55:07,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-12 09:55:07,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-12 09:55:07,758 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:55:07,789 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:55:07,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:55:07,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:07,794 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:55:07,798 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:55:07,799 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:55:07,799 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 09:55:07,799 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:55:07,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:55:07,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:55:07,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:55:07,800 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:55:07,802 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-10-12 09:55:07,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:55:07,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:07,805 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:55:07,805 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:55:07,805 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:55:07,806 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:55:07,806 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:55:07,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:55:07,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 09:55:07,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:55:07,807 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:55:07,811 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-12 09:55:07,812 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [147894901] [2020-10-12 09:55:07,812 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:55:07,812 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-12 09:55:07,812 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314374857] [2020-10-12 09:55:07,813 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-12 09:55:07,814 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:55:07,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-12 09:55:07,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-12 09:55:07,815 INFO L87 Difference]: Start difference. First operand 33 states and 36 transitions. Second operand 5 states. [2020-10-12 09:55:07,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:55:07,923 INFO L93 Difference]: Finished difference Result 65 states and 73 transitions. [2020-10-12 09:55:07,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-12 09:55:07,924 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 30 [2020-10-12 09:55:07,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:55:07,935 INFO L225 Difference]: With dead ends: 65 [2020-10-12 09:55:07,935 INFO L226 Difference]: Without dead ends: 40 [2020-10-12 09:55:07,936 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-12 09:55:07,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-12 09:55:07,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 38. [2020-10-12 09:55:07,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-12 09:55:07,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 41 transitions. [2020-10-12 09:55:07,950 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 41 transitions. Word has length 30 [2020-10-12 09:55:07,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:55:07,951 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 41 transitions. [2020-10-12 09:55:07,951 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-12 09:55:07,951 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 41 transitions. [2020-10-12 09:55:07,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-12 09:55:07,953 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:55:07,953 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:55:07,954 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-12 09:55:07,954 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:55:07,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:55:07,954 INFO L82 PathProgramCache]: Analyzing trace with hash 1087753673, now seen corresponding path program 2 times [2020-10-12 09:55:07,955 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:55:07,955 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1261100592] [2020-10-12 09:55:07,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:55:07,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:55:07,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:07,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:08,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:09,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:10,705 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:55:10,705 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-12 09:55:10,706 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 09:55:10,706 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2733 [2020-10-12 09:55:10,706 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:55:10,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-12 09:55:10,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:55:10,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-12 09:55:10,707 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:55:11,560 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:55:11,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:55:11,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:11,566 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:55:11,567 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:55:11,567 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:55:11,568 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 09:55:11,568 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:55:11,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:55:11,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:55:11,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:55:11,578 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 9 [2020-10-12 09:55:11,583 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-12 09:55:11,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:55:11,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:11,594 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:55:11,594 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:55:11,595 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:55:11,595 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-12 09:55:11,595 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:55:11,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 09:55:11,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:55:11,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 09:55:11,598 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-12 09:55:11,610 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:55:11,611 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1261100592] [2020-10-12 09:55:11,612 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:55:11,613 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-12 09:55:11,613 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522963509] [2020-10-12 09:55:11,614 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-12 09:55:11,614 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:55:11,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-12 09:55:11,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=268, Unknown=0, NotChecked=0, Total=306 [2020-10-12 09:55:11,617 INFO L87 Difference]: Start difference. First operand 38 states and 41 transitions. Second operand 18 states. [2020-10-12 09:55:12,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:55:12,725 INFO L93 Difference]: Finished difference Result 60 states and 66 transitions. [2020-10-12 09:55:12,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-12 09:55:12,727 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 35 [2020-10-12 09:55:12,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:55:12,731 INFO L225 Difference]: With dead ends: 60 [2020-10-12 09:55:12,732 INFO L226 Difference]: Without dead ends: 58 [2020-10-12 09:55:12,736 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=112, Invalid=758, Unknown=0, NotChecked=0, Total=870 [2020-10-12 09:55:12,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-12 09:55:12,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 51. [2020-10-12 09:55:12,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-12 09:55:12,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 56 transitions. [2020-10-12 09:55:12,769 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 56 transitions. Word has length 35 [2020-10-12 09:55:12,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:55:12,770 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 56 transitions. [2020-10-12 09:55:12,770 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-12 09:55:12,771 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 56 transitions. [2020-10-12 09:55:12,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-12 09:55:12,775 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:55:12,776 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 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] [2020-10-12 09:55:12,776 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-12 09:55:12,776 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:55:12,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:55:12,777 INFO L82 PathProgramCache]: Analyzing trace with hash -747389881, now seen corresponding path program 3 times [2020-10-12 09:55:12,777 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:55:12,778 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1001042615] [2020-10-12 09:55:12,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:55:12,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:55:12,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:12,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:12,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:14,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:15,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:16,169 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:55:16,169 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-12 09:55:16,169 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 09:55:16,170 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3380 [2020-10-12 09:55:16,170 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:55:16,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-12 09:55:16,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:55:16,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-12 09:55:16,171 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:55:17,264 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:55:17,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:55:17,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:17,273 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:55:17,273 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:55:17,274 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:55:17,274 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-12 09:55:17,275 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:55:17,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:55:17,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:55:17,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:55:17,276 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:55:17,278 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-10-12 09:55:17,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:55:17,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:17,287 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:55:17,288 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:55:17,288 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:55:17,288 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-12 09:55:17,289 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:55:17,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 09:55:17,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:55:17,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 09:55:17,289 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:55:17,299 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:55:17,300 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1001042615] [2020-10-12 09:55:17,300 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:55:17,300 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-12 09:55:17,300 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492926111] [2020-10-12 09:55:17,302 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-12 09:55:17,302 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:55:17,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-12 09:55:17,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2020-10-12 09:55:17,303 INFO L87 Difference]: Start difference. First operand 51 states and 56 transitions. Second operand 21 states. [2020-10-12 09:55:19,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:55:19,047 INFO L93 Difference]: Finished difference Result 115 states and 129 transitions. [2020-10-12 09:55:19,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-12 09:55:19,048 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 37 [2020-10-12 09:55:19,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:55:19,050 INFO L225 Difference]: With dead ends: 115 [2020-10-12 09:55:19,050 INFO L226 Difference]: Without dead ends: 79 [2020-10-12 09:55:19,051 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=226, Invalid=1256, Unknown=0, NotChecked=0, Total=1482 [2020-10-12 09:55:19,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-12 09:55:19,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 55. [2020-10-12 09:55:19,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-12 09:55:19,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 61 transitions. [2020-10-12 09:55:19,063 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 61 transitions. Word has length 37 [2020-10-12 09:55:19,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:55:19,064 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 61 transitions. [2020-10-12 09:55:19,064 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-12 09:55:19,064 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 61 transitions. [2020-10-12 09:55:19,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-12 09:55:19,065 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:55:19,065 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:55:19,065 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-12 09:55:19,066 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:55:19,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:55:19,066 INFO L82 PathProgramCache]: Analyzing trace with hash -1554058493, now seen corresponding path program 4 times [2020-10-12 09:55:19,066 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:55:19,067 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [419003417] [2020-10-12 09:55:19,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:55:19,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:55:19,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:19,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:19,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:20,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:21,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:22,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:24,080 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:55:24,080 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-12 09:55:24,081 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 09:55:24,081 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-12 09:55:24,081 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:55:24,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-12 09:55:24,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:55:24,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-12 09:55:24,082 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:55:24,830 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:55:24,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:55:24,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:24,834 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:55:24,834 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:55:24,835 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:55:24,835 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:55:24,835 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:55:24,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:55:24,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:55:24,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:55:24,836 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:55:24,837 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-12 09:55:24,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:55:24,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:24,843 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:55:24,843 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:55:24,843 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:55:24,843 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 09:55:24,844 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:55:24,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 09:55:24,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:55:24,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 09:55:24,845 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:55:24,855 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:55:24,855 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [419003417] [2020-10-12 09:55:24,855 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:55:24,856 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-12 09:55:24,856 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222247175] [2020-10-12 09:55:24,856 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-12 09:55:24,857 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:55:24,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-12 09:55:24,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2020-10-12 09:55:24,857 INFO L87 Difference]: Start difference. First operand 55 states and 61 transitions. Second operand 21 states. [2020-10-12 09:55:26,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:55:26,167 INFO L93 Difference]: Finished difference Result 122 states and 139 transitions. [2020-10-12 09:55:26,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-12 09:55:26,169 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 41 [2020-10-12 09:55:26,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:55:26,171 INFO L225 Difference]: With dead ends: 122 [2020-10-12 09:55:26,171 INFO L226 Difference]: Without dead ends: 84 [2020-10-12 09:55:26,172 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 6 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=233, Invalid=1099, Unknown=0, NotChecked=0, Total=1332 [2020-10-12 09:55:26,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-12 09:55:26,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 59. [2020-10-12 09:55:26,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-12 09:55:26,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 66 transitions. [2020-10-12 09:55:26,185 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 66 transitions. Word has length 41 [2020-10-12 09:55:26,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:55:26,186 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 66 transitions. [2020-10-12 09:55:26,186 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-12 09:55:26,186 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 66 transitions. [2020-10-12 09:55:26,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-12 09:55:26,187 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:55:26,187 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:55:26,187 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-12 09:55:26,188 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:55:26,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:55:26,188 INFO L82 PathProgramCache]: Analyzing trace with hash 549280703, now seen corresponding path program 5 times [2020-10-12 09:55:26,188 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:55:26,188 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1911871974] [2020-10-12 09:55:26,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:55:26,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:55:26,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:26,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:26,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:28,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:30,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:31,213 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:55:31,213 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-12 09:55:31,213 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 09:55:31,214 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-10-12 09:55:31,214 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:55:31,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-12 09:55:31,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:55:31,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-12 09:55:31,215 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:55:32,281 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:55:32,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:55:32,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:32,286 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:55:32,286 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:55:32,287 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:55:32,287 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 09:55:32,287 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:55:32,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:55:32,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:55:32,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:55:32,288 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:55:32,289 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-10-12 09:55:32,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:55:32,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:32,296 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:55:32,296 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:55:32,296 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:55:32,297 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 09:55:32,297 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:55:32,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 09:55:32,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:55:32,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 09:55:32,298 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:55:32,313 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 2 proven. 44 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-12 09:55:32,314 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1911871974] [2020-10-12 09:55:32,314 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:55:32,314 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-12 09:55:32,315 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873861465] [2020-10-12 09:55:32,315 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-12 09:55:32,316 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:55:32,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-12 09:55:32,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=379, Unknown=0, NotChecked=0, Total=462 [2020-10-12 09:55:32,317 INFO L87 Difference]: Start difference. First operand 59 states and 66 transitions. Second operand 22 states. [2020-10-12 09:55:33,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:55:33,683 INFO L93 Difference]: Finished difference Result 129 states and 149 transitions. [2020-10-12 09:55:33,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-12 09:55:33,686 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 45 [2020-10-12 09:55:33,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:55:33,687 INFO L225 Difference]: With dead ends: 129 [2020-10-12 09:55:33,687 INFO L226 Difference]: Without dead ends: 89 [2020-10-12 09:55:33,690 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 6 SyntacticMatches, 5 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 339 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=288, Invalid=1272, Unknown=0, NotChecked=0, Total=1560 [2020-10-12 09:55:33,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-12 09:55:33,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 63. [2020-10-12 09:55:33,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-12 09:55:33,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 71 transitions. [2020-10-12 09:55:33,703 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 71 transitions. Word has length 45 [2020-10-12 09:55:33,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:55:33,703 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 71 transitions. [2020-10-12 09:55:33,703 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-12 09:55:33,704 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 71 transitions. [2020-10-12 09:55:33,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-12 09:55:33,707 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:55:33,707 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:55:33,707 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-12 09:55:33,708 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:55:33,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:55:33,708 INFO L82 PathProgramCache]: Analyzing trace with hash -524675014, now seen corresponding path program 6 times [2020-10-12 09:55:33,708 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:55:33,708 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1953570566] [2020-10-12 09:55:33,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:55:33,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:55:33,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:33,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:33,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:33,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:35,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:38,717 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:55:38,717 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-12 09:55:38,717 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 09:55:38,717 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-12 09:55:38,718 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:55:38,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-12 09:55:38,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:55:38,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-12 09:55:38,718 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:55:39,252 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:55:39,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:55:39,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:39,256 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:55:39,256 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:55:39,257 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:55:39,257 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 09:55:39,257 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:55:39,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:55:39,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:55:39,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:55:39,257 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:55:39,258 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-12 09:55:39,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:55:39,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:39,262 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:55:39,262 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:55:39,262 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:55:39,262 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 09:55:39,262 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:55:39,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 09:55:39,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:55:39,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 09:55:39,263 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:55:39,264 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-10-12 09:55:39,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:55:39,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:39,268 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:55:39,269 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:55:39,269 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:55:39,269 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 09:55:39,269 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:55:39,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 09:55:39,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-12 09:55:39,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 09:55:39,270 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:55:39,314 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 13 proven. 