/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=BIGGEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-examples/standard_copy8_ground-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-12 09:51:17,567 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-12 09:51:17,573 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-12 09:51:17,604 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-12 09:51:17,605 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-12 09:51:17,612 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-12 09:51:17,614 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-12 09:51:17,617 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-12 09:51:17,619 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-12 09:51:17,622 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-12 09:51:17,622 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-12 09:51:17,624 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-12 09:51:17,624 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-12 09:51:17,626 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-12 09:51:17,628 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-12 09:51:17,630 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-12 09:51:17,631 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-12 09:51:17,632 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-12 09:51:17,633 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-12 09:51:17,641 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-12 09:51:17,643 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-12 09:51:17,643 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-12 09:51:17,644 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-12 09:51:17,645 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-12 09:51:17,659 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-12 09:51:17,659 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-12 09:51:17,659 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-12 09:51:17,660 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-12 09:51:17,660 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-12 09:51:17,666 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-12 09:51:17,666 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-12 09:51:17,667 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-12 09:51:17,668 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-12 09:51:17,668 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-12 09:51:17,669 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-12 09:51:17,669 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-12 09:51:17,670 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-12 09:51:17,672 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-12 09:51:17,672 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-12 09:51:17,673 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-12 09:51:17,674 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-12 09:51:17,675 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-12 09:51:17,712 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-12 09:51:17,712 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-12 09:51:17,713 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-12 09:51:17,713 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-12 09:51:17,714 INFO L138 SettingsManager]: * Use SBE=true [2020-10-12 09:51:17,714 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-12 09:51:17,714 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-12 09:51:17,714 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-12 09:51:17,714 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-12 09:51:17,715 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-12 09:51:17,715 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-12 09:51:17,715 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-12 09:51:17,715 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-12 09:51:17,715 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-12 09:51:17,715 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-12 09:51:17,716 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-12 09:51:17,716 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-12 09:51:17,716 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-12 09:51:17,716 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-12 09:51:17,716 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-12 09:51:17,717 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-12 09:51:17,717 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-12 09:51:17,717 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-12 09:51:17,717 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-12 09:51:17,717 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-12 09:51:17,718 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-12 09:51:17,718 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-12 09:51:17,718 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-12 09:51:17,718 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-12 09:51:17,718 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; [2020-10-12 09:51:18,006 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-12 09:51:18,018 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-12 09:51:18,021 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-12 09:51:18,023 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-12 09:51:18,023 INFO L275 PluginConnector]: CDTParser initialized [2020-10-12 09:51:18,024 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_copy8_ground-1.i [2020-10-12 09:51:18,081 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/76ecb2b33/e6072f5bdada4c55a8f417329d257167/FLAGad7ed9bb8 [2020-10-12 09:51:18,495 INFO L306 CDTParser]: Found 1 translation units. [2020-10-12 09:51:18,496 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-examples/standard_copy8_ground-1.i [2020-10-12 09:51:18,503 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/76ecb2b33/e6072f5bdada4c55a8f417329d257167/FLAGad7ed9bb8 [2020-10-12 09:51:18,913 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/76ecb2b33/e6072f5bdada4c55a8f417329d257167 [2020-10-12 09:51:18,924 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-12 09:51:18,926 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-12 09:51:18,929 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-12 09:51:18,930 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-12 09:51:18,933 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-12 09:51:18,935 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 09:51:18" (1/1) ... [2020-10-12 09:51:18,937 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@17ca24e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:51:18, skipping insertion in model container [2020-10-12 09:51:18,938 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 09:51:18" (1/1) ... [2020-10-12 09:51:18,946 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-12 09:51:18,966 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-12 09:51:19,148 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 09:51:19,152 INFO L203 MainTranslator]: Completed pre-run [2020-10-12 09:51:19,182 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 09:51:19,284 INFO L208 MainTranslator]: Completed translation [2020-10-12 09:51:19,285 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:51:19 WrapperNode [2020-10-12 09:51:19,286 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-12 09:51:19,286 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-12 09:51:19,286 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-12 09:51:19,287 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-12 09:51:19,297 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:51:19" (1/1) ... [2020-10-12 09:51:19,297 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:51:19" (1/1) ... [2020-10-12 09:51:19,306 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:51:19" (1/1) ... [2020-10-12 09:51:19,307 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:51:19" (1/1) ... [2020-10-12 09:51:19,318 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:51:19" (1/1) ... [2020-10-12 09:51:19,327 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:51:19" (1/1) ... [2020-10-12 09:51:19,329 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:51:19" (1/1) ... [2020-10-12 09:51:19,331 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-12 09:51:19,332 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-12 09:51:19,332 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-12 09:51:19,332 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-12 09:51:19,333 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:51:19" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-12 09:51:19,402 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-12 09:51:19,402 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-12 09:51:19,403 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-12 09:51:19,403 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-12 09:51:19,403 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-12 09:51:19,403 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-12 09:51:19,403 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-12 09:51:19,403 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-12 09:51:19,403 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-12 09:51:19,404 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-12 09:51:19,404 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-12 09:51:19,404 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-12 09:51:19,404 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-12 09:51:19,404 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-12 09:51:19,788 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-12 09:51:19,788 INFO L295 CfgBuilder]: Removed 10 assume(true) statements. [2020-10-12 09:51:19,792 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 09:51:19 BoogieIcfgContainer [2020-10-12 09:51:19,793 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-12 09:51:19,794 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-12 09:51:19,794 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-12 09:51:19,797 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-12 09:51:19,797 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.10 09:51:18" (1/3) ... [2020-10-12 09:51:19,798 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4fcc0dd6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 09:51:19, skipping insertion in model container [2020-10-12 09:51:19,798 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:51:19" (2/3) ... [2020-10-12 09:51:19,799 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4fcc0dd6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 09:51:19, skipping insertion in model container [2020-10-12 09:51:19,799 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 09:51:19" (3/3) ... [2020-10-12 09:51:19,801 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_copy8_ground-1.i [2020-10-12 09:51:19,811 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-12 09:51:19,818 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-12 09:51:19,831 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-12 09:51:19,857 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-12 09:51:19,857 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-12 09:51:19,857 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-12 09:51:19,857 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-12 09:51:19,857 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-12 09:51:19,858 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-12 09:51:19,858 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-12 09:51:19,858 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-12 09:51:19,877 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states. [2020-10-12 09:51:19,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-12 09:51:19,884 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:51:19,885 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:51:19,885 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:51:19,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:51:19,893 INFO L82 PathProgramCache]: Analyzing trace with hash 661673386, now seen corresponding path program 1 times [2020-10-12 09:51:19,902 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:51:19,902 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [437043427] [2020-10-12 09:51:19,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:51:20,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:51:20,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:20,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:20,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:20,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:20,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:20,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:20,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:20,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:20,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:22,056 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:51:22,056 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-12 09:51:22,057 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-12 09:51:22,057 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2036 [2020-10-12 09:51:22,060 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:51:22,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 09:51:22,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-12 09:51:22,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 09:51:22,062 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-12 09:51:22,145 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:51:22,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:51:22,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:22,156 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:51:22,156 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:51:22,157 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:51:22,157 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 09:51:22,157 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:51:22,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:51:22,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:51:22,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:51:22,158 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:51:22,173 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:51:22,174 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [437043427] [2020-10-12 09:51:22,177 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 09:51:22,177 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-12 09:51:22,178 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603537325] [2020-10-12 09:51:22,184 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-12 09:51:22,185 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:51:22,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-12 09:51:22,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-12 09:51:22,203 INFO L87 Difference]: Start difference. First operand 48 states. Second operand 4 states. [2020-10-12 09:51:22,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:51:22,467 INFO L93 Difference]: Finished difference Result 104 states and 159 transitions. [2020-10-12 09:51:22,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-12 09:51:22,469 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 29 [2020-10-12 09:51:22,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:51:22,484 INFO L225 Difference]: With dead ends: 104 [2020-10-12 09:51:22,484 INFO L226 Difference]: Without dead ends: 59 [2020-10-12 09:51:22,489 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-12 09:51:22,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-12 09:51:22,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 51. [2020-10-12 09:51:22,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-12 09:51:22,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 60 transitions. [2020-10-12 09:51:22,547 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 60 transitions. Word has length 29 [2020-10-12 09:51:22,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:51:22,547 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 60 transitions. [2020-10-12 09:51:22,548 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-12 09:51:22,548 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 60 transitions. [2020-10-12 09:51:22,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-12 09:51:22,550 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:51:22,551 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:51:22,551 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-12 09:51:22,552 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:51:22,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:51:22,552 INFO L82 PathProgramCache]: Analyzing trace with hash -1500275198, now seen corresponding path program 1 times [2020-10-12 09:51:22,552 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:51:22,553 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1384454674] [2020-10-12 09:51:22,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:51:22,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:51:22,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:22,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:22,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:22,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:22,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:22,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:22,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:26,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:27,585 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:51:27,586 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-12 09:51:27,586 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 09:51:27,586 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-12 09:51:27,586 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:51:27,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-12 09:51:27,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 37 [2020-10-12 09:51:27,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-12 09:51:27,587 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:51:27,623 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:51:27,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:51:27,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:27,627 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:51:27,628 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:51:27,628 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:51:27,628 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 09:51:27,628 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:51:27,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:51:27,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:51:27,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:51:27,629 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:51:27,633 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-12 09:51:27,633 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1384454674] [2020-10-12 09:51:27,634 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:51:27,634 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-12 09:51:27,634 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610536033] [2020-10-12 09:51:27,636 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-12 09:51:27,636 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:51:27,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-12 09:51:27,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-12 09:51:27,637 INFO L87 Difference]: Start difference. First operand 51 states and 60 transitions. Second operand 5 states. [2020-10-12 09:51:27,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:51:27,829 INFO L93 Difference]: Finished difference Result 114 states and 138 transitions. [2020-10-12 09:51:27,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-12 09:51:27,829 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 45 [2020-10-12 09:51:27,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:51:27,831 INFO L225 Difference]: With dead ends: 114 [2020-10-12 09:51:27,831 INFO L226 Difference]: Without dead ends: 75 [2020-10-12 09:51:27,832 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-12 09:51:27,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-12 09:51:27,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 67. [2020-10-12 09:51:27,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-12 09:51:27,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 76 transitions. [2020-10-12 09:51:27,842 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 76 transitions. Word has length 45 [2020-10-12 09:51:27,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:51:27,843 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 