/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=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.2 --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/loops-crafted-1/in-de61.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-14 23:58:50,580 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-14 23:58:50,582 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-14 23:58:50,606 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-14 23:58:50,606 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-14 23:58:50,607 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-14 23:58:50,608 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-14 23:58:50,610 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-14 23:58:50,611 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-14 23:58:50,612 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-14 23:58:50,613 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-14 23:58:50,614 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-14 23:58:50,614 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-14 23:58:50,615 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-14 23:58:50,616 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-14 23:58:50,617 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-14 23:58:50,620 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-14 23:58:50,621 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-14 23:58:50,627 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-14 23:58:50,628 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-14 23:58:50,630 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-14 23:58:50,631 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-14 23:58:50,632 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-14 23:58:50,633 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-14 23:58:50,635 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-14 23:58:50,635 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-14 23:58:50,635 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-14 23:58:50,636 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-14 23:58:50,637 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-14 23:58:50,637 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-14 23:58:50,638 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-14 23:58:50,638 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-14 23:58:50,639 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-14 23:58:50,640 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-14 23:58:50,641 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-14 23:58:50,641 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-14 23:58:50,641 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-14 23:58:50,642 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-14 23:58:50,642 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-14 23:58:50,643 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-14 23:58:50,643 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-14 23:58:50,644 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 [2020-10-14 23:58:50,666 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-14 23:58:50,666 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-14 23:58:50,667 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-14 23:58:50,667 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-14 23:58:50,667 INFO L138 SettingsManager]: * Use SBE=true [2020-10-14 23:58:50,668 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-14 23:58:50,668 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-14 23:58:50,668 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-14 23:58:50,668 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-14 23:58:50,668 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-14 23:58:50,669 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-14 23:58:50,669 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-14 23:58:50,669 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-14 23:58:50,669 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-14 23:58:50,669 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-14 23:58:50,669 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-14 23:58:50,670 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-14 23:58:50,670 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-14 23:58:50,670 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-14 23:58:50,670 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-14 23:58:50,670 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-14 23:58:50,671 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 23:58:50,671 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-14 23:58:50,671 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-14 23:58:50,671 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-14 23:58:50,671 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-14 23:58:50,672 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-14 23:58:50,672 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-14 23:58:50,672 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-14 23:58:50,672 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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; [2020-10-14 23:58:50,995 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-14 23:58:51,005 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-14 23:58:51,008 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-14 23:58:51,010 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-14 23:58:51,010 INFO L275 PluginConnector]: CDTParser initialized [2020-10-14 23:58:51,011 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/in-de61.c [2020-10-14 23:58:51,069 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/39294250f/5e599d87edfa4873afdc4dbb7ffcf2c2/FLAG174abf2f1 [2020-10-14 23:58:51,466 INFO L306 CDTParser]: Found 1 translation units. [2020-10-14 23:58:51,467 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops-crafted-1/in-de61.c [2020-10-14 23:58:51,473 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/39294250f/5e599d87edfa4873afdc4dbb7ffcf2c2/FLAG174abf2f1 [2020-10-14 23:58:51,846 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/39294250f/5e599d87edfa4873afdc4dbb7ffcf2c2 [2020-10-14 23:58:51,857 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-14 23:58:51,860 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-14 23:58:51,863 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-14 23:58:51,863 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-14 23:58:51,867 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-14 23:58:51,868 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:58:51" (1/1) ... [2020-10-14 23:58:51,871 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@42c12cd4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:58:51, skipping insertion in model container [2020-10-14 23:58:51,871 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:58:51" (1/1) ... [2020-10-14 23:58:51,880 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-14 23:58:51,902 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-14 23:58:52,107 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 23:58:52,111 INFO L203 MainTranslator]: Completed pre-run [2020-10-14 23:58:52,129 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 23:58:52,143 INFO L208 MainTranslator]: Completed translation [2020-10-14 23:58:52,144 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:58:52 WrapperNode [2020-10-14 23:58:52,144 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-14 23:58:52,145 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-14 23:58:52,145 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-14 23:58:52,145 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-14 23:58:52,158 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:58:52" (1/1) ... [2020-10-14 23:58:52,158 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:58:52" (1/1) ... [2020-10-14 23:58:52,246 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:58:52" (1/1) ... [2020-10-14 23:58:52,246 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:58:52" (1/1) ... [2020-10-14 23:58:52,251 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:58:52" (1/1) ... [2020-10-14 23:58:52,257 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:58:52" (1/1) ... [2020-10-14 23:58:52,258 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:58:52" (1/1) ... [2020-10-14 23:58:52,260 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-14 23:58:52,261 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-14 23:58:52,261 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-14 23:58:52,261 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-14 23:58:52,262 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:58:52" (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 [2020-10-14 23:58:52,324 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-14 23:58:52,324 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-14 23:58:52,324 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-14 23:58:52,325 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-14 23:58:52,325 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-14 23:58:52,325 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-10-14 23:58:52,325 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-14 23:58:52,325 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-14 23:58:52,325 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-14 23:58:52,326 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-14 23:58:52,533 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-14 23:58:52,533 INFO L295 CfgBuilder]: Removed 6 assume(true) statements. [2020-10-14 23:58:52,537 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:58:52 BoogieIcfgContainer [2020-10-14 23:58:52,537 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-14 23:58:52,538 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-14 23:58:52,538 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-14 23:58:52,541 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-14 23:58:52,542 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 11:58:51" (1/3) ... [2020-10-14 23:58:52,543 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33f40eb2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:58:52, skipping insertion in model container [2020-10-14 23:58:52,543 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:58:52" (2/3) ... [2020-10-14 23:58:52,543 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33f40eb2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:58:52, skipping insertion in model container [2020-10-14 23:58:52,543 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:58:52" (3/3) ... [2020-10-14 23:58:52,545 INFO L109 eAbstractionObserver]: Analyzing ICFG in-de61.c [2020-10-14 23:58:52,555 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-14 23:58:52,562 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-14 23:58:52,574 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-14 23:58:52,597 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-14 23:58:52,597 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-14 23:58:52,597 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-14 23:58:52,597 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-14 23:58:52,597 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-14 23:58:52,598 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-14 23:58:52,598 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-14 23:58:52,598 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-14 23:58:52,615 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2020-10-14 23:58:52,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-14 23:58:52,621 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:58:52,622 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:58:52,622 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:58:52,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:58:52,628 INFO L82 PathProgramCache]: Analyzing trace with hash -858988731, now seen corresponding path program 1 times [2020-10-14 23:58:52,637 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:58:52,637 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2019926525] [2020-10-14 23:58:52,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:58:52,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:58:52,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:52,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:52,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:52,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:53,338 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:58:53,338 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-14 23:58:53,339 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 23:58:53,342 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 602 [2020-10-14 23:58:53,345 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:58:53,346 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:58:53,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-14 23:58:53,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:58:53,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-14 23:58:53,347 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-14 23:58:53,561 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:58:53,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:58:53,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:53,565 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:58:53,566 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:58:53,566 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:58:53,566 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 23:58:53,567 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:58:53,567 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:58:53,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:58:53,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:58:53,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:58:53,569 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-14 23:58:53,580 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:58:53,581 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2019926525] [2020-10-14 23:58:53,583 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 23:58:53,584 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-14 23:58:53,585 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721348267] [2020-10-14 23:58:53,590 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-14 23:58:53,591 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:58:53,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-14 23:58:53,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-14 23:58:53,622 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 7 states. [2020-10-14 23:59:02,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:59:02,302 INFO L93 Difference]: Finished difference Result 63 states and 108 transitions. [2020-10-14 23:59:02,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-14 23:59:02,305 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 16 [2020-10-14 23:59:02,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:59:02,315 INFO L225 Difference]: With dead ends: 63 [2020-10-14 23:59:02,316 INFO L226 Difference]: Without dead ends: 27 [2020-10-14 23:59:02,319 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-10-14 23:59:02,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-14 23:59:02,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 22. [2020-10-14 23:59:02,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-10-14 23:59:02,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 30 transitions. [2020-10-14 23:59:02,361 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 30 transitions. Word has length 16 [2020-10-14 23:59:02,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:59:02,362 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 30 transitions. [2020-10-14 23:59:02,362 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-14 23:59:02,362 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 30 transitions. [2020-10-14 23:59:02,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-14 23:59:02,363 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:59:02,363 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:59:02,363 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-14 23:59:02,364 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:59:02,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:59:02,364 INFO L82 PathProgramCache]: Analyzing trace with hash 795384167, now seen corresponding path program 1 times [2020-10-14 23:59:02,365 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:59:02,365 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1791306248] [2020-10-14 23:59:02,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:59:02,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:59:02,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:02,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:02,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:02,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:02,522 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:02,523 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-14 23:59:02,523 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 23:59:02,525 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 147 [2020-10-14 23:59:02,525 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:02,525 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:02,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 23:59:02,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:59:02,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-14 23:59:02,527 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:59:02,571 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:59:02,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:59:02,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:02,575 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:02,576 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:59:02,576 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:59:02,576 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 23:59:02,576 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:02,577 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:02,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:59:02,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:59:02,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:59:02,577 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:59:02,581 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:59:02,583 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1791306248] [2020-10-14 23:59:02,584 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 23:59:02,584 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-14 23:59:02,584 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066683131] [2020-10-14 23:59:02,587 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-14 23:59:02,587 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:59:02,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-14 23:59:02,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-14 23:59:02,589 INFO L87 Difference]: Start difference. First operand 22 states and 30 transitions. Second operand 3 states. [2020-10-14 23:59:02,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:59:02,631 INFO L93 Difference]: Finished difference Result 44 states and 64 transitions. [2020-10-14 23:59:02,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-14 23:59:02,632 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-10-14 23:59:02,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:59:02,633 INFO L225 Difference]: With dead ends: 44 [2020-10-14 23:59:02,634 INFO L226 Difference]: Without dead ends: 34 [2020-10-14 23:59:02,635 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-14 23:59:02,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-14 23:59:02,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2020-10-14 23:59:02,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-14 23:59:02,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 46 transitions. [2020-10-14 23:59:02,651 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 46 transitions. Word has length 17 [2020-10-14 23:59:02,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:59:02,652 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 46 transitions. [2020-10-14 23:59:02,652 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-14 23:59:02,653 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 46 transitions. [2020-10-14 23:59:02,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-14 23:59:02,656 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:59:02,656 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:59:02,656 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-14 23:59:02,656 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:59:02,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:59:02,657 INFO L82 PathProgramCache]: Analyzing trace with hash -2096754730, now seen corresponding path program 1 times [2020-10-14 23:59:02,657 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:59:02,657 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [433315924] [2020-10-14 23:59:02,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:59:02,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:59:02,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:02,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:02,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:02,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:02,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:02,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:02,958 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:02,958 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-14 23:59:02,958 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 23:59:02,958 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 289 [2020-10-14 23:59:02,959 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:02,959 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:02,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-14 23:59:02,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:59:02,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-14 23:59:02,960 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:59:03,069 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:59:03,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:59:03,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:03,072 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:03,072 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:59:03,073 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:59:03,073 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:59:03,073 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:03,073 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:03,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:59:03,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:59:03,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:59:03,074 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:59:03,077 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 23:59:03,077 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [433315924] [2020-10-14 23:59:03,077 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 23:59:03,078 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-14 23:59:03,078 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052503154] [2020-10-14 23:59:03,078 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-14 23:59:03,079 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:59:03,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-14 23:59:03,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-14 23:59:03,080 INFO L87 Difference]: Start difference. First operand 33 states and 46 transitions. Second operand 7 states. [2020-10-14 23:59:03,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:59:03,293 INFO L93 Difference]: Finished difference Result 50 states and 69 transitions. [2020-10-14 23:59:03,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-14 23:59:03,294 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 17 [2020-10-14 23:59:03,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:59:03,295 INFO L225 Difference]: With dead ends: 50 [2020-10-14 23:59:03,295 INFO L226 Difference]: Without dead ends: 33 [2020-10-14 23:59:03,296 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2020-10-14 23:59:03,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-10-14 23:59:03,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 30. [2020-10-14 23:59:03,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-14 23:59:03,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 41 transitions. [2020-10-14 23:59:03,304 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 41 transitions. Word has length 17 [2020-10-14 23:59:03,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:59:03,305 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 41 transitions. [2020-10-14 23:59:03,305 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-14 23:59:03,305 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 41 transitions. [2020-10-14 23:59:03,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-14 23:59:03,307 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:59:03,307 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:59:03,307 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-14 23:59:03,308 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:59:03,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:59:03,308 INFO L82 PathProgramCache]: Analyzing trace with hash 1475186496, now seen corresponding path program 1 times [2020-10-14 23:59:03,309 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:59:03,309 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [878450814] [2020-10-14 23:59:03,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:59:03,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:59:03,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:03,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:03,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:03,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:03,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:03,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:03,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:03,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:03,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:03,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:03,847 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:03,848 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-14 23:59:03,848 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-14 23:59:03,848 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 528 [2020-10-14 23:59:03,848 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:03,849 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:03,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 23:59:03,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:59:03,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-14 23:59:03,850 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:59:04,166 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:59:04,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:59:04,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:04,171 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:04,171 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:59:04,171 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:59:04,171 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:59:04,171 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:04,172 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:04,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:59:04,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:59:04,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:59:04,176 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-14 23:59:04,182 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:59:04,182 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [878450814] [2020-10-14 23:59:04,183 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:59:04,183 