28 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-12 09:55:39,315 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1953570566] [2020-10-12 09:55:39,315 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:55:39,315 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-12 09:55:39,315 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548674115] [2020-10-12 09:55:39,315 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-12 09:55:39,316 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:55:39,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-12 09:55:39,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2020-10-12 09:55:39,316 INFO L87 Difference]: Start difference. First operand 63 states and 71 transitions. Second operand 18 states. [2020-10-12 09:55:39,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:55:39,838 INFO L93 Difference]: Finished difference Result 86 states and 98 transitions. [2020-10-12 09:55:39,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-12 09:55:39,839 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 49 [2020-10-12 09:55:39,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:55:39,841 INFO L225 Difference]: With dead ends: 86 [2020-10-12 09:55:39,841 INFO L226 Difference]: Without dead ends: 69 [2020-10-12 09:55:39,842 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 9 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=149, Invalid=553, Unknown=0, NotChecked=0, Total=702 [2020-10-12 09:55:39,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-12 09:55:39,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 63. [2020-10-12 09:55:39,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-12 09:55:39,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 69 transitions. [2020-10-12 09:55:39,855 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 69 transitions. Word has length 49 [2020-10-12 09:55:39,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:55:39,855 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 69 transitions. [2020-10-12 09:55:39,856 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-12 09:55:39,856 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 69 transitions. [2020-10-12 09:55:39,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-12 09:55:39,857 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:55:39,857 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:55:39,857 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-12 09:55:39,857 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:55:39,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:55:39,858 INFO L82 PathProgramCache]: Analyzing trace with hash -987105669, now seen corresponding path program 7 times [2020-10-12 09:55:39,858 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:55:39,858 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [848605725] [2020-10-12 09:55:39,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:55:39,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:55:39,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:39,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:39,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:42,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:42,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:43,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:44,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:45,032 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:55:45,033 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-12 09:55:45,033 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-12 09:55:45,033 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5168 [2020-10-12 09:55:45,033 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:55:45,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-12 09:55:45,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:55:45,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-12 09:55:45,034 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:55:45,944 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:55:45,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:55:45,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:45,947 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:55:45,947 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:55:45,947 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:55:45,948 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:55:45,948 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:55:45,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:55:45,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:55:45,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:55:45,949 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:55:45,950 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-10-12 09:55:45,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:55:45,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:45,959 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:55:45,959 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:55:45,959 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:55:45,959 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 09:55:45,960 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:55:45,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 09:55:45,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:55:45,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 09:55:45,961 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:55:45,975 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 2 proven. 60 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-12 09:55:45,981 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [848605725] [2020-10-12 09:55:45,982 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:55:45,982 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-12 09:55:45,982 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744191061] [2020-10-12 09:55:45,983 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-12 09:55:45,984 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:55:45,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-12 09:55:45,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=450, Unknown=0, NotChecked=0, Total=552 [2020-10-12 09:55:45,985 INFO L87 Difference]: Start difference. First operand 63 states and 69 transitions. Second operand 24 states. [2020-10-12 09:55:47,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:55:47,431 INFO L93 Difference]: Finished difference Result 93 states and 105 transitions. [2020-10-12 09:55:47,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-12 09:55:47,432 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 49 [2020-10-12 09:55:47,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:55:47,433 INFO L225 Difference]: With dead ends: 93 [2020-10-12 09:55:47,434 INFO L226 Difference]: Without dead ends: 91 [2020-10-12 09:55:47,435 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 7 SyntacticMatches, 5 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 396 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=331, Invalid=1475, Unknown=0, NotChecked=0, Total=1806 [2020-10-12 09:55:47,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-12 09:55:47,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 65. [2020-10-12 09:55:47,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-12 09:55:47,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 72 transitions. [2020-10-12 09:55:47,471 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 72 transitions. Word has length 49 [2020-10-12 09:55:47,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:55:47,471 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 72 transitions. [2020-10-12 09:55:47,471 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-12 09:55:47,472 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 72 transitions. [2020-10-12 09:55:47,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-12 09:55:47,479 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:55:47,479 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 5, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:55:47,480 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-12 09:55:47,482 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:55:47,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:55:47,483 INFO L82 PathProgramCache]: Analyzing trace with hash -1822392199, now seen corresponding path program 8 times [2020-10-12 09:55:47,483 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:55:47,483 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1458610644] [2020-10-12 09:55:47,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:55:47,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:55:47,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:47,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:47,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:50,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:50,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:52,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:52,499 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:55:52,499 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-12 09:55:52,499 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 09:55:52,499 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-12 09:55:52,500 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:55:52,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-12 09:55:52,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:55:52,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-12 09:55:52,500 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:55:53,301 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:55:53,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:55:53,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:53,305 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:55:53,305 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:55:53,305 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:55:53,305 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:55:53,305 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:55:53,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:55:53,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:55:53,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:55:53,306 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:55:53,308 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-10-12 09:55:53,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:55:53,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:53,312 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:55:53,312 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:55:53,312 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:55:53,312 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 09:55:53,312 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:55:53,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 09:55:53,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:55:53,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 09:55:53,313 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:55:53,326 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 4 proven. 71 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-12 09:55:53,326 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1458610644] [2020-10-12 09:55:53,326 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:55:53,327 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-12 09:55:53,327 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337640691] [2020-10-12 09:55:53,327 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-12 09:55:53,327 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:55:53,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-12 09:55:53,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=502, Unknown=0, NotChecked=0, Total=600 [2020-10-12 09:55:53,328 INFO L87 Difference]: Start difference. First operand 65 states and 72 transitions. Second operand 25 states. [2020-10-12 09:55:54,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:55:54,529 INFO L93 Difference]: Finished difference Result 83 states and 92 transitions. [2020-10-12 09:55:54,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-12 09:55:54,530 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 51 [2020-10-12 09:55:54,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:55:54,531 INFO L225 Difference]: With dead ends: 83 [2020-10-12 09:55:54,531 INFO L226 Difference]: Without dead ends: 81 [2020-10-12 09:55:54,532 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 8 SyntacticMatches, 5 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=265, Invalid=1295, Unknown=0, NotChecked=0, Total=1560 [2020-10-12 09:55:54,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-12 09:55:54,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 56. [2020-10-12 09:55:54,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-12 09:55:54,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 59 transitions. [2020-10-12 09:55:54,542 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 59 transitions. Word has length 51 [2020-10-12 09:55:54,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:55:54,542 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 59 transitions. [2020-10-12 09:55:54,542 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-12 09:55:54,542 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 59 transitions. [2020-10-12 09:55:54,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-12 09:55:54,543 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:55:54,544 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:55:54,544 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-12 09:55:54,544 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:55:54,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:55:54,544 INFO L82 PathProgramCache]: Analyzing trace with hash -911432522, now seen corresponding path program 9 times [2020-10-12 09:55:54,545 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:55:54,545 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [987783834] [2020-10-12 09:55:54,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:55:54,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:55:54,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:54,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:54,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:55,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:56,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:59,551 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:55:59,551 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-12 09:55:59,552 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 09:55:59,552 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-12 09:55:59,552 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:55:59,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-12 09:55:59,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:55:59,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-12 09:55:59,552 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:56:00,180 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:56:00,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:56:00,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:00,183 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:56:00,184 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:56:00,184 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:56:00,184 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:56:00,184 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:56:00,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:56:00,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:56:00,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:56:00,185 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:56:00,185 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-10-12 09:56:00,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:56:00,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:00,189 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:56:00,189 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:56:00,189 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:56:00,189 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 09:56:00,189 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:56:00,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 09:56:00,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:56:00,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 09:56:00,190 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:56:00,191 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-10-12 09:56:00,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:56:00,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:00,194 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:56:00,194 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:56:00,195 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:56:00,195 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 09:56:00,195 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:56:00,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 09:56:00,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-12 09:56:00,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 09:56:00,195 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:56:00,242 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 13 proven. 40 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-12 09:56:00,242 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [987783834] [2020-10-12 09:56:00,242 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:56:00,242 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-12 09:56:00,243 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144957658] [2020-10-12 09:56:00,243 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-12 09:56:00,243 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:56:00,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-12 09:56:00,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2020-10-12 09:56:00,244 INFO L87 Difference]: Start difference. First operand 56 states and 59 transitions. Second operand 20 states. [2020-10-12 09:56:00,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:56:00,996 INFO L93 Difference]: Finished difference Result 83 states and 92 transitions. [2020-10-12 09:56:00,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-12 09:56:00,997 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 53 [2020-10-12 09:56:00,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:56:00,998 INFO L225 Difference]: With dead ends: 83 [2020-10-12 09:56:00,998 INFO L226 Difference]: Without dead ends: 66 [2020-10-12 09:56:00,999 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 9 SyntacticMatches, 5 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=204, Invalid=726, Unknown=0, NotChecked=0, Total=930 [2020-10-12 09:56:00,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-12 09:56:01,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 58. [2020-10-12 09:56:01,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-12 09:56:01,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 61 transitions. [2020-10-12 09:56:01,020 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 61 transitions. Word has length 53 [2020-10-12 09:56:01,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:56:01,021 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 61 transitions. [2020-10-12 09:56:01,021 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-12 09:56:01,021 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 61 transitions. [2020-10-12 09:56:01,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-12 09:56:01,023 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:56:01,023 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:56:01,023 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-12 09:56:01,023 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:56:01,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:56:01,024 INFO L82 PathProgramCache]: Analyzing trace with hash 628228020, now seen corresponding path program 10 times [2020-10-12 09:56:01,024 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:56:01,024 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1298569125] [2020-10-12 09:56:01,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:56:01,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:56:01,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:01,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:01,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:01,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:02,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:06,039 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:56:06,039 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-12 09:56:06,039 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 09:56:06,039 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-12 09:56:06,039 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:56:06,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-12 09:56:06,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:56:06,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-12 09:56:06,040 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:56:06,789 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:56:06,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:56:06,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:06,794 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:56:06,794 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:56:06,794 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:56:06,794 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 09:56:06,794 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:56:06,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:56:06,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:56:06,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:56:06,795 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:56:06,797 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-10-12 09:56:06,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:56:06,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:06,801 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:56:06,801 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:56:06,801 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:56:06,802 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 09:56:06,802 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:56:06,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 09:56:06,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:56:06,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 09:56:06,802 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:56:06,803 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-10-12 09:56:06,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:56:06,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:06,808 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:56:06,808 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:56:06,808 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:56:06,808 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 09:56:06,808 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:56:06,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 09:56:06,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-12 09:56:06,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 09:56:06,809 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:56:06,870 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 13 proven. 