76 transitions. [2020-10-12 09:51:27,843 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-12 09:51:27,843 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 76 transitions. [2020-10-12 09:51:27,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-12 09:51:27,845 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:51:27,845 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:51:27,846 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-12 09:51:27,846 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:51:27,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:51:27,846 INFO L82 PathProgramCache]: Analyzing trace with hash -1551791118, now seen corresponding path program 2 times [2020-10-12 09:51:27,847 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:51:27,847 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [942707423] [2020-10-12 09:51:27,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:51:27,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:51:27,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:27,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:27,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:27,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:27,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:27,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:29,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:32,880 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:51:32,881 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-12 09:51:32,881 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-12 09:51:32,882 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5022 [2020-10-12 09:51:32,882 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:51:32,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 09:51:32,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-12 09:51:32,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 09:51:32,884 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:51:32,947 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:51:32,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:51:32,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:32,953 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:51:32,953 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:51:32,953 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:51:32,954 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 09:51:32,957 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:51:32,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:51:32,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:51:32,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:51:32,958 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:51:32,967 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-10-12 09:51:32,968 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [942707423] [2020-10-12 09:51:32,968 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:51:32,969 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-12 09:51:32,969 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470942342] [2020-10-12 09:51:32,971 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 09:51:32,971 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:51:32,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 09:51:32,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-12 09:51:32,972 INFO L87 Difference]: Start difference. First operand 67 states and 76 transitions. Second operand 6 states. [2020-10-12 09:51:33,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:51:33,330 INFO L93 Difference]: Finished difference Result 144 states and 168 transitions. [2020-10-12 09:51:33,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-12 09:51:33,331 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 61 [2020-10-12 09:51:33,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:51:33,332 INFO L225 Difference]: With dead ends: 144 [2020-10-12 09:51:33,332 INFO L226 Difference]: Without dead ends: 91 [2020-10-12 09:51:33,333 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-12 09:51:33,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-12 09:51:33,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 83. [2020-10-12 09:51:33,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-12 09:51:33,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 92 transitions. [2020-10-12 09:51:33,351 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 92 transitions. Word has length 61 [2020-10-12 09:51:33,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:51:33,351 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 92 transitions. [2020-10-12 09:51:33,352 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 09:51:33,352 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 92 transitions. [2020-10-12 09:51:33,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-12 09:51:33,358 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:51:33,358 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:51:33,358 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-12 09:51:33,358 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:51:33,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:51:33,359 INFO L82 PathProgramCache]: Analyzing trace with hash 640965090, now seen corresponding path program 3 times [2020-10-12 09:51:33,359 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:51:33,359 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [442171867] [2020-10-12 09:51:33,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:51:33,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:51:33,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:33,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:33,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:33,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:33,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:33,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:36,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:38,400 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:51:38,400 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-12 09:51:38,400 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-12 09:51:38,401 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5020 [2020-10-12 09:51:38,401 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:51:38,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 09:51:38,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-12 09:51:38,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-12 09:51:38,403 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-12 09:51:38,472 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:51:38,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:51:38,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:38,478 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:51:38,478 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:51:38,478 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:51:38,479 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 09:51:38,479 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:51:38,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:51:38,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:51:38,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:51:38,480 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:51:38,491 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2020-10-12 09:51:38,491 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [442171867] [2020-10-12 09:51:38,492 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:51:38,492 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-12 09:51:38,493 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870485227] [2020-10-12 09:51:38,494 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 09:51:38,494 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:51:38,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 09:51:38,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-12 09:51:38,496 INFO L87 Difference]: Start difference. First operand 83 states and 92 transitions. Second operand 7 states. [2020-10-12 09:51:38,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:51:38,769 INFO L93 Difference]: Finished difference Result 174 states and 198 transitions. [2020-10-12 09:51:38,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-12 09:51:38,770 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 77 [2020-10-12 09:51:38,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:51:38,771 INFO L225 Difference]: With dead ends: 174 [2020-10-12 09:51:38,771 INFO L226 Difference]: Without dead ends: 107 [2020-10-12 09:51:38,777 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-12 09:51:38,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-12 09:51:38,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 99. [2020-10-12 09:51:38,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-12 09:51:38,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 108 transitions. [2020-10-12 09:51:38,793 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 108 transitions. Word has length 77 [2020-10-12 09:51:38,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:51:38,794 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 108 transitions. [2020-10-12 09:51:38,794 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 09:51:38,795 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 108 transitions. [2020-10-12 09:51:38,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-10-12 09:51:38,796 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:51:38,798 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:51:38,798 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-12 09:51:38,798 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:51:38,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:51:38,799 INFO L82 PathProgramCache]: Analyzing trace with hash 741083090, now seen corresponding path program 4 times [2020-10-12 09:51:38,799 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:51:38,799 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [33361376] [2020-10-12 09:51:38,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:51:38,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:51:38,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:38,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:38,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:38,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:38,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:39,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:43,819 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:51:43,820 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-12 09:51:43,820 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 09:51:43,820 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-12 09:51:43,820 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:51:43,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 09:51:43,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-12 09:51:43,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-12 09:51:43,821 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:51:43,902 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:51:43,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:51:43,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:43,905 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:51:43,906 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:51:43,906 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:51:43,906 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:51:43,906 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:51:43,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:51:43,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:51:43,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:51:43,907 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:51:43,918 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2020-10-12 09:51:43,918 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [33361376] [2020-10-12 09:51:43,919 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:51:43,919 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-12 09:51:43,919 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870511117] [2020-10-12 09:51:43,921 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 09:51:43,921 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:51:43,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 09:51:43,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-12 09:51:43,922 INFO L87 Difference]: Start difference. First operand 99 states and 108 transitions. Second operand 8 states. [2020-10-12 09:51:44,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:51:44,219 INFO L93 Difference]: Finished difference Result 204 states and 228 transitions. [2020-10-12 09:51:44,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-12 09:51:44,220 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 93 [2020-10-12 09:51:44,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:51:44,221 INFO L225 Difference]: With dead ends: 204 [2020-10-12 09:51:44,221 INFO L226 Difference]: Without dead ends: 123 [2020-10-12 09:51:44,222 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-12 09:51:44,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-10-12 09:51:44,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 115. [2020-10-12 09:51:44,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-10-12 09:51:44,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 124 transitions. [2020-10-12 09:51:44,239 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 124 transitions. Word has length 93 [2020-10-12 09:51:44,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:51:44,239 INFO L479 AbstractCegarLoop]: Abstraction has 115 states and 124 transitions. [2020-10-12 09:51:44,244 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 09:51:44,244 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 124 transitions. [2020-10-12 09:51:44,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-10-12 09:51:44,245 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:51:44,246 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:51:44,246 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-12 09:51:44,250 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:51:44,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:51:44,251 INFO L82 PathProgramCache]: Analyzing trace with hash -1226271294, now seen corresponding path program 5 times [2020-10-12 09:51:44,251 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:51:44,251 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [18813889] [2020-10-12 09:51:44,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:51:44,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:51:44,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:44,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:44,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:44,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:44,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:44,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:49,273 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:51:49,273 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 117 [2020-10-12 09:51:49,273 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 09:51:49,273 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-12 09:51:49,274 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:51:49,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-12 09:51:49,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 61 [2020-10-12 09:51:49,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-12 09:51:49,274 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:51:49,349 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:51:49,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:51:49,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:49,354 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:51:49,354 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:51:49,354 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:51:49,354 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 09:51:49,355 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:51:49,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:51:49,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:51:49,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:51:49,355 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:51:49,365 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2020-10-12 09:51:49,365 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [18813889] [2020-10-12 09:51:49,366 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:51:49,366 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-12 09:51:49,366 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815774720] [2020-10-12 09:51:49,367 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-12 09:51:49,368 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:51:49,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-12 09:51:49,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-12 09:51:49,368 INFO L87 Difference]: Start difference. First operand 115 states and 124 transitions. Second operand 9 states. [2020-10-12 09:51:49,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:51:49,727 INFO L93 Difference]: Finished difference Result 234 states and 258 transitions. [2020-10-12 09:51:49,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 09:51:49,727 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 109 [2020-10-12 09:51:49,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:51:49,729 INFO L225 Difference]: With dead ends: 234 [2020-10-12 09:51:49,729 INFO L226 Difference]: Without dead ends: 139 [2020-10-12 09:51:49,730 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-12 09:51:49,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-10-12 09:51:49,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 131. [2020-10-12 09:51:49,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-10-12 09:51:49,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 140 transitions. [2020-10-12 09:51:49,739 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 140 transitions. Word has length 109 [2020-10-12 09:51:49,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:51:49,740 INFO L479 AbstractCegarLoop]: Abstraction has 131 states and 140 transitions. [2020-10-12 09:51:49,740 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-12 09:51:49,740 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 140 transitions. [2020-10-12 09:51:49,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2020-10-12 09:51:49,742 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:51:49,742 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:51:49,742 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-12 09:51:49,742 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:51:49,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:51:49,743 INFO L82 PathProgramCache]: Analyzing trace with hash -873856078, now seen corresponding path program 6 times [2020-10-12 09:51:49,743 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:51:49,743 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [729506496] [2020-10-12 09:51:49,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:51:49,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:51:49,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:49,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:49,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:49,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:49,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:50,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:54,794 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:51:54,794 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 133 [2020-10-12 09:51:54,795 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 09:51:54,795 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5040 [2020-10-12 09:51:54,795 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:51:54,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 09:51:54,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 55 [2020-10-12 09:51:54,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-12 09:51:54,795 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:51:54,876 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:51:54,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:51:54,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:54,879 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:51:54,879 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:51:54,879 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:51:54,880 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:51:54,880 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:51:54,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:51:54,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:51:54,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:51:54,880 