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-14 23:59:04,186 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569727310] [2020-10-14 23:59:04,187 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-14 23:59:04,187 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:59:04,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-14 23:59:04,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-10-14 23:59:04,188 INFO L87 Difference]: Start difference. First operand 30 states and 41 transitions. Second operand 9 states. [2020-10-14 23:59:06,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:59:06,554 INFO L93 Difference]: Finished difference Result 62 states and 91 transitions. [2020-10-14 23:59:06,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-14 23:59:06,555 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 18 [2020-10-14 23:59:06,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:59:06,556 INFO L225 Difference]: With dead ends: 62 [2020-10-14 23:59:06,556 INFO L226 Difference]: Without dead ends: 52 [2020-10-14 23:59:06,557 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-10-14 23:59:06,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-14 23:59:06,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 48. [2020-10-14 23:59:06,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-14 23:59:06,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 71 transitions. [2020-10-14 23:59:06,567 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 71 transitions. Word has length 18 [2020-10-14 23:59:06,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:59:06,567 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 71 transitions. [2020-10-14 23:59:06,567 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-14 23:59:06,568 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 71 transitions. [2020-10-14 23:59:06,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-14 23:59:06,569 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:59:06,569 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:59:06,569 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-14 23:59:06,569 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:59:06,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:59:06,570 INFO L82 PathProgramCache]: Analyzing trace with hash 248460032, now seen corresponding path program 1 times [2020-10-14 23:59:06,570 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:59:06,570 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2077003825] [2020-10-14 23:59:06,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:59:06,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:59:06,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:06,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:06,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:06,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:06,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:06,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:06,742 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:06,743 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-14 23:59:06,743 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 23:59:06,743 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 164 [2020-10-14 23:59:06,743 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:06,744 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:06,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 23:59:06,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:59:06,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-14 23:59:06,744 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:59:06,784 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:59:06,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:59:06,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:06,787 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:06,787 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:59:06,787 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:59:06,787 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:59:06,788 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:06,788 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:06,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:59:06,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:59:06,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:59:06,789 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:59:06,791 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 23:59:06,791 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2077003825] [2020-10-14 23:59:06,791 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:59:06,791 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-10-14 23:59:06,792 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275175156] [2020-10-14 23:59:06,792 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 23:59:06,792 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:59:06,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 23:59:06,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 23:59:06,793 INFO L87 Difference]: Start difference. First operand 48 states and 71 transitions. Second operand 4 states. [2020-10-14 23:59:06,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:59:06,838 INFO L93 Difference]: Finished difference Result 59 states and 84 transitions. [2020-10-14 23:59:06,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 23:59:06,840 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2020-10-14 23:59:06,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:59:06,841 INFO L225 Difference]: With dead ends: 59 [2020-10-14 23:59:06,841 INFO L226 Difference]: Without dead ends: 46 [2020-10-14 23:59:06,842 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 23:59:06,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-14 23:59:06,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 41. [2020-10-14 23:59:06,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-14 23:59:06,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 60 transitions. [2020-10-14 23:59:06,849 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 60 transitions. Word has length 18 [2020-10-14 23:59:06,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:59:06,849 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 60 transitions. [2020-10-14 23:59:06,850 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 23:59:06,850 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 60 transitions. [2020-10-14 23:59:06,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-14 23:59:06,851 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:59:06,851 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:59:06,851 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-14 23:59:06,852 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:59:06,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:59:06,852 INFO L82 PathProgramCache]: Analyzing trace with hash -1029509497, now seen corresponding path program 1 times [2020-10-14 23:59:06,853 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:59:06,853 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1199643839] [2020-10-14 23:59:06,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:59:06,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:59:06,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:06,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:06,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:06,989 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:06,990 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-14 23:59:06,990 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 23:59:06,990 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 130 [2020-10-14 23:59:06,991 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:06,991 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:06,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-14 23:59:06,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 23:59:06,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-14 23:59:06,992 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:59:07,048 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:59:07,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:59:07,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:07,051 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:07,052 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:59:07,052 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:59:07,052 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:59:07,053 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:07,053 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:07,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:59:07,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:59:07,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:59:07,054 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:59:07,056 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:59:07,057 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1199643839] [2020-10-14 23:59:07,057 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:59:07,057 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-14 23:59:07,057 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448765552] [2020-10-14 23:59:07,058 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 23:59:07,058 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:59:07,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 23:59:07,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-14 23:59:07,059 INFO L87 Difference]: Start difference. First operand 41 states and 60 transitions. Second operand 5 states. [2020-10-14 23:59:07,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:59:07,224 INFO L93 Difference]: Finished difference Result 71 states and 108 transitions. [2020-10-14 23:59:07,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-14 23:59:07,225 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2020-10-14 23:59:07,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:59:07,226 INFO L225 Difference]: With dead ends: 71 [2020-10-14 23:59:07,226 INFO L226 Difference]: Without dead ends: 51 [2020-10-14 23:59:07,227 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-14 23:59:07,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-14 23:59:07,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 40. [2020-10-14 23:59:07,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-14 23:59:07,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 58 transitions. [2020-10-14 23:59:07,234 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 58 transitions. Word has length 19 [2020-10-14 23:59:07,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:59:07,234 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 58 transitions. [2020-10-14 23:59:07,234 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 23:59:07,235 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 58 transitions. [2020-10-14 23:59:07,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-14 23:59:07,235 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:59:07,236 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:59:07,236 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-14 23:59:07,236 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:59:07,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:59:07,236 INFO L82 PathProgramCache]: Analyzing trace with hash 1626287656, now seen corresponding path program 1 times [2020-10-14 23:59:07,237 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:59:07,237 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1017861391] [2020-10-14 23:59:07,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:59:07,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:59:07,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:07,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:07,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:07,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:07,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:07,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:07,505 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:07,505 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-14 23:59:07,506 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 23:59:07,506 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 262 [2020-10-14 23:59:07,506 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:07,506 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:07,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 23:59:07,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:59:07,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-14 23:59:07,507 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:59:07,532 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:59:07,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:59:07,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:07,535 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:07,535 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:59:07,535 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:59:07,535 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:59:07,535 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:07,536 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:07,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:59:07,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:59:07,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:59:07,537 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:59:07,538 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:59:07,538 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1017861391] [2020-10-14 23:59:07,539 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:59:07,539 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-10-14 23:59:07,539 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239675531] [2020-10-14 23:59:07,540 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 23:59:07,540 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:59:07,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 23:59:07,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 23:59:07,541 INFO L87 Difference]: Start difference. First operand 40 states and 58 transitions. Second operand 4 states. [2020-10-14 23:59:07,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:59:07,590 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2020-10-14 23:59:07,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 23:59:07,590 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2020-10-14 23:59:07,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:59:07,591 INFO L225 Difference]: With dead ends: 59 [2020-10-14 23:59:07,592 INFO L226 Difference]: Without dead ends: 42 [2020-10-14 23:59:07,592 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 23:59:07,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-14 23:59:07,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2020-10-14 23:59:07,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-14 23:59:07,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 57 transitions. [2020-10-14 23:59:07,598 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 57 transitions. Word has length 19 [2020-10-14 23:59:07,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:59:07,599 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 57 transitions. [2020-10-14 23:59:07,599 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 23:59:07,599 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 57 transitions. [2020-10-14 23:59:07,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-14 23:59:07,600 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:59:07,600 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:59:07,600 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-14 23:59:07,600 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:59:07,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:59:07,601 INFO L82 PathProgramCache]: Analyzing trace with hash -1837594688, now seen corresponding path program 1 times [2020-10-14 23:59:07,601 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:59:07,601 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [535137426] [2020-10-14 23:59:07,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:59:07,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:59:07,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:07,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:07,646 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:07,647 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-14 23:59:07,647 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:59:07,647 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 37 [2020-10-14 23:59:07,648 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:07,648 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:07,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 23:59:07,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:59:07,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-14 23:59:07,649 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:59:07,676 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:59:07,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:59:07,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:07,678 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:07,679 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:59:07,679 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:59:07,679 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:59:07,679 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:07,680 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:07,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:59:07,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:59:07,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:59:07,681 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:59:07,683 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-14 23:59:07,684 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [535137426] [2020-10-14 23:59:07,684 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:59:07,684 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-10-14 23:59:07,685 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557820094] [2020-10-14 23:59:07,685 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 23:59:07,686 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:59:07,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 23:59:07,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 23:59:07,686 INFO L87 Difference]: Start difference. First operand 41 states and 57 transitions. Second operand 4 states. [2020-10-14 23:59:07,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:59:07,738 INFO L93 Difference]: Finished difference Result 82 states and 119 transitions. [2020-10-14 23:59:07,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 23:59:07,739 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2020-10-14 23:59:07,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:59:07,740 INFO L225 Difference]: With dead ends: 82 [2020-10-14 23:59:07,740 INFO L226 Difference]: Without dead ends: 70 [2020-10-14 23:59:07,741 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 23:59:07,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-14 23:59:07,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 49. [2020-10-14 23:59:07,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-14 23:59:07,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 68 transitions. [2020-10-14 23:59:07,748 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 68 transitions. Word has length 20 [2020-10-14 23:59:07,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:59:07,749 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 68 transitions. [2020-10-14 23:59:07,749 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 23:59:07,749 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 68 transitions. [2020-10-14 23:59:07,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-14 23:59:07,750 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:59:07,750 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:59:07,750 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-14 23:59:07,751 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:59:07,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:59:07,751 INFO L82 PathProgramCache]: Analyzing trace with hash -1023311903, now seen corresponding path program 2 times [2020-10-14 23:59:07,751 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:59:07,752 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1634191495] [2020-10-14 23:59:07,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:59:07,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:59:07,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:07,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:07,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:07,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:07,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:07,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:07,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:07,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:08,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:08,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:08,489 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:08,489 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-14 23:59:08,489 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-14 23:59:08,490 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 732 [2020-10-14 23:59:08,490 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:08,490 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:08,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-14 23:59:08,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:59:08,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-14 23:59:08,491 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:59:08,747 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:59:08,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:59:08,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:08,749 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:08,749 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:59:08,750 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:59:08,750 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:59:08,750 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:08,750 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:08,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:59:08,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:59:08,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:59:08,751 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:59:08,754 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:59:08,754 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1634191495] [2020-10-14 23:59:08,754 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:59:08,754 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-14 23:59:08,755 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146959709] [2020-10-14 23:59:08,755 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-14 23:59:08,756 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:59:08,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-14 23:59:08,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-14 23:59:08,756 INFO L87 Difference]: Start difference. First operand 49 states and 68 transitions. Second operand 11 states. [2020-10-14 23:59:12,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:59:12,306 INFO L93 Difference]: Finished difference Result 174 states and 276 transitions. [2020-10-14 23:59:12,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-14 23:59:12,315 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 20 [2020-10-14 23:59:12,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:59:12,316 INFO L225 Difference]: With dead ends: 174 [2020-10-14 23:59:12,317 INFO L226 Difference]: Without dead ends: 155 [2020-10-14 23:59:12,318 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=110, Invalid=592, Unknown=0, NotChecked=0, Total=702 [2020-10-14 23:59:12,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-10-14 23:59:12,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 104. [2020-10-14 23:59:12,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-14 23:59:12,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 151 transitions. [2020-10-14 23:59:12,328 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 151 transitions. Word has length 20 [2020-10-14 23:59:12,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:59:12,329 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 151 transitions. [2020-10-14 23:59:12,329 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-14 23:59:12,329 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 151 transitions. [2020-10-14 23:59:12,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-14 23:59:12,330 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:59:12,330 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:59:12,330 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-14 23:59:12,331 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:59:12,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:59:12,331 INFO L82 PathProgramCache]: Analyzing trace with hash -716359928, now seen corresponding path program 2 times [2020-10-14 23:59:12,331 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:59:12,332 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [339815697] [2020-10-14 23:59:12,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:59:12,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:59:12,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:12,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:12,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:12,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:12,665 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:12,665 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-14 23:59:12,665 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 23:59:12,666 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 326 [2020-10-14 23:59:12,666 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:12,666 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:12,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 23:59:12,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 23:59:12,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-14 23:59:12,667 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:59:12,712 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:59:12,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:59:12,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:12,714 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:12,714 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:59:12,714 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:59:12,714 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:59:12,715 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:12,715 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:12,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:59:12,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:59:12,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:59:12,716 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:59:12,717 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-14 23:59:12,718 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [339815697] [2020-10-14 23:59:12,718 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:59:12,718 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-14 23:59:12,718 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979887323] [2020-10-14 23:59:12,719 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 23:59:12,719 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:59:12,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 23:59:12,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-14 23:59:12,719 INFO L87 Difference]: Start difference. First operand 104 states and 151 transitions. Second operand 5 states. [2020-10-14 23:59:12,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:59:12,790 INFO L93 Difference]: Finished difference Result 185 states and 277 transitions. [2020-10-14 23:59:12,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 