49 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-12 09:56:06,871 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1298569125] [2020-10-12 09:56:06,871 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:56:06,871 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-12 09:56:06,871 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530999735] [2020-10-12 09:56:06,872 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-12 09:56:06,872 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:56:06,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-12 09:56:06,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=324, Unknown=0, NotChecked=0, Total=420 [2020-10-12 09:56:06,873 INFO L87 Difference]: Start difference. First operand 58 states and 61 transitions. Second operand 21 states. [2020-10-12 09:56:07,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:56:07,748 INFO L93 Difference]: Finished difference Result 91 states and 105 transitions. [2020-10-12 09:56:07,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-12 09:56:07,749 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 55 [2020-10-12 09:56:07,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:56:07,751 INFO L225 Difference]: With dead ends: 91 [2020-10-12 09:56:07,751 INFO L226 Difference]: Without dead ends: 74 [2020-10-12 09:56:07,752 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 10 SyntacticMatches, 5 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=272, Invalid=850, Unknown=0, NotChecked=0, Total=1122 [2020-10-12 09:56:07,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-12 09:56:07,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 64. [2020-10-12 09:56:07,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-12 09:56:07,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 67 transitions. [2020-10-12 09:56:07,763 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 67 transitions. Word has length 55 [2020-10-12 09:56:07,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:56:07,763 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 67 transitions. [2020-10-12 09:56:07,763 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-12 09:56:07,763 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 67 transitions. [2020-10-12 09:56:07,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-12 09:56:07,764 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:56:07,764 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 5, 5, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:56:07,765 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-12 09:56:07,765 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:56:07,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:56:07,765 INFO L82 PathProgramCache]: Analyzing trace with hash -1172773970, now seen corresponding path program 11 times [2020-10-12 09:56:07,766 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:56:07,766 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2057339795] [2020-10-12 09:56:07,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:56:07,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:56:07,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:07,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:07,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:09,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:10,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:12,780 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:56:12,780 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-12 09:56:12,780 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 09:56:12,780 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-12 09:56:12,781 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:56:12,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-12 09:56:12,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:56:12,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-12 09:56:12,781 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:56:13,850 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:56:13,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:56:13,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:13,853 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:56:13,853 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:56:13,853 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:56:13,854 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:56:13,854 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:56:13,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:56:13,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:56:13,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:56:13,855 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:56:13,856 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-10-12 09:56:13,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:56:13,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:13,859 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:56:13,859 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:56:13,859 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:56:13,859 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:56:13,859 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:56:13,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 09:56:13,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:56:13,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 09:56:13,860 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:56:13,860 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-10-12 09:56:13,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:56:13,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:13,864 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:56:13,864 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:56:13,864 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:56:13,865 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 09:56:13,865 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:56:13,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 09:56:13,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-12 09:56:13,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 09:56:13,865 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:56:13,928 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 13 proven. 88 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-12 09:56:13,928 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2057339795] [2020-10-12 09:56:13,928 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:56:13,929 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-12 09:56:13,929 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885729006] [2020-10-12 09:56:13,929 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-12 09:56:13,929 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:56:13,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-12 09:56:13,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=453, Unknown=0, NotChecked=0, Total=600 [2020-10-12 09:56:13,930 INFO L87 Difference]: Start difference. First operand 64 states and 67 transitions. Second operand 25 states. [2020-10-12 09:56:14,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:56:14,991 INFO L93 Difference]: Finished difference Result 95 states and 108 transitions. [2020-10-12 09:56:14,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-12 09:56:14,991 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 61 [2020-10-12 09:56:14,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:56:14,992 INFO L225 Difference]: With dead ends: 95 [2020-10-12 09:56:14,993 INFO L226 Difference]: Without dead ends: 78 [2020-10-12 09:56:14,995 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 8 SyntacticMatches, 9 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 263 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=363, Invalid=1119, Unknown=0, NotChecked=0, Total=1482 [2020-10-12 09:56:14,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-12 09:56:15,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 66. [2020-10-12 09:56:15,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-12 09:56:15,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 69 transitions. [2020-10-12 09:56:15,009 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 69 transitions. Word has length 61 [2020-10-12 09:56:15,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:56:15,010 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 69 transitions. [2020-10-12 09:56:15,010 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-12 09:56:15,010 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 69 transitions. [2020-10-12 09:56:15,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-12 09:56:15,011 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:56:15,011 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 5, 5, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:56:15,011 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-12 09:56:15,011 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:56:15,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:56:15,012 INFO L82 PathProgramCache]: Analyzing trace with hash -1412800340, now seen corresponding path program 12 times [2020-10-12 09:56:15,012 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:56:15,012 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [994413460] [2020-10-12 09:56:15,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:56:15,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:56:15,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:15,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:15,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:16,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:17,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:20,025 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:56:20,025 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-12 09:56:20,025 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 09:56:20,026 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-12 09:56:20,026 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:56:20,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-12 09:56:20,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:56:20,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-12 09:56:20,026 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:56:21,807 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:56:21,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:56:21,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:21,810 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:56:21,811 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:56:21,811 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:56:21,811 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:56:21,811 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:56:21,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:56:21,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:56:21,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:56:21,811 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:56:21,813 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-10-12 09:56:21,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:56:21,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:21,816 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:56:21,816 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:56:21,816 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:56:21,817 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 09:56:21,817 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:56:21,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 09:56:21,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:56:21,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 09:56:21,817 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:56:21,818 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-10-12 09:56:21,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:56:21,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:21,825 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:56:21,825 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:56:21,825 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:56:21,825 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 09:56:21,825 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:56:21,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 09:56:21,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-12 09:56:21,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 09:56:21,826 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:56:21,946 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 13 proven. 109 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-12 09:56:21,947 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [994413460] [2020-10-12 09:56:21,947 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:56:21,947 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-12 09:56:21,947 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481275702] [2020-10-12 09:56:21,948 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-12 09:56:21,948 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:56:21,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-12 09:56:21,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=522, Unknown=0, NotChecked=0, Total=702 [2020-10-12 09:56:21,949 INFO L87 Difference]: Start difference. First operand 66 states and 69 transitions. Second operand 27 states. [2020-10-12 09:56:23,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:56:23,524 INFO L93 Difference]: Finished difference Result 98 states and 112 transitions. [2020-10-12 09:56:23,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-12 09:56:23,524 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 63 [2020-10-12 09:56:23,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:56:23,525 INFO L225 Difference]: With dead ends: 98 [2020-10-12 09:56:23,525 INFO L226 Difference]: Without dead ends: 81 [2020-10-12 09:56:23,527 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 7 SyntacticMatches, 10 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 493 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=488, Invalid=1404, Unknown=0, NotChecked=0, Total=1892 [2020-10-12 09:56:23,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-12 09:56:23,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 68. [2020-10-12 09:56:23,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-12 09:56:23,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 71 transitions. [2020-10-12 09:56:23,536 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 71 transitions. Word has length 63 [2020-10-12 09:56:23,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:56:23,537 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 71 transitions. [2020-10-12 09:56:23,537 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-12 09:56:23,537 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 71 transitions. [2020-10-12 09:56:23,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-12 09:56:23,538 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:56:23,538 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 5, 5, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:56:23,538 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-12 09:56:23,538 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:56:23,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:56:23,539 INFO L82 PathProgramCache]: Analyzing trace with hash -149907926, now seen corresponding path program 13 times [2020-10-12 09:56:23,539 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:56:23,539 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [66231668] [2020-10-12 09:56:23,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:56:23,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:56:23,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:23,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:23,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:25,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:26,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:28,545 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:56:28,546 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-12 09:56:28,546 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 09:56:28,546 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-12 09:56:28,546 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:56:28,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-12 09:56:28,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:56:28,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-12 09:56:28,546 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:56:29,642 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:56:29,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:56:29,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:29,645 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:56:29,645 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:56:29,645 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:56:29,645 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:56:29,645 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:56:29,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:56:29,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:56:29,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:56:29,646 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:56:29,646 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-10-12 09:56:29,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:56:29,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:29,649 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:56:29,649 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:56:29,650 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:56:29,650 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:56:29,650 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:56:29,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 09:56:29,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:56:29,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 09:56:29,650 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:56:29,651 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-10-12 09:56:29,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:56:29,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:29,654 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:56:29,654 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:56:29,655 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:56:29,655 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 09:56:29,655 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:56:29,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 09:56:29,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-12 09:56:29,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 09:56:29,655 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:56:29,723 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 13 proven. 124 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-12 09:56:29,723 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [66231668] [2020-10-12 09:56:29,723 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:56:29,723 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-12 09:56:29,723 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594582047] [2020-10-12 09:56:29,724 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-12 09:56:29,724 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:56:29,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-12 09:56:29,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=469, Unknown=0, NotChecked=0, Total=650 [2020-10-12 09:56:29,725 INFO L87 Difference]: Start difference. First operand 68 states and 71 transitions. Second operand 26 states. [2020-10-12 09:56:30,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:56:30,927 INFO L93 Difference]: Finished difference Result 101 states and 116 transitions. [2020-10-12 09:56:30,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-12 09:56:30,928 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 65 [2020-10-12 09:56:30,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:56:30,929 INFO L225 Difference]: With dead ends: 101 [2020-10-12 09:56:30,929 INFO L226 Difference]: Without dead ends: 84 [2020-10-12 09:56:30,931 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 11 SyntacticMatches, 9 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=488, Invalid=1318, Unknown=0, NotChecked=0, Total=1806 [2020-10-12 09:56:30,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-12 09:56:30,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 70. [2020-10-12 09:56:30,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-12 09:56:30,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 73 transitions. [2020-10-12 09:56:30,942 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 73 transitions. Word has length 65 [2020-10-12 09:56:30,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:56:30,942 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 73 transitions. [2020-10-12 09:56:30,942 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-12 09:56:30,942 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 73 transitions. [2020-10-12 09:56:30,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-12 09:56:30,943 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:56:30,943 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 5, 5, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:56:30,943 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-12 09:56:30,943 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:56:30,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:56:30,943 INFO L82 PathProgramCache]: Analyzing trace with hash -1986042840, now seen corresponding path program 14 times [2020-10-12 09:56:30,944 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:56:30,944 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1190623925] [2020-10-12 09:56:30,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:56:30,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:56:30,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:30,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:30,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:32,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:34,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:35,953 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:56:35,953 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-12 09:56:35,953 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 09:56:35,953 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-12 09:56:35,953 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:56:35,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-12 09:56:35,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:56:35,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-12 09:56:35,954 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:56:37,444 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:56:37,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:56:37,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:37,447 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:56:37,447 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:56:37,447 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:56:37,447 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:56:37,447 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:56:37,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:56:37,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:56:37,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:56:37,448 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:56:37,449 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-10-12 09:56:37,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:56:37,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:37,452 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:56:37,452 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:56:37,452 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:56:37,452 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:56:37,452 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:56:37,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 09:56:37,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:56:37,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 09:56:37,453 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:56:37,453 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-10-12 09:56:37,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:56:37,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:37,456 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:56:37,457 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:56:37,457 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:56:37,457 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 09:56:37,457 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:56:37,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 09:56:37,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-12 09:56:37,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 09:56:37,457 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:56:37,529 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 13 proven. 