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:51:54,903 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked. [2020-10-12 09:51:54,904 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [729506496] [2020-10-12 09:51:54,904 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:51:54,904 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-12 09:51:54,906 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012182489] [2020-10-12 09:51:54,906 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-12 09:51:54,907 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:51:54,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-12 09:51:54,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-12 09:51:54,908 INFO L87 Difference]: Start difference. First operand 131 states and 140 transitions. Second operand 10 states. [2020-10-12 09:51:55,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:51:55,362 INFO L93 Difference]: Finished difference Result 264 states and 288 transitions. [2020-10-12 09:51:55,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-12 09:51:55,363 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 125 [2020-10-12 09:51:55,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:51:55,364 INFO L225 Difference]: With dead ends: 264 [2020-10-12 09:51:55,364 INFO L226 Difference]: Without dead ends: 155 [2020-10-12 09:51:55,366 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-12 09:51:55,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-10-12 09:51:55,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 147. [2020-10-12 09:51:55,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-10-12 09:51:55,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 156 transitions. [2020-10-12 09:51:55,395 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 156 transitions. Word has length 125 [2020-10-12 09:51:55,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:51:55,396 INFO L479 AbstractCegarLoop]: Abstraction has 147 states and 156 transitions. [2020-10-12 09:51:55,396 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-12 09:51:55,396 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 156 transitions. [2020-10-12 09:51:55,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2020-10-12 09:51:55,398 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:51:55,399 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:51:55,399 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-12 09:51:55,399 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:51:55,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:51:55,400 INFO L82 PathProgramCache]: Analyzing trace with hash 1957712290, now seen corresponding path program 7 times [2020-10-12 09:51:55,402 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:51:55,403 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2145456017] [2020-10-12 09:51:55,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:51:55,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:51:55,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:55,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:55,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:55,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:55,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:56,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:00,471 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:52:00,471 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 149 [2020-10-12 09:52:00,471 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 09:52:00,471 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5042 [2020-10-12 09:52:00,472 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:52:00,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 09:52:00,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 45 [2020-10-12 09:52:00,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-12 09:52:00,472 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:52:00,571 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:52:00,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:52:00,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:00,573 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:52:00,574 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:52:00,574 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:52:00,574 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:52:00,579 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:52:00,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:52:00,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:52:00,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:52:00,580 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:52:00,604 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 343 trivial. 0 not checked. [2020-10-12 09:52:00,606 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2145456017] [2020-10-12 09:52:00,606 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:52:00,606 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-12 09:52:00,606 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472208993] [2020-10-12 09:52:00,607 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-12 09:52:00,607 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:52:00,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-12 09:52:00,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-12 09:52:00,608 INFO L87 Difference]: Start difference. First operand 147 states and 156 transitions. Second operand 11 states. [2020-10-12 09:52:00,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:52:00,992 INFO L93 Difference]: Finished difference Result 294 states and 318 transitions. [2020-10-12 09:52:00,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-12 09:52:00,992 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 141 [2020-10-12 09:52:00,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:52:00,993 INFO L225 Difference]: With dead ends: 294 [2020-10-12 09:52:00,993 INFO L226 Difference]: Without dead ends: 171 [2020-10-12 09:52:00,999 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-12 09:52:00,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2020-10-12 09:52:01,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 163. [2020-10-12 09:52:01,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-12 09:52:01,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 172 transitions. [2020-10-12 09:52:01,013 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 172 transitions. Word has length 141 [2020-10-12 09:52:01,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:52:01,015 INFO L479 AbstractCegarLoop]: Abstraction has 163 states and 172 transitions. [2020-10-12 09:52:01,015 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-12 09:52:01,015 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 172 transitions. [2020-10-12 09:52:01,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2020-10-12 09:52:01,018 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:52:01,018 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:52:01,023 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-12 09:52:01,023 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:52:01,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:52:01,024 INFO L82 PathProgramCache]: Analyzing trace with hash -1095008366, now seen corresponding path program 8 times [2020-10-12 09:52:01,024 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:52:01,024 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [229155296] [2020-10-12 09:52:01,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:52:01,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:52:01,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:01,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:01,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:01,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:01,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:01,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:06,051 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:52:06,051 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 165 [2020-10-12 09:52:06,051 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 09:52:06,051 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-12 09:52:06,052 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:52:06,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-12 09:52:06,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 67 [2020-10-12 09:52:06,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-12 09:52:06,052 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:52:06,141 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:52:06,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:52:06,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:06,144 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:52:06,144 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:52:06,144 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:52:06,145 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:52:06,145 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:52:06,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:52:06,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:52:06,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:52:06,146 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:52:06,165 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 448 trivial. 0 not checked. [2020-10-12 09:52:06,165 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [229155296] [2020-10-12 09:52:06,166 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:52:06,166 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-12 09:52:06,166 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058164642] [2020-10-12 09:52:06,167 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-12 09:52:06,167 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:52:06,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-12 09:52:06,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-12 09:52:06,168 INFO L87 Difference]: Start difference. First operand 163 states and 172 transitions. Second operand 12 states. [2020-10-12 09:52:06,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:52:06,623 INFO L93 Difference]: Finished difference Result 324 states and 348 transitions. [2020-10-12 09:52:06,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-12 09:52:06,623 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 157 [2020-10-12 09:52:06,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:52:06,625 INFO L225 Difference]: With dead ends: 324 [2020-10-12 09:52:06,625 INFO L226 Difference]: Without dead ends: 187 [2020-10-12 09:52:06,626 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-12 09:52:06,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2020-10-12 09:52:06,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 179. [2020-10-12 09:52:06,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2020-10-12 09:52:06,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 188 transitions. [2020-10-12 09:52:06,634 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 188 transitions. Word has length 157 [2020-10-12 09:52:06,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:52:06,634 INFO L479 AbstractCegarLoop]: Abstraction has 179 states and 188 transitions. [2020-10-12 09:52:06,634 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-12 09:52:06,635 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 188 transitions. [2020-10-12 09:52:06,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2020-10-12 09:52:06,636 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:52:06,637 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:52:06,637 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-12 09:52:06,637 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:52:06,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:52:06,637 INFO L82 PathProgramCache]: Analyzing trace with hash -1148482174, now seen corresponding path program 9 times [2020-10-12 09:52:06,638 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:52:06,638 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [638344173] [2020-10-12 09:52:06,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:52:06,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:52:06,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:06,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:06,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:06,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:06,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:07,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:11,738 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:52:11,738 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 181 [2020-10-12 09:52:11,739 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 09:52:11,739 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5089 [2020-10-12 09:52:11,739 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:52:11,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-12 09:52:11,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 73 [2020-10-12 09:52:11,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-12 09:52:11,740 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:52:11,848 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:52:11,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:52:11,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:11,851 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:52:11,851 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:52:11,851 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:52:11,852 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:52:11,852 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:52:11,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:52:11,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:52:11,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:52:11,852 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:52:11,869 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 567 trivial. 0 not checked. [2020-10-12 09:52:11,869 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [638344173] [2020-10-12 09:52:11,869 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:52:11,869 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-12 09:52:11,870 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568149800] [2020-10-12 09:52:11,870 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-12 09:52:11,870 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:52:11,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-12 09:52:11,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-12 09:52:11,871 INFO L87 Difference]: Start difference. First operand 179 states and 188 transitions. Second operand 13 states. [2020-10-12 09:52:12,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:52:12,354 INFO L93 Difference]: Finished difference Result 354 states and 378 transitions. [2020-10-12 09:52:12,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-12 09:52:12,355 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 173 [2020-10-12 09:52:12,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:52:12,357 INFO L225 Difference]: With dead ends: 354 [2020-10-12 09:52:12,357 INFO L226 Difference]: Without dead ends: 203 [2020-10-12 09:52:12,359 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-12 09:52:12,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2020-10-12 09:52:12,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 195. [2020-10-12 09:52:12,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195 states. [2020-10-12 09:52:12,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 204 transitions. [2020-10-12 09:52:12,376 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 204 transitions. Word has length 173 [2020-10-12 09:52:12,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:52:12,376 INFO L479 AbstractCegarLoop]: Abstraction has 195 states and 204 transitions. [2020-10-12 09:52:12,376 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-12 09:52:12,376 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 204 transitions. [2020-10-12 09:52:12,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2020-10-12 09:52:12,379 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:52:12,379 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:52:12,380 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-12 09:52:12,380 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:52:12,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:52:12,382 INFO L82 PathProgramCache]: Analyzing trace with hash -2136966286, now seen corresponding path program 10 times [2020-10-12 09:52:12,382 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:52:12,382 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [318507771] [2020-10-12 09:52:12,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:52:12,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:52:12,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:12,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:12,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:12,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:12,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:13,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:17,471 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:52:17,471 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 197 [2020-10-12 09:52:17,471 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 09:52:17,471 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5068 [2020-10-12 09:52:17,471 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:52:17,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-12 09:52:17,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 35 [2020-10-12 09:52:17,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-12 09:52:17,472 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:52:17,589 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:52:17,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:52:17,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:17,591 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:52:17,591 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:52:17,592 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:52:17,592 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:52:17,592 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:52:17,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:52:17,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:52:17,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:52:17,592 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:52:17,606 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 700 trivial. 