23:59:12,791 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 21 [2020-10-14 23:59:12,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:59:12,793 INFO L225 Difference]: With dead ends: 185 [2020-10-14 23:59:12,793 INFO L226 Difference]: Without dead ends: 160 [2020-10-14 23:59:12,793 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-14 23:59:12,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-10-14 23:59:12,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 110. [2020-10-14 23:59:12,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-14 23:59:12,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 159 transitions. [2020-10-14 23:59:12,803 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 159 transitions. Word has length 21 [2020-10-14 23:59:12,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:59:12,804 INFO L479 AbstractCegarLoop]: Abstraction has 110 states and 159 transitions. [2020-10-14 23:59:12,804 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 23:59:12,804 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 159 transitions. [2020-10-14 23:59:12,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-14 23:59:12,805 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:59:12,805 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:59:12,805 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-14 23:59:12,806 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:59:12,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:59:12,806 INFO L82 PathProgramCache]: Analyzing trace with hash -1622360121, now seen corresponding path program 3 times [2020-10-14 23:59:12,806 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:59:12,806 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [577668085] [2020-10-14 23:59:12,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:59:12,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:59:12,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:12,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:12,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:12,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:12,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:12,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:13,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:13,169 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:13,169 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-14 23:59:13,169 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 23:59:13,170 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 357 [2020-10-14 23:59:13,170 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:13,170 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:13,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-14 23:59:13,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:59:13,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-14 23:59:13,171 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:59:13,205 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:59:13,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:59:13,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:13,207 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:13,207 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:59:13,207 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:59:13,207 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:59:13,208 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:13,208 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:13,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:59:13,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:59:13,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:59:13,209 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:59:13,210 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:59:13,210 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [577668085] [2020-10-14 23:59:13,211 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:59:13,211 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-14 23:59:13,211 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838819705] [2020-10-14 23:59:13,212 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 23:59:13,212 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:59:13,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 23:59:13,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-14 23:59:13,213 INFO L87 Difference]: Start difference. First operand 110 states and 159 transitions. Second operand 5 states. [2020-10-14 23:59:13,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:59:13,277 INFO L93 Difference]: Finished difference Result 147 states and 209 transitions. [2020-10-14 23:59:13,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 23:59:13,278 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 21 [2020-10-14 23:59:13,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:59:13,279 INFO L225 Difference]: With dead ends: 147 [2020-10-14 23:59:13,279 INFO L226 Difference]: Without dead ends: 100 [2020-10-14 23:59:13,280 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-14 23:59:13,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-14 23:59:13,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 95. [2020-10-14 23:59:13,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-10-14 23:59:13,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 127 transitions. [2020-10-14 23:59:13,288 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 127 transitions. Word has length 21 [2020-10-14 23:59:13,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:59:13,289 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 127 transitions. [2020-10-14 23:59:13,289 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 23:59:13,289 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 127 transitions. [2020-10-14 23:59:13,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-14 23:59:13,290 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:59:13,290 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:59:13,290 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-14 23:59:13,290 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:59:13,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:59:13,291 INFO L82 PathProgramCache]: Analyzing trace with hash 197070696, now seen corresponding path program 4 times [2020-10-14 23:59:13,291 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:59:13,291 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1945538150] [2020-10-14 23:59:13,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:59:13,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:59:13,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:13,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:13,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:13,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:13,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:13,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:13,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:13,658 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:13,658 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-14 23:59:13,658 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 23:59:13,659 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 359 [2020-10-14 23:59:13,659 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:13,659 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:13,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-14 23:59:13,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:59:13,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-14 23:59:13,660 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:59:13,750 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:59:13,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:59:13,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:13,752 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:13,753 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:59:13,753 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:59:13,753 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:59:13,753 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:13,754 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:13,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:59:13,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:59:13,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:59:13,755 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:59:13,756 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:59:13,757 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1945538150] [2020-10-14 23:59:13,757 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:59:13,757 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-14 23:59:13,758 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216739126] [2020-10-14 23:59:13,758 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-14 23:59:13,758 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:59:13,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-14 23:59:13,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-14 23:59:13,759 INFO L87 Difference]: Start difference. First operand 95 states and 127 transitions. Second operand 7 states. [2020-10-14 23:59:13,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:59:13,874 INFO L93 Difference]: Finished difference Result 192 states and 284 transitions. [2020-10-14 23:59:13,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-14 23:59:13,875 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 21 [2020-10-14 23:59:13,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:59:13,876 INFO L225 Difference]: With dead ends: 192 [2020-10-14 23:59:13,876 INFO L226 Difference]: Without dead ends: 169 [2020-10-14 23:59:13,877 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-14 23:59:13,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2020-10-14 23:59:13,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 147. [2020-10-14 23:59:13,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-10-14 23:59:13,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 198 transitions. [2020-10-14 23:59:13,888 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 198 transitions. Word has length 21 [2020-10-14 23:59:13,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:59:13,888 INFO L479 AbstractCegarLoop]: Abstraction has 147 states and 198 transitions. [2020-10-14 23:59:13,888 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-14 23:59:13,888 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 198 transitions. [2020-10-14 23:59:13,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-14 23:59:13,889 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:59:13,889 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:59:13,890 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-14 23:59:13,890 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:59:13,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:59:13,890 INFO L82 PathProgramCache]: Analyzing trace with hash -317820736, now seen corresponding path program 3 times [2020-10-14 23:59:13,891 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:59:13,891 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [867136714] [2020-10-14 23:59:13,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:59:13,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:59:13,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:13,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:13,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:13,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:14,287 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:14,288 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-14 23:59:14,288 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 23:59:14,288 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 390 [2020-10-14 23:59:14,288 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:14,289 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:14,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-14 23:59:14,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 23:59:14,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-14 23:59:14,289 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:59:14,347 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:59:14,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:59:14,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:14,349 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:14,350 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:59:14,350 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:59:14,350 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:59:14,350 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:14,350 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:14,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:59:14,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:59:14,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:59:14,351 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:59:14,354 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-14 23:59:14,354 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [867136714] [2020-10-14 23:59:14,354 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:59:14,354 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-14 23:59:14,355 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838382008] [2020-10-14 23:59:14,355 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 23:59:14,355 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:59:14,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 23:59:14,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-14 23:59:14,356 INFO L87 Difference]: Start difference. First operand 147 states and 198 transitions. Second operand 6 states. [2020-10-14 23:59:14,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:59:14,458 INFO L93 Difference]: Finished difference Result 273 states and 392 transitions. [2020-10-14 23:59:14,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-14 23:59:14,459 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 22 [2020-10-14 23:59:14,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:59:14,461 INFO L225 Difference]: With dead ends: 273 [2020-10-14 23:59:14,461 INFO L226 Difference]: Without dead ends: 240 [2020-10-14 23:59:14,462 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-14 23:59:14,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2020-10-14 23:59:14,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 170. [2020-10-14 23:59:14,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170 states. [2020-10-14 23:59:14,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 226 transitions. [2020-10-14 23:59:14,474 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 226 transitions. Word has length 22 [2020-10-14 23:59:14,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:59:14,474 INFO L479 AbstractCegarLoop]: Abstraction has 170 states and 226 transitions. [2020-10-14 23:59:14,474 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 23:59:14,474 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 226 transitions. [2020-10-14 23:59:14,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-14 23:59:14,475 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:59:14,475 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:59:14,476 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-14 23:59:14,476 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:59:14,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:59:14,476 INFO L82 PathProgramCache]: Analyzing trace with hash 1749541985, now seen corresponding path program 1 times [2020-10-14 23:59:14,476 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:59:14,477 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [533474838] [2020-10-14 23:59:14,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:59:14,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:59:14,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:14,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:14,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:14,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:14,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:15,301 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:15,302 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-14 23:59:15,303 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 23:59:15,303 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 810 [2020-10-14 23:59:15,303 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:15,304 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:15,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-14 23:59:15,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:59:15,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-14 23:59:15,305 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:59:15,556 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:59:15,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:59:15,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:15,558 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:15,558 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:59:15,558 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:59:15,559 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:59:15,559 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:15,559 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:15,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:59:15,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:59:15,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:59:15,560 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:59:15,562 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:59:15,562 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [533474838] [2020-10-14 23:59:15,563 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:59:15,563 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-14 23:59:15,563 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209054526] [2020-10-14 23:59:15,563 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-14 23:59:15,564 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:59:15,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-14 23:59:15,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2020-10-14 23:59:15,564 INFO L87 Difference]: Start difference. First operand 170 states and 226 transitions. Second operand 13 states. [2020-10-14 23:59:20,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:59:20,478 INFO L93 Difference]: Finished difference Result 253 states and 353 transitions. [2020-10-14 23:59:20,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-14 23:59:20,479 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 22 [2020-10-14 23:59:20,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:59:20,480 INFO L225 Difference]: With dead ends: 253 [2020-10-14 23:59:20,480 INFO L226 Difference]: Without dead ends: 237 [2020-10-14 23:59:20,481 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2020-10-14 23:59:20,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2020-10-14 23:59:20,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 185. [2020-10-14 23:59:20,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2020-10-14 23:59:20,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 256 transitions. [2020-10-14 23:59:20,494 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 256 transitions. Word has length 22 [2020-10-14 23:59:20,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:59:20,494 INFO L479 AbstractCegarLoop]: Abstraction has 185 states and 256 transitions. [2020-10-14 23:59:20,494 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-14 23:59:20,495 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 256 transitions. [2020-10-14 23:59:20,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-14 23:59:20,495 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:59:20,496 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:59:20,496 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-14 23:59:20,496 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:59:20,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:59:20,496 INFO L82 PathProgramCache]: Analyzing trace with hash 747581391, now seen corresponding path program 2 times [2020-10-14 23:59:20,497 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:59:20,497 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [681795344] [2020-10-14 23:59:20,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:59:20,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:59:20,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:20,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:20,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:20,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:20,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:20,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:20,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:20,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:21,254 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:21,254 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-14 23:59:21,254 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-14 23:59:21,255 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 747 [2020-10-14 23:59:21,255 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:21,255 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:21,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-14 23:59:21,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:59:21,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-14 23:59:21,256 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:59:21,784 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:59:21,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:59:21,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:21,787 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:21,787 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:59:21,787 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:59:21,787 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:59:21,787 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:21,788 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:21,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:59:21,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:59:21,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:59:21,789 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:59:21,792 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:59:21,792 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [681795344] [2020-10-14 23:59:21,793 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:59:21,793 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-14 23:59:21,793 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840965836] [2020-10-14 23:59:21,793 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-14 23:59:21,794 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:59:21,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-14 23:59:21,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2020-10-14 23:59:21,795 INFO L87 Difference]: Start difference. First operand 185 states and 256 transitions. Second operand 13 states. [2020-10-14 23:59:25,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:59:25,231 INFO L93 Difference]: Finished difference Result 255 states and 361 transitions. [2020-10-14 23:59:25,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-14 23:59:25,231 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 22 [2020-10-14 23:59:25,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:59:25,233 INFO L225 Difference]: With dead ends: 255 [2020-10-14 23:59:25,233 INFO L226 Difference]: Without dead ends: 227 [2020-10-14 23:59:25,234 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2020-10-14 23:59:25,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2020-10-14 23:59:25,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 203. [2020-10-14 23:59:25,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2020-10-14 23:59:25,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 273 transitions. [2020-10-14 23:59:25,248 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 273 transitions. Word has length 22 [2020-10-14 23:59:25,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:59:25,248 INFO L479 AbstractCegarLoop]: Abstraction has 203 states and 273 transitions. [2020-10-14 23:59:25,248 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-14 23:59:25,249 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 273 transitions. [2020-10-14 23:59:25,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-14 23:59:25,249 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:59:25,250 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:59:25,250 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-14 23:59:25,250 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:59:25,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:59:25,250 INFO L82 PathProgramCache]: Analyzing trace with hash -1816132959, now seen corresponding path program 3 times [2020-10-14 23:59:25,251 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:59:25,251 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [5648087] [2020-10-14 23:59:25,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:59:25,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:59:25,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:25,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:25,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:25,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:25,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:25,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:25,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:25,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:25,830 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:25,831 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-14 23:59:25,831 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-14 23:59:25,831 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 571 [2020-10-14 23:59:25,831 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:25,832 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:25,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 23:59:25,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:59:25,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-14 23:59:25,833 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:59:25,919 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:59:25,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:59:25,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:25,921 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:25,921 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:59:25,921 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:59:25,922 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:59:25,922 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:25,922 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:25,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:59:25,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:59:25,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:59:25,923 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:59:25,925 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:59:25,925 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [5648087] [2020-10-14 23:59:25,925 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:59:25,925 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-14 23:59:25,926 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707356775] [2020-10-14 23:59:25,926 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-14 23:59:25,926 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:59:25,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-14 23:59:25,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-10-14 23:59:25,927 INFO L87 Difference]: Start difference. First operand 203 states and 273 transitions. Second operand 8 states. [2020-10-14 23:59:26,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:59:26,087 INFO L93 Difference]: Finished difference Result 335 states and 485 transitions. [2020-10-14 23:59:26,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-14 23:59:26,087 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 22 [2020-10-14 23:59:26,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:59:26,089 INFO L225 Difference]: With dead ends: 335 [2020-10-14 23:59:26,089 INFO L226 Difference]: Without dead ends: 293 [2020-10-14 23:59:26,090 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-10-14 23:59:26,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2020-10-14 23:59:26,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 260. [2020-10-14 23:59:26,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 260 states. [2020-10-14 23:59:26,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 348 transitions. [2020-10-14 23:59:26,108 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 348 transitions. Word has length 22 [2020-10-14 23:59:26,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:59:26,108 INFO L479 AbstractCegarLoop]: Abstraction has 260 states and 348 transitions. [2020-10-14 23:59:26,108 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-14 23:59:26,108 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 348 transitions. [2020-10-14 23:59:26,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-14 23:59:26,110 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:59:26,110 INFO L422 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:59:26,111 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-14 23:59:26,111 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:59:26,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:59:26,111 INFO L82 PathProgramCache]: Analyzing trace with hash -1554527128, now seen corresponding path program 4 times [2020-10-14 23:59:26,111 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:59:26,112 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1098057173] [2020-10-14 23:59:26,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:59:26,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:59:26,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:26,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:26,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:26,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:26,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:26,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:26,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:26,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:26,906 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:26,906 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-14 23:59:26,906 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-14 23:59:26,906 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 784 [2020-10-14 23:59:26,907 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:26,907 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:26,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-14 23:59:26,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:59:26,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-14 23:59:26,908 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:59:27,000 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:59:27,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:59:27,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:27,003 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:27,003 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:59:27,003 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:59:27,003 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:59:27,003 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:27,004 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:27,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:59:27,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:59:27,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:59:27,005 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:59:27,007 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:59:27,007 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1098057173] [2020-10-14 23:59:27,008 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:59:27,008 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-14 23:59:27,008 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101035991] [2020-10-14 23:59:27,009 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-14 23:59:27,009 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:59:27,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-14 23:59:27,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-10-14 23:59:27,010 INFO L87 Difference]: Start difference. First operand 260 states and 348 transitions. Second operand 9 states. [2020-10-14 23:59:27,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:59:27,205 INFO L93 Difference]: Finished difference Result 401 states and 577 transitions. [2020-10-14 23:59:27,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-14 23:59:27,206 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 23 [2020-10-14 23:59:27,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:59:27,208 INFO L225 Difference]: With dead ends: 401 [2020-10-14 23:59:27,209 INFO L226 Difference]: Without dead ends: 359 [2020-10-14 23:59:27,209 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-10-14 23:59:27,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2020-10-14 23:59:27,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 283. [2020-10-14 23:59:27,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 283 states. [2020-10-14 23:59:27,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 382 transitions. [2020-10-14 23:59:27,226 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 382 transitions. Word has length 23 [2020-10-14 23:59:27,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:59:27,226 INFO L479 AbstractCegarLoop]: Abstraction has 283 states and 382 transitions. [2020-10-14 23:59:27,226 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-14 23:59:27,226 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 382 transitions. [2020-10-14 23:59:27,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-14 23:59:27,228 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:59:27,228 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:59:27,228 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-14 23:59:27,228 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:59:27,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:59:27,229 INFO L82 PathProgramCache]: Analyzing trace with hash 919932143, now seen corresponding path program 4 times [2020-10-14 23:59:27,229 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:59:27,229 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1615643996] [2020-10-14 23:59:27,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:59:27,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:59:27,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:27,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:27,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:27,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:27,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:28,312 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:28,312 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-14 23:59:28,312 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 23:59:28,312 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1076 [2020-10-14 23:59:28,313 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:28,313 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:28,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-14 23:59:28,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 23:59:28,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-14 23:59:28,314 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:59:28,378 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:59:28,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:59:28,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:28,381 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:28,381 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:59:28,381 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:59:28,382 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:59:28,382 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:28,382 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:28,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:59:28,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:59:28,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:59:28,383 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:59:28,386 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-14 23:59:28,386 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1615643996] [2020-10-14 23:59:28,386 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:59:28,387 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-14 23:59:28,394 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460003854] [2020-10-14 23:59:28,394 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 23:59:28,395 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:59:28,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 23:59:28,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-14 23:59:28,396 INFO L87 Difference]: Start difference. First operand 283 states and 382 transitions. Second operand 6 states. [2020-10-14 23:59:28,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:59:28,699 INFO L93 Difference]: Finished difference Result 332 states and 448 transitions. [2020-10-14 23:59:28,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-14 23:59:28,700 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 24 [2020-10-14 23:59:28,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:59:28,703 INFO L225 Difference]: With dead ends: 332 [2020-10-14 23:59:28,704 INFO L226 Difference]: Without dead ends: 267 [2020-10-14 23:59:28,707 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-10-14 23:59:28,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2020-10-14 23:59:28,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 251. [2020-10-14 23:59:28,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 251 states. [2020-10-14 23:59:28,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 336 transitions. [2020-10-14 23:59:28,729 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 336 transitions. Word has length 24 [2020-10-14 23:59:28,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:59:28,730 INFO L479 AbstractCegarLoop]: Abstraction has 251 states and 336 transitions. [2020-10-14 23:59:28,730 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 23:59:28,730 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 336 transitions. [2020-10-14 23:59:28,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-14 23:59:28,731 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:59:28,731 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:59:28,732 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-14 23:59:28,732 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:59:28,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:59:28,732 INFO L82 PathProgramCache]: Analyzing trace with hash -1600200383, now seen corresponding path program 5 times [2020-10-14 23:59:28,733 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:59:28,733 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [91135493] [2020-10-14 23:59:28,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:59:28,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:59:28,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:28,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:28,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:28,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:28,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:29,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:29,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:29,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:29,907 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:29,907 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-14 23:59:29,908 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-14 23:59:29,908 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1161 [2020-10-14 23:59:29,908 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:29,909 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:29,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-14 23:59:29,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:59:29,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-14 23:59:29,910 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:59:30,641 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:59:30,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:59:30,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:30,643 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:30,643 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:59:30,643 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:59:30,644 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:59:30,644 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:30,644 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:30,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:59:30,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:59:30,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:59:30,645 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:59:30,648 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:59:30,648 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [91135493] [2020-10-14 23:59:30,648 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:59:30,648 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-14 23:59:30,648 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286987512] [2020-10-14 23:59:30,650 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-14 23:59:30,650 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:59:30,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-14 23:59:30,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2020-10-14 23:59:30,651 INFO L87 Difference]: Start difference. First operand 251 states and 336 transitions. Second operand 15 states. [2020-10-14 23:59:33,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:59:33,692 INFO L93 Difference]: Finished difference Result 486 states and 674 transitions. [2020-10-14 23:59:33,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-14 23:59:33,694 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 24 [2020-10-14 23:59:33,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:59:33,697 INFO L225 Difference]: With dead ends: 486 [2020-10-14 23:59:33,697 INFO L226 Difference]: Without dead ends: 417 [2020-10-14 23:59:33,699 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 487 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=214, Invalid=1948, Unknown=0, NotChecked=0, Total=2162 [2020-10-14 23:59:33,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2020-10-14 23:59:33,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 317. [2020-10-14 23:59:33,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 317 states. [2020-10-14 23:59:33,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 412 transitions. [2020-10-14 23:59:33,722 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 412 transitions. Word has length 24 [2020-10-14 23:59:33,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:59:33,723 INFO L479 AbstractCegarLoop]: Abstraction has 317 states and 412 transitions. [2020-10-14 23:59:33,723 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-14 23:59:33,724 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 412 transitions. [2020-10-14 23:59:33,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-14 23:59:33,731 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:59:33,732 INFO L422 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:59:33,732 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-14 23:59:33,732 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:59:33,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:59:33,732 INFO L82 PathProgramCache]: Analyzing trace with hash -2034680959, now seen corresponding path program 6 times [2020-10-14 23:59:33,733 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:59:33,733 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [80483615] [2020-10-14 23:59:33,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:59:33,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:59:33,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:33,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:33,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:33,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:33,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:33,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:33,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:33,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:34,630 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:34,630 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-14 23:59:34,631 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-14 23:59:34,631 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 884 [2020-10-14 23:59:34,631 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:34,631 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:34,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-14 23:59:34,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:59:34,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-14 23:59:34,632 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:59:34,744 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:59:34,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:59:34,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:34,746 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:34,746 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:59:34,746 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:59:34,746 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:59:34,746 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:34,747 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:34,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:59:34,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:59:34,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:59:34,747 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:59:34,749 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:59:34,749 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [80483615] [2020-10-14 23:59:34,749 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:59:34,749 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-14 23:59:34,750 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495139199] [2020-10-14 23:59:34,750 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-14 23:59:34,750 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:59:34,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-14 23:59:34,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-10-14 23:59:34,751 INFO L87 Difference]: Start difference. First operand 317 states and 412 transitions. Second operand 10 states. [2020-10-14 23:59:35,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:59:35,050 INFO L93 Difference]: Finished difference Result 470 states and 659 transitions. [2020-10-14 23:59:35,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-14 23:59:35,050 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 24 [2020-10-14 23:59:35,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:59:35,053 INFO L225 Difference]: With dead ends: 470 [2020-10-14 23:59:35,053 INFO L226 Difference]: Without dead ends: 428 [2020-10-14 23:59:35,054 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-10-14 23:59:35,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 428 states. [2020-10-14 23:59:35,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 428 to 340. [2020-10-14 23:59:35,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 340 states. [2020-10-14 23:59:35,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 446 transitions. [2020-10-14 23:59:35,074 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 446 transitions. Word has length 24 [2020-10-14 23:59:35,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:59:35,075 INFO L479 AbstractCegarLoop]: Abstraction has 340 states and 446 transitions. [2020-10-14 23:59:35,075 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-14 23:59:35,075 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 446 transitions. [2020-10-14 23:59:35,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-14 23:59:35,076 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:59:35,076 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] [2020-10-14 23:59:35,077 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-14 23:59:35,077 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:59:35,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:59:35,077 INFO L82 PathProgramCache]: Analyzing trace with hash 1837985831, now seen corresponding path program 1 times [2020-10-14 23:59:35,077 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:59:35,078 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [955680095] [2020-10-14 23:59:35,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:59:35,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:59:35,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:35,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:35,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:35,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:35,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:35,771 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:35,771 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-14 23:59:35,771 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 23:59:35,772 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 684 [2020-10-14 23:59:35,772 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:35,772 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:35,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-14 23:59:35,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:59:35,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-14 23:59:35,773 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:59:35,935 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:59:35,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:59:35,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:35,936 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:35,936 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:59:35,937 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:59:35,937 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:59:35,937 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:35,937 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:35,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:59:35,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:59:35,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:59:35,937 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:59:35,940 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 23:59:35,940 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [955680095] [2020-10-14 23:59:35,940 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:59:35,941 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-14 23:59:35,941 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368226662] [2020-10-14 23:59:35,941 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-14 23:59:35,941 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:59:35,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-14 23:59:35,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-10-14 23:59:35,942 INFO L87 Difference]: Start difference. First operand 340 states and 446 transitions. Second operand 11 states. [2020-10-14 23:59:36,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:59:36,308 INFO L93 Difference]: Finished difference Result 372 states and 483 transitions. [2020-10-14 23:59:36,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-14 23:59:36,308 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 25 [2020-10-14 23:59:36,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:59:36,310 INFO L225 Difference]: With dead ends: 372 [2020-10-14 23:59:36,310 INFO L226 Difference]: Without dead ends: 357 [2020-10-14 23:59:36,311 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2020-10-14 23:59:36,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2020-10-14 23:59:36,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 340. [2020-10-14 23:59:36,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 340 states. [2020-10-14 23:59:36,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 448 transitions. [2020-10-14 23:59:36,327 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 448 transitions. Word has length 25 [2020-10-14 23:59:36,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:59:36,327 INFO L479 AbstractCegarLoop]: Abstraction has 340 states and 448 transitions. [2020-10-14 23:59:36,328 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-14 23:59:36,328 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 448 transitions. [2020-10-14 23:59:36,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-14 23:59:36,329 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:59:36,329 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:59:36,330 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-14 23:59:36,330 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:59:36,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:59:36,331 INFO L82 PathProgramCache]: Analyzing trace with hash -134684440, now seen corresponding path program 2 times [2020-10-14 23:59:36,331 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:59:36,332 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [166839205] [2020-10-14 23:59:36,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:59:36,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:59:36,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:36,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:36,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:36,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:36,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:36,899 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:36,899 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-14 23:59:36,900 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 23:59:36,900 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 553 [2020-10-14 23:59:36,900 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:36,900 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:36,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-14 23:59:36,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:59:36,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-14 23:59:36,901 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:59:37,433 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:59:37,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:59:37,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:37,435 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:37,436 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:59:37,436 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:59:37,436 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:59:37,436 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:37,437 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:37,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:59:37,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:59:37,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:59:37,437 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:59:37,442 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:59:37,442 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [166839205] [2020-10-14 23:59:37,442 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:59:37,442 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-14 23:59:37,443 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968730485] [2020-10-14 23:59:37,443 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-14 23:59:37,443 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:59:37,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-14 23:59:37,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2020-10-14 23:59:37,444 INFO L87 Difference]: Start difference. First operand 340 states and 448 transitions. Second operand 16 states. [2020-10-14 23:59:37,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:59:37,814 