145 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-12 09:56:37,529 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1190623925] [2020-10-12 09:56:37,530 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:56:37,530 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-12 09:56:37,530 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128815613] [2020-10-12 09:56:37,530 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-12 09:56:37,531 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:56:37,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-12 09:56:37,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=540, Unknown=0, NotChecked=0, Total=756 [2020-10-12 09:56:37,532 INFO L87 Difference]: Start difference. First operand 70 states and 73 transitions. Second operand 28 states. [2020-10-12 09:56:38,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:56:38,753 INFO L93 Difference]: Finished difference Result 104 states and 120 transitions. [2020-10-12 09:56:38,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-12 09:56:38,754 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 67 [2020-10-12 09:56:38,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:56:38,755 INFO L225 Difference]: With dead ends: 104 [2020-10-12 09:56:38,756 INFO L226 Difference]: Without dead ends: 87 [2020-10-12 09:56:38,757 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 10 SyntacticMatches, 10 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 383 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=531, Invalid=1449, Unknown=0, NotChecked=0, Total=1980 [2020-10-12 09:56:38,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-12 09:56:38,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 72. [2020-10-12 09:56:38,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-12 09:56:38,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 75 transitions. [2020-10-12 09:56:38,767 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 75 transitions. Word has length 67 [2020-10-12 09:56:38,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:56:38,767 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 75 transitions. [2020-10-12 09:56:38,767 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-12 09:56:38,767 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 75 transitions. [2020-10-12 09:56:38,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-12 09:56:38,768 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:56:38,768 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 5, 5, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:56:38,768 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-12 09:56:38,768 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:56:38,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:56:38,769 INFO L82 PathProgramCache]: Analyzing trace with hash -1280136538, now seen corresponding path program 15 times [2020-10-12 09:56:38,769 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:56:38,769 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1771734672] [2020-10-12 09:56:38,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:56:38,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:56:38,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:38,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:38,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:40,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:41,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:43,781 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:56:43,782 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-12 09:56:43,782 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 09:56:43,782 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-12 09:56:43,782 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:56:43,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 41 [2020-10-12 09:56:43,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:56:43,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-12 09:56:43,783 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:56:45,609 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:56:45,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:56:45,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:45,614 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:56:45,614 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:56:45,615 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:56:45,615 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 09:56:45,615 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:56:45,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:56:45,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:56:45,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:56:45,616 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:56:45,617 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-10-12 09:56:45,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:56:45,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:45,624 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:56:45,624 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:56:45,625 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:56:45,625 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 09:56:45,625 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:56:45,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 09:56:45,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:56:45,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 09:56:45,626 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:56:45,629 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-10-12 09:56:45,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:56:45,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:45,636 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:56:45,636 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:56:45,637 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:56:45,637 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-12 09:56:45,637 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:56:45,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 09:56:45,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-12 09:56:45,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 09:56:45,638 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:56:45,730 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 13 proven. 168 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-12 09:56:45,731 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1771734672] [2020-10-12 09:56:45,731 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:56:45,731 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-12 09:56:45,733 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074448341] [2020-10-12 09:56:45,734 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-12 09:56:45,734 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:56:45,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-12 09:56:45,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=547, Unknown=0, NotChecked=0, Total=756 [2020-10-12 09:56:45,735 INFO L87 Difference]: Start difference. First operand 72 states and 75 transitions. Second operand 28 states. [2020-10-12 09:56:47,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:56:47,150 INFO L93 Difference]: Finished difference Result 107 states and 124 transitions. [2020-10-12 09:56:47,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-12 09:56:47,151 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 69 [2020-10-12 09:56:47,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:56:47,152 INFO L225 Difference]: With dead ends: 107 [2020-10-12 09:56:47,152 INFO L226 Difference]: Without dead ends: 90 [2020-10-12 09:56:47,154 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 9 SyntacticMatches, 13 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 409 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=592, Invalid=1570, Unknown=0, NotChecked=0, Total=2162 [2020-10-12 09:56:47,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-12 09:56:47,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 74. [2020-10-12 09:56:47,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-12 09:56:47,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 77 transitions. [2020-10-12 09:56:47,165 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 77 transitions. Word has length 69 [2020-10-12 09:56:47,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:56:47,165 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 77 transitions. [2020-10-12 09:56:47,165 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-12 09:56:47,166 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 77 transitions. [2020-10-12 09:56:47,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-12 09:56:47,166 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:56:47,166 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 5, 5, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:56:47,166 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-12 09:56:47,167 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:56:47,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:56:47,167 INFO L82 PathProgramCache]: Analyzing trace with hash -1509013084, now seen corresponding path program 16 times [2020-10-12 09:56:47,167 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:56:47,167 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [584332501] [2020-10-12 09:56:47,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:56:47,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:56:47,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:47,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:47,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:49,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:50,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:52,172 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:56:52,173 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-12 09:56:52,173 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 09:56:52,173 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-12 09:56:52,173 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:56:52,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 43 [2020-10-12 09:56:52,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:56:52,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-12 09:56:52,174 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:56:53,914 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:56:53,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:56:53,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:53,917 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:56:53,917 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:56:53,917 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:56:53,917 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:56:53,917 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:56:53,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:56:53,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:56:53,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:56:53,918 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:56:53,918 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-10-12 09:56:53,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:56:53,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:53,922 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:56:53,922 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:56:53,922 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:56:53,922 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 09:56:53,922 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:56:53,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 09:56:53,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:56:53,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 09:56:53,923 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:56:53,924 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2020-10-12 09:56:53,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:56:53,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:53,927 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:56:53,928 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:56:53,928 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:56:53,928 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 09:56:53,928 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:56:53,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 09:56:53,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-12 09:56:53,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 09:56:53,929 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:56:54,009 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 13 proven. 193 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-12 09:56:54,009 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [584332501] [2020-10-12 09:56:54,009 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:56:54,009 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-12 09:56:54,010 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301859227] [2020-10-12 09:56:54,010 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-12 09:56:54,010 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:56:54,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-12 09:56:54,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=567, Unknown=0, NotChecked=0, Total=812 [2020-10-12 09:56:54,011 INFO L87 Difference]: Start difference. First operand 74 states and 77 transitions. Second operand 29 states. [2020-10-12 09:56:55,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:56:55,397 INFO L93 Difference]: Finished difference Result 110 states and 128 transitions. [2020-10-12 09:56:55,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-12 09:56:55,397 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 71 [2020-10-12 09:56:55,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:56:55,399 INFO L225 Difference]: With dead ends: 110 [2020-10-12 09:56:55,399 INFO L226 Difference]: Without dead ends: 93 [2020-10-12 09:56:55,401 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 9 SyntacticMatches, 14 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 518 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=631, Invalid=1625, Unknown=0, NotChecked=0, Total=2256 [2020-10-12 09:56:55,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-12 09:56:55,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 76. [2020-10-12 09:56:55,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-12 09:56:55,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 79 transitions. [2020-10-12 09:56:55,414 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 79 transitions. Word has length 71 [2020-10-12 09:56:55,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:56:55,414 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 79 transitions. [2020-10-12 09:56:55,414 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-12 09:56:55,414 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 79 transitions. [2020-10-12 09:56:55,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-12 09:56:55,415 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:56:55,415 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 5, 5, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:56:55,415 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-12 09:56:55,416 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:56:55,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:56:55,416 INFO L82 PathProgramCache]: Analyzing trace with hash 1878925602, now seen corresponding path program 17 times [2020-10-12 09:56:55,416 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:56:55,417 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [728689300] [2020-10-12 09:56:55,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:56:55,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:56:55,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:55,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:55,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:57:00,422 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:57:00,422 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-12 09:57:00,423 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 09:57:00,423 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-12 09:57:00,423 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:57:00,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-12 09:57:00,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-10-12 09:57:00,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-12 09:57:00,423 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:57:00,619 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:57:00,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:57:00,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:57:00,627 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:57:00,628 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:57:00,628 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:57:00,628 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 09:57:00,629 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:57:00,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:57:00,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:57:00,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:57:00,632 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-12 09:57:00,633 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-10-12 09:57:00,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:57:00,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:57:00,636 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:57:00,639 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:57:00,639 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:57:00,639 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:57:00,640 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:57:00,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:57:00,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 09:57:00,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:57:00,640 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:57:00,647 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-10-12 09:57:00,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:57:00,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:57:00,651 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:57:00,651 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:57:00,651 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:57:00,651 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 09:57:00,652 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:57:00,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:57:00,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 09:57:00,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:57:00,653 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:57:00,662 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 4 proven. 196 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-10-12 09:57:00,662 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [728689300] [2020-10-12 09:57:00,662 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:57:00,663 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-12 09:57:00,663 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737181211] [2020-10-12 09:57:00,668 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-12 09:57:00,668 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:57:00,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-12 09:57:00,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-12 09:57:00,669 INFO L87 Difference]: Start difference. First operand 76 states and 79 transitions. Second operand 18 states. [2020-10-12 09:57:00,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:57:00,993 INFO L93 Difference]: Finished difference Result 180 states and 209 transitions. [2020-10-12 09:57:00,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-12 09:57:00,993 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 73 [2020-10-12 09:57:00,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:57:00,995 INFO L225 Difference]: With dead ends: 180 [2020-10-12 09:57:00,995 INFO L226 Difference]: Without dead ends: 113 [2020-10-12 09:57:00,995 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-12 09:57:00,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-12 09:57:01,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 111. [2020-10-12 09:57:01,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-10-12 09:57:01,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 114 transitions. [2020-10-12 09:57:01,021 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 114 transitions. Word has length 73 [2020-10-12 09:57:01,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:57:01,022 INFO L479 AbstractCegarLoop]: Abstraction has 111 states and 114 transitions. [2020-10-12 09:57:01,022 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-12 09:57:01,022 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 114 transitions. [2020-10-12 09:57:01,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-10-12 09:57:01,023 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:57:01,023 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:57:01,023 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-12 09:57:01,023 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:57:01,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:57:01,024 INFO L82 PathProgramCache]: Analyzing trace with hash 403924496, now seen corresponding path program 18 times [2020-10-12 09:57:01,024 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:57:01,024 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1735808529] [2020-10-12 09:57:01,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:57:01,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:57:01,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:57:01,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:57:01,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:57:06,076 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:57:06,076 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 120 [2020-10-12 09:57:06,076 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 09:57:06,076 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5040 [2020-10-12 09:57:06,076 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:57:06,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-12 09:57:06,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:57:06,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-12 09:57:06,077 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:57:06,271 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:57:06,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:57:06,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:57:06,274 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:57:06,274 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:57:06,274 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:57:06,275 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:57:06,275 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:57:06,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:57:06,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:57:06,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:57:06,276 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:57:06,277 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2020-10-12 09:57:06,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:57:06,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:57:06,278 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:57:06,278 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:57:06,278 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:57:06,278 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 09:57:06,278 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:57:06,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:57:06,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 09:57:06,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:57:06,279 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:57:06,280 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2020-10-12 09:57:06,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:57:06,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:57:06,281 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:57:06,281 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:57:06,281 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:57:06,281 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 09:57:06,282 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:57:06,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:57:06,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 09:57:06,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:57:06,282 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:57:06,288 INFO L134 CoverageAnalysis]: Checked inductivity of 586 backedges. 4 proven. 120 refuted. 0 times theorem prover too weak. 462 trivial. 0 not checked. [2020-10-12 09:57:06,288 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1735808529] [2020-10-12 09:57:06,288 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:57:06,288 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-12 09:57:06,289 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628745557] [2020-10-12 09:57:06,289 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-12 09:57:06,289 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:57:06,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-12 09:57:06,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-12 09:57:06,290 INFO L87 Difference]: Start difference. First operand 111 states and 114 transitions. Second operand 19 states. [2020-10-12 09:57:06,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:57:06,552 INFO L93 Difference]: Finished difference Result 207 states and 215 transitions. [2020-10-12 09:57:06,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-12 09:57:06,553 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 108 [2020-10-12 09:57:06,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:57:06,556 INFO L225 Difference]: With dead ends: 207 [2020-10-12 09:57:06,556 INFO L226 Difference]: Without dead ends: 118 [2020-10-12 09:57:06,557 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-12 09:57:06,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-12 09:57:06,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 116. [2020-10-12 09:57:06,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-10-12 09:57:06,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 119 transitions. [2020-10-12 09:57:06,582 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 119 transitions. Word has length 108 [2020-10-12 09:57:06,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:57:06,582 INFO L479 AbstractCegarLoop]: Abstraction has 116 states and 119 transitions. [2020-10-12 09:57:06,582 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-12 09:57:06,582 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 119 transitions. [2020-10-12 09:57:06,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-10-12 09:57:06,583 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:57:06,583 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:57:06,583 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-12 09:57:06,584 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:57:06,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:57:06,584 INFO L82 PathProgramCache]: Analyzing trace with hash 1548226120, now seen corresponding path program 19 times [2020-10-12 09:57:06,584 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:57:06,584 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1353462870] [2020-10-12 09:57:06,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:57:06,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:57:06,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:57:06,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:57:06,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:57:11,641 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:57:11,641 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 125 [2020-10-12 09:57:11,641 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 09:57:11,642 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5045 [2020-10-12 09:57:11,642 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:57:11,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-12 09:57:11,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-12 09:57:11,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-12 09:57:11,642 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:57:11,868 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:57:11,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:57:11,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:57:11,871 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:57:11,871 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:57:11,872 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:57:11,872 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:57:11,872 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:57:11,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:57:11,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:57:11,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:57:11,873 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:57:11,874 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-10-12 09:57:11,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:57:11,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:57:11,876 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:57:11,876 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:57:11,876 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:57:11,876 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:57:11,877 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:57:11,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:57:11,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 09:57:11,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:57:11,877 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:57:11,878 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2020-10-12 09:57:11,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:57:11,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:57:11,880 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:57:11,880 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:57:11,880 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:57:11,881 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 09:57:11,881 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:57:11,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:57:11,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 09:57:11,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:57:11,881 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:57:11,891 INFO L134 CoverageAnalysis]: Checked inductivity of 664 backedges. 