0 not checked. [2020-10-12 09:52:17,607 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [318507771] [2020-10-12 09:52:17,607 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:52:17,607 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-12 09:52:17,607 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166598749] [2020-10-12 09:52:17,608 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-12 09:52:17,608 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:52:17,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-12 09:52:17,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-12 09:52:17,608 INFO L87 Difference]: Start difference. First operand 195 states and 204 transitions. Second operand 14 states. [2020-10-12 09:52:18,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:52:18,078 INFO L93 Difference]: Finished difference Result 384 states and 408 transitions. [2020-10-12 09:52:18,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-12 09:52:18,079 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 189 [2020-10-12 09:52:18,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:52:18,082 INFO L225 Difference]: With dead ends: 384 [2020-10-12 09:52:18,083 INFO L226 Difference]: Without dead ends: 219 [2020-10-12 09:52:18,084 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-12 09:52:18,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2020-10-12 09:52:18,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 211. [2020-10-12 09:52:18,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 211 states. [2020-10-12 09:52:18,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 220 transitions. [2020-10-12 09:52:18,093 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 220 transitions. Word has length 189 [2020-10-12 09:52:18,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:52:18,093 INFO L479 AbstractCegarLoop]: Abstraction has 211 states and 220 transitions. [2020-10-12 09:52:18,093 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-12 09:52:18,093 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 220 transitions. [2020-10-12 09:52:18,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2020-10-12 09:52:18,095 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:52:18,096 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:52:18,096 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-12 09:52:18,096 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:52:18,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:52:18,097 INFO L82 PathProgramCache]: Analyzing trace with hash 662325602, now seen corresponding path program 11 times [2020-10-12 09:52:18,097 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:52:18,097 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [800900600] [2020-10-12 09:52:18,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:52:18,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:52:18,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:18,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:18,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:18,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:18,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:18,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:23,139 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:52:23,140 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 213 [2020-10-12 09:52:23,140 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 09:52:23,140 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5029 [2020-10-12 09:52:23,140 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:52:23,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-12 09:52:23,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 85 [2020-10-12 09:52:23,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-12 09:52:23,141 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:52:23,297 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:52:23,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:52:23,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:23,300 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:52:23,301 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:52:23,301 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:52:23,301 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:52:23,301 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:52:23,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:52:23,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:52:23,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:52:23,302 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:52:23,318 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 847 trivial. 0 not checked. [2020-10-12 09:52:23,318 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [800900600] [2020-10-12 09:52:23,318 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:52:23,319 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-12 09:52:23,319 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502395467] [2020-10-12 09:52:23,319 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-12 09:52:23,319 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:52:23,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-12 09:52:23,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-12 09:52:23,320 INFO L87 Difference]: Start difference. First operand 211 states and 220 transitions. Second operand 15 states. [2020-10-12 09:52:23,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:52:23,890 INFO L93 Difference]: Finished difference Result 414 states and 438 transitions. [2020-10-12 09:52:23,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-12 09:52:23,890 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 205 [2020-10-12 09:52:23,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:52:23,892 INFO L225 Difference]: With dead ends: 414 [2020-10-12 09:52:23,893 INFO L226 Difference]: Without dead ends: 235 [2020-10-12 09:52:23,893 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-12 09:52:23,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2020-10-12 09:52:23,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 227. [2020-10-12 09:52:23,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 227 states. [2020-10-12 09:52:23,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 236 transitions. [2020-10-12 09:52:23,901 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 236 transitions. Word has length 205 [2020-10-12 09:52:23,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:52:23,902 INFO L479 AbstractCegarLoop]: Abstraction has 227 states and 236 transitions. [2020-10-12 09:52:23,902 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-12 09:52:23,902 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 236 transitions. [2020-10-12 09:52:23,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2020-10-12 09:52:23,904 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:52:23,905 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:52:23,905 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-12 09:52:23,905 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:52:23,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:52:23,905 INFO L82 PathProgramCache]: Analyzing trace with hash -845613230, now seen corresponding path program 12 times [2020-10-12 09:52:23,906 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:52:23,906 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [617058817] [2020-10-12 09:52:23,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:52:23,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:52:23,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:23,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:23,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:23,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:24,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:28,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:29,046 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:52:29,046 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 229 [2020-10-12 09:52:29,047 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 09:52:29,047 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5127 [2020-10-12 09:52:29,047 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:52:29,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-12 09:52:29,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 09:52:29,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-12 09:52:29,047 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:52:29,200 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:52:29,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:52:29,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:29,203 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:52:29,204 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:52:29,204 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:52:29,204 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:52:29,204 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:52:29,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:52:29,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:52:29,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:52:29,205 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:52:29,231 INFO L134 CoverageAnalysis]: Checked inductivity of 1152 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 1008 trivial. 0 not checked. [2020-10-12 09:52:29,232 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [617058817] [2020-10-12 09:52:29,232 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:52:29,232 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-12 09:52:29,233 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688036413] [2020-10-12 09:52:29,233 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-12 09:52:29,233 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:52:29,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-12 09:52:29,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-12 09:52:29,234 INFO L87 Difference]: Start difference. First operand 227 states and 236 transitions. Second operand 16 states. [2020-10-12 09:52:29,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:52:29,806 INFO L93 Difference]: Finished difference Result 444 states and 468 transitions. [2020-10-12 09:52:29,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-12 09:52:29,806 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 221 [2020-10-12 09:52:29,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:52:29,809 INFO L225 Difference]: With dead ends: 444 [2020-10-12 09:52:29,809 INFO L226 Difference]: Without dead ends: 251 [2020-10-12 09:52:29,810 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-12 09:52:29,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2020-10-12 09:52:29,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 243. [2020-10-12 09:52:29,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 243 states. [2020-10-12 09:52:29,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 252 transitions. [2020-10-12 09:52:29,819 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 252 transitions. Word has length 221 [2020-10-12 09:52:29,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:52:29,819 INFO L479 AbstractCegarLoop]: Abstraction has 243 states and 252 transitions. [2020-10-12 09:52:29,820 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-12 09:52:29,820 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 252 transitions. [2020-10-12 09:52:29,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2020-10-12 09:52:29,822 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:52:29,822 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:52:29,823 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-12 09:52:29,823 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:52:29,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:52:29,823 INFO L82 PathProgramCache]: Analyzing trace with hash -1803778750, now seen corresponding path program 13 times [2020-10-12 09:52:29,823 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:52:29,824 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [988123322] [2020-10-12 09:52:29,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:52:29,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:52:29,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:29,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:29,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:29,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:29,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:33,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:34,966 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:52:34,967 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 245 [2020-10-12 09:52:34,967 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 09:52:34,967 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5129 [2020-10-12 09:52:34,967 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:52:34,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-12 09:52:34,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 69 [2020-10-12 09:52:34,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-12 09:52:34,968 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:52:35,157 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:52:35,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:52:35,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:35,160 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:52:35,160 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:52:35,160 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:52:35,160 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:52:35,161 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:52:35,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:52:35,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:52:35,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:52:35,161 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:52:35,183 INFO L134 CoverageAnalysis]: Checked inductivity of 1352 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 1183 trivial. 0 not checked. [2020-10-12 09:52:35,183 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [988123322] [2020-10-12 09:52:35,184 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:52:35,184 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-12 09:52:35,184 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050970980] [2020-10-12 09:52:35,184 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-12 09:52:35,184 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:52:35,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-12 09:52:35,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-12 09:52:35,185 INFO L87 Difference]: Start difference. First operand 243 states and 252 transitions. Second operand 17 states. [2020-10-12 09:52:35,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:52:35,818 INFO L93 Difference]: Finished difference Result 474 states and 498 transitions. [2020-10-12 09:52:35,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-12 09:52:35,818 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 237 [2020-10-12 09:52:35,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:52:35,823 INFO L225 Difference]: With dead ends: 474 [2020-10-12 09:52:35,823 INFO L226 Difference]: Without dead ends: 267 [2020-10-12 09:52:35,824 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-12 09:52:35,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2020-10-12 09:52:35,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 259. [2020-10-12 09:52:35,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 259 states. [2020-10-12 09:52:35,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 268 transitions. [2020-10-12 09:52:35,845 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 268 transitions. Word has length 237 [2020-10-12 09:52:35,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:52:35,846 INFO L479 AbstractCegarLoop]: Abstraction has 259 states and 268 transitions. [2020-10-12 09:52:35,846 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-12 09:52:35,846 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 268 transitions. [2020-10-12 09:52:35,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2020-10-12 09:52:35,848 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:52:35,848 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:52:35,851 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-12 09:52:35,851 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:52:35,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:52:35,852 INFO L82 PathProgramCache]: Analyzing trace with hash -1583025358, now seen corresponding path program 14 times [2020-10-12 09:52:35,852 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:52:35,852 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2073825651] [2020-10-12 09:52:35,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:52:35,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:52:35,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:35,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:35,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:35,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:35,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:39,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:40,888 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:52:40,888 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 261 [2020-10-12 09:52:40,888 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 09:52:40,888 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5020 [2020-10-12 09:52:40,889 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:52:40,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-12 09:52:40,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 73 [2020-10-12 09:52:40,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-12 09:52:40,889 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:52:41,073 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:52:41,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:52:41,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:41,076 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:52:41,076 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:52:41,077 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:52:41,077 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:52:41,077 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:52:41,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:52:41,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:52:41,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:52:41,077 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:52:41,102 INFO L134 CoverageAnalysis]: Checked inductivity of 1568 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 1372 trivial. 0 not checked. [2020-10-12 09:52:41,103 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2073825651] [2020-10-12 09:52:41,103 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:52:41,103 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-12 09:52:41,103 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642171619] [2020-10-12 09:52:41,104 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-12 09:52:41,104 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:52:41,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-12 09:52:41,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-12 09:52:41,105 INFO L87 Difference]: Start difference. First operand 259 states and 268 transitions. Second operand 18 states. [2020-10-12 09:52:41,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:52:41,774 INFO L93 Difference]: Finished difference Result 504 states and 528 transitions. [2020-10-12 09:52:41,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-12 09:52:41,774 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 253 [2020-10-12 09:52:41,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:52:41,777 INFO L225 Difference]: With dead ends: 504 [2020-10-12 09:52:41,777 INFO L226 Difference]: Without dead ends: 283 [2020-10-12 09:52:41,778 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-12 09:52:41,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2020-10-12 09:52:41,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 275. [2020-10-12 09:52:41,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 275 states. [2020-10-12 09:52:41,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 284 transitions. [2020-10-12 09:52:41,789 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 284 transitions. Word has length 253 [2020-10-12 09:52:41,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:52:41,789 INFO L479 AbstractCegarLoop]: Abstraction has 275 states and 284 transitions. [2020-10-12 09:52:41,789 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-12 09:52:41,789 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 284 transitions. [2020-10-12 09:52:41,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 270 [2020-10-12 09:52:41,791 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:52:41,791 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:52:41,791 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-12 09:52:41,792 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:52:41,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:52:41,792 INFO L82 PathProgramCache]: Analyzing trace with hash 512901410, now seen corresponding path program 15 times [2020-10-12 09:52:41,792 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:52:41,792 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1451096232] [2020-10-12 09:52:41,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:52:41,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:52:41,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:41,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:41,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:41,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:41,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:45,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:46,919 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:52:46,919 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 277 [2020-10-12 09:52:46,919 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 09:52:46,919 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5111 [2020-10-12 09:52:46,919 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:52:46,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-12 09:52:46,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 45 [2020-10-12 09:52:46,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-12 09:52:46,920 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:52:47,126 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:52:47,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:52:47,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:47,129 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:52:47,129 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:52:47,129 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:52:47,129 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:52:47,130 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:52:47,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:52:47,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:52:47,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:52:47,130 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:52:47,156 INFO L134 CoverageAnalysis]: Checked inductivity of 1800 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 1575 trivial. 