INFO L93 Difference]: Finished difference Result 350 states and 457 transitions. [2020-10-14 23:59:37,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-14 23:59:37,817 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 25 [2020-10-14 23:59:37,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:59:37,819 INFO L225 Difference]: With dead ends: 350 [2020-10-14 23:59:37,819 INFO L226 Difference]: Without dead ends: 335 [2020-10-14 23:59:37,820 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2020-10-14 23:59:37,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2020-10-14 23:59:37,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 335. [2020-10-14 23:59:37,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 335 states. [2020-10-14 23:59:37,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 442 transitions. [2020-10-14 23:59:37,838 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 442 transitions. Word has length 25 [2020-10-14 23:59:37,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:59:37,839 INFO L479 AbstractCegarLoop]: Abstraction has 335 states and 442 transitions. [2020-10-14 23:59:37,839 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-14 23:59:37,839 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 442 transitions. [2020-10-14 23:59:37,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-14 23:59:37,840 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:59:37,840 INFO L422 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:59:37,840 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-14 23:59:37,840 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:59:37,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:59:37,841 INFO L82 PathProgramCache]: Analyzing trace with hash 260419464, now seen corresponding path program 7 times [2020-10-14 23:59:37,841 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:59:37,848 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1113872144] [2020-10-14 23:59:37,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:59:37,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:59:37,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:37,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:37,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:37,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:37,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:38,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:38,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:38,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:38,691 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:38,691 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-14 23:59:38,691 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-14 23:59:38,691 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 834 [2020-10-14 23:59:38,692 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:38,692 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:38,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-14 23:59:38,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:59:38,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-14 23:59:38,692 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:59:38,816 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:59:38,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:59:38,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:38,818 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:38,818 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:59:38,819 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:59:38,819 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:59:38,819 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:38,819 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:38,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:59:38,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:59:38,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:59:38,820 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:59:38,821 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:59:38,822 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1113872144] [2020-10-14 23:59:38,822 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:59:38,822 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-14 23:59:38,823 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717406860] [2020-10-14 23:59:38,823 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-14 23:59:38,823 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:59:38,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-14 23:59:38,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2020-10-14 23:59:38,825 INFO L87 Difference]: Start difference. First operand 335 states and 442 transitions. Second operand 11 states. [2020-10-14 23:59:39,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:59:39,191 INFO L93 Difference]: Finished difference Result 501 states and 713 transitions. [2020-10-14 23:59:39,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-14 23:59:39,192 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 25 [2020-10-14 23:59:39,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:59:39,194 INFO L225 Difference]: With dead ends: 501 [2020-10-14 23:59:39,194 INFO L226 Difference]: Without dead ends: 454 [2020-10-14 23:59:39,195 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2020-10-14 23:59:39,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2020-10-14 23:59:39,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 358. [2020-10-14 23:59:39,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 358 states. [2020-10-14 23:59:39,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 476 transitions. [2020-10-14 23:59:39,212 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 476 transitions. Word has length 25 [2020-10-14 23:59:39,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:59:39,213 INFO L479 AbstractCegarLoop]: Abstraction has 358 states and 476 transitions. [2020-10-14 23:59:39,213 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-14 23:59:39,213 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 476 transitions. [2020-10-14 23:59:39,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-14 23:59:39,214 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:59:39,214 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:59:39,214 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-14 23:59:39,214 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:59:39,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:59:39,215 INFO L82 PathProgramCache]: Analyzing trace with hash 1541798863, now seen corresponding path program 8 times [2020-10-14 23:59:39,215 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:59:39,215 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1821391110] [2020-10-14 23:59:39,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:59:39,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:59:39,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:39,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:39,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:39,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:39,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:39,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:39,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:39,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:40,267 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:40,267 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-14 23:59:40,267 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-14 23:59:40,267 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1044 [2020-10-14 23:59:40,267 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:40,268 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:40,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-14 23:59:40,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:59:40,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-14 23:59:40,268 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:59:43,016 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:59:43,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:59:43,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:43,018 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:43,018 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:59:43,018 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:59:43,018 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:59:43,018 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:43,018 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:43,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:59:43,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:59:43,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:59:43,019 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:59:43,021 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 29 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:59:43,022 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1821391110] [2020-10-14 23:59:43,022 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:59:43,022 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-14 23:59:43,022 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426473746] [2020-10-14 23:59:43,022 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-14 23:59:43,022 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:59:43,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-14 23:59:43,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=229, Unknown=1, NotChecked=0, Total=272 [2020-10-14 23:59:43,023 INFO L87 Difference]: Start difference. First operand 358 states and 476 transitions. Second operand 17 states. [2020-10-14 23:59:50,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:59:50,459 INFO L93 Difference]: Finished difference Result 560 states and 763 transitions. [2020-10-14 23:59:50,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-14 23:59:50,461 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 26 [2020-10-14 23:59:50,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:59:50,464 INFO L225 Difference]: With dead ends: 560 [2020-10-14 23:59:50,464 INFO L226 Difference]: Without dead ends: 535 [2020-10-14 23:59:50,464 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=47, Invalid=258, Unknown=1, NotChecked=0, Total=306 [2020-10-14 23:59:50,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 535 states. [2020-10-14 23:59:50,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 535 to 426. [2020-10-14 23:59:50,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 426 states. [2020-10-14 23:59:50,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 426 states to 426 states and 554 transitions. [2020-10-14 23:59:50,487 INFO L78 Accepts]: Start accepts. Automaton has 426 states and 554 transitions. Word has length 26 [2020-10-14 23:59:50,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:59:50,487 INFO L479 AbstractCegarLoop]: Abstraction has 426 states and 554 transitions. [2020-10-14 23:59:50,487 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-14 23:59:50,487 INFO L276 IsEmpty]: Start isEmpty. Operand 426 states and 554 transitions. [2020-10-14 23:59:50,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-14 23:59:50,488 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:59:50,489 INFO L422 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:59:50,489 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-14 23:59:50,489 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:59:50,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:59:50,489 INFO L82 PathProgramCache]: Analyzing trace with hash -1605911455, now seen corresponding path program 9 times [2020-10-14 23:59:50,490 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:59:50,490 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1594179343] [2020-10-14 23:59:50,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:59:50,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:59:50,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:50,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:50,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:50,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:50,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:50,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:50,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:51,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:51,484 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:51,484 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-14 23:59:51,484 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-14 23:59:51,485 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 986 [2020-10-14 23:59:51,485 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:51,485 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:51,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-14 23:59:51,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:59:51,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-14 23:59:51,487 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:59:51,664 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:59:51,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:59:51,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:51,670 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:51,670 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:59:51,670 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:59:51,670 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-14 23:59:51,671 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:51,671 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:51,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:59:51,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:59:51,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:59:51,672 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:59:51,674 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:59:51,674 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1594179343] [2020-10-14 23:59:51,674 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:59:51,674 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-14 23:59:51,674 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55309794] [2020-10-14 23:59:51,675 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-14 23:59:51,675 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:59:51,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-14 23:59:51,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2020-10-14 23:59:51,675 INFO L87 Difference]: Start difference. First operand 426 states and 554 transitions. Second operand 12 states. [2020-10-14 23:59:52,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:59:52,069 INFO L93 Difference]: Finished difference Result 607 states and 849 transitions. [2020-10-14 23:59:52,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-14 23:59:52,069 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 26 [2020-10-14 23:59:52,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:59:52,073 INFO L225 Difference]: With dead ends: 607 [2020-10-14 23:59:52,073 INFO L226 Difference]: Without dead ends: 560 [2020-10-14 23:59:52,074 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2020-10-14 23:59:52,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 560 states. [2020-10-14 23:59:52,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 560 to 451. [2020-10-14 23:59:52,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 451 states. [2020-10-14 23:59:52,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 451 states to 451 states and 591 transitions. [2020-10-14 23:59:52,095 INFO L78 Accepts]: Start accepts. Automaton has 451 states and 591 transitions. Word has length 26 [2020-10-14 23:59:52,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:59:52,096 INFO L479 AbstractCegarLoop]: Abstraction has 451 states and 591 transitions. [2020-10-14 23:59:52,096 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-14 23:59:52,096 INFO L276 IsEmpty]: Start isEmpty. Operand 451 states and 591 transitions. [2020-10-14 23:59:52,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-14 23:59:52,097 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:59:52,097 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:59:52,098 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-14 23:59:52,098 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:59:52,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:59:52,098 INFO L82 PathProgramCache]: Analyzing trace with hash 1203368807, now seen corresponding path program 2 times [2020-10-14 23:59:52,098 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:59:52,098 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1924880315] [2020-10-14 23:59:52,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:59:52,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:59:52,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:52,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:52,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:52,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:52,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:53,483 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:53,483 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-14 23:59:53,484 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 23:59:53,484 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1377 [2020-10-14 23:59:53,484 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:53,484 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:53,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-14 23:59:53,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:59:53,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-14 23:59:53,484 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:59:53,561 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:59:53,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:59:53,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:53,562 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:53,562 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:59:53,563 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:59:53,563 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:59:53,563 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:53,563 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:53,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:59:53,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:59:53,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:59:53,563 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:59:53,565 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-14 23:59:53,565 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1924880315] [2020-10-14 23:59:53,566 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:59:53,566 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-14 23:59:53,566 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476159055] [2020-10-14 23:59:53,569 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-14 23:59:53,569 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:59:53,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-14 23:59:53,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-10-14 23:59:53,569 INFO L87 Difference]: Start difference. First operand 451 states and 591 transitions. Second operand 7 states. [2020-10-14 23:59:55,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:59:55,919 INFO L93 Difference]: Finished difference Result 690 states and 910 transitions. [2020-10-14 23:59:55,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-14 23:59:55,920 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 27 [2020-10-14 23:59:55,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:59:55,923 INFO L225 Difference]: With dead ends: 690 [2020-10-14 23:59:55,923 INFO L226 Difference]: Without dead ends: 663 [2020-10-14 23:59:55,924 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-10-14 23:59:55,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 663 states. [2020-10-14 23:59:55,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 663 to 461. [2020-10-14 23:59:55,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 461 states. [2020-10-14 23:59:55,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 461 states to 461 states and 599 transitions. [2020-10-14 23:59:55,959 INFO L78 Accepts]: Start accepts. Automaton has 461 states and 599 transitions. Word has length 27 [2020-10-14 23:59:55,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:59:55,960 INFO L479 AbstractCegarLoop]: Abstraction has 461 states and 599 transitions. [2020-10-14 23:59:55,960 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-14 23:59:55,960 INFO L276 IsEmpty]: Start isEmpty. Operand 461 states and 599 transitions. [2020-10-14 23:59:55,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-14 23:59:55,961 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:59:55,961 INFO L422 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:59:55,961 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-14 23:59:55,961 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:59:55,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:59:55,962 INFO L82 PathProgramCache]: Analyzing trace with hash 667372200, now seen corresponding path program 10 times [2020-10-14 23:59:55,963 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:59:55,963 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1223768766] [2020-10-14 23:59:55,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:59:55,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:59:55,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:55,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:56,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:56,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:56,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:56,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:56,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:56,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:56,813 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:56,813 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-14 23:59:56,814 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-14 23:59:56,814 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 840 [2020-10-14 23:59:56,814 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:56,814 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:56,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-14 23:59:56,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:59:56,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-14 23:59:56,814 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:59:56,972 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:59:56,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:59:56,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:56,974 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:56,974 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:59:56,974 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:59:56,975 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:59:56,975 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:56,975 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:56,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:59:56,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:59:56,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:59:56,975 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:59:56,977 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:59:56,977 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1223768766] [2020-10-14 23:59:56,978 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:59:56,978 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-14 23:59:56,978 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716790958] [2020-10-14 23:59:56,979 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-14 23:59:56,979 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:59:56,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-14 23:59:56,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2020-10-14 23:59:56,980 INFO L87 Difference]: Start difference. First operand 461 states and 599 transitions. Second operand 13 states. [2020-10-14 23:59:57,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:59:57,465 INFO L93 Difference]: Finished difference Result 653 states and 913 transitions. [2020-10-14 23:59:57,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-14 23:59:57,467 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 27 [2020-10-14 23:59:57,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:59:57,471 INFO L225 Difference]: With dead ends: 653 [2020-10-14 23:59:57,472 INFO L226 Difference]: Without dead ends: 605 [2020-10-14 23:59:57,472 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2020-10-14 23:59:57,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 605 states. [2020-10-14 23:59:57,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 605 to 486. [2020-10-14 23:59:57,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 486 states. [2020-10-14 23:59:57,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 486 states to 486 states and 636 transitions. [2020-10-14 23:59:57,518 INFO L78 Accepts]: Start accepts. Automaton has 486 states and 636 transitions. Word has length 27 [2020-10-14 23:59:57,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:59:57,519 INFO L479 AbstractCegarLoop]: Abstraction has 486 states and 636 transitions. [2020-10-14 23:59:57,519 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-14 23:59:57,519 INFO L276 IsEmpty]: Start isEmpty. Operand 486 states and 636 transitions. [2020-10-14 23:59:57,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-14 23:59:57,521 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:59:57,521 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:59:57,522 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-14 23:59:57,522 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:59:57,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:59:57,522 INFO L82 PathProgramCache]: Analyzing trace with hash 1069725953, now seen corresponding path program 3 times [2020-10-14 23:59:57,523 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:59:57,523 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [473421522] [2020-10-14 23:59:57,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:59:57,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:59:57,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:57,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:57,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:57,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:59,319 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:59,319 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-14 23:59:59,319 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 23:59:59,319 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1785 [2020-10-14 23:59:59,319 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:59,320 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:59,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-14 23:59:59,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-14 23:59:59,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-14 23:59:59,320 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:59:59,407 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:59:59,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:59:59,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:59,409 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:59,409 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:59:59,410 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:59:59,410 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:59:59,410 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:59,410 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:59,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:59:59,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:59:59,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:59:59,411 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:59:59,412 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-14 23:59:59,412 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [473421522] [2020-10-14 23:59:59,412 