4 proven. 256 refuted. 0 times theorem prover too weak. 404 trivial. 0 not checked. [2020-10-12 09:57:11,891 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1353462870] [2020-10-12 09:57:11,891 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:57:11,892 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-12 09:57:11,892 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652032719] [2020-10-12 09:57:11,892 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-12 09:57:11,892 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:57:11,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-12 09:57:11,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-12 09:57:11,893 INFO L87 Difference]: Start difference. First operand 116 states and 119 transitions. Second operand 20 states. [2020-10-12 09:57:12,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:57:12,209 INFO L93 Difference]: Finished difference Result 216 states and 224 transitions. [2020-10-12 09:57:12,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-12 09:57:12,210 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 113 [2020-10-12 09:57:12,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:57:12,211 INFO L225 Difference]: With dead ends: 216 [2020-10-12 09:57:12,211 INFO L226 Difference]: Without dead ends: 123 [2020-10-12 09:57:12,212 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-12 09:57:12,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-10-12 09:57:12,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 121. [2020-10-12 09:57:12,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-12 09:57:12,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 124 transitions. [2020-10-12 09:57:12,235 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 124 transitions. Word has length 113 [2020-10-12 09:57:12,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:57:12,235 INFO L479 AbstractCegarLoop]: Abstraction has 121 states and 124 transitions. [2020-10-12 09:57:12,235 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-12 09:57:12,235 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 124 transitions. [2020-10-12 09:57:12,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2020-10-12 09:57:12,236 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:57:12,237 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:57:12,237 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-12 09:57:12,237 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:57:12,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:57:12,237 INFO L82 PathProgramCache]: Analyzing trace with hash 593259272, now seen corresponding path program 20 times [2020-10-12 09:57:12,237 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:57:12,238 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1442229007] [2020-10-12 09:57:12,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:57:12,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:57:12,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:57:12,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:57:12,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:57:17,256 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:57:17,256 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 130 [2020-10-12 09:57:17,256 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 09:57:17,256 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-12 09:57:17,257 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:57:17,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-12 09:57:17,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:57:17,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-12 09:57:17,257 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:57:17,508 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:57:17,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:57:17,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:57:17,511 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:57:17,511 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:57:17,511 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:57:17,511 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:57:17,511 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:57:17,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:57:17,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:57:17,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:57:17,512 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:57:17,512 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2020-10-12 09:57:17,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:57:17,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:57:17,514 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:57:17,514 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:57:17,514 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:57:17,514 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 09:57:17,514 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:57:17,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:57:17,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 09:57:17,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:57:17,515 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:57:17,515 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2020-10-12 09:57:17,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:57:17,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:57:17,517 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:57:17,517 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:57:17,517 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:57:17,517 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 09:57:17,517 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:57:17,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:57:17,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 09:57:17,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:57:17,518 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:57:17,526 INFO L134 CoverageAnalysis]: Checked inductivity of 747 backedges. 4 proven. 153 refuted. 0 times theorem prover too weak. 590 trivial. 0 not checked. [2020-10-12 09:57:17,526 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1442229007] [2020-10-12 09:57:17,526 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:57:17,526 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-12 09:57:17,527 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227056979] [2020-10-12 09:57:17,527 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-12 09:57:17,527 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:57:17,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-12 09:57:17,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-12 09:57:17,528 INFO L87 Difference]: Start difference. First operand 121 states and 124 transitions. Second operand 21 states. [2020-10-12 09:57:17,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:57:17,882 INFO L93 Difference]: Finished difference Result 225 states and 233 transitions. [2020-10-12 09:57:17,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-12 09:57:17,886 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 118 [2020-10-12 09:57:17,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:57:17,887 INFO L225 Difference]: With dead ends: 225 [2020-10-12 09:57:17,887 INFO L226 Difference]: Without dead ends: 128 [2020-10-12 09:57:17,889 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-12 09:57:17,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-10-12 09:57:17,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 126. [2020-10-12 09:57:17,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-10-12 09:57:17,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 129 transitions. [2020-10-12 09:57:17,911 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 129 transitions. Word has length 118 [2020-10-12 09:57:17,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:57:17,912 INFO L479 AbstractCegarLoop]: Abstraction has 126 states and 129 transitions. [2020-10-12 09:57:17,912 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-12 09:57:17,912 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 129 transitions. [2020-10-12 09:57:17,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2020-10-12 09:57:17,912 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:57:17,913 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:57:17,913 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-12 09:57:17,913 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:57:17,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:57:17,913 INFO L82 PathProgramCache]: Analyzing trace with hash -1636119488, now seen corresponding path program 21 times [2020-10-12 09:57:17,913 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:57:17,914 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2137662336] [2020-10-12 09:57:17,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:57:17,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:57:17,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:57:17,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:57:18,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:57:22,995 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:57:22,995 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 135 [2020-10-12 09:57:22,995 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 09:57:22,995 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5069 [2020-10-12 09:57:22,996 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:57:22,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-12 09:57:22,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:57:22,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-12 09:57:22,996 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:57:23,263 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:57:23,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:57:23,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:57:23,266 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:57:23,267 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:57:23,267 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:57:23,267 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:57:23,267 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:57:23,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:57:23,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:57:23,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:57:23,267 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:57:23,268 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2020-10-12 09:57:23,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:57:23,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:57:23,271 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:57:23,271 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:57:23,271 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:57:23,271 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:57:23,271 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:57:23,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:57:23,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 09:57:23,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:57:23,272 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:57:23,273 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2020-10-12 09:57:23,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:57:23,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:57:23,275 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:57:23,275 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:57:23,276 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:57:23,276 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:57:23,276 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:57:23,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:57:23,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 09:57:23,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:57:23,277 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:57:23,287 INFO L134 CoverageAnalysis]: Checked inductivity of 835 backedges. 4 proven. 171 refuted. 0 times theorem prover too weak. 660 trivial. 0 not checked. [2020-10-12 09:57:23,287 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2137662336] [2020-10-12 09:57:23,288 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:57:23,288 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-12 09:57:23,288 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23426201] [2020-10-12 09:57:23,289 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-12 09:57:23,289 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:57:23,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-12 09:57:23,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-12 09:57:23,290 INFO L87 Difference]: Start difference. First operand 126 states and 129 transitions. Second operand 22 states. [2020-10-12 09:57:23,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:57:23,622 INFO L93 Difference]: Finished difference Result 234 states and 242 transitions. [2020-10-12 09:57:23,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-12 09:57:23,623 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 123 [2020-10-12 09:57:23,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:57:23,624 INFO L225 Difference]: With dead ends: 234 [2020-10-12 09:57:23,624 INFO L226 Difference]: Without dead ends: 133 [2020-10-12 09:57:23,625 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-12 09:57:23,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-10-12 09:57:23,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 131. [2020-10-12 09:57:23,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-10-12 09:57:23,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 134 transitions. [2020-10-12 09:57:23,652 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 134 transitions. Word has length 123 [2020-10-12 09:57:23,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:57:23,652 INFO L479 AbstractCegarLoop]: Abstraction has 131 states and 134 transitions. [2020-10-12 09:57:23,652 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-12 09:57:23,652 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 134 transitions. [2020-10-12 09:57:23,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-10-12 09:57:23,654 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:57:23,654 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:57:23,654 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-12 09:57:23,655 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:57:23,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:57:23,655 INFO L82 PathProgramCache]: Analyzing trace with hash -655140864, now seen corresponding path program 22 times [2020-10-12 09:57:23,655 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:57:23,655 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [748816565] [2020-10-12 09:57:23,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:57:23,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:57:23,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:57:23,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:57:23,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:57:28,795 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:57:28,796 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 140 [2020-10-12 09:57:28,796 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 09:57:28,796 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5127 [2020-10-12 09:57:28,804 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:57:28,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-12 09:57:28,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 32 [2020-10-12 09:57:28,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-12 09:57:28,805 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:57:29,124 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:57:29,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:57:29,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:57:29,127 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:57:29,127 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:57:29,127 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:57:29,128 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:57:29,128 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:57:29,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:57:29,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:57:29,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:57:29,128 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:57:29,129 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2020-10-12 09:57:29,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:57:29,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:57:29,131 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:57:29,131 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:57:29,131 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:57:29,131 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 09:57:29,131 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:57:29,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:57:29,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 09:57:29,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:57:29,132 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:57:29,132 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2020-10-12 09:57:29,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:57:29,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:57:29,134 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:57:29,134 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:57:29,134 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:57:29,134 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 09:57:29,134 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:57:29,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:57:29,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 09:57:29,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:57:29,135 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:57:29,146 INFO L134 CoverageAnalysis]: Checked inductivity of 928 backedges. 4 proven. 361 refuted. 0 times theorem prover too weak. 563 trivial. 0 not checked. [2020-10-12 09:57:29,147 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [748816565] [2020-10-12 09:57:29,147 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:57:29,147 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-12 09:57:29,147 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802950394] [2020-10-12 09:57:29,147 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-12 09:57:29,148 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:57:29,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-12 09:57:29,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-12 09:57:29,148 INFO L87 Difference]: Start difference. First operand 131 states and 134 transitions. Second operand 23 states. [2020-10-12 09:57:29,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:57:29,526 INFO L93 Difference]: Finished difference Result 243 states and 251 transitions. [2020-10-12 09:57:29,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-12 09:57:29,527 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 128 [2020-10-12 09:57:29,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:57:29,529 INFO L225 Difference]: With dead ends: 243 [2020-10-12 09:57:29,529 INFO L226 Difference]: Without dead ends: 138 [2020-10-12 09:57:29,530 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-12 09:57:29,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-10-12 09:57:29,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 136. [2020-10-12 09:57:29,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-10-12 09:57:29,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 139 transitions. [2020-10-12 09:57:29,554 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 139 transitions. Word has length 128 [2020-10-12 09:57:29,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:57:29,555 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 139 transitions. [2020-10-12 09:57:29,555 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-12 09:57:29,555 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 139 transitions. [2020-10-12 09:57:29,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2020-10-12 09:57:29,556 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:57:29,556 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:57:29,557 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-12 09:57:29,557 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:57:29,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:57:29,557 INFO L82 PathProgramCache]: Analyzing trace with hash -641650120, now seen corresponding path program 23 times [2020-10-12 09:57:29,557 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:57:29,558 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1219059149] [2020-10-12 09:57:29,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:57:29,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:57:29,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:57:29,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:57:29,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:57:34,684 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:57:34,684 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 145 [2020-10-12 09:57:34,685 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 09:57:34,685 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5109 [2020-10-12 09:57:34,685 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:57:34,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-12 09:57:34,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-12 09:57:34,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-12 09:57:34,685 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:57:35,017 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:57:35,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:57:35,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:57:35,020 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:57:35,020 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:57:35,020 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:57:35,020 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:57:35,021 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:57:35,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:57:35,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:57:35,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:57:35,021 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:57:35,022 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2020-10-12 09:57:35,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:57:35,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:57:35,023 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:57:35,023 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:57:35,023 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:57:35,023 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 09:57:35,024 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:57:35,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:57:35,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 09:57:35,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:57:35,024 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:57:35,025 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2020-10-12 09:57:35,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:57:35,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:57:35,028 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:57:35,028 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:57:35,028 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:57:35,028 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:57:35,029 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:57:35,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:57:35,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 09:57:35,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:57:35,029 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:57:35,038 INFO L134 CoverageAnalysis]: Checked inductivity of 1026 backedges. 