0 not checked. [2020-10-12 09:52:47,157 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1451096232] [2020-10-12 09:52:47,157 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:52:47,157 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-12 09:52:47,157 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614656964] [2020-10-12 09:52:47,158 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-12 09:52:47,158 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:52:47,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-12 09:52:47,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-12 09:52:47,159 INFO L87 Difference]: Start difference. First operand 275 states and 284 transitions. Second operand 19 states. [2020-10-12 09:52:47,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:52:47,851 INFO L93 Difference]: Finished difference Result 534 states and 558 transitions. [2020-10-12 09:52:47,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-12 09:52:47,852 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 269 [2020-10-12 09:52:47,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:52:47,854 INFO L225 Difference]: With dead ends: 534 [2020-10-12 09:52:47,854 INFO L226 Difference]: Without dead ends: 299 [2020-10-12 09:52:47,855 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-12 09:52:47,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2020-10-12 09:52:47,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 291. [2020-10-12 09:52:47,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 291 states. [2020-10-12 09:52:47,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 300 transitions. [2020-10-12 09:52:47,864 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 300 transitions. Word has length 269 [2020-10-12 09:52:47,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:52:47,865 INFO L479 AbstractCegarLoop]: Abstraction has 291 states and 300 transitions. [2020-10-12 09:52:47,865 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-12 09:52:47,865 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 300 transitions. [2020-10-12 09:52:47,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 286 [2020-10-12 09:52:47,866 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:52:47,866 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:52:47,867 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-12 09:52:47,867 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:52:47,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:52:47,867 INFO L82 PathProgramCache]: Analyzing trace with hash 952397586, now seen corresponding path program 16 times [2020-10-12 09:52:47,867 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:52:47,867 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2018177404] [2020-10-12 09:52:47,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:52:47,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:52:47,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:47,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:47,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:47,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:48,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:48,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:53,018 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:52:53,018 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 293 [2020-10-12 09:52:53,019 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 09:52:53,019 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5136 [2020-10-12 09:52:53,019 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:52:53,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-12 09:52:53,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 47 [2020-10-12 09:52:53,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-12 09:52:53,019 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:52:53,252 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:52:53,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:52:53,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:53,255 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:52:53,255 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:52:53,255 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:52:53,255 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:52:53,255 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:52:53,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:52:53,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:52:53,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:52:53,256 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:52:53,286 INFO L134 CoverageAnalysis]: Checked inductivity of 2048 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 1792 trivial. 0 not checked. [2020-10-12 09:52:53,286 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2018177404] [2020-10-12 09:52:53,287 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:52:53,287 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-12 09:52:53,287 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824701535] [2020-10-12 09:52:53,288 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-12 09:52:53,288 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:52:53,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-12 09:52:53,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-12 09:52:53,288 INFO L87 Difference]: Start difference. First operand 291 states and 300 transitions. Second operand 20 states. [2020-10-12 09:52:54,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:52:54,084 INFO L93 Difference]: Finished difference Result 564 states and 588 transitions. [2020-10-12 09:52:54,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-12 09:52:54,085 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 285 [2020-10-12 09:52:54,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:52:54,087 INFO L225 Difference]: With dead ends: 564 [2020-10-12 09:52:54,087 INFO L226 Difference]: Without dead ends: 315 [2020-10-12 09:52:54,088 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-12 09:52:54,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2020-10-12 09:52:54,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 307. [2020-10-12 09:52:54,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 307 states. [2020-10-12 09:52:54,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 316 transitions. [2020-10-12 09:52:54,098 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 316 transitions. Word has length 285 [2020-10-12 09:52:54,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:52:54,098 INFO L479 AbstractCegarLoop]: Abstraction has 307 states and 316 transitions. [2020-10-12 09:52:54,098 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-12 09:52:54,099 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 316 transitions. [2020-10-12 09:52:54,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 302 [2020-10-12 09:52:54,101 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:52:54,101 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:52:54,101 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-12 09:52:54,101 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:52:54,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:52:54,102 INFO L82 PathProgramCache]: Analyzing trace with hash 565935362, now seen corresponding path program 17 times [2020-10-12 09:52:54,102 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:52:54,102 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [456354897] [2020-10-12 09:52:54,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:52:54,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:52:54,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:54,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:54,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:54,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:54,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:59,166 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:52:59,167 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 309 [2020-10-12 09:52:59,167 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 09:52:59,167 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5044 [2020-10-12 09:52:59,167 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:52:59,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-12 09:52:59,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 09:52:59,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-12 09:52:59,168 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:52:59,420 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:52:59,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:52:59,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:59,423 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:52:59,424 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:52:59,424 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:52:59,424 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:52:59,425 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:52:59,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:52:59,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:52:59,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:52:59,425 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:52:59,457 INFO L134 CoverageAnalysis]: Checked inductivity of 2312 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 2023 trivial. 0 not checked. [2020-10-12 09:52:59,457 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [456354897] [2020-10-12 09:52:59,457 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:52:59,457 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-12 09:52:59,458 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307801402] [2020-10-12 09:52:59,458 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-12 09:52:59,458 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:52:59,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-12 09:52:59,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-12 09:52:59,459 INFO L87 Difference]: Start difference. First operand 307 states and 316 transitions. Second operand 21 states. [2020-10-12 09:53:00,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:53:00,355 INFO L93 Difference]: Finished difference Result 594 states and 618 transitions. [2020-10-12 09:53:00,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-12 09:53:00,356 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 301 [2020-10-12 09:53:00,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:53:00,358 INFO L225 Difference]: With dead ends: 594 [2020-10-12 09:53:00,359 INFO L226 Difference]: Without dead ends: 331 [2020-10-12 09:53:00,363 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-12 09:53:00,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2020-10-12 09:53:00,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 323. [2020-10-12 09:53:00,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 323 states. [2020-10-12 09:53:00,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 332 transitions. [2020-10-12 09:53:00,376 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 332 transitions. Word has length 301 [2020-10-12 09:53:00,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:53:00,378 INFO L479 AbstractCegarLoop]: Abstraction has 323 states and 332 transitions. [2020-10-12 09:53:00,378 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-12 09:53:00,379 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 332 transitions. [2020-10-12 09:53:00,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 318 [2020-10-12 09:53:00,382 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:53:00,382 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:53:00,383 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-12 09:53:00,383 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:53:00,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:53:00,383 INFO L82 PathProgramCache]: Analyzing trace with hash 251095794, now seen corresponding path program 18 times [2020-10-12 09:53:00,384 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:53:00,384 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1744022778] [2020-10-12 09:53:00,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:53:00,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:53:00,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:00,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:00,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:00,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:00,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:00,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:05,436 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:53:05,436 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 325 [2020-10-12 09:53:05,436 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 09:53:05,436 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5028 [2020-10-12 09:53:05,436 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:53:05,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-12 09:53:05,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 127 [2020-10-12 09:53:05,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-12 09:53:05,437 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:53:05,724 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:53:05,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:53:05,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:05,727 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:53:05,727 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:53:05,727 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:53:05,727 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 09:53:05,727 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:53:05,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:53:05,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:53:05,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:53:05,728 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:53:05,763 INFO L134 CoverageAnalysis]: Checked inductivity of 2592 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 2268 trivial. 0 not checked. [2020-10-12 09:53:05,763 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1744022778] [2020-10-12 09:53:05,763 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:53:05,764 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-12 09:53:05,764 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277266726] [2020-10-12 09:53:05,764 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-12 09:53:05,764 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:53:05,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-12 09:53:05,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-12 09:53:05,765 INFO L87 Difference]: Start difference. First operand 323 states and 332 transitions. Second operand 22 states. [2020-10-12 09:53:06,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:53:06,527 INFO L93 Difference]: Finished difference Result 624 states and 648 transitions. [2020-10-12 09:53:06,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-12 09:53:06,528 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 317 [2020-10-12 09:53:06,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:53:06,530 INFO L225 Difference]: With dead ends: 624 [2020-10-12 09:53:06,530 INFO L226 Difference]: Without dead ends: 347 [2020-10-12 09:53:06,531 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-12 09:53:06,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2020-10-12 09:53:06,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 339. [2020-10-12 09:53:06,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 339 states. [2020-10-12 09:53:06,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 348 transitions. [2020-10-12 09:53:06,543 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 348 transitions. Word has length 317 [2020-10-12 09:53:06,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:53:06,544 INFO L479 AbstractCegarLoop]: Abstraction has 339 states and 348 transitions. [2020-10-12 09:53:06,544 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-12 09:53:06,544 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 348 transitions. [2020-10-12 09:53:06,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 334 [2020-10-12 09:53:06,546 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:53:06,547 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:53:06,547 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-12 09:53:06,547 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:53:06,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:53:06,547 INFO L82 PathProgramCache]: Analyzing trace with hash 972568802, now seen corresponding path program 19 times [2020-10-12 09:53:06,548 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:53:06,548 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [70553384] [2020-10-12 09:53:06,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:53:06,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:53:06,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:06,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:06,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:06,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:06,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:11,924 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:53:11,925 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 341 [2020-10-12 09:53:11,925 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 09:53:11,925 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5358 [2020-10-12 09:53:11,925 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:53:11,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-12 09:53:11,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 09:53:11,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-12 09:53:11,925 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:53:12,336 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:53:12,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:53:12,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:12,340 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:53:12,340 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:53:12,340 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:53:12,341 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:53:12,341 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:53:12,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:53:12,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:53:12,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:53:12,342 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:53:12,453 INFO L134 CoverageAnalysis]: Checked inductivity of 2888 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 2527 trivial. 