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:59:59,412 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-14 23:59:59,413 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922251439] [2020-10-14 23:59:59,413 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-14 23:59:59,413 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:59:59,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-14 23:59:59,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-14 23:59:59,413 INFO L87 Difference]: Start difference. First operand 486 states and 636 transitions. Second operand 8 states. [2020-10-14 23:59:59,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:59:59,970 INFO L93 Difference]: Finished difference Result 599 states and 766 transitions. [2020-10-14 23:59:59,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-14 23:59:59,971 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 28 [2020-10-14 23:59:59,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:59:59,973 INFO L225 Difference]: With dead ends: 599 [2020-10-14 23:59:59,974 INFO L226 Difference]: Without dead ends: 502 [2020-10-14 23:59:59,974 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2020-10-14 23:59:59,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 502 states. [2020-10-14 23:59:59,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 502 to 451. [2020-10-14 23:59:59,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 451 states. [2020-10-15 00:00:00,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 451 states to 451 states and 580 transitions. [2020-10-15 00:00:00,000 INFO L78 Accepts]: Start accepts. Automaton has 451 states and 580 transitions. Word has length 28 [2020-10-15 00:00:00,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:00:00,001 INFO L479 AbstractCegarLoop]: Abstraction has 451 states and 580 transitions. [2020-10-15 00:00:00,001 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-15 00:00:00,001 INFO L276 IsEmpty]: Start isEmpty. Operand 451 states and 580 transitions. [2020-10-15 00:00:00,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-15 00:00:00,002 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:00:00,002 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:00:00,002 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-15 00:00:00,003 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:00:00,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:00:00,003 INFO L82 PathProgramCache]: Analyzing trace with hash 355602882, now seen corresponding path program 4 times [2020-10-15 00:00:00,003 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:00:00,003 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1712128214] [2020-10-15 00:00:00,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:00:00,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:00:00,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:00,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:00,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:00,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:00,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:01,138 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:00:01,138 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-15 00:00:01,138 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-15 00:00:01,139 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1127 [2020-10-15 00:00:01,139 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:00:01,139 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:00:01,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-15 00:00:01,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:00:01,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-15 00:00:01,140 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:00:01,725 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:00:01,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:00:01,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:01,727 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:00:01,727 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:00:01,727 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:00:01,727 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:00:01,728 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:00:01,728 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:00:01,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:00:01,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:00:01,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:00:01,728 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:00:01,732 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-15 00:00:01,733 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1712128214] [2020-10-15 00:00:01,733 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:00:01,733 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-15 00:00:01,733 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754400523] [2020-10-15 00:00:01,734 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-15 00:00:01,734 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:00:01,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-15 00:00:01,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2020-10-15 00:00:01,734 INFO L87 Difference]: Start difference. First operand 451 states and 580 transitions. Second operand 14 states. [2020-10-15 00:00:02,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:00:02,552 INFO L93 Difference]: Finished difference Result 462 states and 590 transitions. [2020-10-15 00:00:02,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 00:00:02,553 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 28 [2020-10-15 00:00:02,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:00:02,555 INFO L225 Difference]: With dead ends: 462 [2020-10-15 00:00:02,556 INFO L226 Difference]: Without dead ends: 445 [2020-10-15 00:00:02,559 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2020-10-15 00:00:02,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 445 states. [2020-10-15 00:00:02,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 445 to 445. [2020-10-15 00:00:02,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 445 states. [2020-10-15 00:00:02,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 445 states to 445 states and 573 transitions. [2020-10-15 00:00:02,583 INFO L78 Accepts]: Start accepts. Automaton has 445 states and 573 transitions. Word has length 28 [2020-10-15 00:00:02,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:00:02,583 INFO L479 AbstractCegarLoop]: Abstraction has 445 states and 573 transitions. [2020-10-15 00:00:02,584 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-15 00:00:02,584 INFO L276 IsEmpty]: Start isEmpty. Operand 445 states and 573 transitions. [2020-10-15 00:00:02,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-15 00:00:02,585 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:00:02,585 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:00:02,585 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-15 00:00:02,585 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:00:02,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:00:02,586 INFO L82 PathProgramCache]: Analyzing trace with hash -168518015, now seen corresponding path program 3 times [2020-10-15 00:00:02,586 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:00:02,586 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1029008691] [2020-10-15 00:00:02,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:00:02,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:00:02,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:02,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:02,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:02,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:02,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:03,387 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:00:03,387 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-15 00:00:03,387 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-15 00:00:03,388 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 793 [2020-10-15 00:00:03,388 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:00:03,388 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:00:03,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-15 00:00:03,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:00:03,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-15 00:00:03,388 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:00:04,347 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:00:04,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:00:04,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:04,349 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:00:04,349 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:00:04,349 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:00:04,349 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:00:04,349 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:00:04,349 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:00:04,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:00:04,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:00:04,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:00:04,350 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:00:04,353 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:00:04,353 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1029008691] [2020-10-15 00:00:04,353 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:00:04,353 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-15 00:00:04,354 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385491763] [2020-10-15 00:00:04,354 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 00:00:04,354 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:00:04,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 00:00:04,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=306, Unknown=0, NotChecked=0, Total=342 [2020-10-15 00:00:04,355 INFO L87 Difference]: Start difference. First operand 445 states and 573 transitions. Second operand 19 states. [2020-10-15 00:00:04,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:00:04,819 INFO L93 Difference]: Finished difference Result 456 states and 583 transitions. [2020-10-15 00:00:04,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-15 00:00:04,820 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 28 [2020-10-15 00:00:04,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:00:04,822 INFO L225 Difference]: With dead ends: 456 [2020-10-15 00:00:04,822 INFO L226 Difference]: Without dead ends: 439 [2020-10-15 00:00:04,823 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=52, Invalid=368, Unknown=0, NotChecked=0, Total=420 [2020-10-15 00:00:04,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2020-10-15 00:00:04,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 439. [2020-10-15 00:00:04,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 439 states. [2020-10-15 00:00:04,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 439 states to 439 states and 566 transitions. [2020-10-15 00:00:04,845 INFO L78 Accepts]: Start accepts. Automaton has 439 states and 566 transitions. Word has length 28 [2020-10-15 00:00:04,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:00:04,845 INFO L479 AbstractCegarLoop]: Abstraction has 439 states and 566 transitions. [2020-10-15 00:00:04,845 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 00:00:04,845 INFO L276 IsEmpty]: Start isEmpty. Operand 439 states and 566 transitions. [2020-10-15 00:00:04,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-15 00:00:04,846 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:00:04,846 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:00:04,846 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-15 00:00:04,847 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:00:04,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:00:04,847 INFO L82 PathProgramCache]: Analyzing trace with hash -516792127, now seen corresponding path program 11 times [2020-10-15 00:00:04,847 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:00:04,847 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [946017093] [2020-10-15 00:00:04,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:00:04,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:00:04,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:04,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:04,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:04,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:04,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:05,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:05,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:05,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:06,162 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:00:06,162 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-15 00:00:06,162 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-15 00:00:06,162 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1306 [2020-10-15 00:00:06,162 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:00:06,162 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:00:06,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-15 00:00:06,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:00:06,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-15 00:00:06,163 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:00:06,686 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:00:06,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:00:06,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:06,687 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:00:06,687 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:00:06,687 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:00:06,688 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:00:06,688 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:00:06,688 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:00:06,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:00:06,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:00:06,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:00:06,689 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:00:06,692 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:00:06,692 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [946017093] [2020-10-15 00:00:06,692 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:00:06,692 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-15 00:00:06,692 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548609292] [2020-10-15 00:00:06,693 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 00:00:06,693 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:00:06,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 00:00:06,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2020-10-15 00:00:06,693 INFO L87 Difference]: Start difference. First operand 439 states and 566 transitions. Second operand 19 states. [2020-10-15 00:00:41,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:00:41,141 INFO L93 Difference]: Finished difference Result 979 states and 1320 transitions. [2020-10-15 00:00:41,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2020-10-15 00:00:41,147 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 28 [2020-10-15 00:00:41,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:00:41,151 INFO L225 Difference]: With dead ends: 979 [2020-10-15 00:00:41,151 INFO L226 Difference]: Without dead ends: 911 [2020-10-15 00:00:41,153 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1962 ImplicationChecksByTransitivity, 21.9s TimeCoverageRelationStatistics Valid=438, Invalid=6360, Unknown=8, NotChecked=0, Total=6806 [2020-10-15 00:00:41,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 911 states. [2020-10-15 00:00:41,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 911 to 580. [2020-10-15 00:00:41,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 580 states. [2020-10-15 00:00:41,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 580 states to 580 states and 731 transitions. [2020-10-15 00:00:41,182 INFO L78 Accepts]: Start accepts. Automaton has 580 states and 731 transitions. Word has length 28 [2020-10-15 00:00:41,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:00:41,182 INFO L479 AbstractCegarLoop]: Abstraction has 580 states and 731 transitions. [2020-10-15 00:00:41,182 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 00:00:41,182 INFO L276 IsEmpty]: Start isEmpty. Operand 580 states and 731 transitions. [2020-10-15 00:00:41,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-15 00:00:41,183 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:00:41,184 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:00:41,184 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-15 00:00:41,184 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:00:41,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:00:41,185 INFO L82 PathProgramCache]: Analyzing trace with hash -1191477528, now seen corresponding path program 5 times [2020-10-15 00:00:41,185 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:00:41,185 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1468683097] [2020-10-15 00:00:41,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:00:41,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:00:41,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:41,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:41,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:41,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:41,719 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:00:41,719 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-15 00:00:41,719 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-15 00:00:41,719 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 526 [2020-10-15 00:00:41,720 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:00:41,720 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:00:41,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-15 00:00:41,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-15 00:00:41,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-15 00:00:41,720 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:00:41,862 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:00:41,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:00:41,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:41,864 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:00:41,864 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:00:41,864 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:00:41,864 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:00:41,864 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:00:41,865 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:00:41,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:00:41,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:00:41,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:00:41,865 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:00:41,867 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-15 00:00:41,867 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1468683097] [2020-10-15 00:00:41,867 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:00:41,867 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-15 00:00:41,868 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758173775] [2020-10-15 00:00:41,868 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-15 00:00:41,868 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:00:41,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-15 00:00:41,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-15 00:00:41,868 INFO L87 Difference]: Start difference. First operand 580 states and 731 transitions. Second operand 10 states. [2020-10-15 00:00:47,025 WARN L193 SmtUtils]: Spent 2.12 s on a formula simplification that was a NOOP. DAG size: 32 [2020-10-15 00:00:47,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:00:47,578 INFO L93 Difference]: Finished difference Result 729 states and 911 transitions. [2020-10-15 00:00:47,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-15 00:00:47,579 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 29 [2020-10-15 00:00:47,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:00:47,583 INFO L225 Difference]: With dead ends: 729 [2020-10-15 00:00:47,583 INFO L226 Difference]: Without dead ends: 625 [2020-10-15 00:00:47,584 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=155, Invalid=546, Unknown=1, NotChecked=0, Total=702 [2020-10-15 00:00:47,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 625 states. [2020-10-15 00:00:47,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 625 to 573. [2020-10-15 00:00:47,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 573 states. [2020-10-15 00:00:47,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 573 states to 573 states and 721 transitions. [2020-10-15 00:00:47,607 INFO L78 Accepts]: Start accepts. Automaton has 573 states and 721 transitions. Word has length 29 [2020-10-15 00:00:47,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:00:47,607 INFO L479 AbstractCegarLoop]: Abstraction has 573 states and 721 transitions. [2020-10-15 00:00:47,608 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-15 00:00:47,608 INFO L276 IsEmpty]: Start isEmpty. Operand 573 states and 721 transitions. [2020-10-15 00:00:47,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-15 00:00:47,609 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:00:47,609 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:00:47,609 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-15 00:00:47,610 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:00:47,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:00:47,610 INFO L82 PathProgramCache]: Analyzing trace with hash -1311877169, now seen corresponding path program 12 times [2020-10-15 00:00:47,610 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:00:47,610 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [825744263] [2020-10-15 00:00:47,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:00:47,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:00:47,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:47,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:47,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:47,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:47,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:48,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:48,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:48,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:48,933 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:00:48,933 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-15 00:00:48,933 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-15 00:00:48,934 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1315 [2020-10-15 00:00:48,934 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:00:48,934 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:00:48,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-15 00:00:48,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:00:48,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-15 00:00:48,934 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:00:49,748 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:00:49,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:00:49,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:49,750 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:00:49,750 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:00:49,750 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:00:49,751 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:00:49,751 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:00:49,751 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:00:49,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:00:49,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:00:49,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:00:49,752 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:00:49,759 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:00:49,759 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [825744263] [2020-10-15 00:00:49,760 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:00:49,760 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-15 00:00:49,760 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164577853] [2020-10-15 00:00:49,760 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-15 00:00:49,760 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:00:49,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-15 00:00:49,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=379, Unknown=0, NotChecked=0, Total=420 [2020-10-15 00:00:49,761 INFO L87 Difference]: Start difference. First operand 573 states and 721 transitions. Second operand 21 states. [2020-10-15 00:00:56,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:00:56,082 INFO L93 Difference]: Finished difference Result 992 states and 1245 transitions. [2020-10-15 00:00:56,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-15 00:00:56,082 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 30 [2020-10-15 00:00:56,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:00:56,087 INFO L225 Difference]: With dead ends: 992 [2020-10-15 00:00:56,088 INFO L226 Difference]: Without dead ends: 986 [2020-10-15 00:00:56,089 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=91, Invalid=901, Unknown=0, NotChecked=0, Total=992 [2020-10-15 00:00:56,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 986 states. [2020-10-15 00:00:56,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 986 to 583. [2020-10-15 00:00:56,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 583 states. [2020-10-15 00:00:56,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 583 states to 583 states and 731 transitions. [2020-10-15 00:00:56,122 INFO L78 Accepts]: Start accepts. Automaton has 583 states and 731 transitions. Word has length 30 [2020-10-15 00:00:56,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:00:56,123 INFO L479 AbstractCegarLoop]: Abstraction has 583 states and 731 transitions. [2020-10-15 00:00:56,123 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-15 00:00:56,123 INFO L276 IsEmpty]: Start isEmpty. Operand 583 states and 731 transitions. [2020-10-15 00:00:56,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-15 00:00:56,124 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:00:56,125 INFO L422 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:00:56,125 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-15 00:00:56,125 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:00:56,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:00:56,126 INFO L82 PathProgramCache]: Analyzing trace with hash 1690450913, now seen corresponding path program 13 times [2020-10-15 00:00:56,126 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:00:56,126 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [342439740] [2020-10-15 00:00:56,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:00:56,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:00:56,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:56,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:56,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:56,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:56,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:56,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:57,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:57,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:57,553 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:00:57,553 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-15 00:00:57,553 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-15 00:00:57,554 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1417 [2020-10-15 00:00:57,554 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:00:57,554 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:00:57,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-15 00:00:57,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:00:57,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-15 00:00:57,554 