4 proven. 400 refuted. 0 times theorem prover too weak. 622 trivial. 0 not checked. [2020-10-12 09:57:35,039 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1219059149] [2020-10-12 09:57:35,039 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:57:35,039 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-12 09:57:35,039 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31875751] [2020-10-12 09:57:35,040 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-12 09:57:35,040 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:57:35,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-12 09:57:35,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-12 09:57:35,041 INFO L87 Difference]: Start difference. First operand 136 states and 139 transitions. Second operand 24 states. [2020-10-12 09:57:35,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:57:35,351 INFO L93 Difference]: Finished difference Result 252 states and 260 transitions. [2020-10-12 09:57:35,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-12 09:57:35,351 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 133 [2020-10-12 09:57:35,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:57:35,353 INFO L225 Difference]: With dead ends: 252 [2020-10-12 09:57:35,353 INFO L226 Difference]: Without dead ends: 143 [2020-10-12 09:57:35,354 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-12 09:57:35,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-10-12 09:57:35,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 141. [2020-10-12 09:57:35,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-10-12 09:57:35,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 144 transitions. [2020-10-12 09:57:35,377 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 144 transitions. Word has length 133 [2020-10-12 09:57:35,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:57:35,377 INFO L479 AbstractCegarLoop]: Abstraction has 141 states and 144 transitions. [2020-10-12 09:57:35,377 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-12 09:57:35,377 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 144 transitions. [2020-10-12 09:57:35,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-10-12 09:57:35,379 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:57:35,379 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:57:35,379 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-12 09:57:35,379 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:57:35,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:57:35,380 INFO L82 PathProgramCache]: Analyzing trace with hash -2117587720, now seen corresponding path program 24 times [2020-10-12 09:57:35,380 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:57:35,380 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [584013895] [2020-10-12 09:57:35,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:57:35,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:57:35,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:57:35,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:57:35,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:57:40,401 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:57:40,401 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 150 [2020-10-12 09:57:40,401 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 09:57:40,401 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-12 09:57:40,402 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:57:40,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-12 09:57:40,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:57:40,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-12 09:57:40,402 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:57:40,752 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:57:40,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:57:40,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:57:40,755 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:57:40,756 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:57:40,756 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:57:40,756 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:57:40,756 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:57:40,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:57:40,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:57:40,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:57:40,757 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:57:40,758 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-10-12 09:57:40,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:57:40,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:57:40,759 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:57:40,759 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:57:40,759 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:57:40,760 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 09:57:40,760 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:57:40,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:57:40,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 09:57:40,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:57:40,760 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:57:40,762 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2020-10-12 09:57:40,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:57:40,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:57:40,764 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:57:40,765 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:57:40,765 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:57:40,765 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:57:40,765 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:57:40,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:57:40,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 09:57:40,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:57:40,766 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:57:40,774 INFO L134 CoverageAnalysis]: Checked inductivity of 1129 backedges. 4 proven. 231 refuted. 0 times theorem prover too weak. 894 trivial. 0 not checked. [2020-10-12 09:57:40,774 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [584013895] [2020-10-12 09:57:40,774 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:57:40,774 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-12 09:57:40,774 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637630601] [2020-10-12 09:57:40,775 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-12 09:57:40,775 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:57:40,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-12 09:57:40,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-12 09:57:40,776 INFO L87 Difference]: Start difference. First operand 141 states and 144 transitions. Second operand 25 states. [2020-10-12 09:57:41,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:57:41,209 INFO L93 Difference]: Finished difference Result 261 states and 269 transitions. [2020-10-12 09:57:41,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-12 09:57:41,210 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 138 [2020-10-12 09:57:41,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:57:41,212 INFO L225 Difference]: With dead ends: 261 [2020-10-12 09:57:41,212 INFO L226 Difference]: Without dead ends: 148 [2020-10-12 09:57:41,213 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-12 09:57:41,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-10-12 09:57:41,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 146. [2020-10-12 09:57:41,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-10-12 09:57:41,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 149 transitions. [2020-10-12 09:57:41,240 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 149 transitions. Word has length 138 [2020-10-12 09:57:41,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:57:41,240 INFO L479 AbstractCegarLoop]: Abstraction has 146 states and 149 transitions. [2020-10-12 09:57:41,240 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-12 09:57:41,240 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 149 transitions. [2020-10-12 09:57:41,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2020-10-12 09:57:41,241 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:57:41,242 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:57:41,242 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-12 09:57:41,242 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:57:41,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:57:41,243 INFO L82 PathProgramCache]: Analyzing trace with hash -841269200, now seen corresponding path program 25 times [2020-10-12 09:57:41,243 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:57:41,243 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [11797188] [2020-10-12 09:57:41,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:57:41,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:57:41,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:57:41,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:57:41,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:57:46,326 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:57:46,327 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 155 [2020-10-12 09:57:46,327 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 09:57:46,327 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5065 [2020-10-12 09:57:46,327 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:57:46,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-12 09:57:46,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:57:46,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-12 09:57:46,327 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:57:46,703 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:57:46,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:57:46,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:57:46,708 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:57:46,709 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:57:46,709 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:57:46,709 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:57:46,709 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:57:46,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:57:46,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:57:46,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:57:46,710 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:57:46,710 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2020-10-12 09:57:46,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:57:46,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:57:46,712 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:57:46,712 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:57:46,713 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:57:46,713 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:57:46,713 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:57:46,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:57:46,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 09:57:46,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:57:46,713 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:57:46,714 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2020-10-12 09:57:46,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:57:46,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:57:46,715 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:57:46,715 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:57:46,715 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:57:46,716 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 09:57:46,716 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:57:46,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:57:46,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 09:57:46,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:57:46,716 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:57:46,724 INFO L134 CoverageAnalysis]: Checked inductivity of 1237 backedges. 4 proven. 253 refuted. 0 times theorem prover too weak. 980 trivial. 0 not checked. [2020-10-12 09:57:46,725 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [11797188] [2020-10-12 09:57:46,725 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:57:46,725 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-12 09:57:46,725 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880916573] [2020-10-12 09:57:46,725 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-12 09:57:46,725 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:57:46,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-12 09:57:46,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-12 09:57:46,726 INFO L87 Difference]: Start difference. First operand 146 states and 149 transitions. Second operand 26 states. [2020-10-12 09:57:47,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:57:47,274 INFO L93 Difference]: Finished difference Result 270 states and 278 transitions. [2020-10-12 09:57:47,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-12 09:57:47,278 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 143 [2020-10-12 09:57:47,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:57:47,279 INFO L225 Difference]: With dead ends: 270 [2020-10-12 09:57:47,280 INFO L226 Difference]: Without dead ends: 153 [2020-10-12 09:57:47,281 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-12 09:57:47,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-10-12 09:57:47,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 151. [2020-10-12 09:57:47,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2020-10-12 09:57:47,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 154 transitions. [2020-10-12 09:57:47,331 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 154 transitions. Word has length 143 [2020-10-12 09:57:47,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:57:47,332 INFO L479 AbstractCegarLoop]: Abstraction has 151 states and 154 transitions. [2020-10-12 09:57:47,332 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-12 09:57:47,332 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 154 transitions. [2020-10-12 09:57:47,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-10-12 09:57:47,333 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:57:47,333 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:57:47,334 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-12 09:57:47,334 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:57:47,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:57:47,334 INFO L82 PathProgramCache]: Analyzing trace with hash 1087039984, now seen corresponding path program 26 times [2020-10-12 09:57:47,334 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:57:47,335 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1159905979] [2020-10-12 09:57:47,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:57:47,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:57:47,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:57:47,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:57:50,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:57:52,371 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:57:52,372 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 160 [2020-10-12 09:57:52,372 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 09:57:52,372 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-12 09:57:52,372 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:57:52,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-12 09:57:52,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 36 [2020-10-12 09:57:52,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-12 09:57:52,373 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:57:52,789 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:57:52,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:57:52,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:57:52,792 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:57:52,793 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:57:52,793 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:57:52,793 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:57:52,793 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:57:52,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:57:52,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:57:52,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:57:52,793 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:57:52,794 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2020-10-12 09:57:52,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:57:52,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:57:52,796 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:57:52,796 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:57:52,797 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:57:52,797 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:57:52,797 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:57:52,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:57:52,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 09:57:52,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:57:52,797 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:57:52,798 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 136 [2020-10-12 09:57:52,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:57:52,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:57:52,800 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:57:52,800 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:57:52,800 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:57:52,800 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 09:57:52,800 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:57:52,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:57:52,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 09:57:52,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:57:52,801 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:57:52,811 INFO L134 CoverageAnalysis]: Checked inductivity of 1350 backedges. 4 proven. 529 refuted. 0 times theorem prover too weak. 817 trivial. 0 not checked. [2020-10-12 09:57:52,812 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1159905979] [2020-10-12 09:57:52,812 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:57:52,812 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-12 09:57:52,812 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523784115] [2020-10-12 09:57:52,813 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-12 09:57:52,813 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:57:52,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-12 09:57:52,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-12 09:57:52,813 INFO L87 Difference]: Start difference. First operand 151 states and 154 transitions. Second operand 27 states. [2020-10-12 09:57:53,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:57:53,176 INFO L93 Difference]: Finished difference Result 279 states and 287 transitions. [2020-10-12 09:57:53,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-12 09:57:53,177 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 148 [2020-10-12 09:57:53,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:57:53,179 INFO L225 Difference]: With dead ends: 279 [2020-10-12 09:57:53,179 INFO L226 Difference]: Without dead ends: 158 [2020-10-12 09:57:53,180 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-12 09:57:53,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2020-10-12 09:57:53,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 156. [2020-10-12 09:57:53,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-10-12 09:57:53,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 159 transitions. [2020-10-12 09:57:53,208 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 159 transitions. Word has length 148 [2020-10-12 09:57:53,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:57:53,208 INFO L479 AbstractCegarLoop]: Abstraction has 156 states and 159 transitions. [2020-10-12 09:57:53,208 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-12 09:57:53,209 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 159 transitions. [2020-10-12 09:57:53,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2020-10-12 09:57:53,209 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:57:53,209 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:57:53,210 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-12 09:57:53,210 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:57:53,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:57:53,210 INFO L82 PathProgramCache]: Analyzing trace with hash -796330456, now seen corresponding path program 27 times [2020-10-12 09:57:53,210 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:57:53,210 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1798955176] [2020-10-12 09:57:53,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:57:53,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:57:53,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:57:53,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:57:58,249 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:57:58,249 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 165 [2020-10-12 09:57:58,250 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 09:57:58,250 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5025 [2020-10-12 09:57:58,250 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:57:58,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-12 09:57:58,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 37 [2020-10-12 09:57:58,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-12 09:57:58,250 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:57:58,709 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:57:58,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:57:58,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:57:58,712 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:57:58,712 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:57:58,712 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:57:58,713 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:57:58,713 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:57:58,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:57:58,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:57:58,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:57:58,713 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:57:58,714 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2020-10-12 09:57:58,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:57:58,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:57:58,716 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:57:58,716 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:57:58,716 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:57:58,716 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 09:57:58,716 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:57:58,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:57:58,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 09:57:58,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:57:58,717 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:57:58,717 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2020-10-12 09:57:58,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:57:58,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:57:58,719 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:57:58,719 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:57:58,719 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:57:58,719 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 09:57:58,720 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:57:58,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:57:58,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 09:57:58,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:57:58,720 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:57:58,731 INFO L134 CoverageAnalysis]: Checked inductivity of 1468 backedges. 4 proven. 576 refuted. 0 times theorem prover too weak. 888 trivial. 