0 not checked. [2020-10-12 09:53:12,453 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [70553384] [2020-10-12 09:53:12,454 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:53:12,454 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-12 09:53:12,454 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497512373] [2020-10-12 09:53:12,457 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-12 09:53:12,458 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:53:12,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-12 09:53:12,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-12 09:53:12,459 INFO L87 Difference]: Start difference. First operand 339 states and 348 transitions. Second operand 23 states. [2020-10-12 09:53:13,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:53:13,449 INFO L93 Difference]: Finished difference Result 654 states and 678 transitions. [2020-10-12 09:53:13,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-12 09:53:13,449 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 333 [2020-10-12 09:53:13,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:53:13,451 INFO L225 Difference]: With dead ends: 654 [2020-10-12 09:53:13,451 INFO L226 Difference]: Without dead ends: 363 [2020-10-12 09:53:13,453 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-12 09:53:13,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2020-10-12 09:53:13,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 355. [2020-10-12 09:53:13,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 355 states. [2020-10-12 09:53:13,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 364 transitions. [2020-10-12 09:53:13,464 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 364 transitions. Word has length 333 [2020-10-12 09:53:13,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:53:13,464 INFO L479 AbstractCegarLoop]: Abstraction has 355 states and 364 transitions. [2020-10-12 09:53:13,465 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-12 09:53:13,465 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 364 transitions. [2020-10-12 09:53:13,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 350 [2020-10-12 09:53:13,467 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:53:13,467 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:53:13,468 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-12 09:53:13,468 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:53:13,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:53:13,468 INFO L82 PathProgramCache]: Analyzing trace with hash -532814126, now seen corresponding path program 20 times [2020-10-12 09:53:13,468 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:53:13,469 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [542411238] [2020-10-12 09:53:13,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:53:13,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:53:13,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:13,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:13,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:13,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:13,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:18,578 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:53:18,578 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 357 [2020-10-12 09:53:18,578 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 09:53:18,579 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5087 [2020-10-12 09:53:18,579 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:53:18,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-12 09:53:18,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 55 [2020-10-12 09:53:18,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-12 09:53:18,579 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:53:18,955 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:53:18,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:53:18,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:18,957 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:53:18,957 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:53:18,957 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:53:18,958 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:53:18,958 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:53:18,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:53:18,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:53:18,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:53:18,959 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:53:19,026 INFO L134 CoverageAnalysis]: Checked inductivity of 3200 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 2800 trivial. 0 not checked. [2020-10-12 09:53:19,027 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [542411238] [2020-10-12 09:53:19,027 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:53:19,027 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-12 09:53:19,028 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129543599] [2020-10-12 09:53:19,028 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-12 09:53:19,029 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:53:19,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-12 09:53:19,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-12 09:53:19,029 INFO L87 Difference]: Start difference. First operand 355 states and 364 transitions. Second operand 24 states. [2020-10-12 09:53:19,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:53:19,943 INFO L93 Difference]: Finished difference Result 684 states and 708 transitions. [2020-10-12 09:53:19,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-12 09:53:19,943 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 349 [2020-10-12 09:53:19,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:53:19,946 INFO L225 Difference]: With dead ends: 684 [2020-10-12 09:53:19,946 INFO L226 Difference]: Without dead ends: 379 [2020-10-12 09:53:19,947 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-12 09:53:19,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2020-10-12 09:53:19,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 371. [2020-10-12 09:53:19,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 371 states. [2020-10-12 09:53:19,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 371 states to 371 states and 380 transitions. [2020-10-12 09:53:19,961 INFO L78 Accepts]: Start accepts. Automaton has 371 states and 380 transitions. Word has length 349 [2020-10-12 09:53:19,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:53:19,961 INFO L479 AbstractCegarLoop]: Abstraction has 371 states and 380 transitions. [2020-10-12 09:53:19,961 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-12 09:53:19,961 INFO L276 IsEmpty]: Start isEmpty. Operand 371 states and 380 transitions. [2020-10-12 09:53:19,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 366 [2020-10-12 09:53:19,964 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:53:19,964 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:53:19,964 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-12 09:53:19,964 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:53:19,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:53:19,965 INFO L82 PathProgramCache]: Analyzing trace with hash 1128821954, now seen corresponding path program 21 times [2020-10-12 09:53:19,965 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:53:19,966 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [311818853] [2020-10-12 09:53:19,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:53:19,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:53:19,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:19,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:20,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:20,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:20,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:20,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:26,212 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:53:26,212 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 373 [2020-10-12 09:53:26,213 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 09:53:26,213 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6230 [2020-10-12 09:53:26,213 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:53:26,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-12 09:53:26,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 09:53:26,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-12 09:53:26,213 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:53:26,578 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:53:26,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:53:26,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:26,580 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:53:26,580 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:53:26,580 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:53:26,581 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:53:26,581 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:53:26,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:53:26,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:53:26,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:53:26,581 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:53:26,630 INFO L134 CoverageAnalysis]: Checked inductivity of 3528 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 3087 trivial. 0 not checked. [2020-10-12 09:53:26,631 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [311818853] [2020-10-12 09:53:26,631 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:53:26,631 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-12 09:53:26,631 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244983766] [2020-10-12 09:53:26,632 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-12 09:53:26,632 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:53:26,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-12 09:53:26,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-12 09:53:26,633 INFO L87 Difference]: Start difference. First operand 371 states and 380 transitions. Second operand 25 states. [2020-10-12 09:53:27,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:53:27,589 INFO L93 Difference]: Finished difference Result 714 states and 738 transitions. [2020-10-12 09:53:27,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-12 09:53:27,590 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 365 [2020-10-12 09:53:27,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:53:27,593 INFO L225 Difference]: With dead ends: 714 [2020-10-12 09:53:27,593 INFO L226 Difference]: Without dead ends: 395 [2020-10-12 09:53:27,594 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-12 09:53:27,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states. [2020-10-12 09:53:27,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 387. [2020-10-12 09:53:27,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 387 states. [2020-10-12 09:53:27,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 396 transitions. [2020-10-12 09:53:27,605 INFO L78 Accepts]: Start accepts. Automaton has 387 states and 396 transitions. Word has length 365 [2020-10-12 09:53:27,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:53:27,606 INFO L479 AbstractCegarLoop]: Abstraction has 387 states and 396 transitions. [2020-10-12 09:53:27,606 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-12 09:53:27,606 INFO L276 IsEmpty]: Start isEmpty. Operand 387 states and 396 transitions. [2020-10-12 09:53:27,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 382 [2020-10-12 09:53:27,608 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:53:27,609 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:53:27,609 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-12 09:53:27,609 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:53:27,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:53:27,609 INFO L82 PathProgramCache]: Analyzing trace with hash -1466441038, now seen corresponding path program 22 times [2020-10-12 09:53:27,610 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:53:27,618 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1812666179] [2020-10-12 09:53:27,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:53:27,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:53:27,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:27,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:27,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:27,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:27,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:33,001 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:53:33,001 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 389 [2020-10-12 09:53:33,001 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 09:53:33,001 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5362 [2020-10-12 09:53:33,002 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:53:33,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-12 09:53:33,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 151 [2020-10-12 09:53:33,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-12 09:53:33,002 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:53:33,405 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:53:33,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:53:33,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:33,408 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:53:33,408 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:53:33,408 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:53:33,409 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:53:33,409 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:53:33,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:53:33,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:53:33,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:53:33,409 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:53:33,464 INFO L134 CoverageAnalysis]: Checked inductivity of 3872 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 3388 trivial. 0 not checked. [2020-10-12 09:53:33,464 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1812666179] [2020-10-12 09:53:33,464 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:53:33,464 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-12 09:53:33,465 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218126682] [2020-10-12 09:53:33,465 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-12 09:53:33,465 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:53:33,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-12 09:53:33,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-12 09:53:33,466 INFO L87 Difference]: Start difference. First operand 387 states and 396 transitions. Second operand 26 states. [2020-10-12 09:53:34,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:53:34,479 INFO L93 Difference]: Finished difference Result 744 states and 768 transitions. [2020-10-12 09:53:34,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-12 09:53:34,479 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 381 [2020-10-12 09:53:34,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:53:34,481 INFO L225 Difference]: With dead ends: 744 [2020-10-12 09:53:34,482 INFO L226 Difference]: Without dead ends: 411 [2020-10-12 09:53:34,483 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-12 09:53:34,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 411 states. [2020-10-12 09:53:34,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 411 to 403. [2020-10-12 09:53:34,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 403 states. [2020-10-12 09:53:34,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 412 transitions. [2020-10-12 09:53:34,493 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 412 transitions. Word has length 381 [2020-10-12 09:53:34,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:53:34,494 INFO L479 AbstractCegarLoop]: Abstraction has 403 states and 412 transitions. [2020-10-12 09:53:34,494 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-12 09:53:34,494 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 412 transitions. [2020-10-12 09:53:34,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 398 [2020-10-12 09:53:34,496 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:53:34,497 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:53:34,497 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-12 09:53:34,497 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:53:34,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:53:34,498 INFO L82 PathProgramCache]: Analyzing trace with hash 1504456866, now seen corresponding path program 23 times [2020-10-12 09:53:34,498 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:53:34,498 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1436018257] [2020-10-12 09:53:34,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:53:34,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:53:34,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:34,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:34,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:34,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:34,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:39,965 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:53:39,966 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 405 [2020-10-12 09:53:39,966 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 09:53:39,966 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5449 [2020-10-12 09:53:39,966 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:53:39,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-12 09:53:39,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 09:53:39,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-12 09:53:39,967 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:53:40,382 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:53:40,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:53:40,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:40,385 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:53:40,385 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:53:40,386 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:53:40,386 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:53:40,386 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:53:40,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:53:40,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:53:40,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:53:40,387 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:53:40,444 INFO L134 CoverageAnalysis]: Checked inductivity of 4232 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 3703 trivial. 0 not checked. [2020-10-12 09:53:40,444 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1436018257] [2020-10-12 09:53:40,444 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:53:40,444 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-12 09:53:40,445 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235194482] [2020-10-12 09:53:40,445 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-12 09:53:40,445 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:53:40,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-12 09:53:40,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-12 09:53:40,446 INFO L87 Difference]: Start difference. First operand 403 states and 412 transitions. Second operand 27 states. [2020-10-12 09:53:41,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:53:41,391 INFO L93 Difference]: Finished difference Result 774 states and 798 transitions. [2020-10-12 09:53:41,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-12 09:53:41,392 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 397 [2020-10-12 09:53:41,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:53:41,394 INFO L225 Difference]: With dead ends: 774 [2020-10-12 09:53:41,394 INFO L226 Difference]: Without dead ends: 427 [2020-10-12 09:53:41,396 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-12 09:53:41,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 427 states. [2020-10-12 09:53:41,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 427 to 419. [2020-10-12 09:53:41,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 419 states. [2020-10-12 09:53:41,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 419 states to 419 states and 428 transitions. [2020-10-12 09:53:41,407 INFO L78 Accepts]: Start accepts. Automaton has 419 states and 428 transitions. Word has length 397 [2020-10-12 09:53:41,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:53:41,407 INFO L479 AbstractCegarLoop]: Abstraction has 419 states and 428 transitions. [2020-10-12 09:53:41,407 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-12 09:53:41,407 INFO L276 IsEmpty]: Start isEmpty. Operand 419 states and 428 transitions. [2020-10-12 09:53:41,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 414 [2020-10-12 09:53:41,410 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:53:41,410 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:53:41,411 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-12 09:53:41,411 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:53:41,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:53:41,411 INFO L82 PathProgramCache]: Analyzing trace with hash -1543151982, now seen corresponding path program 24 times [2020-10-12 09:53:41,411 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:53:41,412 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [271002523] [2020-10-12 09:53:41,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:53:41,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:53:41,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:41,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:41,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:41,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:41,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:46,616 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:53:46,616 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 421 [2020-10-12 09:53:46,617 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 09:53:46,617 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5186 [2020-10-12 09:53:46,617 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:53:46,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-12 09:53:46,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 63 [2020-10-12 09:53:46,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-12 09:53:46,617 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:53:47,090 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:53:47,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:53:47,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:47,092 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:53:47,092 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:53:47,093 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:53:47,093 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:53:47,093 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:53:47,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:53:47,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:53:47,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:53:47,093 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:53:47,153 INFO L134 CoverageAnalysis]: Checked inductivity of 4608 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 4032 trivial. 