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:00:57,747 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:00:57,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:00:57,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:57,749 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:00:57,750 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:00:57,750 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:00:57,750 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:00:57,750 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:00:57,750 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:00:57,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:00:57,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:00:57,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:00:57,751 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:00:57,753 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:00:57,753 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [342439740] [2020-10-15 00:00:57,753 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:00:57,753 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-15 00:00:57,753 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959086195] [2020-10-15 00:00:57,754 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-15 00:00:57,754 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:00:57,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-15 00:00:57,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2020-10-15 00:00:57,755 INFO L87 Difference]: Start difference. First operand 583 states and 731 transitions. Second operand 14 states. [2020-10-15 00:00:58,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:00:58,271 INFO L93 Difference]: Finished difference Result 803 states and 1083 transitions. [2020-10-15 00:00:58,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-15 00:00:58,272 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 30 [2020-10-15 00:00:58,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:00:58,276 INFO L225 Difference]: With dead ends: 803 [2020-10-15 00:00:58,276 INFO L226 Difference]: Without dead ends: 749 [2020-10-15 00:00:58,277 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2020-10-15 00:00:58,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 749 states. [2020-10-15 00:00:58,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 749 to 609. [2020-10-15 00:00:58,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 609 states. [2020-10-15 00:00:58,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 609 states to 609 states and 769 transitions. [2020-10-15 00:00:58,303 INFO L78 Accepts]: Start accepts. Automaton has 609 states and 769 transitions. Word has length 30 [2020-10-15 00:00:58,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:00:58,303 INFO L479 AbstractCegarLoop]: Abstraction has 609 states and 769 transitions. [2020-10-15 00:00:58,304 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-15 00:00:58,304 INFO L276 IsEmpty]: Start isEmpty. Operand 609 states and 769 transitions. [2020-10-15 00:00:58,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-15 00:00:58,305 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:00:58,305 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:00:58,305 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-15 00:00:58,305 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:00:58,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:00:58,306 INFO L82 PathProgramCache]: Analyzing trace with hash 273504711, now seen corresponding path program 5 times [2020-10-15 00:00:58,306 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:00:58,306 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1726617821] [2020-10-15 00:00:58,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:00:58,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:00:58,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:58,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:58,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:58,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:58,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:59,098 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:00:59,098 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-15 00:00:59,098 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-15 00:00:59,099 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 783 [2020-10-15 00:00:59,099 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:00:59,099 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:00:59,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-15 00:00:59,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:00:59,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-15 00:00:59,099 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:00:59,247 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:00:59,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:00:59,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:59,249 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:00:59,249 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:00:59,249 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:00:59,250 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:00:59,250 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:00:59,250 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:00:59,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:00:59,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:00:59,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:00:59,250 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:00:59,253 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-10-15 00:00:59,253 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1726617821] [2020-10-15 00:00:59,253 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:00:59,253 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-15 00:00:59,253 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675772409] [2020-10-15 00:00:59,254 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 00:00:59,254 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:00:59,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 00:00:59,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-15 00:00:59,254 INFO L87 Difference]: Start difference. First operand 609 states and 769 transitions. Second operand 11 states. [2020-10-15 00:00:59,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:00:59,694 INFO L93 Difference]: Finished difference Result 684 states and 860 transitions. [2020-10-15 00:00:59,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-15 00:00:59,695 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 31 [2020-10-15 00:00:59,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:00:59,698 INFO L225 Difference]: With dead ends: 684 [2020-10-15 00:00:59,698 INFO L226 Difference]: Without dead ends: 665 [2020-10-15 00:00:59,698 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2020-10-15 00:00:59,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 665 states. [2020-10-15 00:00:59,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 665 to 608. [2020-10-15 00:00:59,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 608 states. [2020-10-15 00:00:59,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 608 states to 608 states and 771 transitions. [2020-10-15 00:00:59,727 INFO L78 Accepts]: Start accepts. Automaton has 608 states and 771 transitions. Word has length 31 [2020-10-15 00:00:59,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:00:59,727 INFO L479 AbstractCegarLoop]: Abstraction has 608 states and 771 transitions. [2020-10-15 00:00:59,727 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 00:00:59,727 INFO L276 IsEmpty]: Start isEmpty. Operand 608 states and 771 transitions. [2020-10-15 00:00:59,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-15 00:00:59,729 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:00:59,729 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:00:59,729 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-15 00:00:59,729 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:00:59,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:00:59,730 INFO L82 PathProgramCache]: Analyzing trace with hash -1480312376, now seen corresponding path program 4 times [2020-10-15 00:00:59,730 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:00:59,730 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [675284532] [2020-10-15 00:00:59,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:00:59,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:00:59,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:59,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:59,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:00,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:00,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:00,872 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:01:00,873 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-15 00:01:00,873 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-15 00:01:00,873 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1134 [2020-10-15 00:01:00,873 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:01:00,873 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:01:00,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-15 00:01:00,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:01:00,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-15 00:01:00,873 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:01:07,342 WARN L193 SmtUtils]: Spent 6.25 s on a formula simplification. DAG size of input: 31 DAG size of output: 23 [2020-10-15 00:01:11,557 WARN L193 SmtUtils]: Spent 2.12 s on a formula simplification. DAG size of input: 31 DAG size of output: 23 [2020-10-15 00:01:13,732 WARN L193 SmtUtils]: Spent 2.11 s on a formula simplification. DAG size of input: 31 DAG size of output: 20 [2020-10-15 00:01:17,055 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:01:17,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:01:17,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:17,057 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:01:17,058 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:01:17,058 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:01:17,058 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:01:17,058 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:01:17,058 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:01:17,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:01:17,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:01:17,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:01:17,059 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:01:17,064 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:01:17,064 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [675284532] [2020-10-15 00:01:17,064 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:01:17,064 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-15 00:01:17,064 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46625180] [2020-10-15 00:01:17,065 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-15 00:01:17,065 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:01:17,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-15 00:01:17,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=418, Unknown=2, NotChecked=0, Total=462 [2020-10-15 00:01:17,065 INFO L87 Difference]: Start difference. First operand 608 states and 771 transitions. Second operand 22 states. [2020-10-15 00:01:24,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:01:24,108 INFO L93 Difference]: Finished difference Result 620 states and 782 transitions. [2020-10-15 00:01:24,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-15 00:01:24,110 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 31 [2020-10-15 00:01:24,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:01:24,112 INFO L225 Difference]: With dead ends: 620 [2020-10-15 00:01:24,112 INFO L226 Difference]: Without dead ends: 601 [2020-10-15 00:01:24,113 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 16.1s TimeCoverageRelationStatistics Valid=42, Invalid=418, Unknown=2, NotChecked=0, Total=462 [2020-10-15 00:01:24,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 601 states. [2020-10-15 00:01:24,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 601 to 601. [2020-10-15 00:01:24,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 601 states. [2020-10-15 00:01:24,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 601 states to 601 states and 763 transitions. [2020-10-15 00:01:24,143 INFO L78 Accepts]: Start accepts. Automaton has 601 states and 763 transitions. Word has length 31 [2020-10-15 00:01:24,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:01:24,143 INFO L479 AbstractCegarLoop]: Abstraction has 601 states and 763 transitions. [2020-10-15 00:01:24,144 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-15 00:01:24,144 INFO L276 IsEmpty]: Start isEmpty. Operand 601 states and 763 transitions. [2020-10-15 00:01:24,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-15 00:01:24,145 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:01:24,145 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:01:24,145 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-15 00:01:24,146 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:01:24,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:01:24,146 INFO L82 PathProgramCache]: Analyzing trace with hash -575120376, now seen corresponding path program 5 times [2020-10-15 00:01:24,146 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:01:24,146 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [314600850] [2020-10-15 00:01:24,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:01:24,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:01:24,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:24,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:24,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:24,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:24,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:25,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:25,926 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:01:25,926 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-15 00:01:25,926 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-15 00:01:25,926 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1757 [2020-10-15 00:01:25,927 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:01:25,927 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:01:25,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-15 00:01:25,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:01:25,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-15 00:01:25,927 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:01:26,268 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:01:26,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:01:26,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:26,270 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:01:26,270 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:01:26,270 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:01:26,270 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:01:26,270 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:01:26,270 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:01:26,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:01:26,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:01:26,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:01:26,271 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:01:26,273 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:01:26,273 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [314600850] [2020-10-15 00:01:26,273 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:01:26,273 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-15 00:01:26,274 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324613237] [2020-10-15 00:01:26,274 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 00:01:26,274 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:01:26,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 00:01:26,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=305, Unknown=0, NotChecked=0, Total=342 [2020-10-15 00:01:26,275 INFO L87 Difference]: Start difference. First operand 601 states and 763 transitions. Second operand 19 states. [2020-10-15 00:01:26,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:01:26,997 INFO L93 Difference]: Finished difference Result 673 states and 851 transitions. [2020-10-15 00:01:26,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-15 00:01:26,998 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 31 [2020-10-15 00:01:26,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:01:27,001 INFO L225 Difference]: With dead ends: 673 [2020-10-15 00:01:27,001 INFO L226 Difference]: Without dead ends: 656 [2020-10-15 00:01:27,002 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2020-10-15 00:01:27,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 656 states. [2020-10-15 00:01:27,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 656 to 591. [2020-10-15 00:01:27,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 591 states. [2020-10-15 00:01:27,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 591 states to 591 states and 752 transitions. [2020-10-15 00:01:27,029 INFO L78 Accepts]: Start accepts. Automaton has 591 states and 752 transitions. Word has length 31 [2020-10-15 00:01:27,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:01:27,029 INFO L479 AbstractCegarLoop]: Abstraction has 591 states and 752 transitions. [2020-10-15 00:01:27,030 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 00:01:27,030 INFO L276 IsEmpty]: Start isEmpty. Operand 591 states and 752 transitions. [2020-10-15 00:01:27,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-15 00:01:27,031 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:01:27,031 INFO L422 BasicCegarLoop]: trace histogram [11, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:01:27,031 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-15 00:01:27,032 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:01:27,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:01:27,032 INFO L82 PathProgramCache]: Analyzing trace with hash -374124888, now seen corresponding path program 14 times [2020-10-15 00:01:27,032 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:01:27,032 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1458544098] [2020-10-15 00:01:27,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:01:27,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:01:27,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:27,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:27,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:27,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:27,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:27,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:27,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:27,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:28,322 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:01:28,322 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-15 00:01:28,322 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-15 00:01:28,322 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1280 [2020-10-15 00:01:28,323 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:01:28,323 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:01:28,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-15 00:01:28,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:01:28,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-15 00:01:28,324 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:01:28,631 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:01:28,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:01:28,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:28,634 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:01:28,634 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:01:28,634 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:01:28,634 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:01:28,635 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:01:28,635 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:01:28,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:01:28,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:01:28,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:01:28,636 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:01:28,639 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:01:28,640 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1458544098] [2020-10-15 00:01:28,640 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:01:28,640 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-15 00:01:28,641 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298759513] [2020-10-15 00:01:28,641 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 00:01:28,641 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:01:28,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 00:01:28,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2020-10-15 00:01:28,642 INFO L87 Difference]: Start difference. First operand 591 states and 752 transitions. Second operand 15 states. [2020-10-15 00:01:29,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:01:29,743 INFO L93 Difference]: Finished difference Result 824 states and 1128 transitions. [2020-10-15 00:01:29,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 00:01:29,744 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 31 [2020-10-15 00:01:29,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:01:29,748 INFO L225 Difference]: With dead ends: 824 [2020-10-15 00:01:29,749 INFO L226 Difference]: Without dead ends: 765 [2020-10-15 00:01:29,749 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2020-10-15 00:01:29,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 765 states. [2020-10-15 00:01:29,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 765 to 617. [2020-10-15 00:01:29,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 617 states. [2020-10-15 00:01:29,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 617 states to 617 states and 790 transitions. [2020-10-15 00:01:29,799 INFO L78 Accepts]: Start accepts. Automaton has 617 states and 790 transitions. Word has length 31 [2020-10-15 00:01:29,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:01:29,799 INFO L479 AbstractCegarLoop]: Abstraction has 617 states and 790 transitions. [2020-10-15 00:01:29,799 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 00:01:29,800 INFO L276 IsEmpty]: Start isEmpty. Operand 617 states and 790 transitions. [2020-10-15 00:01:29,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-15 00:01:29,802 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:01:29,802 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:01:29,802 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-15 00:01:29,802 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:01:29,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:01:29,803 INFO L82 PathProgramCache]: Analyzing trace with hash -116092863, now seen corresponding path program 15 times [2020-10-15 00:01:29,803 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:01:29,803 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1918424151] [2020-10-15 00:01:29,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:01:29,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:01:29,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:29,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:29,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:30,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:30,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:30,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:30,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:30,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:31,410 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:01:31,410 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-15 00:01:31,410 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-15 00:01:31,410 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1595 [2020-10-15 00:01:31,410 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:01:31,411 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:01:31,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-15 00:01:31,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:01:31,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-15 00:01:31,411 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:01:32,080 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:01:32,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:01:32,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:32,081 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:01:32,082 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:01:32,082 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:01:32,082 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:01:32,082 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:01:32,082 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:01:32,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:01:32,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:01:32,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:01:32,083 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:01:32,085 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:01:32,086 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1918424151] [2020-10-15 00:01:32,086 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:01:32,086 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-15 00:01:32,086 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435091475] [2020-10-15 00:01:32,086 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-15 00:01:32,086 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:01:32,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-15 00:01:32,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2020-10-15 00:01:32,087 INFO L87 Difference]: Start difference. First operand 617 states and 790 transitions. Second operand 23 states. [2020-10-15 00:01:53,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:01:53,597 INFO L93 Difference]: Finished difference Result 1932 states and 2561 transitions. [2020-10-15 00:01:53,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2020-10-15 00:01:53,600 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 32 [2020-10-15 00:01:53,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:01:53,607 INFO L225 Difference]: With dead ends: 1932 [2020-10-15 00:01:53,607 INFO L226 Difference]: Without dead ends: 1744 [2020-10-15 00:01:53,612 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4869 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=686, Invalid=14320, Unknown=0, NotChecked=0, Total=15006 [2020-10-15 00:01:53,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1744 states. [2020-10-15 00:01:53,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1744 to 819. [2020-10-15 00:01:53,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 819 states. [2020-10-15 00:01:53,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 819 states to 819 states and 1024 transitions. [2020-10-15 00:01:53,647 INFO L78 Accepts]: Start accepts. Automaton has 819 states and 1024 transitions. Word has length 32 [2020-10-15 00:01:53,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:01:53,648 INFO L479 AbstractCegarLoop]: Abstraction has 819 states and 1024 transitions. [2020-10-15 00:01:53,648 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-15 00:01:53,648 INFO L276 IsEmpty]: Start isEmpty. Operand 819 states and 1024 transitions. [2020-10-15 00:01:53,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-15 00:01:53,649 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:01:53,650 INFO L422 BasicCegarLoop]: trace histogram [12, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:01:53,650 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-15 00:01:53,650 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:01:53,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:01:53,650 INFO L82 PathProgramCache]: Analyzing trace with hash 48534721, now seen corresponding path program 16 times [2020-10-15 00:01:53,651 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:01:53,651 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2014705067] [2020-10-15 00:01:53,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:01:53,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:01:53,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:53,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:53,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:53,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:54,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:54,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:54,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:54,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:54,927 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:01:54,928 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-15 00:01:54,928 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-15 00:01:54,928 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1268 [2020-10-15 00:01:54,928 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:01:54,928 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:01:54,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-15 00:01:54,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:01:54,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-15 00:01:54,929 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:01:55,198 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:01:55,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:01:55,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:55,200 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:01:55,201 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:01:55,201 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:01:55,201 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:01:55,201 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:01:55,201 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:01:55,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:01:55,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:01:55,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:01:55,202 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:01:55,204 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 88 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:01:55,204 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2014705067] [2020-10-15 00:01:55,204 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:01:55,204 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-15 00:01:55,205 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069242741] [2020-10-15 00:01:55,205 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-15 00:01:55,205 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:01:55,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-15 00:01:55,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2020-10-15 00:01:55,206 INFO L87 Difference]: Start difference. First operand 819 states and 1024 transitions. Second operand 16 states. [2020-10-15 00:01:56,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:01:56,018 INFO L93 Difference]: Finished difference Result 1079 states and 1444 transitions. [2020-10-15 00:01:56,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 00:01:56,020 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 32 [2020-10-15 00:01:56,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:01:56,024 INFO L225 Difference]: With dead ends: 1079 [2020-10-15 00:01:56,024 INFO L226 Difference]: Without dead ends: 1020 [2020-10-15 00:01:56,025 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2020-10-15 00:01:56,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1020 states. [2020-10-15 00:01:56,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1020 to 848. [2020-10-15 00:01:56,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 848 states. [2020-10-15 00:01:56,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 848 states to 848 states and 1066 transitions. [2020-10-15 00:01:56,061 INFO L78 Accepts]: Start accepts. Automaton has 848 states and 1066 transitions. Word has length 32 [2020-10-15 00:01:56,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:01:56,061 INFO L479 AbstractCegarLoop]: Abstraction has 848 states and 1066 transitions. [2020-10-15 00:01:56,061 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-15 00:01:56,061 INFO L276 IsEmpty]: Start isEmpty. Operand 848 states and 1066 transitions. [2020-10-15 00:01:56,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-15 00:01:56,063 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:01:56,063 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:01:56,063 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-15 00:01:56,063 INFO L427 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:01:56,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:01:56,063 INFO L82 PathProgramCache]: Analyzing trace with hash -1101509017, now seen corresponding path program 6 times [2020-10-15 00:01:56,064 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:01:56,064 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1582524757] [2020-10-15 00:01:56,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:01:56,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:01:56,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:56,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:56,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:56,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:57,190 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:01:57,191 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-15 00:01:57,191 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-15 00:01:57,191 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1118 [2020-10-15 00:01:57,191 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:01:57,191 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:01:57,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-15 00:01:57,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-15 00:01:57,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-15 00:01:57,192 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:01:57,470 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:01:57,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:01:57,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:57,472 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:01:57,473 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:01:57,473 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:01:57,473 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:01:57,474 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:01:57,474 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:01:57,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:01:57,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:01:57,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:01:57,475 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:01:57,480 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-10-15 00:01:57,480 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1582524757] [2020-10-15 00:01:57,480 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:01:57,480 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-15 00:01:57,481 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016912462] [2020-10-15 00:01:57,482 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-15 00:01:57,482 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:01:57,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-15 00:01:57,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-10-15 00:01:57,483 INFO L87 Difference]: Start difference. First operand 848 states and 1066 transitions. Second operand 12 states. [2020-10-15 00:01:57,731 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2020-10-15 00:02:01,047 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2020-10-15 00:02:05,717 WARN L193 SmtUtils]: Spent 500.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2020-10-15 00:02:13,864 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (+ c_main_~z~0 2))) (and (<= c_main_~y~0 (+ (* 4294967296 (div (+ c_main_~y~0 (- 4)) 4294967296)) 4294967298)) (<= c_main_~y~0 (+ (* 4294967296 (div (+ c_main_~y~0 (- 2)) 4294967296)) 4294967296)) (<= c_main_~y~0 .cse0) (<= c_main_~y~0 (+ (* 4294967296 (div (+ c_main_~y~0 (- 3)) 4294967296)) 4294967297)) (<= .cse0 c_main_~y~0) (<= c_main_~y~0 (+ (* 4294967296 (div (+ c_main_~y~0 (- 5)) 4294967296)) 4294967299)) (<= (+ (* 4294967296 (div c_main_~y~0 4294967296)) 1) c_main_~y~0))) is different from false [2020-10-15 00:02:14,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:02:14,109 INFO L93 Difference]: Finished difference Result 1114 states and 1370 transitions. [2020-10-15 00:02:14,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-15 00:02:14,110 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 33 [2020-10-15 00:02:14,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:02:14,114 INFO L225 Difference]: With dead ends: 1114 [2020-10-15 00:02:14,114 INFO L226 Difference]: Without dead ends: 947 [2020-10-15 00:02:14,116 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 338 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=263, Invalid=1221, Unknown=2, NotChecked=74, Total=1560 [2020-10-15 00:02:14,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 947 states. [2020-10-15 00:02:14,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 947 to 801. [2020-10-15 00:02:14,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 801 states. [2020-10-15 00:02:14,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 801 states to 801 states and 1004 transitions. [2020-10-15 00:02:14,147 INFO L78 Accepts]: Start accepts. Automaton has 801 states and 1004 transitions. Word has length 33 [2020-10-15 00:02:14,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:02:14,147 INFO L479 AbstractCegarLoop]: Abstraction has 801 states and 1004 transitions. [2020-10-15 00:02:14,147 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-15 00:02:14,147 INFO L276 IsEmpty]: Start isEmpty. Operand 801 states and 1004 transitions. [2020-10-15 00:02:14,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-15 00:02:14,149 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:02:14,149 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:02:14,149 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-15 00:02:14,149 INFO L427 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:02:14,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:02:14,150 INFO L82 PathProgramCache]: Analyzing trace with hash 1511589687, now seen corresponding path program 1 times [2020-10-15 00:02:14,150 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:02:14,150 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [172968183] [2020-10-15 00:02:14,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:02:14,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:02:14,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:14,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:14,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:14,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:14,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:14,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:15,985 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:02:15,986 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-15 00:02:15,986 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-15 00:02:15,986 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1827 [2020-10-15 00:02:15,986 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:02:15,986 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:02:15,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-15 00:02:15,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:02:15,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-15 00:02:15,986 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:02:16,320 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:02:16,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:02:16,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:16,322 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:02:16,323 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:02:16,323 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:02:16,323 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:02:16,323 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:02:16,323 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:02:16,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:02:16,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:02:16,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:02:16,324 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:02:16,326 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-15 00:02:16,326 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [172968183] [2020-10-15 00:02:16,326 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:02:16,327 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-15 00:02:16,327 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348609846] [2020-10-15 00:02:16,327 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-15 00:02:16,327 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:02:16,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-15 00:02:16,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2020-10-15 00:02:16,327 INFO L87 Difference]: Start difference. First operand 801 states and 1004 transitions. Second operand 18 states. [2020-10-15 00:02:17,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:02:17,087 INFO L93 Difference]: Finished difference Result 937 states and 1156 transitions. [2020-10-15 00:02:17,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 00:02:17,088 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 33 [2020-10-15 00:02:17,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:02:17,092 INFO L225 Difference]: With dead ends: 937 [2020-10-15 00:02:17,092 INFO L226 Difference]: Without dead ends: 904 [2020-10-15 00:02:17,093 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=45, Invalid=375, Unknown=0, NotChecked=0, Total=420 [2020-10-15 00:02:17,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 904 states. [2020-10-15 00:02:17,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 904 to 793. [2020-10-15 00:02:17,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 793 states. [2020-10-15 00:02:17,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 793 states to 793 states and 994 transitions. [2020-10-15 00:02:17,125 INFO L78 Accepts]: Start accepts. Automaton has 793 states and 994 transitions. Word has length 33 [2020-10-15 00:02:17,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:02:17,125 INFO L479 AbstractCegarLoop]: Abstraction has 793 states and 994 transitions. [2020-10-15 00:02:17,125 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-15 00:02:17,126 INFO L276 IsEmpty]: Start isEmpty. Operand 793 states and 994 transitions. [2020-10-15 00:02:17,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-15 00:02:17,127 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:02:17,127 INFO L422 BasicCegarLoop]: trace histogram [13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:02:17,127 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-15 00:02:17,127 INFO L427 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:02:17,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:02:17,128 INFO L82 PathProgramCache]: Analyzing trace with hash -772074185, now seen corresponding path program 2 times [2020-10-15 00:02:17,128 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:02:17,128 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1826427878] [2020-10-15 00:02:17,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:02:17,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:02:17,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:17,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:17,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:17,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:17,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:18,222 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:02:18,222 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-15 00:02:18,222 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-15 00:02:18,222 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1085 [2020-10-15 00:02:18,223 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:02:18,223 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:02:18,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-15 00:02:18,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:02:18,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-15 00:02:18,223 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:02:18,625 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:02:18,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:02:18,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:18,627 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:02:18,627 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:02:18,628 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:02:18,628 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:02:18,628 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:02:18,629 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:02:18,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:02:18,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:02:18,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:02:18,630 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:02:18,634 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-15 00:02:18,634 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1826427878] [2020-10-15 00:02:18,634 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:02:18,635 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-15 00:02:18,635 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320254627] [2020-10-15 00:02:18,635 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 00:02:18,635 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:02:18,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 00:02:18,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=239, Unknown=0, NotChecked=0, Total=272 [2020-10-15 00:02:18,636 INFO L87 Difference]: Start difference. First operand 793 states and 994 transitions. Second operand 17 states. [2020-10-15 00:02:19,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:02:19,997 INFO L93 Difference]: Finished difference Result 1063 states and 1432 transitions. [2020-10-15 00:02:19,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-15 00:02:19,998 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 33 [2020-10-15 00:02:19,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:02:20,002 INFO L225 Difference]: With dead ends: 1063 [2020-10-15 00:02:20,002 INFO L226 Difference]: Without dead ends: 1002 [2020-10-15 00:02:20,003 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=33, Invalid=239, Unknown=0, NotChecked=0, Total=272 [2020-10-15 00:02:20,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1002 states. [2020-10-15 00:02:20,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1002 to 821. [2020-10-15 00:02:20,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 821 states. [2020-10-15 00:02:20,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 821 states to 821 states and 1034 transitions. [2020-10-15 00:02:20,027 INFO L78 Accepts]: Start accepts. Automaton has 821 states and 1034 transitions. Word has length 33 [2020-10-15 00:02:20,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:02:20,028 INFO L479 AbstractCegarLoop]: Abstraction has 821 states and 1034 transitions. [2020-10-15 00:02:20,028 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 00:02:20,028 INFO L276 IsEmpty]: Start isEmpty. Operand 821 states and 1034 transitions. [2020-10-15 00:02:20,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-15 00:02:20,030 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:02:20,030 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:02:20,030 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-15 00:02:20,030 INFO L427 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:02:20,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:02:20,030 INFO L82 PathProgramCache]: Analyzing trace with hash -463659998, now seen corresponding path program 6 times [2020-10-15 00:02:20,031 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:02:20,031 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2022277572] [2020-10-15 00:02:20,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:02:20,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:02:20,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:20,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:20,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:20,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:20,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:21,583 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:02:21,583 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-15 00:02:21,583 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-15 00:02:21,583 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1544 [2020-10-15 00:02:21,583 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:02:21,583 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:02:21,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-15 00:02:21,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:02:21,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-15 00:02:21,584 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:02:21,938 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 16 [2020-10-15 00:02:22,891 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:02:22,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:02:22,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:22,893 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:02:22,893 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:02:22,894 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:02:22,894 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:02:22,894 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:02:22,894 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:02:22,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:02:22,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:02:22,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:02:22,895 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:02:22,899 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-15 00:02:22,899 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2022277572] [2020-10-15 00:02:22,899 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:02:22,899 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-15 00:02:22,899 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673415420] [2020-10-15 00:02:22,900 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-15 00:02:22,900 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:02:22,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-15 00:02:22,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=272, Unknown=0, NotChecked=0, Total=306 [2020-10-15 00:02:22,900 INFO L87 Difference]: Start difference. First operand 821 states and 1034 transitions. Second operand 18 states. [2020-10-15 00:02:23,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:02:23,472 INFO L93 Difference]: Finished difference Result 834 states and 1046 transitions. [2020-10-15 00:02:23,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-15 00:02:23,473 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 34 [2020-10-15 00:02:23,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:02:23,475 INFO L225 Difference]: With dead ends: 834 [2020-10-15 00:02:23,475 INFO L226 Difference]: Without dead ends: 813 [2020-10-15 00:02:23,477 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2020-10-15 00:02:23,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 813 states. [2020-10-15 00:02:23,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 813 to 813. [2020-10-15 00:02:23,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 813 states. [2020-10-15 00:02:23,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 813 states to 813 states and 1025 transitions. [2020-10-15 00:02:23,502 INFO L78 Accepts]: Start accepts. Automaton has 813 states and 1025 transitions. Word has length 34 [2020-10-15 00:02:23,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:02:23,502 INFO L479 AbstractCegarLoop]: Abstraction has 813 states and 1025 transitions. [2020-10-15 00:02:23,503 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-15 00:02:23,503 INFO L276 IsEmpty]: Start isEmpty. Operand 813 states and 1025 transitions. [2020-10-15 00:02:23,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-15 00:02:23,504 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:02:23,504 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:02:23,504 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-15 00:02:23,504 INFO L427 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:02:23,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:02:23,505 INFO L82 PathProgramCache]: Analyzing trace with hash -1550018097, now seen corresponding path program 1 times [2020-10-15 00:02:23,505 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:02:23,505 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2116901470] [2020-10-15 00:02:23,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:02:23,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:02:23,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:23,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:23,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:23,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:23,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:24,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:24,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:26,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:26,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:28,519 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:02:28,519 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-15 00:02:28,519 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-15 00:02:28,520 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-15 00:02:28,520 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:02:28,520 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:02:28,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-15 00:02:28,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:02:28,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-15 00:02:28,520 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:02:29,778 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:02:29,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:02:29,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:29,781 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:02:29,781 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:02:29,781 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:02:29,781 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:02:29,782 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:02:29,782 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:02:29,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:02:29,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:02:29,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:02:29,783 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:02:29,791 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-15 00:02:29,791 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2116901470] [2020-10-15 00:02:29,791 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:02:29,792 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-15 00:02:29,793 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924793101] [2020-10-15 00:02:29,794 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-15 00:02:29,794 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:02:29,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-15 00:02:29,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2020-10-15 00:02:29,796 INFO L87 Difference]: Start difference. First operand 813 states and 1025 transitions. Second operand 21 states.