0 not checked. [2020-10-12 09:57:58,731 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1798955176] [2020-10-12 09:57:58,732 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:57:58,732 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-12 09:57:58,732 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714890331] [2020-10-12 09:57:58,732 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-12 09:57:58,732 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:57:58,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-12 09:57:58,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-12 09:57:58,733 INFO L87 Difference]: Start difference. First operand 156 states and 159 transitions. Second operand 28 states. [2020-10-12 09:57:59,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:57:59,131 INFO L93 Difference]: Finished difference Result 288 states and 296 transitions. [2020-10-12 09:57:59,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-12 09:57:59,132 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 153 [2020-10-12 09:57:59,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:57:59,134 INFO L225 Difference]: With dead ends: 288 [2020-10-12 09:57:59,134 INFO L226 Difference]: Without dead ends: 163 [2020-10-12 09:57:59,136 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-12 09:57:59,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-10-12 09:57:59,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 161. [2020-10-12 09:57:59,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-10-12 09:57:59,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 164 transitions. [2020-10-12 09:57:59,174 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 164 transitions. Word has length 153 [2020-10-12 09:57:59,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:57:59,175 INFO L479 AbstractCegarLoop]: Abstraction has 161 states and 164 transitions. [2020-10-12 09:57:59,175 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-12 09:57:59,175 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 164 transitions. [2020-10-12 09:57:59,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2020-10-12 09:57:59,176 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:57:59,176 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 25, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:57:59,176 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-12 09:57:59,176 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:57:59,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:57:59,177 INFO L82 PathProgramCache]: Analyzing trace with hash -1830056216, now seen corresponding path program 28 times [2020-10-12 09:57:59,177 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:57:59,177 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1317008721] [2020-10-12 09:57:59,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:57:59,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:57:59,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:57:59,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:58:03,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:58:04,256 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:58:04,257 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 170 [2020-10-12 09:58:04,257 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 09:58:04,257 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5059 [2020-10-12 09:58:04,257 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:58:04,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-12 09:58:04,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 38 [2020-10-12 09:58:04,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-12 09:58:04,258 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:58:04,762 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:58:04,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:58:04,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:58:04,765 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:58:04,765 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:58:04,766 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:58:04,766 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:58:04,766 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:58:04,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:58:04,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:58:04,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:58:04,766 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:58:04,767 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 138 [2020-10-12 09:58:04,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:58:04,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:58:04,769 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:58:04,769 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:58:04,769 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:58:04,769 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 09:58:04,770 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:58:04,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:58:04,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 09:58:04,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:58:04,770 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:58:04,771 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2020-10-12 09:58:04,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:58:04,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:58:04,772 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:58:04,773 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:58:04,773 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:58:04,773 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 09:58:04,773 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:58:04,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:58:04,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 09:58:04,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:58:04,773 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:58:04,786 INFO L134 CoverageAnalysis]: Checked inductivity of 1591 backedges. 4 proven. 625 refuted. 0 times theorem prover too weak. 962 trivial. 0 not checked. [2020-10-12 09:58:04,786 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1317008721] [2020-10-12 09:58:04,786 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:58:04,786 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-12 09:58:04,787 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222374315] [2020-10-12 09:58:04,787 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-12 09:58:04,787 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:58:04,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-12 09:58:04,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-12 09:58:04,788 INFO L87 Difference]: Start difference. First operand 161 states and 164 transitions. Second operand 29 states. [2020-10-12 09:58:05,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:58:05,319 INFO L93 Difference]: Finished difference Result 297 states and 305 transitions. [2020-10-12 09:58:05,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-12 09:58:05,320 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 158 [2020-10-12 09:58:05,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:58:05,322 INFO L225 Difference]: With dead ends: 297 [2020-10-12 09:58:05,322 INFO L226 Difference]: Without dead ends: 168 [2020-10-12 09:58:05,323 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-12 09:58:05,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2020-10-12 09:58:05,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 166. [2020-10-12 09:58:05,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-10-12 09:58:05,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 169 transitions. [2020-10-12 09:58:05,380 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 169 transitions. Word has length 158 [2020-10-12 09:58:05,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:58:05,381 INFO L479 AbstractCegarLoop]: Abstraction has 166 states and 169 transitions. [2020-10-12 09:58:05,381 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-12 09:58:05,381 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 169 transitions. [2020-10-12 09:58:05,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2020-10-12 09:58:05,383 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:58:05,383 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 26, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:58:05,383 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-12 09:58:05,383 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:58:05,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:58:05,384 INFO L82 PathProgramCache]: Analyzing trace with hash 1300911136, now seen corresponding path program 29 times [2020-10-12 09:58:05,384 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:58:05,384 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1590419114] [2020-10-12 09:58:05,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:58:05,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:58:05,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:58:05,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:58:10,486 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:58:10,486 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 175 [2020-10-12 09:58:10,486 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 09:58:10,486 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5078 [2020-10-12 09:58:10,486 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:58:10,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-12 09:58:10,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:58:10,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-12 09:58:10,487 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:58:11,018 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:58:11,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:58:11,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:58:11,022 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:58:11,022 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:58:11,023 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:58:11,023 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:58:11,023 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:58:11,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:58:11,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:58:11,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:58:11,024 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:58:11,025 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2020-10-12 09:58:11,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:58:11,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:58:11,027 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:58:11,028 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:58:11,028 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:58:11,028 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:58:11,028 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:58:11,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:58:11,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 09:58:11,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:58:11,029 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:58:11,030 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 151 [2020-10-12 09:58:11,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:58:11,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:58:11,033 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:58:11,033 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:58:11,034 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:58:11,034 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:58:11,034 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:58:11,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:58:11,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 09:58:11,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:58:11,035 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:58:11,048 INFO L134 CoverageAnalysis]: Checked inductivity of 1719 backedges. 4 proven. 351 refuted. 0 times theorem prover too weak. 1364 trivial. 0 not checked. [2020-10-12 09:58:11,049 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1590419114] [2020-10-12 09:58:11,049 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:58:11,049 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-12 09:58:11,049 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355302800] [2020-10-12 09:58:11,049 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-12 09:58:11,050 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:58:11,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-12 09:58:11,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-12 09:58:11,050 INFO L87 Difference]: Start difference. First operand 166 states and 169 transitions. Second operand 30 states. [2020-10-12 09:58:11,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:58:11,535 INFO L93 Difference]: Finished difference Result 306 states and 314 transitions. [2020-10-12 09:58:11,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-12 09:58:11,536 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 163 [2020-10-12 09:58:11,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:58:11,538 INFO L225 Difference]: With dead ends: 306 [2020-10-12 09:58:11,538 INFO L226 Difference]: Without dead ends: 173 [2020-10-12 09:58:11,539 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-12 09:58:11,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2020-10-12 09:58:11,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 171. [2020-10-12 09:58:11,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2020-10-12 09:58:11,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 174 transitions. [2020-10-12 09:58:11,581 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 174 transitions. Word has length 163 [2020-10-12 09:58:11,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:58:11,582 INFO L479 AbstractCegarLoop]: Abstraction has 171 states and 174 transitions. [2020-10-12 09:58:11,582 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-12 09:58:11,582 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 174 transitions. [2020-10-12 09:58:11,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2020-10-12 09:58:11,583 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:58:11,583 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 27, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:58:11,584 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-12 09:58:11,584 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:58:11,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:58:11,584 INFO L82 PathProgramCache]: Analyzing trace with hash -820372512, now seen corresponding path program 30 times [2020-10-12 09:58:11,584 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:58:11,585 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1042906069] [2020-10-12 09:58:11,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:58:11,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:58:11,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:58:11,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:58:16,696 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:58:16,697 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 180 [2020-10-12 09:58:16,697 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 09:58:16,697 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5090 [2020-10-12 09:58:16,697 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:58:16,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-12 09:58:16,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:58:16,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-12 09:58:16,698 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:58:17,256 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:58:17,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:58:17,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:58:17,259 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:58:17,260 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:58:17,260 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:58:17,260 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:58:17,260 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:58:17,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:58:17,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:58:17,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:58:17,260 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:58:17,261 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2020-10-12 09:58:17,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:58:17,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:58:17,263 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:58:17,263 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:58:17,263 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:58:17,264 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 09:58:17,264 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:58:17,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:58:17,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 09:58:17,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:58:17,264 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:58:17,265 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 156 [2020-10-12 09:58:17,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:58:17,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:58:17,267 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:58:17,268 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:58:17,268 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:58:17,268 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:58:17,268 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:58:17,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:58:17,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 09:58:17,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:58:17,268 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:58:17,280 INFO L134 CoverageAnalysis]: Checked inductivity of 1852 backedges. 4 proven. 378 refuted. 0 times theorem prover too weak. 1470 trivial. 0 not checked. [2020-10-12 09:58:17,280 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1042906069] [2020-10-12 09:58:17,280 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:58:17,281 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-12 09:58:17,281 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652075081] [2020-10-12 09:58:17,281 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-12 09:58:17,281 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:58:17,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-12 09:58:17,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-12 09:58:17,282 INFO L87 Difference]: Start difference. First operand 171 states and 174 transitions. Second operand 31 states. [2020-10-12 09:58:17,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:58:17,803 INFO L93 Difference]: Finished difference Result 315 states and 323 transitions. [2020-10-12 09:58:17,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-12 09:58:17,804 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 168 [2020-10-12 09:58:17,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:58:17,805 INFO L225 Difference]: With dead ends: 315 [2020-10-12 09:58:17,806 INFO L226 Difference]: Without dead ends: 178 [2020-10-12 09:58:17,807 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-12 09:58:17,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2020-10-12 09:58:17,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 176. [2020-10-12 09:58:17,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2020-10-12 09:58:17,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 179 transitions. [2020-10-12 09:58:17,840 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 179 transitions. Word has length 168 [2020-10-12 09:58:17,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:58:17,841 INFO L479 AbstractCegarLoop]: Abstraction has 176 states and 179 transitions. [2020-10-12 09:58:17,841 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-12 09:58:17,841 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 179 transitions. [2020-10-12 09:58:17,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2020-10-12 09:58:17,842 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:58:17,842 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 28, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:58:17,843 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-12 09:58:17,843 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:58:17,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:58:17,843 INFO L82 PathProgramCache]: Analyzing trace with hash 1184848408, now seen corresponding path program 31 times [2020-10-12 09:58:17,843 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:58:17,844 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [206779505] [2020-10-12 09:58:17,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:58:17,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:58:17,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:58:18,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:58:22,870 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:58:22,871 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 185 [2020-10-12 09:58:22,871 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 09:58:22,871 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-12 09:58:22,871 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:58:22,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-12 09:58:22,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 41 [2020-10-12 09:58:22,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-12 09:58:22,871 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:58:23,522 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:58:23,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:58:23,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:58:23,525 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:58:23,525 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:58:23,525 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:58:23,525 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:58:23,526 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:58:23,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:58:23,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:58:23,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:58:23,526 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:58:23,528 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2020-10-12 09:58:23,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:58:23,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:58:23,531 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:58:23,531 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:58:23,531 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:58:23,531 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:58:23,532 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:58:23,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:58:23,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 09:58:23,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:58:23,532 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:58:23,533 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 161 [2020-10-12 09:58:23,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:58:23,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:58:23,536 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:58:23,537 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:58:23,537 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:58:23,537 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:58:23,537 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:58:23,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:58:23,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 09:58:23,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:58:23,538 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:58:23,558 INFO L134 CoverageAnalysis]: Checked inductivity of 1990 backedges. 4 proven. 784 refuted. 0 times theorem prover too weak. 1202 trivial. 0 not checked. [2020-10-12 09:58:23,558 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [206779505] [2020-10-12 09:58:23,558 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:58:23,558 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-12 09:58:23,558 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281240704] [2020-10-12 09:58:23,559 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-12 09:58:23,559 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:58:23,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-12 09:58:23,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-12 09:58:23,560 INFO L87 Difference]: Start difference. First operand 176 states and 179 transitions. Second operand 32 states. [2020-10-12 09:58:24,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:58:24,191 INFO L93 Difference]: Finished difference Result 324 states and 332 transitions. [2020-10-12 09:58:24,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-12 09:58:24,192 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 173 [2020-10-12 09:58:24,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:58:24,193 INFO L225 Difference]: With dead ends: 324 [2020-10-12 09:58:24,194 INFO L226 Difference]: Without dead ends: 183 [2020-10-12 09:58:24,195 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-12 09:58:24,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2020-10-12 09:58:24,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 181. [2020-10-12 09:58:24,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2020-10-12 09:58:24,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 184 transitions. [2020-10-12 09:58:24,238 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 184 transitions. Word has length 173 [2020-10-12 09:58:24,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:58:24,239 INFO L479 AbstractCegarLoop]: Abstraction has 181 states and 184 transitions. [2020-10-12 09:58:24,239 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-12 09:58:24,239 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 184 transitions. [2020-10-12 09:58:24,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2020-10-12 09:58:24,240 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:58:24,240 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 29, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:58:24,240 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-12 09:58:24,240 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:58:24,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:58:24,241 INFO L82 PathProgramCache]: Analyzing trace with hash -1505324840, now seen corresponding path program 32 times [2020-10-12 09:58:24,241 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:58:24,241 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [593729352] [2020-10-12 09:58:24,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:58:24,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:58:24,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:58:24,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:58:24,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:58:29,736 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:58:29,736 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 190 [2020-10-12 09:58:29,736 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 09:58:29,736 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5471 [2020-10-12 09:58:29,736 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:58:29,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-12 09:58:29,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:58:29,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-12 09:58:29,737 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:58:30,392 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:58:30,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:58:30,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:58:30,395 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:58:30,396 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:58:30,396 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:58:30,396 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:58:30,396 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:58:30,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:58:30,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:58:30,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:58:30,397 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:58:30,397 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 158 [2020-10-12 09:58:30,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:58:30,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:58:30,399 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:58:30,399 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:58:30,400 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:58:30,400 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 09:58:30,400 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:58:30,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:58:30,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 09:58:30,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:58:30,400 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:58:30,401 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 166 [2020-10-12 09:58:30,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:58:30,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:58:30,403 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:58:30,403 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:58:30,403 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:58:30,403 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 09:58:30,403 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:58:30,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:58:30,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 09:58:30,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:58:30,404 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:58:30,417 INFO L134 CoverageAnalysis]: Checked inductivity of 2133 backedges. 