0 not checked. [2020-10-12 09:53:47,154 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [271002523] [2020-10-12 09:53:47,154 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:53:47,154 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-12 09:53:47,154 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135096738] [2020-10-12 09:53:47,154 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-12 09:53:47,155 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:53:47,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-12 09:53:47,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-12 09:53:47,155 INFO L87 Difference]: Start difference. First operand 419 states and 428 transitions. Second operand 28 states. [2020-10-12 09:53:48,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:53:48,248 INFO L93 Difference]: Finished difference Result 804 states and 828 transitions. [2020-10-12 09:53:48,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-12 09:53:48,249 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 413 [2020-10-12 09:53:48,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:53:48,251 INFO L225 Difference]: With dead ends: 804 [2020-10-12 09:53:48,251 INFO L226 Difference]: Without dead ends: 443 [2020-10-12 09:53:48,253 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-12 09:53:48,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 443 states. [2020-10-12 09:53:48,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 443 to 435. [2020-10-12 09:53:48,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 435 states. [2020-10-12 09:53:48,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 435 states to 435 states and 444 transitions. [2020-10-12 09:53:48,264 INFO L78 Accepts]: Start accepts. Automaton has 435 states and 444 transitions. Word has length 413 [2020-10-12 09:53:48,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:53:48,264 INFO L479 AbstractCegarLoop]: Abstraction has 435 states and 444 transitions. [2020-10-12 09:53:48,264 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-12 09:53:48,264 INFO L276 IsEmpty]: Start isEmpty. Operand 435 states and 444 transitions. [2020-10-12 09:53:48,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 430 [2020-10-12 09:53:48,267 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:53:48,267 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:53:48,267 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-12 09:53:48,268 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:53:48,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:53:48,268 INFO L82 PathProgramCache]: Analyzing trace with hash -651989886, now seen corresponding path program 25 times [2020-10-12 09:53:48,268 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:53:48,268 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [331382124] [2020-10-12 09:53:48,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:53:48,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:53:48,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:48,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:48,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:48,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:48,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:58,292 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:53:58,293 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 437 [2020-10-12 09:53:58,293 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 09:53:58,293 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10003 [2020-10-12 09:53:58,293 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:53:58,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-12 09:53:58,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 09:53:58,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-12 09:53:58,293 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:53:58,831 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:53:58,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:53:58,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:58,833 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:53:58,834 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:53:58,834 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:53:58,834 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:53:58,834 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:53:58,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:53:58,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:53:58,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:53:58,835 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:53:58,943 INFO L134 CoverageAnalysis]: Checked inductivity of 5000 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 4375 trivial. 0 not checked. [2020-10-12 09:53:58,943 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [331382124] [2020-10-12 09:53:58,944 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:53:58,944 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-12 09:53:58,944 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885402678] [2020-10-12 09:53:58,946 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-12 09:53:58,946 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:53:58,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-12 09:53:58,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-12 09:53:58,947 INFO L87 Difference]: Start difference. First operand 435 states and 444 transitions. Second operand 29 states. [2020-10-12 09:54:00,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:54:00,086 INFO L93 Difference]: Finished difference Result 834 states and 858 transitions. [2020-10-12 09:54:00,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-12 09:54:00,087 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 429 [2020-10-12 09:54:00,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:54:00,089 INFO L225 Difference]: With dead ends: 834 [2020-10-12 09:54:00,089 INFO L226 Difference]: Without dead ends: 459 [2020-10-12 09:54:00,090 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-12 09:54:00,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 459 states. [2020-10-12 09:54:00,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 459 to 451. [2020-10-12 09:54:00,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 451 states. [2020-10-12 09:54:00,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 451 states to 451 states and 460 transitions. [2020-10-12 09:54:00,101 INFO L78 Accepts]: Start accepts. Automaton has 451 states and 460 transitions. Word has length 429 [2020-10-12 09:54:00,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:54:00,101 INFO L479 AbstractCegarLoop]: Abstraction has 451 states and 460 transitions. [2020-10-12 09:54:00,101 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-12 09:54:00,101 INFO L276 IsEmpty]: Start isEmpty. Operand 451 states and 460 transitions. [2020-10-12 09:54:00,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 446 [2020-10-12 09:54:00,104 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:54:00,104 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:54:00,105 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-12 09:54:00,105 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:54:00,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:54:00,105 INFO L82 PathProgramCache]: Analyzing trace with hash 1317427826, now seen corresponding path program 26 times [2020-10-12 09:54:00,105 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:54:00,106 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [622163540] [2020-10-12 09:54:00,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:54:00,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:54:00,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:00,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:00,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:00,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:00,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:05,553 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:54:05,553 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 453 [2020-10-12 09:54:05,553 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 09:54:05,553 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5427 [2020-10-12 09:54:05,553 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:54:05,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-12 09:54:05,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 67 [2020-10-12 09:54:05,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-12 09:54:05,554 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:54:06,065 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:54:06,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:54:06,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:06,068 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:54:06,068 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:54:06,069 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:54:06,069 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:54:06,069 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:54:06,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:54:06,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:54:06,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:54:06,069 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:54:06,139 INFO L134 CoverageAnalysis]: Checked inductivity of 5408 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 4732 trivial. 0 not checked. [2020-10-12 09:54:06,140 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [622163540] [2020-10-12 09:54:06,140 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:54:06,140 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-12 09:54:06,140 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870770523] [2020-10-12 09:54:06,140 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-12 09:54:06,141 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:54:06,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-12 09:54:06,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-12 09:54:06,141 INFO L87 Difference]: Start difference. First operand 451 states and 460 transitions. Second operand 30 states. [2020-10-12 09:54:07,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:54:07,320 INFO L93 Difference]: Finished difference Result 864 states and 888 transitions. [2020-10-12 09:54:07,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-12 09:54:07,321 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 445 [2020-10-12 09:54:07,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:54:07,323 INFO L225 Difference]: With dead ends: 864 [2020-10-12 09:54:07,324 INFO L226 Difference]: Without dead ends: 475 [2020-10-12 09:54:07,325 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-12 09:54:07,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2020-10-12 09:54:07,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 467. [2020-10-12 09:54:07,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 467 states. [2020-10-12 09:54:07,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 467 states to 467 states and 476 transitions. [2020-10-12 09:54:07,335 INFO L78 Accepts]: Start accepts. Automaton has 467 states and 476 transitions. Word has length 445 [2020-10-12 09:54:07,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:54:07,335 INFO L479 AbstractCegarLoop]: Abstraction has 467 states and 476 transitions. [2020-10-12 09:54:07,335 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-12 09:54:07,335 INFO L276 IsEmpty]: Start isEmpty. Operand 467 states and 476 transitions. [2020-10-12 09:54:07,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 462 [2020-10-12 09:54:07,338 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:54:07,339 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:54:07,339 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-12 09:54:07,339 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:54:07,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:54:07,339 INFO L82 PathProgramCache]: Analyzing trace with hash 1571694690, now seen corresponding path program 27 times [2020-10-12 09:54:07,339 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:54:07,340 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1064994059] [2020-10-12 09:54:07,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:54:07,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:54:07,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:07,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:07,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:07,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:07,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:14,072 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:54:14,072 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 469 [2020-10-12 09:54:14,072 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 09:54:14,072 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6712 [2020-10-12 09:54:14,073 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:54:14,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-12 09:54:14,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 09:54:14,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-12 09:54:14,073 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:54:14,622 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:54:14,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:54:14,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:14,625 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:54:14,625 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:54:14,626 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:54:14,626 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:54:14,626 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:54:14,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:54:14,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:54:14,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:54:14,626 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:54:14,716 INFO L134 CoverageAnalysis]: Checked inductivity of 5832 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 5103 trivial. 0 not checked. [2020-10-12 09:54:14,717 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1064994059] [2020-10-12 09:54:14,717 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:54:14,717 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-12 09:54:14,717 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803110207] [2020-10-12 09:54:14,718 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-12 09:54:14,718 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:54:14,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-12 09:54:14,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-12 09:54:14,719 INFO L87 Difference]: Start difference. First operand 467 states and 476 transitions. Second operand 31 states. [2020-10-12 09:54:16,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:54:16,004 INFO L93 Difference]: Finished difference Result 894 states and 918 transitions. [2020-10-12 09:54:16,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-12 09:54:16,004 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 461 [2020-10-12 09:54:16,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:54:16,007 INFO L225 Difference]: With dead ends: 894 [2020-10-12 09:54:16,008 INFO L226 Difference]: Without dead ends: 491 [2020-10-12 09:54:16,009 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-12 09:54:16,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 491 states. [2020-10-12 09:54:16,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 491 to 483. [2020-10-12 09:54:16,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 483 states. [2020-10-12 09:54:16,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 483 states to 483 states and 492 transitions. [2020-10-12 09:54:16,019 INFO L78 Accepts]: Start accepts. Automaton has 483 states and 492 transitions. Word has length 461 [2020-10-12 09:54:16,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:54:16,019 INFO L479 AbstractCegarLoop]: Abstraction has 483 states and 492 transitions. [2020-10-12 09:54:16,019 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-12 09:54:16,019 INFO L276 IsEmpty]: Start isEmpty. Operand 483 states and 492 transitions. [2020-10-12 09:54:16,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 478 [2020-10-12 09:54:16,023 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:54:16,023 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:54:16,023 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-12 09:54:16,023 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:54:16,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:54:16,024 INFO L82 PathProgramCache]: Analyzing trace with hash 1679480402, now seen corresponding path program 28 times [2020-10-12 09:54:16,024 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:54:16,024 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1638758932] [2020-10-12 09:54:16,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:54:16,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:54:16,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:16,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:16,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:16,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:16,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:22,343 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:54:22,343 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 485 [2020-10-12 09:54:22,344 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 09:54:22,344 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6298 [2020-10-12 09:54:22,344 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:54:22,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-12 09:54:22,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 09:54:22,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-12 09:54:22,344 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:54:22,931 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:54:22,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:54:22,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:22,934 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:54:22,934 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:54:22,934 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:54:22,934 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:54:22,934 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:54:22,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:54:22,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:54:22,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:54:22,935 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:54:23,013 INFO L134 CoverageAnalysis]: Checked inductivity of 6272 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 5488 trivial. 