4 proven. 435 refuted. 0 times theorem prover too weak. 1694 trivial. 0 not checked. [2020-10-12 09:58:30,417 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [593729352] [2020-10-12 09:58:30,417 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:58:30,418 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-12 09:58:30,418 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784178229] [2020-10-12 09:58:30,418 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-12 09:58:30,419 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:58:30,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-12 09:58:30,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-12 09:58:30,420 INFO L87 Difference]: Start difference. First operand 181 states and 184 transitions. Second operand 33 states. [2020-10-12 09:58:31,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:58:31,053 INFO L93 Difference]: Finished difference Result 333 states and 341 transitions. [2020-10-12 09:58:31,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-12 09:58:31,054 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 178 [2020-10-12 09:58:31,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:58:31,055 INFO L225 Difference]: With dead ends: 333 [2020-10-12 09:58:31,056 INFO L226 Difference]: Without dead ends: 188 [2020-10-12 09:58:31,057 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-12 09:58:31,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2020-10-12 09:58:31,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 186. [2020-10-12 09:58:31,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2020-10-12 09:58:31,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 189 transitions. [2020-10-12 09:58:31,094 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 189 transitions. Word has length 178 [2020-10-12 09:58:31,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:58:31,095 INFO L479 AbstractCegarLoop]: Abstraction has 186 states and 189 transitions. [2020-10-12 09:58:31,095 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-12 09:58:31,095 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 189 transitions. [2020-10-12 09:58:31,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2020-10-12 09:58:31,096 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:58:31,096 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 30, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:58:31,097 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-12 09:58:31,097 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:58:31,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:58:31,097 INFO L82 PathProgramCache]: Analyzing trace with hash -746059760, now seen corresponding path program 33 times [2020-10-12 09:58:31,098 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:58:31,098 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1811738792] [2020-10-12 09:58:31,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:58:31,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:58:31,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:58:31,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:58:36,279 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:58:36,279 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 195 [2020-10-12 09:58:36,280 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 09:58:36,280 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5156 [2020-10-12 09:58:36,280 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:58:36,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-12 09:58:36,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-10-12 09:58:36,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-12 09:58:36,280 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:58:36,979 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:58:36,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:58:36,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:58:36,982 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:58:36,982 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:58:36,983 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:58:36,983 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:58:36,983 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:58:36,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:58:36,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:58:36,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:58:36,984 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:58:36,984 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 163 [2020-10-12 09:58:36,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:58:36,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:58:36,987 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:58:36,987 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:58:36,988 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:58:36,988 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:58:36,988 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:58:36,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:58:36,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 09:58:36,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:58:36,989 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:58:36,990 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 171 [2020-10-12 09:58:36,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:58:36,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:58:36,992 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:58:36,992 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:58:36,993 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:58:36,993 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:58:36,993 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:58:36,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:58:36,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 09:58:36,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:58:36,993 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:58:37,009 INFO L134 CoverageAnalysis]: Checked inductivity of 2281 backedges. 4 proven. 900 refuted. 0 times theorem prover too weak. 1377 trivial. 0 not checked. [2020-10-12 09:58:37,009 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1811738792] [2020-10-12 09:58:37,009 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:58:37,009 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-12 09:58:37,009 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673997971] [2020-10-12 09:58:37,010 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-12 09:58:37,010 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:58:37,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-12 09:58:37,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-12 09:58:37,011 INFO L87 Difference]: Start difference. First operand 186 states and 189 transitions. Second operand 34 states. [2020-10-12 09:58:37,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:58:37,663 INFO L93 Difference]: Finished difference Result 342 states and 350 transitions. [2020-10-12 09:58:37,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-12 09:58:37,664 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 183 [2020-10-12 09:58:37,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:58:37,666 INFO L225 Difference]: With dead ends: 342 [2020-10-12 09:58:37,666 INFO L226 Difference]: Without dead ends: 193 [2020-10-12 09:58:37,667 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-12 09:58:37,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2020-10-12 09:58:37,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 191. [2020-10-12 09:58:37,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2020-10-12 09:58:37,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 194 transitions. [2020-10-12 09:58:37,719 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 194 transitions. Word has length 183 [2020-10-12 09:58:37,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:58:37,720 INFO L479 AbstractCegarLoop]: Abstraction has 191 states and 194 transitions. [2020-10-12 09:58:37,720 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-12 09:58:37,720 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 194 transitions. [2020-10-12 09:58:37,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2020-10-12 09:58:37,722 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:58:37,722 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 31, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:58:37,722 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-12 09:58:37,722 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:58:37,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:58:37,723 INFO L82 PathProgramCache]: Analyzing trace with hash -1553928752, now seen corresponding path program 34 times [2020-10-12 09:58:37,723 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:58:37,723 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [209989888] [2020-10-12 09:58:37,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:58:37,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:58:37,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:58:38,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:58:38,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:58:43,134 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:58:43,134 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 200 [2020-10-12 09:58:43,134 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 09:58:43,134 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5384 [2020-10-12 09:58:43,134 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:58:43,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-12 09:58:43,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:58:43,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-12 09:58:43,135 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:58:43,912 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:58:43,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:58:43,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:58:43,916 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:58:43,916 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:58:43,916 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:58:43,917 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:58:43,917 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:58:43,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:58:43,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:58:43,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:58:43,917 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:58:43,918 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 168 [2020-10-12 09:58:43,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:58:43,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:58:43,920 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:58:43,920 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:58:43,920 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:58:43,920 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:58:43,921 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:58:43,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:58:43,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 09:58:43,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:58:43,921 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:58:43,922 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 176 [2020-10-12 09:58:43,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:58:43,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:58:43,923 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:58:43,924 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:58:43,924 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:58:43,924 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 09:58:43,924 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:58:43,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:58:43,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 09:58:43,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:58:43,925 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:58:43,939 INFO L134 CoverageAnalysis]: Checked inductivity of 2434 backedges. 4 proven. 496 refuted. 0 times theorem prover too weak. 1934 trivial. 0 not checked. [2020-10-12 09:58:43,939 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [209989888] [2020-10-12 09:58:43,940 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:58:43,940 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-12 09:58:43,940 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894312653] [2020-10-12 09:58:43,940 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-12 09:58:43,941 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:58:43,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-12 09:58:43,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-12 09:58:43,941 INFO L87 Difference]: Start difference. First operand 191 states and 194 transitions. Second operand 35 states. [2020-10-12 09:58:44,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:58:44,601 INFO L93 Difference]: Finished difference Result 351 states and 359 transitions. [2020-10-12 09:58:44,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-12 09:58:44,602 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 188 [2020-10-12 09:58:44,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:58:44,603 INFO L225 Difference]: With dead ends: 351 [2020-10-12 09:58:44,604 INFO L226 Difference]: Without dead ends: 198 [2020-10-12 09:58:44,605 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-12 09:58:44,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2020-10-12 09:58:44,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 196. [2020-10-12 09:58:44,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2020-10-12 09:58:44,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 199 transitions. [2020-10-12 09:58:44,642 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 199 transitions. Word has length 188 [2020-10-12 09:58:44,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:58:44,643 INFO L479 AbstractCegarLoop]: Abstraction has 196 states and 199 transitions. [2020-10-12 09:58:44,643 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-12 09:58:44,643 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 199 transitions. [2020-10-12 09:58:44,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2020-10-12 09:58:44,644 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:58:44,644 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 32, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:58:44,645 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-12 09:58:44,645 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:58:44,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:58:44,645 INFO L82 PathProgramCache]: Analyzing trace with hash -1576772088, now seen corresponding path program 35 times [2020-10-12 09:58:44,645 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:58:44,646 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [205174605] [2020-10-12 09:58:44,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:58:44,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:58:44,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:58:44,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:58:50,151 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:58:50,151 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 205 [2020-10-12 09:58:50,151 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 09:58:50,152 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5483 [2020-10-12 09:58:50,152 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:58:50,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-12 09:58:50,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:58:50,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-12 09:58:50,152 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:58:50,913 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:58:50,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:58:50,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:58:50,916 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:58:50,916 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:58:50,916 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:58:50,916 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:58:50,916 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:58:50,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:58:50,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:58:50,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:58:50,917 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:58:50,917 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 173 [2020-10-12 09:58:50,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:58:50,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:58:50,919 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:58:50,919 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:58:50,919 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:58:50,919 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 09:58:50,919 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:58:50,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:58:50,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 09:58:50,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:58:50,920 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:58:50,920 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 181 [2020-10-12 09:58:50,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:58:50,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:58:50,921 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:58:50,922 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:58:50,922 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:58:50,922 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 09:58:50,922 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:58:50,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:58:50,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 09:58:50,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:58:50,922 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:58:50,949 INFO L134 CoverageAnalysis]: Checked inductivity of 2592 backedges. 4 proven. 528 refuted. 0 times theorem prover too weak. 2060 trivial. 0 not checked. [2020-10-12 09:58:50,949 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [205174605] [2020-10-12 09:58:50,950 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:58:50,950 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-12 09:58:50,950 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011007157] [2020-10-12 09:58:50,950 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-12 09:58:50,951 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:58:50,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-12 09:58:50,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-12 09:58:50,951 INFO L87 Difference]: Start difference. First operand 196 states and 199 transitions. Second operand 36 states. [2020-10-12 09:58:51,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:58:51,511 INFO L93 Difference]: Finished difference Result 360 states and 368 transitions. [2020-10-12 09:58:51,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-12 09:58:51,512 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 193 [2020-10-12 09:58:51,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:58:51,513 INFO L225 Difference]: With dead ends: 360 [2020-10-12 09:58:51,514 INFO L226 Difference]: Without dead ends: 203 [2020-10-12 09:58:51,515 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-12 09:58:51,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2020-10-12 09:58:51,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 201. [2020-10-12 09:58:51,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 201 states. [2020-10-12 09:58:51,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 204 transitions. [2020-10-12 09:58:51,549 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 204 transitions. Word has length 193 [2020-10-12 09:58:51,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:58:51,550 INFO L479 AbstractCegarLoop]: Abstraction has 201 states and 204 transitions. [2020-10-12 09:58:51,550 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-12 09:58:51,550 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 204 transitions. [2020-10-12 09:58:51,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2020-10-12 09:58:51,551 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:58:51,551 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 33, 33, 33, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:58:51,551 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-12 09:58:51,551 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:58:51,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:58:51,552 INFO L82 PathProgramCache]: Analyzing trace with hash -1420217656, now seen corresponding path program 36 times [2020-10-12 09:58:51,552 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:58:51,552 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1144930455] [2020-10-12 09:58:51,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:58:51,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:58:51,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:58:51,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:58:56,604 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:58:56,605 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 210 [2020-10-12 09:58:56,605 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 09:58:56,605 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5038 [2020-10-12 09:58:56,605 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:58:56,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-12 09:58:56,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:58:56,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-12 09:58:56,605 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:58:57,442 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:58:57,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:58:57,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:58:57,445 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:58:57,445 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:58:57,445 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:58:57,446 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:58:57,446 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:58:57,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:58:57,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:58:57,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:58:57,447 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:58:57,447 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 178 [2020-10-12 09:58:57,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:58:57,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:58:57,450 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:58:57,450 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:58:57,450 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:58:57,450 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:58:57,450 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:58:57,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:58:57,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 09:58:57,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:58:57,451 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:58:57,451 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 186 [2020-10-12 09:58:57,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:58:57,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:58:57,453 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:58:57,453 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:58:57,453 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:58:57,454 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 09:58:57,454 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:58:57,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:58:57,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 09:58:57,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:58:57,454 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:58:57,470 INFO L134 CoverageAnalysis]: Checked inductivity of 2755 backedges. 4 proven. 561 refuted. 0 times theorem prover too weak. 2190 trivial. 0 not checked. [2020-10-12 09:58:57,470 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1144930455] [2020-10-12 09:58:57,471 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:58:57,471 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-12 09:58:57,471 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344976706] [2020-10-12 09:58:57,471 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-12 09:58:57,471 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:58:57,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-12 09:58:57,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-12 09:58:57,473 INFO L87 Difference]: Start difference. First operand 201 states and 204 transitions. Second operand 37 states.