0 not checked. [2020-10-12 09:54:23,013 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1638758932] [2020-10-12 09:54:23,014 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:54:23,014 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-12 09:54:23,014 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162159409] [2020-10-12 09:54:23,014 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-12 09:54:23,015 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:54:23,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-12 09:54:23,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-12 09:54:23,016 INFO L87 Difference]: Start difference. First operand 483 states and 492 transitions. Second operand 32 states. [2020-10-12 09:54:24,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:54:24,341 INFO L93 Difference]: Finished difference Result 924 states and 948 transitions. [2020-10-12 09:54:24,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-12 09:54:24,341 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 477 [2020-10-12 09:54:24,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:54:24,344 INFO L225 Difference]: With dead ends: 924 [2020-10-12 09:54:24,344 INFO L226 Difference]: Without dead ends: 507 [2020-10-12 09:54:24,346 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-12 09:54:24,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 507 states. [2020-10-12 09:54:24,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 507 to 499. [2020-10-12 09:54:24,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 499 states. [2020-10-12 09:54:24,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 499 states to 499 states and 508 transitions. [2020-10-12 09:54:24,356 INFO L78 Accepts]: Start accepts. Automaton has 499 states and 508 transitions. Word has length 477 [2020-10-12 09:54:24,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:54:24,357 INFO L479 AbstractCegarLoop]: Abstraction has 499 states and 508 transitions. [2020-10-12 09:54:24,357 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-12 09:54:24,357 INFO L276 IsEmpty]: Start isEmpty. Operand 499 states and 508 transitions. [2020-10-12 09:54:24,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 494 [2020-10-12 09:54:24,360 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:54:24,361 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:54:24,361 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-12 09:54:24,361 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:54:24,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:54:24,362 INFO L82 PathProgramCache]: Analyzing trace with hash -1018403774, now seen corresponding path program 29 times [2020-10-12 09:54:24,362 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:54:24,362 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [583736241] [2020-10-12 09:54:24,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:54:24,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:54:24,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:24,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:24,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:24,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:24,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:30,723 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:54:30,723 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 501 [2020-10-12 09:54:30,723 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 09:54:30,724 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6339 [2020-10-12 09:54:30,724 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:54:30,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-12 09:54:30,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 193 [2020-10-12 09:54:30,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-12 09:54:30,724 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:54:31,348 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:54:31,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:54:31,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:31,352 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:54:31,352 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:54:31,352 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:54:31,352 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:54:31,352 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:54:31,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:54:31,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:54:31,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:54:31,353 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:54:31,435 INFO L134 CoverageAnalysis]: Checked inductivity of 6728 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 5887 trivial. 0 not checked. [2020-10-12 09:54:31,435 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [583736241] [2020-10-12 09:54:31,436 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:54:31,436 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-12 09:54:31,436 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782197268] [2020-10-12 09:54:31,437 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-12 09:54:31,437 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:54:31,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-12 09:54:31,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-12 09:54:31,438 INFO L87 Difference]: Start difference. First operand 499 states and 508 transitions. Second operand 33 states. [2020-10-12 09:54:32,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:54:32,751 INFO L93 Difference]: Finished difference Result 954 states and 978 transitions. [2020-10-12 09:54:32,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-12 09:54:32,752 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 493 [2020-10-12 09:54:32,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:54:32,755 INFO L225 Difference]: With dead ends: 954 [2020-10-12 09:54:32,755 INFO L226 Difference]: Without dead ends: 523 [2020-10-12 09:54:32,757 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-12 09:54:32,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 523 states. [2020-10-12 09:54:32,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 523 to 515. [2020-10-12 09:54:32,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 515 states. [2020-10-12 09:54:32,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 515 states to 515 states and 524 transitions. [2020-10-12 09:54:32,768 INFO L78 Accepts]: Start accepts. Automaton has 515 states and 524 transitions. Word has length 493 [2020-10-12 09:54:32,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:54:32,768 INFO L479 AbstractCegarLoop]: Abstraction has 515 states and 524 transitions. [2020-10-12 09:54:32,768 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-12 09:54:32,769 INFO L276 IsEmpty]: Start isEmpty. Operand 515 states and 524 transitions. [2020-10-12 09:54:32,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 510 [2020-10-12 09:54:32,772 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:54:32,772 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:54:32,773 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-12 09:54:32,773 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:54:32,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:54:32,773 INFO L82 PathProgramCache]: Analyzing trace with hash -524103118, now seen corresponding path program 30 times [2020-10-12 09:54:32,773 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:54:32,774 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [744829922] [2020-10-12 09:54:32,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:54:32,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:54:32,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:32,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:32,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:32,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:33,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:39,085 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:54:39,085 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 517 [2020-10-12 09:54:39,085 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 09:54:39,085 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6289 [2020-10-12 09:54:39,085 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:54:39,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-12 09:54:39,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 75 [2020-10-12 09:54:39,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-12 09:54:39,086 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:54:39,742 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:54:39,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:54:39,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:39,745 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:54:39,745 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:54:39,745 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:54:39,745 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:54:39,745 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:54:39,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:54:39,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:54:39,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:54:39,746 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:54:39,836 INFO L134 CoverageAnalysis]: Checked inductivity of 7200 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 6300 trivial. 0 not checked. [2020-10-12 09:54:39,836 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [744829922] [2020-10-12 09:54:39,837 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:54:39,837 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-12 09:54:39,837 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143276755] [2020-10-12 09:54:39,837 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-12 09:54:39,837 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:54:39,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-12 09:54:39,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-12 09:54:39,838 INFO L87 Difference]: Start difference. First operand 515 states and 524 transitions. Second operand 34 states. [2020-10-12 09:54:41,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:54:41,116 INFO L93 Difference]: Finished difference Result 984 states and 1008 transitions. [2020-10-12 09:54:41,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-12 09:54:41,116 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 509 [2020-10-12 09:54:41,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:54:41,119 INFO L225 Difference]: With dead ends: 984 [2020-10-12 09:54:41,119 INFO L226 Difference]: Without dead ends: 539 [2020-10-12 09:54:41,121 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-12 09:54:41,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 539 states. [2020-10-12 09:54:41,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 539 to 531. [2020-10-12 09:54:41,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 531 states. [2020-10-12 09:54:41,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 531 states to 531 states and 540 transitions. [2020-10-12 09:54:41,132 INFO L78 Accepts]: Start accepts. Automaton has 531 states and 540 transitions. Word has length 509 [2020-10-12 09:54:41,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:54:41,132 INFO L479 AbstractCegarLoop]: Abstraction has 531 states and 540 transitions. [2020-10-12 09:54:41,132 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-12 09:54:41,132 INFO L276 IsEmpty]: Start isEmpty. Operand 531 states and 540 transitions. [2020-10-12 09:54:41,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 526 [2020-10-12 09:54:41,136 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:54:41,136 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:54:41,136 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-12 09:54:41,136 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:54:41,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:54:41,137 INFO L82 PathProgramCache]: Analyzing trace with hash 637411362, now seen corresponding path program 31 times [2020-10-12 09:54:41,137 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:54:41,137 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [174575428] [2020-10-12 09:54:41,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:54:41,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:54:41,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:41,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:41,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:41,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:41,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:46,381 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:54:46,381 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 533 [2020-10-12 09:54:46,381 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 09:54:46,381 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5221 [2020-10-12 09:54:46,381 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:54:46,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-12 09:54:46,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 77 [2020-10-12 09:54:46,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-12 09:54:46,382 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:54:47,078 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:54:47,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:54:47,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:47,081 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:54:47,082 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:54:47,082 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:54:47,082 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:54:47,082 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:54:47,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:54:47,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:54:47,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:54:47,083 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:54:47,175 INFO L134 CoverageAnalysis]: Checked inductivity of 7688 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 6727 trivial. 0 not checked. [2020-10-12 09:54:47,176 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [174575428] [2020-10-12 09:54:47,176 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:54:47,176 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-12 09:54:47,176 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183923655] [2020-10-12 09:54:47,176 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-12 09:54:47,177 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:54:47,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-12 09:54:47,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-12 09:54:47,177 INFO L87 Difference]: Start difference. First operand 531 states and 540 transitions. Second operand 35 states. [2020-10-12 09:54:48,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:54:48,522 INFO L93 Difference]: Finished difference Result 1014 states and 1038 transitions. [2020-10-12 09:54:48,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-12 09:54:48,523 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 525 [2020-10-12 09:54:48,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:54:48,525 INFO L225 Difference]: With dead ends: 1014 [2020-10-12 09:54:48,526 INFO L226 Difference]: Without dead ends: 555 [2020-10-12 09:54:48,527 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-12 09:54:48,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 555 states. [2020-10-12 09:54:48,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 555 to 547. [2020-10-12 09:54:48,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 547 states. [2020-10-12 09:54:48,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 547 states to 547 states and 556 transitions. [2020-10-12 09:54:48,537 INFO L78 Accepts]: Start accepts. Automaton has 547 states and 556 transitions. Word has length 525 [2020-10-12 09:54:48,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:54:48,537 INFO L479 AbstractCegarLoop]: Abstraction has 547 states and 556 transitions. [2020-10-12 09:54:48,537 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-12 09:54:48,537 INFO L276 IsEmpty]: Start isEmpty. Operand 547 states and 556 transitions. [2020-10-12 09:54:48,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 542 [2020-10-12 09:54:48,541 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:54:48,542 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:54:48,542 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-12 09:54:48,542 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:54:48,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:54:48,542 INFO L82 PathProgramCache]: Analyzing trace with hash 8277522, now seen corresponding path program 32 times [2020-10-12 09:54:48,542 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:54:48,543 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [460118530] [2020-10-12 09:54:48,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:54:48,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:54:48,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:48,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:48,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:48,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:48,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:53,858 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:54:53,858 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 549 [2020-10-12 09:54:53,858 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 09:54:53,858 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5292 [2020-10-12 09:54:53,858 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:54:53,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-12 09:54:53,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 09:54:53,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-12 09:54:53,859 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:54:54,616 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:54:54,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:54:54,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:54,618 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:54:54,619 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:54:54,619 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:54:54,619 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:54:54,619 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:54:54,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:54:54,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:54:54,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:54:54,619 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:54:54,718 INFO L134 CoverageAnalysis]: Checked inductivity of 8192 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 7168 trivial. 0 not checked. [2020-10-12 09:54:54,718 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [460118530] [2020-10-12 09:54:54,718 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:54:54,718 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-12 09:54:54,718 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895025041] [2020-10-12 09:54:54,719 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-12 09:54:54,719 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:54:54,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-12 09:54:54,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-12 09:54:54,720 INFO L87 Difference]: Start difference. First operand 547 states and 556 transitions. Second operand 36 states. [2020-10-12 09:54:56,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:54:56,114 INFO L93 Difference]: Finished difference Result 1044 states and 1068 transitions. [2020-10-12 09:54:56,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-12 09:54:56,114 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 541 [2020-10-12 09:54:56,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:54:56,117 INFO L225 Difference]: With dead ends: 1044 [2020-10-12 09:54:56,117 INFO L226 Difference]: Without dead ends: 571 [2020-10-12 09:54:56,118 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-12 09:54:56,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2020-10-12 09:54:56,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 563. [2020-10-12 09:54:56,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 563 states. [2020-10-12 09:54:56,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 563 states to 563 states and 572 transitions. [2020-10-12 09:54:56,129 INFO L78 Accepts]: Start accepts. Automaton has 563 states and 572 transitions. Word has length 541 [2020-10-12 09:54:56,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:54:56,130 INFO L479 AbstractCegarLoop]: Abstraction has 563 states and 572 transitions. [2020-10-12 09:54:56,130 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-12 09:54:56,130 INFO L276 IsEmpty]: Start isEmpty. Operand 563 states and 572 transitions. [2020-10-12 09:54:56,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 558 [2020-10-12 09:54:56,134 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:54:56,135 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:54:56,135 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-12 09:54:56,135 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:54:56,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:54:56,135 INFO L82 PathProgramCache]: Analyzing trace with hash -507290622, now seen corresponding path program 33 times [2020-10-12 09:54:56,136 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:54:56,136 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1486913181] [2020-10-12 09:54:56,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:54:56,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:54:56,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:56,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:56,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:56,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:56,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking...