/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/loop-new/count_by_k.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-12 16:09:23,488 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-12 16:09:23,491 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-12 16:09:23,532 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-12 16:09:23,533 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-12 16:09:23,541 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-12 16:09:23,542 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-12 16:09:23,546 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-12 16:09:23,548 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-12 16:09:23,551 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-12 16:09:23,552 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-12 16:09:23,553 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-12 16:09:23,553 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-12 16:09:23,555 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-12 16:09:23,557 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-12 16:09:23,559 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-12 16:09:23,560 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-12 16:09:23,561 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-12 16:09:23,562 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-12 16:09:23,570 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-12 16:09:23,572 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-12 16:09:23,573 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-12 16:09:23,574 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-12 16:09:23,574 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-12 16:09:23,590 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-12 16:09:23,590 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-12 16:09:23,591 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-12 16:09:23,591 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-12 16:09:23,592 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-12 16:09:23,593 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-12 16:09:23,593 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-12 16:09:23,597 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-12 16:09:23,597 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-12 16:09:23,598 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-12 16:09:23,599 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-12 16:09:23,603 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-12 16:09:23,604 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-12 16:09:23,604 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-12 16:09:23,604 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-12 16:09:23,605 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-12 16:09:23,605 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-12 16:09:23,607 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 16:09:23,642 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-12 16:09:23,642 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-12 16:09:23,644 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-12 16:09:23,644 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-12 16:09:23,644 INFO L138 SettingsManager]: * Use SBE=true [2020-10-12 16:09:23,644 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-12 16:09:23,645 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-12 16:09:23,645 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-12 16:09:23,645 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-12 16:09:23,645 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-12 16:09:23,646 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-12 16:09:23,646 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-12 16:09:23,647 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-12 16:09:23,647 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-12 16:09:23,647 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-12 16:09:23,647 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-12 16:09:23,648 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-12 16:09:23,648 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-12 16:09:23,648 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-12 16:09:23,648 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-12 16:09:23,649 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-12 16:09:23,649 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-12 16:09:23,649 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-12 16:09:23,649 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-12 16:09:23,649 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-12 16:09:23,650 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-12 16:09:23,650 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-12 16:09:23,650 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-12 16:09:23,650 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-12 16:09:23,650 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 16:09:23,950 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-12 16:09:23,962 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-12 16:09:23,965 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-12 16:09:23,967 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-12 16:09:23,967 INFO L275 PluginConnector]: CDTParser initialized [2020-10-12 16:09:23,968 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-new/count_by_k.i [2020-10-12 16:09:24,029 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/fb1d2ad9f/efbc6a8c5daa4ca881850786069a558a/FLAG7c3618409 [2020-10-12 16:09:24,416 INFO L306 CDTParser]: Found 1 translation units. [2020-10-12 16:09:24,416 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-new/count_by_k.i [2020-10-12 16:09:24,423 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/fb1d2ad9f/efbc6a8c5daa4ca881850786069a558a/FLAG7c3618409 [2020-10-12 16:09:24,791 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/fb1d2ad9f/efbc6a8c5daa4ca881850786069a558a [2020-10-12 16:09:24,801 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-12 16:09:24,802 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-12 16:09:24,803 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-12 16:09:24,804 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-12 16:09:24,808 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-12 16:09:24,808 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 04:09:24" (1/1) ... [2020-10-12 16:09:24,811 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3cc704b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:09:24, skipping insertion in model container [2020-10-12 16:09:24,811 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 04:09:24" (1/1) ... [2020-10-12 16:09:24,819 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-12 16:09:24,838 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-12 16:09:24,991 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 16:09:24,995 INFO L203 MainTranslator]: Completed pre-run [2020-10-12 16:09:25,010 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 16:09:25,025 INFO L208 MainTranslator]: Completed translation [2020-10-12 16:09:25,025 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:09:25 WrapperNode [2020-10-12 16:09:25,026 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-12 16:09:25,026 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-12 16:09:25,026 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-12 16:09:25,027 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-12 16:09:25,041 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:09:25" (1/1) ... [2020-10-12 16:09:25,041 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:09:25" (1/1) ... [2020-10-12 16:09:25,135 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:09:25" (1/1) ... [2020-10-12 16:09:25,136 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:09:25" (1/1) ... [2020-10-12 16:09:25,140 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:09:25" (1/1) ... [2020-10-12 16:09:25,145 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:09:25" (1/1) ... [2020-10-12 16:09:25,145 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:09:25" (1/1) ... [2020-10-12 16:09:25,147 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-12 16:09:25,147 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-12 16:09:25,148 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-12 16:09:25,148 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-12 16:09:25,148 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:09:25" (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 16:09:25,205 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-12 16:09:25,206 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-12 16:09:25,206 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-12 16:09:25,206 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-12 16:09:25,206 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-12 16:09:25,206 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-12 16:09:25,207 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-12 16:09:25,207 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-12 16:09:25,207 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-12 16:09:25,208 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-12 16:09:25,208 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-12 16:09:25,208 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-12 16:09:25,208 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-12 16:09:25,370 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-12 16:09:25,371 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-12 16:09:25,374 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 04:09:25 BoogieIcfgContainer [2020-10-12 16:09:25,375 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-12 16:09:25,376 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-12 16:09:25,376 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-12 16:09:25,379 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-12 16:09:25,379 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.10 04:09:24" (1/3) ... [2020-10-12 16:09:25,380 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@545e963f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 04:09:25, skipping insertion in model container [2020-10-12 16:09:25,380 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:09:25" (2/3) ... [2020-10-12 16:09:25,381 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@545e963f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 04:09:25, skipping insertion in model container [2020-10-12 16:09:25,381 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 04:09:25" (3/3) ... [2020-10-12 16:09:25,382 INFO L109 eAbstractionObserver]: Analyzing ICFG count_by_k.i [2020-10-12 16:09:25,393 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-12 16:09:25,399 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-12 16:09:25,413 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-12 16:09:25,434 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-12 16:09:25,435 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-12 16:09:25,435 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-12 16:09:25,435 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-12 16:09:25,435 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-12 16:09:25,435 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-12 16:09:25,435 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-12 16:09:25,435 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-12 16:09:25,450 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-10-12 16:09:25,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-12 16:09:25,454 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:09:25,455 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:09:25,456 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:09:25,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:09:25,461 INFO L82 PathProgramCache]: Analyzing trace with hash -253584881, now seen corresponding path program 1 times [2020-10-12 16:09:25,468 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:09:25,469 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1327013900] [2020-10-12 16:09:25,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:09:25,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:09:25,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:25,675 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:09:25,675 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-12 16:09:25,676 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:09:25,676 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 118 [2020-10-12 16:09:25,678 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:09:25,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 16:09:25,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 16:09:25,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-12 16:09:25,679 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-12 16:09:25,790 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:09:25,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:09:25,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:25,795 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:09:25,796 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:09:25,796 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:09:25,796 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 16:09:25,797 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:09:25,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:09:25,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:09:25,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:09:25,798 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:09:25,803 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 16:09:25,804 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1327013900] [2020-10-12 16:09:25,806 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 16:09:25,807 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-12 16:09:25,808 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454402116] [2020-10-12 16:09:25,813 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 16:09:25,813 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:09:25,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 16:09:25,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-12 16:09:25,835 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 6 states. [2020-10-12 16:09:25,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:09:25,940 INFO L93 Difference]: Finished difference Result 41 states and 49 transitions. [2020-10-12 16:09:25,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-12 16:09:25,942 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2020-10-12 16:09:25,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:09:25,951 INFO L225 Difference]: With dead ends: 41 [2020-10-12 16:09:25,952 INFO L226 Difference]: Without dead ends: 14 [2020-10-12 16:09:25,956 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-12 16:09:25,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-10-12 16:09:25,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-10-12 16:09:25,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-10-12 16:09:25,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2020-10-12 16:09:25,994 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 11 [2020-10-12 16:09:25,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:09:25,995 INFO L479 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2020-10-12 16:09:25,995 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 16:09:25,995 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2020-10-12 16:09:25,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-12 16:09:25,996 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:09:25,996 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:09:25,997 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-12 16:09:25,997 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:09:25,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:09:25,997 INFO L82 PathProgramCache]: Analyzing trace with hash -2041540915, now seen corresponding path program 1 times [2020-10-12 16:09:25,998 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:09:25,998 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [721377470] [2020-10-12 16:09:25,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:09:26,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:09:26,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:26,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:26,204 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:09:26,204 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-12 16:09:26,205 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:09:26,205 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 182 [2020-10-12 16:09:26,206 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:09:26,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 16:09:26,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 16:09:26,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-12 16:09:26,207 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-12 16:09:26,291 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:09:26,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:09:26,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:26,294 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:09:26,295 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:09:26,295 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:09:26,295 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:09:26,296 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:09:26,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:09:26,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:09:26,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:09:26,297 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:09:26,300 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:09:26,300 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [721377470] [2020-10-12 16:09:26,301 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:09:26,301 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-12 16:09:26,301 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281291471] [2020-10-12 16:09:26,303 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 16:09:26,303 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:09:26,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 16:09:26,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-12 16:09:26,304 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 7 states. [2020-10-12 16:09:26,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:09:26,368 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2020-10-12 16:09:26,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-12 16:09:26,369 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 13 [2020-10-12 16:09:26,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:09:26,370 INFO L225 Difference]: With dead ends: 21 [2020-10-12 16:09:26,371 INFO L226 Difference]: Without dead ends: 16 [2020-10-12 16:09:26,372 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-10-12 16:09:26,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-10-12 16:09:26,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-10-12 16:09:26,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-10-12 16:09:26,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2020-10-12 16:09:26,378 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 13 [2020-10-12 16:09:26,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:09:26,378 INFO L479 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2020-10-12 16:09:26,378 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 16:09:26,378 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2020-10-12 16:09:26,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-12 16:09:26,379 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:09:26,379 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:09:26,380 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-12 16:09:26,380 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:09:26,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:09:26,381 INFO L82 PathProgramCache]: Analyzing trace with hash 2014596107, now seen corresponding path program 2 times [2020-10-12 16:09:26,381 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:09:26,381 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [435942586] [2020-10-12 16:09:26,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:09:26,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:09:26,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:26,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:26,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:26,571 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:09:26,572 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-12 16:09:26,572 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 16:09:26,572 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 180 [2020-10-12 16:09:26,572 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:09:26,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-12 16:09:26,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 16:09:26,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-12 16:09:26,573 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:09:26,658 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:09:26,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:09:26,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:26,661 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:09:26,661 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:09:26,661 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:09:26,662 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:09:26,662 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:09:26,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:09:26,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:09:26,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:09:26,663 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:09:26,665 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:09:26,666 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [435942586] [2020-10-12 16:09:26,666 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:09:26,666 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-12 16:09:26,666 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131396209] [2020-10-12 16:09:26,667 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 16:09:26,667 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:09:26,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 16:09:26,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-12 16:09:26,668 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 8 states. [2020-10-12 16:09:26,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:09:26,744 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2020-10-12 16:09:26,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-12 16:09:26,745 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 15 [2020-10-12 16:09:26,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:09:26,745 INFO L225 Difference]: With dead ends: 23 [2020-10-12 16:09:26,746 INFO L226 Difference]: Without dead ends: 18 [2020-10-12 16:09:26,746 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-10-12 16:09:26,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-10-12 16:09:26,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-10-12 16:09:26,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-10-12 16:09:26,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2020-10-12 16:09:26,751 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 15 [2020-10-12 16:09:26,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:09:26,752 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2020-10-12 16:09:26,752 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 16:09:26,752 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2020-10-12 16:09:26,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-12 16:09:26,753 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:09:26,753 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:09:26,753 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-12 16:09:26,753 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:09:26,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:09:26,754 INFO L82 PathProgramCache]: Analyzing trace with hash 131969481, now seen corresponding path program 3 times [2020-10-12 16:09:26,754 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:09:26,754 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [147129549] [2020-10-12 16:09:26,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:09:26,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:09:26,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:26,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:26,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:26,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:26,872 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:09:26,872 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-12 16:09:26,872 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 16:09:26,873 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 109 [2020-10-12 16:09:26,873 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:09:26,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 16:09:26,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 16:09:26,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-12 16:09:26,877 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-12 16:09:26,994 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:09:26,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:09:26,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:26,999 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:09:26,999 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:09:26,999 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:09:26,999 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 16:09:27,000 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:09:27,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:09:27,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:09:27,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:09:27,001 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:09:27,005 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:09:27,005 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [147129549] [2020-10-12 16:09:27,005 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:09:27,006 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-12 16:09:27,007 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126169658] [2020-10-12 16:09:27,009 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-12 16:09:27,009 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:09:27,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-12 16:09:27,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-12 16:09:27,011 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 9 states. [2020-10-12 16:09:27,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:09:27,128 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2020-10-12 16:09:27,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 16:09:27,129 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 17 [2020-10-12 16:09:27,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:09:27,130 INFO L225 Difference]: With dead ends: 25 [2020-10-12 16:09:27,130 INFO L226 Difference]: Without dead ends: 20 [2020-10-12 16:09:27,131 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2020-10-12 16:09:27,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-10-12 16:09:27,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-10-12 16:09:27,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-10-12 16:09:27,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2020-10-12 16:09:27,142 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 17 [2020-10-12 16:09:27,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:09:27,143 INFO L479 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2020-10-12 16:09:27,143 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-12 16:09:27,143 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2020-10-12 16:09:27,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-12 16:09:27,144 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:09:27,144 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:09:27,144 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-12 16:09:27,145 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:09:27,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:09:27,145 INFO L82 PathProgramCache]: Analyzing trace with hash -890986489, now seen corresponding path program 4 times [2020-10-12 16:09:27,146 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:09:27,146 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1391569762] [2020-10-12 16:09:27,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:09:27,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:09:27,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:27,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:27,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:27,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:27,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:27,430 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:09:27,430 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-12 16:09:27,430 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 16:09:27,431 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 273 [2020-10-12 16:09:27,431 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:09:27,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 16:09:27,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 16:09:27,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-12 16:09:27,432 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:09:27,543 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:09:27,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:09:27,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:27,547 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:09:27,547 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:09:27,547 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:09:27,548 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 16:09:27,548 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:09:27,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:09:27,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:09:27,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:09:27,549 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:09:27,558 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:09:27,559 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1391569762] [2020-10-12 16:09:27,559 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:09:27,559 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-12 16:09:27,559 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714853796] [2020-10-12 16:09:27,560 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-12 16:09:27,560 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:09:27,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-12 16:09:27,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-12 16:09:27,561 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 10 states. [2020-10-12 16:09:27,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:09:27,683 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2020-10-12 16:09:27,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-12 16:09:27,683 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 19 [2020-10-12 16:09:27,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:09:27,684 INFO L225 Difference]: With dead ends: 27 [2020-10-12 16:09:27,685 INFO L226 Difference]: Without dead ends: 22 [2020-10-12 16:09:27,685 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2020-10-12 16:09:27,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-10-12 16:09:27,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-10-12 16:09:27,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-10-12 16:09:27,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2020-10-12 16:09:27,690 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 19 [2020-10-12 16:09:27,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:09:27,691 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2020-10-12 16:09:27,691 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-12 16:09:27,691 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2020-10-12 16:09:27,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-12 16:09:27,692 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:09:27,692 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:09:27,692 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-12 16:09:27,692 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:09:27,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:09:27,693 INFO L82 PathProgramCache]: Analyzing trace with hash -404162875, now seen corresponding path program 5 times [2020-10-12 16:09:27,693 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:09:27,693 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [690334764] [2020-10-12 16:09:27,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:09:27,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:09:27,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:27,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:27,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:27,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:27,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:27,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:27,876 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:09:27,877 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-12 16:09:27,877 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 16:09:27,877 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 176 [2020-10-12 16:09:27,878 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:09:27,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-12 16:09:27,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 16:09:27,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-12 16:09:27,878 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:09:27,987 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:09:27,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:09:27,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:27,989 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:09:27,990 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:09:27,990 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:09:27,990 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:09:27,990 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:09:27,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:09:27,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:09:27,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:09:27,991 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:09:27,993 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:09:27,993 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [690334764] [2020-10-12 16:09:27,994 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:09:27,994 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-12 16:09:27,994 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861494312] [2020-10-12 16:09:27,995 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-12 16:09:27,995 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:09:27,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-12 16:09:27,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2020-10-12 16:09:27,996 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 11 states. [2020-10-12 16:09:28,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:09:28,158 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2020-10-12 16:09:28,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-12 16:09:28,159 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 21 [2020-10-12 16:09:28,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:09:28,160 INFO L225 Difference]: With dead ends: 29 [2020-10-12 16:09:28,160 INFO L226 Difference]: Without dead ends: 24 [2020-10-12 16:09:28,161 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-10-12 16:09:28,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-10-12 16:09:28,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-10-12 16:09:28,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-12 16:09:28,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2020-10-12 16:09:28,165 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 21 [2020-10-12 16:09:28,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:09:28,166 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2020-10-12 16:09:28,166 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-12 16:09:28,166 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2020-10-12 16:09:28,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-12 16:09:28,167 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:09:28,167 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:09:28,167 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-12 16:09:28,167 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:09:28,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:09:28,168 INFO L82 PathProgramCache]: Analyzing trace with hash -718105085, now seen corresponding path program 6 times [2020-10-12 16:09:28,168 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:09:28,168 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [660885757] [2020-10-12 16:09:28,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:09:28,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:09:28,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:28,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:28,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:28,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:28,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:28,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:28,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:28,470 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:09:28,471 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-12 16:09:28,471 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-12 16:09:28,471 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 295 [2020-10-12 16:09:28,471 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:09:28,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-12 16:09:28,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 16:09:28,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-12 16:09:28,472 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:09:28,592 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:09:28,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:09:28,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:28,594 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:09:28,595 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:09:28,595 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:09:28,595 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:09:28,595 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:09:28,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:09:28,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:09:28,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:09:28,596 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:09:28,598 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:09:28,599 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [660885757] [2020-10-12 16:09:28,599 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:09:28,599 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-12 16:09:28,599 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66786233] [2020-10-12 16:09:28,600 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-12 16:09:28,600 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:09:28,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-12 16:09:28,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2020-10-12 16:09:28,601 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 12 states. [2020-10-12 16:09:28,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:09:28,803 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2020-10-12 16:09:28,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-12 16:09:28,804 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 23 [2020-10-12 16:09:28,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:09:28,805 INFO L225 Difference]: With dead ends: 31 [2020-10-12 16:09:28,805 INFO L226 Difference]: Without dead ends: 26 [2020-10-12 16:09:28,806 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2020-10-12 16:09:28,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-10-12 16:09:28,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-10-12 16:09:28,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-12 16:09:28,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2020-10-12 16:09:28,811 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 23 [2020-10-12 16:09:28,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:09:28,811 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2020-10-12 16:09:28,811 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-12 16:09:28,811 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2020-10-12 16:09:28,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-12 16:09:28,812 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:09:28,812 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:09:28,812 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-12 16:09:28,813 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:09:28,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:09:28,813 INFO L82 PathProgramCache]: Analyzing trace with hash -1768858175, now seen corresponding path program 7 times [2020-10-12 16:09:28,813 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:09:28,813 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1345021438] [2020-10-12 16:09:28,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:09:28,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:09:28,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:28,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:28,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:28,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:28,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:28,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:28,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:29,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:29,212 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:09:29,212 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-12 16:09:29,212 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 16:09:29,213 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 391 [2020-10-12 16:09:29,213 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:09:29,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-12 16:09:29,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 16:09:29,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-12 16:09:29,214 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:09:29,351 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:09:29,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:09:29,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:29,354 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:09:29,354 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:09:29,354 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:09:29,354 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:09:29,354 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:09:29,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:09:29,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:09:29,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:09:29,355 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:09:29,357 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:09:29,357 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1345021438] [2020-10-12 16:09:29,358 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:09:29,358 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-12 16:09:29,358 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953102356] [2020-10-12 16:09:29,358 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-12 16:09:29,359 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:09:29,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-12 16:09:29,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2020-10-12 16:09:29,359 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 13 states. [2020-10-12 16:09:29,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:09:29,587 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2020-10-12 16:09:29,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-12 16:09:29,588 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 25 [2020-10-12 16:09:29,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:09:29,589 INFO L225 Difference]: With dead ends: 33 [2020-10-12 16:09:29,589 INFO L226 Difference]: Without dead ends: 28 [2020-10-12 16:09:29,590 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=98, Invalid=322, Unknown=0, NotChecked=0, Total=420 [2020-10-12 16:09:29,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-12 16:09:29,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-10-12 16:09:29,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-12 16:09:29,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2020-10-12 16:09:29,595 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 25 [2020-10-12 16:09:29,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:09:29,595 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2020-10-12 16:09:29,595 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-12 16:09:29,595 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2020-10-12 16:09:29,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-12 16:09:29,596 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:09:29,596 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:09:29,596 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-12 16:09:29,597 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:09:29,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:09:29,597 INFO L82 PathProgramCache]: Analyzing trace with hash 2069704191, now seen corresponding path program 8 times [2020-10-12 16:09:29,597 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:09:29,598 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1438608493] [2020-10-12 16:09:29,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:09:29,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:09:29,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:29,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:29,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:29,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:29,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:29,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:29,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:29,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:29,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:30,040 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:09:30,040 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-12 16:09:30,040 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-12 16:09:30,041 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 435 [2020-10-12 16:09:30,041 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:09:30,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-12 16:09:30,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 16:09:30,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-12 16:09:30,042 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:09:30,209 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:09:30,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:09:30,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:30,211 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:09:30,211 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:09:30,211 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:09:30,211 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:09:30,212 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:09:30,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:09:30,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:09:30,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:09:30,212 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:09:30,214 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:09:30,218 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1438608493] [2020-10-12 16:09:30,218 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:09:30,218 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-12 16:09:30,218 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174514701] [2020-10-12 16:09:30,219 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-12 16:09:30,221 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:09:30,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-12 16:09:30,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=156, Unknown=0, NotChecked=0, Total=182 [2020-10-12 16:09:30,222 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 14 states. [2020-10-12 16:09:30,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:09:30,533 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2020-10-12 16:09:30,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-12 16:09:30,534 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 27 [2020-10-12 16:09:30,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:09:30,535 INFO L225 Difference]: With dead ends: 35 [2020-10-12 16:09:30,536 INFO L226 Difference]: Without dead ends: 30 [2020-10-12 16:09:30,536 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=118, Invalid=388, Unknown=0, NotChecked=0, Total=506 [2020-10-12 16:09:30,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-10-12 16:09:30,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-10-12 16:09:30,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-12 16:09:30,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2020-10-12 16:09:30,546 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 27 [2020-10-12 16:09:30,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:09:30,546 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2020-10-12 16:09:30,547 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-12 16:09:30,547 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2020-10-12 16:09:30,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-12 16:09:30,549 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:09:30,549 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:09:30,549 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-12 16:09:30,549 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:09:30,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:09:30,550 INFO L82 PathProgramCache]: Analyzing trace with hash 1551230653, now seen corresponding path program 9 times [2020-10-12 16:09:30,550 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:09:30,550 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1457158420] [2020-10-12 16:09:30,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:09:30,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:09:30,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:30,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:30,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:30,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:30,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:30,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:30,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:30,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:30,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:30,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:31,141 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:09:31,142 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-12 16:09:31,142 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-12 16:09:31,142 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 580 [2020-10-12 16:09:31,143 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:09:31,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-12 16:09:31,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 16:09:31,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-12 16:09:31,144 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:09:31,329 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:09:31,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:09:31,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:31,331 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:09:31,331 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:09:31,331 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:09:31,332 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:09:31,332 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:09:31,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:09:31,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:09:31,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:09:31,333 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:09:31,335 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:09:31,336 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1457158420] [2020-10-12 16:09:31,336 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:09:31,336 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-12 16:09:31,336 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777302437] [2020-10-12 16:09:31,337 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-12 16:09:31,337 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:09:31,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-12 16:09:31,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=182, Unknown=0, NotChecked=0, Total=210 [2020-10-12 16:09:31,337 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 15 states. [2020-10-12 16:09:31,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:09:31,657 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2020-10-12 16:09:31,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-12 16:09:31,658 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 29 [2020-10-12 16:09:31,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:09:31,658 INFO L225 Difference]: With dead ends: 37 [2020-10-12 16:09:31,659 INFO L226 Difference]: Without dead ends: 32 [2020-10-12 16:09:31,659 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=140, Invalid=460, Unknown=0, NotChecked=0, Total=600 [2020-10-12 16:09:31,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-10-12 16:09:31,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2020-10-12 16:09:31,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-12 16:09:31,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2020-10-12 16:09:31,664 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 29 [2020-10-12 16:09:31,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:09:31,665 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2020-10-12 16:09:31,665 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-12 16:09:31,665 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2020-10-12 16:09:31,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-12 16:09:31,666 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:09:31,666 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:09:31,666 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-12 16:09:31,666 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:09:31,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:09:31,666 INFO L82 PathProgramCache]: Analyzing trace with hash 1514366971, now seen corresponding path program 10 times [2020-10-12 16:09:31,667 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:09:31,667 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [661640156] [2020-10-12 16:09:31,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:09:31,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:09:31,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:31,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:31,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:31,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:31,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:31,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:31,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:31,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:31,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:31,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:31,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:32,154 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:09:32,154 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-12 16:09:32,155 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-12 16:09:32,155 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 479 [2020-10-12 16:09:32,155 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:09:32,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-12 16:09:32,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 16:09:32,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-12 16:09:32,156 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:09:32,356 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:09:32,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:09:32,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:32,358 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:09:32,358 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:09:32,359 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:09:32,359 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:09:32,359 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:09:32,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:09:32,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:09:32,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:09:32,360 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:09:32,363 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:09:32,363 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [661640156] [2020-10-12 16:09:32,363 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:09:32,363 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-12 16:09:32,364 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321695060] [2020-10-12 16:09:32,364 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-12 16:09:32,364 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:09:32,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-12 16:09:32,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240 [2020-10-12 16:09:32,365 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 16 states. [2020-10-12 16:09:32,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:09:32,708 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2020-10-12 16:09:32,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-12 16:09:32,709 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 31 [2020-10-12 16:09:32,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:09:32,710 INFO L225 Difference]: With dead ends: 39 [2020-10-12 16:09:32,710 INFO L226 Difference]: Without dead ends: 34 [2020-10-12 16:09:32,711 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=164, Invalid=538, Unknown=0, NotChecked=0, Total=702 [2020-10-12 16:09:32,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-12 16:09:32,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2020-10-12 16:09:32,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-12 16:09:32,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2020-10-12 16:09:32,717 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 31 [2020-10-12 16:09:32,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:09:32,717 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2020-10-12 16:09:32,717 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-12 16:09:32,718 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2020-10-12 16:09:32,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-12 16:09:32,718 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:09:32,718 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:09:32,719 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-12 16:09:32,719 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:09:32,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:09:32,720 INFO L82 PathProgramCache]: Analyzing trace with hash 448106937, now seen corresponding path program 11 times [2020-10-12 16:09:32,720 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:09:32,720 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1658914976] [2020-10-12 16:09:32,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:09:32,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:09:32,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:32,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:32,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:32,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:32,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:32,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:32,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:32,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:32,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:32,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:32,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:33,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:33,414 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:09:33,415 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-12 16:09:33,415 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-12 16:09:33,415 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 685 [2020-10-12 16:09:33,415 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:09:33,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-12 16:09:33,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 16:09:33,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-12 16:09:33,416 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:09:33,616 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:09:33,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:09:33,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:33,618 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:09:33,618 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:09:33,618 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:09:33,618 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:09:33,619 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:09:33,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:09:33,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:09:33,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:09:33,619 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:09:33,622 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:09:33,623 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1658914976] [2020-10-12 16:09:33,623 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:09:33,623 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-12 16:09:33,624 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690476446] [2020-10-12 16:09:33,624 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-12 16:09:33,624 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:09:33,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-12 16:09:33,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=240, Unknown=0, NotChecked=0, Total=272 [2020-10-12 16:09:33,625 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand 17 states. [2020-10-12 16:09:34,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:09:34,023 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2020-10-12 16:09:34,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-12 16:09:34,024 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 33 [2020-10-12 16:09:34,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:09:34,025 INFO L225 Difference]: With dead ends: 41 [2020-10-12 16:09:34,025 INFO L226 Difference]: Without dead ends: 36 [2020-10-12 16:09:34,026 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=190, Invalid=622, Unknown=0, NotChecked=0, Total=812 [2020-10-12 16:09:34,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-12 16:09:34,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-10-12 16:09:34,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-12 16:09:34,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2020-10-12 16:09:34,032 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 33 [2020-10-12 16:09:34,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:09:34,033 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2020-10-12 16:09:34,033 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-12 16:09:34,033 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2020-10-12 16:09:34,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-12 16:09:34,034 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:09:34,034 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:09:34,034 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-12 16:09:34,035 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:09:34,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:09:34,035 INFO L82 PathProgramCache]: Analyzing trace with hash -2025569289, now seen corresponding path program 12 times [2020-10-12 16:09:34,035 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:09:34,036 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1402516295] [2020-10-12 16:09:34,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:09:34,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:09:34,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:34,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:34,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:34,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:34,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:34,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:34,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:34,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:34,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:34,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:34,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:34,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:34,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:34,775 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:09:34,775 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-12 16:09:34,775 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-12 16:09:34,775 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 728 [2020-10-12 16:09:34,776 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:09:34,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-12 16:09:34,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 16:09:34,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-12 16:09:34,776 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:09:34,998 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:09:34,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:09:35,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:35,001 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:09:35,001 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:09:35,001 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:09:35,001 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:09:35,001 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:09:35,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:09:35,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:09:35,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:09:35,002 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:09:35,005 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:09:35,005 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1402516295] [2020-10-12 16:09:35,006 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:09:35,006 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-12 16:09:35,006 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565241642] [2020-10-12 16:09:35,007 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-12 16:09:35,007 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:09:35,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-12 16:09:35,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=272, Unknown=0, NotChecked=0, Total=306 [2020-10-12 16:09:35,008 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand 18 states. [2020-10-12 16:09:35,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:09:35,436 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2020-10-12 16:09:35,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-12 16:09:35,437 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 35 [2020-10-12 16:09:35,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:09:35,438 INFO L225 Difference]: With dead ends: 43 [2020-10-12 16:09:35,438 INFO L226 Difference]: Without dead ends: 38 [2020-10-12 16:09:35,439 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=218, Invalid=712, Unknown=0, NotChecked=0, Total=930 [2020-10-12 16:09:35,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-12 16:09:35,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2020-10-12 16:09:35,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-12 16:09:35,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2020-10-12 16:09:35,444 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 35 [2020-10-12 16:09:35,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:09:35,445 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2020-10-12 16:09:35,445 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-12 16:09:35,445 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2020-10-12 16:09:35,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-12 16:09:35,446 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:09:35,446 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:09:35,446 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-12 16:09:35,446 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:09:35,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:09:35,447 INFO L82 PathProgramCache]: Analyzing trace with hash 183459509, now seen corresponding path program 13 times [2020-10-12 16:09:35,447 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:09:35,447 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [900743869] [2020-10-12 16:09:35,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:09:35,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:09:35,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:35,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:35,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:35,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:35,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:35,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:35,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:35,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:35,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:35,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:35,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:35,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:35,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:35,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:36,201 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:09:36,202 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-12 16:09:36,202 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-12 16:09:36,203 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 744 [2020-10-12 16:09:36,203 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:09:36,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-12 16:09:36,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 16:09:36,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-12 16:09:36,204 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:09:36,443 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:09:36,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:09:36,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:36,446 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:09:36,446 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:09:36,446 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:09:36,447 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:09:36,447 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:09:36,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:09:36,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:09:36,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:09:36,448 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:09:36,451 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:09:36,452 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [900743869] [2020-10-12 16:09:36,452 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:09:36,452 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-12 16:09:36,453 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721118064] [2020-10-12 16:09:36,453 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-12 16:09:36,453 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:09:36,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-12 16:09:36,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=306, Unknown=0, NotChecked=0, Total=342 [2020-10-12 16:09:36,454 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 19 states. [2020-10-12 16:09:36,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:09:36,948 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2020-10-12 16:09:36,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-12 16:09:36,949 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 37 [2020-10-12 16:09:36,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:09:36,950 INFO L225 Difference]: With dead ends: 45 [2020-10-12 16:09:36,950 INFO L226 Difference]: Without dead ends: 40 [2020-10-12 16:09:36,952 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=248, Invalid=808, Unknown=0, NotChecked=0, Total=1056 [2020-10-12 16:09:36,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-12 16:09:36,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2020-10-12 16:09:36,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-12 16:09:36,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2020-10-12 16:09:36,960 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 37 [2020-10-12 16:09:36,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:09:36,961 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2020-10-12 16:09:36,961 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-12 16:09:36,961 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2020-10-12 16:09:36,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-12 16:09:36,962 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:09:36,963 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:09:36,963 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-12 16:09:36,963 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:09:36,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:09:36,964 INFO L82 PathProgramCache]: Analyzing trace with hash 1346290163, now seen corresponding path program 14 times [2020-10-12 16:09:36,964 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:09:36,964 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [675128590] [2020-10-12 16:09:36,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:09:36,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:09:36,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:37,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:37,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:37,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:37,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:37,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:37,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:37,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:37,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:37,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:37,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:37,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:37,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:37,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:37,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:38,569 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:09:38,569 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-12 16:09:38,569 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-12 16:09:38,569 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1593 [2020-10-12 16:09:38,569 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:09:38,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-12 16:09:38,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 16:09:38,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-12 16:09:38,570 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:09:38,821 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:09:38,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:09:38,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:38,824 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:09:38,825 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:09:38,825 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:09:38,825 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:09:38,825 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:09:38,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:09:38,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:09:38,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:09:38,826 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:09:38,829 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:09:38,829 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [675128590] [2020-10-12 16:09:38,830 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:09:38,830 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-12 16:09:38,830 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79315657] [2020-10-12 16:09:38,830 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-12 16:09:38,830 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:09:38,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-12 16:09:38,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=342, Unknown=0, NotChecked=0, Total=380 [2020-10-12 16:09:38,832 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand 20 states. [2020-10-12 16:09:39,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:09:39,387 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2020-10-12 16:09:39,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-12 16:09:39,388 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 39 [2020-10-12 16:09:39,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:09:39,388 INFO L225 Difference]: With dead ends: 47 [2020-10-12 16:09:39,389 INFO L226 Difference]: Without dead ends: 42 [2020-10-12 16:09:39,390 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=280, Invalid=910, Unknown=0, NotChecked=0, Total=1190 [2020-10-12 16:09:39,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-12 16:09:39,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-10-12 16:09:39,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-12 16:09:39,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2020-10-12 16:09:39,395 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 39 [2020-10-12 16:09:39,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:09:39,395 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2020-10-12 16:09:39,395 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-12 16:09:39,395 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2020-10-12 16:09:39,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-12 16:09:39,396 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:09:39,396 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:09:39,396 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-12 16:09:39,396 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:09:39,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:09:39,397 INFO L82 PathProgramCache]: Analyzing trace with hash 2135051697, now seen corresponding path program 15 times [2020-10-12 16:09:39,397 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:09:39,397 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1713769961] [2020-10-12 16:09:39,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:09:39,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:09:39,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:39,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:39,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:39,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:39,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:39,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:39,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:39,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:39,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:39,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:39,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:39,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:39,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:39,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:39,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:40,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:40,714 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:09:40,714 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-12 16:09:40,714 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-12 16:09:40,714 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1309 [2020-10-12 16:09:40,715 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:09:40,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-12 16:09:40,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 16:09:40,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-12 16:09:40,716 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:09:41,013 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:09:41,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:09:41,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:41,016 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:09:41,017 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:09:41,017 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:09:41,017 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:09:41,017 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:09:41,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:09:41,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:09:41,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:09:41,018 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:09:41,026 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:09:41,026 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1713769961] [2020-10-12 16:09:41,028 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:09:41,029 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-12 16:09:41,029 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409626432] [2020-10-12 16:09:41,030 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-12 16:09:41,030 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:09:41,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-12 16:09:41,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=380, Unknown=0, NotChecked=0, Total=420 [2020-10-12 16:09:41,030 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand 21 states. [2020-10-12 16:09:41,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:09:41,721 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2020-10-12 16:09:41,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-12 16:09:41,722 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 41 [2020-10-12 16:09:41,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:09:41,722 INFO L225 Difference]: With dead ends: 49 [2020-10-12 16:09:41,722 INFO L226 Difference]: Without dead ends: 44 [2020-10-12 16:09:41,723 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=314, Invalid=1018, Unknown=0, NotChecked=0, Total=1332 [2020-10-12 16:09:41,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-12 16:09:41,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2020-10-12 16:09:41,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-12 16:09:41,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2020-10-12 16:09:41,729 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 41 [2020-10-12 16:09:41,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:09:41,729 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2020-10-12 16:09:41,730 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-12 16:09:41,730 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2020-10-12 16:09:41,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-12 16:09:41,730 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:09:41,730 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:09:41,731 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-12 16:09:41,731 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:09:41,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:09:41,731 INFO L82 PathProgramCache]: Analyzing trace with hash -74325521, now seen corresponding path program 16 times [2020-10-12 16:09:41,731 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:09:41,731 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [383541741] [2020-10-12 16:09:41,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:09:41,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:09:41,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:41,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:41,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:41,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:41,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:41,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:41,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:41,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:41,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:41,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:41,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:41,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:41,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:41,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:42,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:42,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:42,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:42,966 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:09:42,966 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-12 16:09:42,966 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 17 [2020-10-12 16:09:42,966 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1226 [2020-10-12 16:09:42,966 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:09:42,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-12 16:09:42,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 16:09:42,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-12 16:09:42,967 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:09:43,296 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:09:43,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:09:43,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:43,298 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:09:43,298 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:09:43,298 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:09:43,299 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:09:43,299 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:09:43,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:09:43,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:09:43,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:09:43,299 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:09:43,303 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:09:43,303 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [383541741] [2020-10-12 16:09:43,303 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:09:43,303 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-12 16:09:43,304 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692387123] [2020-10-12 16:09:43,304 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-12 16:09:43,304 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:09:43,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-12 16:09:43,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=420, Unknown=0, NotChecked=0, Total=462 [2020-10-12 16:09:43,305 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand 22 states. [2020-10-12 16:09:44,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:09:44,016 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2020-10-12 16:09:44,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-12 16:09:44,017 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 43 [2020-10-12 16:09:44,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:09:44,017 INFO L225 Difference]: With dead ends: 51 [2020-10-12 16:09:44,018 INFO L226 Difference]: Without dead ends: 46 [2020-10-12 16:09:44,019 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=350, Invalid=1132, Unknown=0, NotChecked=0, Total=1482 [2020-10-12 16:09:44,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-12 16:09:44,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2020-10-12 16:09:44,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-12 16:09:44,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 46 transitions. [2020-10-12 16:09:44,025 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 46 transitions. Word has length 43 [2020-10-12 16:09:44,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:09:44,026 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 46 transitions. [2020-10-12 16:09:44,026 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-12 16:09:44,026 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 46 transitions. [2020-10-12 16:09:44,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-12 16:09:44,026 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:09:44,027 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:09:44,027 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-12 16:09:44,027 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:09:44,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:09:44,027 INFO L82 PathProgramCache]: Analyzing trace with hash -1571987795, now seen corresponding path program 17 times [2020-10-12 16:09:44,027 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:09:44,028 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1978843998] [2020-10-12 16:09:44,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:09:44,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:09:44,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:44,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:44,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:44,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:44,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:44,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:44,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:44,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:44,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:44,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:44,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:44,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:44,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:44,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:44,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:44,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:44,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:44,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:45,422 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:09:45,423 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-12 16:09:45,423 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 18 [2020-10-12 16:09:45,423 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1386 [2020-10-12 16:09:45,424 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:09:45,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-12 16:09:45,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 16:09:45,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-12 16:09:45,425 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:09:45,754 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:09:45,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:09:45,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:45,755 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:09:45,756 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:09:45,756 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:09:45,756 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:09:45,756 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:09:45,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:09:45,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:09:45,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:09:45,757 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:09:45,761 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:09:45,762 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1978843998] [2020-10-12 16:09:45,762 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:09:45,762 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-12 16:09:45,762 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219971271] [2020-10-12 16:09:45,763 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-12 16:09:45,763 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:09:45,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-12 16:09:45,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2020-10-12 16:09:45,763 INFO L87 Difference]: Start difference. First operand 46 states and 46 transitions. Second operand 23 states. [2020-10-12 16:09:46,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:09:46,509 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2020-10-12 16:09:46,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-12 16:09:46,510 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 45 [2020-10-12 16:09:46,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:09:46,510 INFO L225 Difference]: With dead ends: 53 [2020-10-12 16:09:46,510 INFO L226 Difference]: Without dead ends: 48 [2020-10-12 16:09:46,511 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=385, Invalid=1175, Unknown=0, NotChecked=0, Total=1560 [2020-10-12 16:09:46,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-12 16:09:46,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2020-10-12 16:09:46,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-12 16:09:46,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2020-10-12 16:09:46,523 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 45 [2020-10-12 16:09:46,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:09:46,523 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2020-10-12 16:09:46,524 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-12 16:09:46,524 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2020-10-12 16:09:46,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-12 16:09:46,524 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:09:46,525 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:09:46,525 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-12 16:09:46,525 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:09:46,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:09:46,525 INFO L82 PathProgramCache]: Analyzing trace with hash -2011388949, now seen corresponding path program 18 times [2020-10-12 16:09:46,525 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:09:46,526 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [717021270] [2020-10-12 16:09:46,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:09:46,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:09:46,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:46,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:46,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:46,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:46,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:46,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:46,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:46,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:46,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:46,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:46,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:46,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:46,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:46,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:46,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:46,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:46,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:46,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:46,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:47,767 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:09:47,767 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-12 16:09:47,767 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 19 [2020-10-12 16:09:47,767 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1228 [2020-10-12 16:09:47,767 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:09:47,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-12 16:09:47,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 16:09:47,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-12 16:09:47,768 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:09:48,145 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:09:48,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:09:48,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:48,147 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:09:48,147 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:09:48,147 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:09:48,147 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:09:48,147 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:09:48,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:09:48,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:09:48,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:09:48,148 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:09:48,152 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:09:48,152 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [717021270] [2020-10-12 16:09:48,152 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:09:48,153 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-12 16:09:48,153 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940503369] [2020-10-12 16:09:48,153 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-12 16:09:48,153 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:09:48,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-12 16:09:48,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=506, Unknown=0, NotChecked=0, Total=552 [2020-10-12 16:09:48,154 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand 24 states. [2020-10-12 16:09:49,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:09:49,060 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2020-10-12 16:09:49,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-12 16:09:49,060 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 47 [2020-10-12 16:09:49,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:09:49,061 INFO L225 Difference]: With dead ends: 55 [2020-10-12 16:09:49,062 INFO L226 Difference]: Without dead ends: 50 [2020-10-12 16:09:49,063 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=428, Invalid=1378, Unknown=0, NotChecked=0, Total=1806 [2020-10-12 16:09:49,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-12 16:09:49,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2020-10-12 16:09:49,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-12 16:09:49,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 50 transitions. [2020-10-12 16:09:49,069 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 50 transitions. Word has length 47 [2020-10-12 16:09:49,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:09:49,069 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 50 transitions. [2020-10-12 16:09:49,069 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-12 16:09:49,070 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 50 transitions. [2020-10-12 16:09:49,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-12 16:09:49,070 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:09:49,070 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:09:49,071 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-12 16:09:49,071 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:09:49,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:09:49,071 INFO L82 PathProgramCache]: Analyzing trace with hash 925864361, now seen corresponding path program 19 times [2020-10-12 16:09:49,071 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:09:49,071 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [506632972] [2020-10-12 16:09:49,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:09:49,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:09:49,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:49,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:49,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:49,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:49,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:49,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:49,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:49,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:49,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:49,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:49,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:49,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:49,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:49,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:49,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:49,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:49,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:49,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:49,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:50,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:51,288 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:09:51,288 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-12 16:09:51,288 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 20 [2020-10-12 16:09:51,288 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2209 [2020-10-12 16:09:51,288 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:09:51,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-12 16:09:51,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 16:09:51,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-12 16:09:51,289 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:09:51,680 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:09:51,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:09:51,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:51,682 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:09:51,682 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:09:51,682 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:09:51,683 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:09:51,683 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:09:51,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:09:51,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:09:51,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:09:51,683 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:09:51,687 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:09:51,688 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [506632972] [2020-10-12 16:09:51,688 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:09:51,688 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-12 16:09:51,688 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442416419] [2020-10-12 16:09:51,689 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-12 16:09:51,689 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:09:51,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-12 16:09:51,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=552, Unknown=0, NotChecked=0, Total=600 [2020-10-12 16:09:51,690 INFO L87 Difference]: Start difference. First operand 50 states and 50 transitions. Second operand 25 states. [2020-10-12 16:09:52,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:09:52,711 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2020-10-12 16:09:52,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-12 16:09:52,712 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 49 [2020-10-12 16:09:52,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:09:52,712 INFO L225 Difference]: With dead ends: 57 [2020-10-12 16:09:52,713 INFO L226 Difference]: Without dead ends: 52 [2020-10-12 16:09:52,714 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=470, Invalid=1510, Unknown=0, NotChecked=0, Total=1980 [2020-10-12 16:09:52,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-12 16:09:52,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2020-10-12 16:09:52,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-12 16:09:52,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 52 transitions. [2020-10-12 16:09:52,720 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 52 transitions. Word has length 49 [2020-10-12 16:09:52,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:09:52,720 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 52 transitions. [2020-10-12 16:09:52,720 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-12 16:09:52,720 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 52 transitions. [2020-10-12 16:09:52,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-12 16:09:52,721 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:09:52,721 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:09:52,721 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-12 16:09:52,721 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:09:52,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:09:52,722 INFO L82 PathProgramCache]: Analyzing trace with hash 1832781799, now seen corresponding path program 20 times [2020-10-12 16:09:52,722 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:09:52,722 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1488646996] [2020-10-12 16:09:52,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:09:52,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:09:52,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:52,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:52,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:52,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:52,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:52,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:52,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:53,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:53,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:53,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:53,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:53,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:53,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:53,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:53,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:53,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:53,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:53,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:53,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:53,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:53,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:55,239 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:09:55,239 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-12 16:09:55,239 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 21 [2020-10-12 16:09:55,239 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2492 [2020-10-12 16:09:55,239 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:09:55,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-12 16:09:55,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 16:09:55,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-12 16:09:55,240 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:09:55,684 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:09:55,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:09:55,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:55,686 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:09:55,686 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:09:55,686 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:09:55,687 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:09:55,687 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:09:55,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:09:55,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:09:55,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:09:55,687 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:09:55,691 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:09:55,691 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1488646996] [2020-10-12 16:09:55,692 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:09:55,692 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-12 16:09:55,692 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52547448] [2020-10-12 16:09:55,693 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-12 16:09:55,693 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:09:55,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-12 16:09:55,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=600, Unknown=0, NotChecked=0, Total=650 [2020-10-12 16:09:55,694 INFO L87 Difference]: Start difference. First operand 52 states and 52 transitions. Second operand 26 states. [2020-10-12 16:09:56,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:09:56,755 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2020-10-12 16:09:56,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-12 16:09:56,756 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 51 [2020-10-12 16:09:56,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:09:56,757 INFO L225 Difference]: With dead ends: 59 [2020-10-12 16:09:56,757 INFO L226 Difference]: Without dead ends: 54 [2020-10-12 16:09:56,758 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=514, Invalid=1648, Unknown=0, NotChecked=0, Total=2162 [2020-10-12 16:09:56,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-12 16:09:56,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2020-10-12 16:09:56,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-12 16:09:56,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 54 transitions. [2020-10-12 16:09:56,764 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 54 transitions. Word has length 51 [2020-10-12 16:09:56,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:09:56,764 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 54 transitions. [2020-10-12 16:09:56,765 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-12 16:09:56,765 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 54 transitions. [2020-10-12 16:09:56,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-12 16:09:56,765 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:09:56,765 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:09:56,765 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-12 16:09:56,766 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:09:56,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:09:56,766 INFO L82 PathProgramCache]: Analyzing trace with hash 1502078629, now seen corresponding path program 21 times [2020-10-12 16:09:56,766 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:09:56,766 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1703102997] [2020-10-12 16:09:56,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:09:56,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:09:56,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:56,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:56,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:56,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:56,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:56,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:57,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:57,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:57,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:57,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:57,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:57,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:57,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:57,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:57,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:57,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:57,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:57,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:57,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:57,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:57,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:57,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:59,629 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:09:59,629 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-12 16:09:59,629 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 22 [2020-10-12 16:09:59,630 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2854 [2020-10-12 16:09:59,630 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:09:59,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-12 16:09:59,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 16:09:59,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-12 16:09:59,631 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:10:00,172 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:10:00,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:10:00,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:00,174 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:10:00,174 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:10:00,174 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:10:00,175 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:10:00,175 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:10:00,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:10:00,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:10:00,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:10:00,175 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:10:00,181 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:10:00,181 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1703102997] [2020-10-12 16:10:00,181 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:10:00,181 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-12 16:10:00,182 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164171921] [2020-10-12 16:10:00,182 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-12 16:10:00,182 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:10:00,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-12 16:10:00,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=650, Unknown=0, NotChecked=0, Total=702 [2020-10-12 16:10:00,183 INFO L87 Difference]: Start difference. First operand 54 states and 54 transitions. Second operand 27 states. [2020-10-12 16:10:01,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:10:01,365 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2020-10-12 16:10:01,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-12 16:10:01,367 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 53 [2020-10-12 16:10:01,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:10:01,368 INFO L225 Difference]: With dead ends: 61 [2020-10-12 16:10:01,368 INFO L226 Difference]: Without dead ends: 56 [2020-10-12 16:10:01,369 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=560, Invalid=1792, Unknown=0, NotChecked=0, Total=2352 [2020-10-12 16:10:01,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-12 16:10:01,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2020-10-12 16:10:01,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-12 16:10:01,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2020-10-12 16:10:01,376 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 53 [2020-10-12 16:10:01,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:10:01,376 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2020-10-12 16:10:01,376 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-12 16:10:01,376 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2020-10-12 16:10:01,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-12 16:10:01,377 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:10:01,377 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:10:01,377 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-12 16:10:01,378 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:10:01,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:10:01,378 INFO L82 PathProgramCache]: Analyzing trace with hash 1523912163, now seen corresponding path program 22 times [2020-10-12 16:10:01,378 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:10:01,378 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1797235517] [2020-10-12 16:10:01,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:10:01,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:10:01,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:01,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:01,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:01,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:01,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:01,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:01,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:01,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:01,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:01,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:01,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:01,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:01,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:01,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:01,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:01,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:01,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:01,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:01,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:01,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:01,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:01,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:02,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:03,181 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:10:03,181 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-12 16:10:03,181 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 23 [2020-10-12 16:10:03,181 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1787 [2020-10-12 16:10:03,181 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:10:03,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-12 16:10:03,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 16:10:03,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-12 16:10:03,182 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:10:03,675 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:10:03,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:10:03,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:03,677 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:10:03,677 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:10:03,677 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:10:03,677 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:10:03,678 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:10:03,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:10:03,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:10:03,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:10:03,678 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:10:03,683 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:10:03,683 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1797235517] [2020-10-12 16:10:03,683 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:10:03,683 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-12 16:10:03,683 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311398554] [2020-10-12 16:10:03,684 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-12 16:10:03,684 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:10:03,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-12 16:10:03,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=702, Unknown=0, NotChecked=0, Total=756 [2020-10-12 16:10:03,685 INFO L87 Difference]: Start difference. First operand 56 states and 56 transitions. Second operand 28 states. [2020-10-12 16:10:05,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:10:05,031 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions. [2020-10-12 16:10:05,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-12 16:10:05,032 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 55 [2020-10-12 16:10:05,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:10:05,033 INFO L225 Difference]: With dead ends: 63 [2020-10-12 16:10:05,033 INFO L226 Difference]: Without dead ends: 58 [2020-10-12 16:10:05,036 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=608, Invalid=1942, Unknown=0, NotChecked=0, Total=2550 [2020-10-12 16:10:05,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-12 16:10:05,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2020-10-12 16:10:05,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-12 16:10:05,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 58 transitions. [2020-10-12 16:10:05,046 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 58 transitions. Word has length 55 [2020-10-12 16:10:05,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:10:05,046 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 58 transitions. [2020-10-12 16:10:05,046 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-12 16:10:05,046 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 58 transitions. [2020-10-12 16:10:05,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-12 16:10:05,046 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:10:05,047 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:10:05,047 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-12 16:10:05,047 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:10:05,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:10:05,047 INFO L82 PathProgramCache]: Analyzing trace with hash 1031101857, now seen corresponding path program 23 times [2020-10-12 16:10:05,047 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:10:05,047 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [612070071] [2020-10-12 16:10:05,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:10:05,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:10:05,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:05,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:05,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:05,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:05,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:05,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:05,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:05,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:05,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:05,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:05,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:05,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:05,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:05,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:05,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:05,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:05,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:05,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:05,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:05,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:05,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:05,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:05,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:06,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:07,720 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:10:07,720 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-12 16:10:07,721 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 24 [2020-10-12 16:10:07,721 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2662 [2020-10-12 16:10:07,721 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:10:07,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-12 16:10:07,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 16:10:07,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-12 16:10:07,721 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:10:08,268 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:10:08,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:10:08,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:08,270 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:10:08,270 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:10:08,270 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:10:08,271 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:10:08,271 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:10:08,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:10:08,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:10:08,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:10:08,272 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:10:08,276 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:10:08,276 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [612070071] [2020-10-12 16:10:08,276 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:10:08,276 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-12 16:10:08,276 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205259781] [2020-10-12 16:10:08,277 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-12 16:10:08,277 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:10:08,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-12 16:10:08,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=756, Unknown=0, NotChecked=0, Total=812 [2020-10-12 16:10:08,278 INFO L87 Difference]: Start difference. First operand 58 states and 58 transitions. Second operand 29 states. [2020-10-12 16:10:09,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:10:09,697 INFO L93 Difference]: Finished difference Result 65 states and 65 transitions. [2020-10-12 16:10:09,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-12 16:10:09,698 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 57 [2020-10-12 16:10:09,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:10:09,698 INFO L225 Difference]: With dead ends: 65 [2020-10-12 16:10:09,699 INFO L226 Difference]: Without dead ends: 60 [2020-10-12 16:10:09,699 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=658, Invalid=2098, Unknown=0, NotChecked=0, Total=2756 [2020-10-12 16:10:09,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-12 16:10:09,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2020-10-12 16:10:09,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-12 16:10:09,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 60 transitions. [2020-10-12 16:10:09,704 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 60 transitions. Word has length 57 [2020-10-12 16:10:09,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:10:09,705 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 60 transitions. [2020-10-12 16:10:09,705 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-12 16:10:09,705 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 60 transitions. [2020-10-12 16:10:09,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-12 16:10:09,706 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:10:09,706 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:10:09,706 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-12 16:10:09,706 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:10:09,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:10:09,706 INFO L82 PathProgramCache]: Analyzing trace with hash -113199649, now seen corresponding path program 24 times [2020-10-12 16:10:09,707 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:10:09,707 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [147371713] [2020-10-12 16:10:09,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:10:09,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:10:09,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:09,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:09,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:09,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:09,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:09,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:09,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:09,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:09,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:10,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:10,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:10,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:10,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:10,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:10,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:10,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:10,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:10,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:10,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:10,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:10,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:10,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:10,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:10,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:10,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:12,554 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:10:12,554 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-12 16:10:12,554 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 25 [2020-10-12 16:10:12,554 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2836 [2020-10-12 16:10:12,554 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:10:12,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-12 16:10:12,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 16:10:12,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-12 16:10:12,555 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:10:13,317 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:10:13,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:10:13,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:13,320 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:10:13,320 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:10:13,321 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:10:13,321 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:10:13,321 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:10:13,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:10:13,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:10:13,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:10:13,322 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:10:13,335 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:10:13,335 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [147371713] [2020-10-12 16:10:13,335 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:10:13,335 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-12 16:10:13,336 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882324255] [2020-10-12 16:10:13,336 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-12 16:10:13,336 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:10:13,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-12 16:10:13,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=812, Unknown=0, NotChecked=0, Total=870 [2020-10-12 16:10:13,338 INFO L87 Difference]: Start difference. First operand 60 states and 60 transitions. Second operand 30 states. [2020-10-12 16:10:14,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:10:14,872 INFO L93 Difference]: Finished difference Result 67 states and 67 transitions. [2020-10-12 16:10:14,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-12 16:10:14,873 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 59 [2020-10-12 16:10:14,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:10:14,874 INFO L225 Difference]: With dead ends: 67 [2020-10-12 16:10:14,874 INFO L226 Difference]: Without dead ends: 62 [2020-10-12 16:10:14,875 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=710, Invalid=2260, Unknown=0, NotChecked=0, Total=2970 [2020-10-12 16:10:14,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-12 16:10:14,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2020-10-12 16:10:14,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-12 16:10:14,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 62 transitions. [2020-10-12 16:10:14,880 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 62 transitions. Word has length 59 [2020-10-12 16:10:14,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:10:14,880 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 62 transitions. [2020-10-12 16:10:14,880 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-12 16:10:14,881 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 62 transitions. [2020-10-12 16:10:14,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-12 16:10:14,881 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:10:14,881 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:10:14,881 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-12 16:10:14,881 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:10:14,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:10:14,882 INFO L82 PathProgramCache]: Analyzing trace with hash -275319139, now seen corresponding path program 25 times [2020-10-12 16:10:14,882 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:10:14,882 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [635330437] [2020-10-12 16:10:14,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:10:14,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:10:14,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:15,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:15,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:15,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:15,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:15,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:15,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:15,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:15,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:15,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:15,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:15,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:15,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:15,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:15,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:15,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:15,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:15,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:15,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:15,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:15,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:15,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:15,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:15,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:15,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:15,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:16,685 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:10:16,685 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-12 16:10:16,685 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 26 [2020-10-12 16:10:16,685 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1795 [2020-10-12 16:10:16,685 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:10:16,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-12 16:10:16,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 16:10:16,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-12 16:10:16,686 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:10:17,394 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:10:17,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:10:17,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:17,395 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:10:17,396 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:10:17,396 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:10:17,396 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:10:17,396 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:10:17,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:10:17,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:10:17,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:10:17,397 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:10:17,403 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:10:17,403 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [635330437] [2020-10-12 16:10:17,403 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:10:17,403 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-12 16:10:17,403 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883346401] [2020-10-12 16:10:17,406 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-12 16:10:17,407 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:10:17,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-12 16:10:17,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=870, Unknown=0, NotChecked=0, Total=930 [2020-10-12 16:10:17,408 INFO L87 Difference]: Start difference. First operand 62 states and 62 transitions. Second operand 31 states. [2020-10-12 16:10:19,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:10:19,098 INFO L93 Difference]: Finished difference Result 69 states and 69 transitions. [2020-10-12 16:10:19,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-12 16:10:19,098 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 61 [2020-10-12 16:10:19,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:10:19,099 INFO L225 Difference]: With dead ends: 69 [2020-10-12 16:10:19,100 INFO L226 Difference]: Without dead ends: 64 [2020-10-12 16:10:19,101 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=764, Invalid=2428, Unknown=0, NotChecked=0, Total=3192 [2020-10-12 16:10:19,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-12 16:10:19,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2020-10-12 16:10:19,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-12 16:10:19,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 64 transitions. [2020-10-12 16:10:19,107 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 64 transitions. Word has length 61 [2020-10-12 16:10:19,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:10:19,108 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 64 transitions. [2020-10-12 16:10:19,108 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-12 16:10:19,108 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 64 transitions. [2020-10-12 16:10:19,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-12 16:10:19,108 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:10:19,108 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:10:19,109 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-12 16:10:19,109 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:10:19,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:10:19,109 INFO L82 PathProgramCache]: Analyzing trace with hash -1453326373, now seen corresponding path program 26 times [2020-10-12 16:10:19,109 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:10:19,110 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [987783834] [2020-10-12 16:10:19,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:10:19,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:10:19,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:19,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:19,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:19,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:19,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:19,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:19,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:19,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:19,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:19,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:19,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:19,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:19,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:19,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:19,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:19,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:19,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:19,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:19,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:19,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:19,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:19,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:19,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:20,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:20,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:20,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:20,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:22,082 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:10:22,082 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-12 16:10:22,083 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 27 [2020-10-12 16:10:22,083 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2960 [2020-10-12 16:10:22,083 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:10:22,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-12 16:10:22,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 16:10:22,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-12 16:10:22,084 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:10:22,762 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:10:22,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:10:22,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:22,764 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:10:22,764 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:10:22,764 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:10:22,764 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:10:22,765 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:10:22,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:10:22,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:10:22,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:10:22,765 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:10:22,770 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:10:22,770 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [987783834] [2020-10-12 16:10:22,771 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:10:22,771 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-12 16:10:22,771 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074888224] [2020-10-12 16:10:22,771 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-12 16:10:22,771 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:10:22,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-12 16:10:22,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=930, Unknown=0, NotChecked=0, Total=992 [2020-10-12 16:10:22,772 INFO L87 Difference]: Start difference. First operand 64 states and 64 transitions. Second operand 32 states. [2020-10-12 16:10:24,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:10:24,633 INFO L93 Difference]: Finished difference Result 71 states and 71 transitions. [2020-10-12 16:10:24,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-12 16:10:24,635 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 63 [2020-10-12 16:10:24,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:10:24,636 INFO L225 Difference]: With dead ends: 71 [2020-10-12 16:10:24,636 INFO L226 Difference]: Without dead ends: 66 [2020-10-12 16:10:24,637 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=820, Invalid=2602, Unknown=0, NotChecked=0, Total=3422 [2020-10-12 16:10:24,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-12 16:10:24,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2020-10-12 16:10:24,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-12 16:10:24,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 66 transitions. [2020-10-12 16:10:24,642 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 66 transitions. Word has length 63 [2020-10-12 16:10:24,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:10:24,642 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 66 transitions. [2020-10-12 16:10:24,642 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-12 16:10:24,643 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 66 transitions. [2020-10-12 16:10:24,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-12 16:10:24,643 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:10:24,643 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:10:24,643 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-12 16:10:24,644 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:10:24,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:10:24,644 INFO L82 PathProgramCache]: Analyzing trace with hash 353087897, now seen corresponding path program 27 times [2020-10-12 16:10:24,644 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:10:24,644 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1904138679] [2020-10-12 16:10:24,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:10:24,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:10:24,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:24,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:24,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:24,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:24,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:24,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:24,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:24,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:24,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:24,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:24,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:24,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:24,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:24,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:24,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:24,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:24,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:25,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:25,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:25,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:25,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:25,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:25,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:25,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:25,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:25,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:25,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:25,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:27,264 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:10:27,264 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-12 16:10:27,264 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 28 [2020-10-12 16:10:27,265 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2608 [2020-10-12 16:10:27,265 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:10:27,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-12 16:10:27,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 16:10:27,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-12 16:10:27,266 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:10:27,977 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:10:27,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:10:27,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:27,979 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:10:27,979 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:10:27,979 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:10:27,979 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:10:27,980 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:10:27,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:10:27,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:10:27,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:10:27,980 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:10:27,985 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:10:27,986 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1904138679] [2020-10-12 16:10:27,986 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:10:27,986 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-12 16:10:27,986 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412754048] [2020-10-12 16:10:27,986 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-12 16:10:27,987 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:10:27,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-12 16:10:27,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=992, Unknown=0, NotChecked=0, Total=1056 [2020-10-12 16:10:27,987 INFO L87 Difference]: Start difference. First operand 66 states and 66 transitions. Second operand 33 states. [2020-10-12 16:10:29,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:10:29,968 INFO L93 Difference]: Finished difference Result 73 states and 73 transitions. [2020-10-12 16:10:29,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-12 16:10:29,968 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 65 [2020-10-12 16:10:29,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:10:29,969 INFO L225 Difference]: With dead ends: 73 [2020-10-12 16:10:29,970 INFO L226 Difference]: Without dead ends: 68 [2020-10-12 16:10:29,972 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 381 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=878, Invalid=2782, Unknown=0, NotChecked=0, Total=3660 [2020-10-12 16:10:29,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-12 16:10:29,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2020-10-12 16:10:29,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-12 16:10:29,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 68 transitions. [2020-10-12 16:10:29,978 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 68 transitions. Word has length 65 [2020-10-12 16:10:29,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:10:29,979 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 68 transitions. [2020-10-12 16:10:29,979 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-12 16:10:29,979 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 68 transitions. [2020-10-12 16:10:29,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-12 16:10:29,979 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:10:29,980 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:10:29,980 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-12 16:10:29,980 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:10:29,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:10:29,980 INFO L82 PathProgramCache]: Analyzing trace with hash 1150413783, now seen corresponding path program 28 times [2020-10-12 16:10:29,981 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:10:29,981 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1954273781] [2020-10-12 16:10:29,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:10:29,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:10:29,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:30,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:30,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:30,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:30,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:30,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:30,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:30,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:30,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:30,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:30,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:30,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:30,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:30,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:30,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:30,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:30,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:30,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:30,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:30,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:30,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:30,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:30,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:31,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:31,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:31,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:31,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:31,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:31,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:33,542 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:10:33,543 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-12 16:10:33,543 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 29 [2020-10-12 16:10:33,543 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3552 [2020-10-12 16:10:33,543 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:10:33,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-12 16:10:33,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 16:10:33,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 63 [2020-10-12 16:10:33,544 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:10:34,325 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:10:34,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:10:34,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:34,327 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:10:34,327 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:10:34,327 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:10:34,327 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:10:34,327 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:10:34,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:10:34,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:10:34,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:10:34,328 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:10:34,336 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:10:34,337 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1954273781] [2020-10-12 16:10:34,337 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:10:34,337 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-12 16:10:34,337 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58283884] [2020-10-12 16:10:34,338 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-12 16:10:34,339 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:10:34,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-12 16:10:34,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=1056, Unknown=0, NotChecked=0, Total=1122 [2020-10-12 16:10:34,339 INFO L87 Difference]: Start difference. First operand 68 states and 68 transitions. Second operand 34 states. [2020-10-12 16:10:36,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:10:36,526 INFO L93 Difference]: Finished difference Result 75 states and 75 transitions. [2020-10-12 16:10:36,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-12 16:10:36,527 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 67 [2020-10-12 16:10:36,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:10:36,528 INFO L225 Difference]: With dead ends: 75 [2020-10-12 16:10:36,528 INFO L226 Difference]: Without dead ends: 70 [2020-10-12 16:10:36,530 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 409 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=938, Invalid=2968, Unknown=0, NotChecked=0, Total=3906 [2020-10-12 16:10:36,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-12 16:10:36,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2020-10-12 16:10:36,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-12 16:10:36,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 70 transitions. [2020-10-12 16:10:36,536 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 70 transitions. Word has length 67 [2020-10-12 16:10:36,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:10:36,536 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 70 transitions. [2020-10-12 16:10:36,536 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-12 16:10:36,536 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 70 transitions. [2020-10-12 16:10:36,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-12 16:10:36,537 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:10:36,537 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:10:36,537 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-12 16:10:36,537 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:10:36,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:10:36,538 INFO L82 PathProgramCache]: Analyzing trace with hash -1418555755, now seen corresponding path program 29 times [2020-10-12 16:10:36,538 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:10:36,538 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [867548475] [2020-10-12 16:10:36,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:10:36,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:10:36,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:36,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:36,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:36,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:36,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:36,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:36,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:36,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:36,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:36,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:36,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:36,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:36,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:36,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:36,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:36,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:36,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:36,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:36,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:36,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:36,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:37,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:37,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:37,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:37,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:37,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:37,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:37,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:37,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:37,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:40,010 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:10:40,010 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-12 16:10:40,010 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 30 [2020-10-12 16:10:40,010 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3462 [2020-10-12 16:10:40,010 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:10:40,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-12 16:10:40,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 16:10:40,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-10-12 16:10:40,011 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:10:40,879 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:10:40,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:10:40,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:40,881 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:10:40,882 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:10:40,882 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:10:40,882 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:10:40,883 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:10:40,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:10:40,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:10:40,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:10:40,884 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:10:40,897 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:10:40,898 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [867548475] [2020-10-12 16:10:40,902 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:10:40,902 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-12 16:10:40,902 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278968359] [2020-10-12 16:10:40,903 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-12 16:10:40,903 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:10:40,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-12 16:10:40,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=1122, Unknown=0, NotChecked=0, Total=1190 [2020-10-12 16:10:40,904 INFO L87 Difference]: Start difference. First operand 70 states and 70 transitions. Second operand 35 states. [2020-10-12 16:10:43,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:10:43,219 INFO L93 Difference]: Finished difference Result 77 states and 77 transitions. [2020-10-12 16:10:43,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-12 16:10:43,220 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 69 [2020-10-12 16:10:43,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:10:43,221 INFO L225 Difference]: With dead ends: 77 [2020-10-12 16:10:43,221 INFO L226 Difference]: Without dead ends: 72 [2020-10-12 16:10:43,224 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 438 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1000, Invalid=3160, Unknown=0, NotChecked=0, Total=4160 [2020-10-12 16:10:43,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-12 16:10:43,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2020-10-12 16:10:43,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-12 16:10:43,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 72 transitions. [2020-10-12 16:10:43,230 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 72 transitions. Word has length 69 [2020-10-12 16:10:43,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:10:43,230 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 72 transitions. [2020-10-12 16:10:43,230 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-12 16:10:43,230 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 72 transitions. [2020-10-12 16:10:43,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-12 16:10:43,231 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:10:43,231 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:10:43,231 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-12 16:10:43,231 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:10:43,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:10:43,232 INFO L82 PathProgramCache]: Analyzing trace with hash -592086573, now seen corresponding path program 30 times [2020-10-12 16:10:43,232 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:10:43,232 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1702013941] [2020-10-12 16:10:43,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:10:43,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:10:43,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:43,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:43,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:43,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:43,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:43,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:43,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:43,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:43,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:43,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:43,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:43,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:43,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:43,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:43,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:43,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:43,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:43,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:43,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:43,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:43,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:43,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:43,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:43,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:43,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:43,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:43,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:43,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:43,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:43,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:43,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:46,793 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:10:46,794 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-12 16:10:46,794 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 31 [2020-10-12 16:10:46,794 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3550 [2020-10-12 16:10:46,794 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:10:46,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-12 16:10:46,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 16:10:46,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 67 [2020-10-12 16:10:46,794 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:10:47,694 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:10:47,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:10:47,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:47,696 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:10:47,696 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:10:47,696 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:10:47,696 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:10:47,696 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:10:47,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:10:47,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:10:47,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:10:47,697 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:10:47,704 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:10:47,705 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1702013941] [2020-10-12 16:10:47,705 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:10:47,705 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-12 16:10:47,705 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902958063] [2020-10-12 16:10:47,705 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-12 16:10:47,705 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:10:47,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-12 16:10:47,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=1190, Unknown=0, NotChecked=0, Total=1260 [2020-10-12 16:10:47,706 INFO L87 Difference]: Start difference. First operand 72 states and 72 transitions. Second operand 36 states. [2020-10-12 16:10:50,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:10:50,197 INFO L93 Difference]: Finished difference Result 79 states and 79 transitions. [2020-10-12 16:10:50,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-12 16:10:50,198 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 71 [2020-10-12 16:10:50,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:10:50,199 INFO L225 Difference]: With dead ends: 79 [2020-10-12 16:10:50,199 INFO L226 Difference]: Without dead ends: 74 [2020-10-12 16:10:50,200 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 468 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=1064, Invalid=3358, Unknown=0, NotChecked=0, Total=4422 [2020-10-12 16:10:50,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-12 16:10:50,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2020-10-12 16:10:50,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-12 16:10:50,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 74 transitions. [2020-10-12 16:10:50,206 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 74 transitions. Word has length 71 [2020-10-12 16:10:50,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:10:50,207 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 74 transitions. [2020-10-12 16:10:50,207 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-12 16:10:50,207 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 74 transitions. [2020-10-12 16:10:50,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-12 16:10:50,208 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:10:50,208 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:10:50,208 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-12 16:10:50,208 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:10:50,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:10:50,209 INFO L82 PathProgramCache]: Analyzing trace with hash -924152431, now seen corresponding path program 31 times [2020-10-12 16:10:50,209 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:10:50,209 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1238569229] [2020-10-12 16:10:50,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:10:50,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:10:50,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:50,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:50,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:50,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:50,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:50,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:50,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:50,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:50,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:50,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:50,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:50,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:50,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:50,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:50,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:50,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:50,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:50,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:50,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:50,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:50,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:50,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:50,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:50,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:50,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:50,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:50,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:50,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:50,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:50,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:51,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:51,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:54,218 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:10:54,218 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-12 16:10:54,218 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 32 [2020-10-12 16:10:54,219 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3996 [2020-10-12 16:10:54,219 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:10:54,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-12 16:10:54,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 16:10:54,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 69 [2020-10-12 16:10:54,219 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:10:55,158 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:10:55,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:10:55,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:55,161 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:10:55,161 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:10:55,161 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:10:55,162 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:10:55,162 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:10:55,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:10:55,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:10:55,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:10:55,162 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:10:55,169 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:10:55,169 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1238569229] [2020-10-12 16:10:55,169 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:10:55,169 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-12 16:10:55,170 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132310230] [2020-10-12 16:10:55,170 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-12 16:10:55,170 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:10:55,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-12 16:10:55,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=1260, Unknown=0, NotChecked=0, Total=1332 [2020-10-12 16:10:55,171 INFO L87 Difference]: Start difference. First operand 74 states and 74 transitions. Second operand 37 states. [2020-10-12 16:10:57,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:10:57,867 INFO L93 Difference]: Finished difference Result 81 states and 81 transitions. [2020-10-12 16:10:57,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-12 16:10:57,868 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 73 [2020-10-12 16:10:57,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:10:57,870 INFO L225 Difference]: With dead ends: 81 [2020-10-12 16:10:57,870 INFO L226 Difference]: Without dead ends: 76 [2020-10-12 16:10:57,871 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 499 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=1130, Invalid=3562, Unknown=0, NotChecked=0, Total=4692 [2020-10-12 16:10:57,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-12 16:10:57,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2020-10-12 16:10:57,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-12 16:10:57,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 76 transitions. [2020-10-12 16:10:57,879 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 76 transitions. Word has length 73 [2020-10-12 16:10:57,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:10:57,879 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 76 transitions. [2020-10-12 16:10:57,879 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-12 16:10:57,880 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 76 transitions. [2020-10-12 16:10:57,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-12 16:10:57,880 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:10:57,880 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:10:57,881 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-12 16:10:57,881 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:10:57,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:10:57,881 INFO L82 PathProgramCache]: Analyzing trace with hash 2083105231, now seen corresponding path program 32 times [2020-10-12 16:10:57,881 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:10:57,881 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1410661502] [2020-10-12 16:10:57,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:10:57,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:10:57,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:58,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:58,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:58,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:58,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:58,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:58,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:58,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:58,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:58,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:58,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:58,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:58,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:58,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:58,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:58,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:58,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:58,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:58,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:58,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:58,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:58,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:58,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:58,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:58,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:58,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:58,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:58,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:58,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:58,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:59,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:59,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:59,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:02,896 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:11:02,896 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-12 16:11:02,896 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 33 [2020-10-12 16:11:02,896 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-12 16:11:02,897 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:11:02,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-12 16:11:02,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 16:11:02,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-12 16:11:02,897 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:11:03,917 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:11:03,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:11:03,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:03,919 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:11:03,920 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:11:03,920 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:11:03,920 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:11:03,920 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:11:03,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:11:03,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:11:03,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:11:03,921 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:11:03,928 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:11:03,928 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1410661502] [2020-10-12 16:11:03,928 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:11:03,928 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-12 16:11:03,928 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281580701] [2020-10-12 16:11:03,929 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-12 16:11:03,929 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:11:03,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-12 16:11:03,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=1332, Unknown=0, NotChecked=0, Total=1406 [2020-10-12 16:11:03,929 INFO L87 Difference]: Start difference. First operand 76 states and 76 transitions. Second operand 38 states. [2020-10-12 16:11:06,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:11:06,846 INFO L93 Difference]: Finished difference Result 83 states and 83 transitions. [2020-10-12 16:11:06,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-12 16:11:06,847 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 75 [2020-10-12 16:11:06,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:11:06,848 INFO L225 Difference]: With dead ends: 83 [2020-10-12 16:11:06,848 INFO L226 Difference]: Without dead ends: 78 [2020-10-12 16:11:06,850 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 531 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=1198, Invalid=3772, Unknown=0, NotChecked=0, Total=4970 [2020-10-12 16:11:06,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-12 16:11:06,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2020-10-12 16:11:06,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-12 16:11:06,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 78 transitions. [2020-10-12 16:11:06,861 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 78 transitions. Word has length 75 [2020-10-12 16:11:06,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:11:06,861 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 78 transitions. [2020-10-12 16:11:06,861 INFO L480 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-12 16:11:06,861 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 78 transitions. [2020-10-12 16:11:06,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-12 16:11:06,862 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:11:06,862 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:11:06,862 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-12 16:11:06,863 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:11:06,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:11:06,864 INFO L82 PathProgramCache]: Analyzing trace with hash 1544728205, now seen corresponding path program 33 times [2020-10-12 16:11:06,864 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:11:06,864 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1708942675] [2020-10-12 16:11:06,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:11:06,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:11:06,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:07,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:07,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:07,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:07,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:07,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:07,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:07,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:07,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:07,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:07,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:07,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:07,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:07,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:07,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:07,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:07,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:07,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:07,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:07,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:07,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:07,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:07,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:07,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:07,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:07,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:07,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:07,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:07,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:07,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:07,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:07,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:07,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:07,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:11,811 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:11:11,811 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-12 16:11:11,812 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 34 [2020-10-12 16:11:11,812 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4930 [2020-10-12 16:11:11,812 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:11:11,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-12 16:11:11,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 16:11:11,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 73 [2020-10-12 16:11:11,812 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:11:12,925 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:11:12,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:11:12,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:12,926 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:11:12,927 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:11:12,927 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:11:12,927 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:11:12,927 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:11:12,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:11:12,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:11:12,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:11:12,928 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:11:12,936 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:11:12,936 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1708942675] [2020-10-12 16:11:12,936 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:11:12,936 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-12 16:11:12,937 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059181407] [2020-10-12 16:11:12,937 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-12 16:11:12,937 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:11:12,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-12 16:11:12,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=1406, Unknown=0, NotChecked=0, Total=1482 [2020-10-12 16:11:12,938 INFO L87 Difference]: Start difference. First operand 78 states and 78 transitions. Second operand 39 states. [2020-10-12 16:11:16,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:11:16,063 INFO L93 Difference]: Finished difference Result 85 states and 85 transitions. [2020-10-12 16:11:16,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-12 16:11:16,064 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 77 [2020-10-12 16:11:16,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:11:16,065 INFO L225 Difference]: With dead ends: 85 [2020-10-12 16:11:16,065 INFO L226 Difference]: Without dead ends: 80 [2020-10-12 16:11:16,066 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 564 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=1268, Invalid=3988, Unknown=0, NotChecked=0, Total=5256 [2020-10-12 16:11:16,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-12 16:11:16,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2020-10-12 16:11:16,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-12 16:11:16,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 80 transitions. [2020-10-12 16:11:16,073 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 80 transitions. Word has length 77 [2020-10-12 16:11:16,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:11:16,073 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 80 transitions. [2020-10-12 16:11:16,073 INFO L480 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-12 16:11:16,073 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 80 transitions. [2020-10-12 16:11:16,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-12 16:11:16,074 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:11:16,074 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:11:16,074 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-12 16:11:16,074 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:11:16,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:11:16,075 INFO L82 PathProgramCache]: Analyzing trace with hash -439518261, now seen corresponding path program 34 times [2020-10-12 16:11:16,075 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:11:16,075 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [424680572] [2020-10-12 16:11:16,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:11:16,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:11:16,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:16,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:16,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:16,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:16,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:16,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:16,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:16,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:16,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:16,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:16,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:16,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:16,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:16,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:16,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:16,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:16,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:16,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:16,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:16,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:16,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:16,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:16,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:16,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:16,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:16,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:16,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:16,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:16,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:17,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:17,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:17,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:17,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:17,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:17,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:21,090 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:11:21,091 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-12 16:11:21,091 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 35 [2020-10-12 16:11:21,091 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-12 16:11:21,091 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:11:21,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-12 16:11:21,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 16:11:21,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-10-12 16:11:21,091 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:11:22,287 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:11:22,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:11:22,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:22,289 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:11:22,289 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:11:22,289 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:11:22,289 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:11:22,289 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:11:22,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:11:22,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:11:22,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:11:22,290 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:11:22,298 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:11:22,298 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [424680572] [2020-10-12 16:11:22,299 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:11:22,299 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-12 16:11:22,299 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975997234] [2020-10-12 16:11:22,300 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-12 16:11:22,300 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:11:22,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-12 16:11:22,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=1482, Unknown=0, NotChecked=0, Total=1560 [2020-10-12 16:11:22,302 INFO L87 Difference]: Start difference. First operand 80 states and 80 transitions. Second operand 40 states. [2020-10-12 16:11:25,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:11:25,651 INFO L93 Difference]: Finished difference Result 87 states and 87 transitions. [2020-10-12 16:11:25,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-12 16:11:25,652 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 79 [2020-10-12 16:11:25,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:11:25,653 INFO L225 Difference]: With dead ends: 87 [2020-10-12 16:11:25,653 INFO L226 Difference]: Without dead ends: 82 [2020-10-12 16:11:25,654 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 598 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=1340, Invalid=4210, Unknown=0, NotChecked=0, Total=5550 [2020-10-12 16:11:25,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-12 16:11:25,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2020-10-12 16:11:25,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-12 16:11:25,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 82 transitions. [2020-10-12 16:11:25,661 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 82 transitions. Word has length 79 [2020-10-12 16:11:25,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:11:25,661 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 82 transitions. [2020-10-12 16:11:25,661 INFO L480 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-12 16:11:25,661 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 82 transitions. [2020-10-12 16:11:25,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-12 16:11:25,662 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:11:25,662 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:11:25,662 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-12 16:11:25,662 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:11:25,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:11:25,662 INFO L82 PathProgramCache]: Analyzing trace with hash -334892663, now seen corresponding path program 35 times [2020-10-12 16:11:25,663 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:11:25,663 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [948315127] [2020-10-12 16:11:25,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:11:25,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:11:25,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:25,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:25,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:25,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:25,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:26,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:26,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:26,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:26,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:26,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:26,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:26,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:26,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:26,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:26,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:26,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:26,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:26,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:26,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:26,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:26,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:26,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:26,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:26,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:26,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:26,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:26,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:27,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:27,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:27,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:27,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:27,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:27,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:27,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:27,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:28,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:30,675 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:11:30,675 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-12 16:11:30,675 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 36 [2020-10-12 16:11:30,675 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-12 16:11:30,676 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:11:30,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-10-12 16:11:30,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 16:11:30,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-10-12 16:11:30,676 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:11:31,974 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:11:31,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:11:31,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:31,976 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:11:31,976 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:11:31,976 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:11:31,976 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:11:31,976 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:11:31,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:11:31,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:11:31,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:11:31,977 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:11:31,985 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:11:31,985 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [948315127] [2020-10-12 16:11:31,985 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:11:31,985 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-12 16:11:31,986 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370993975] [2020-10-12 16:11:31,986 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-12 16:11:31,986 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:11:31,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-12 16:11:31,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=1560, Unknown=0, NotChecked=0, Total=1640 [2020-10-12 16:11:31,987 INFO L87 Difference]: Start difference. First operand 82 states and 82 transitions. Second operand 41 states. [2020-10-12 16:11:35,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:11:35,640 INFO L93 Difference]: Finished difference Result 89 states and 89 transitions. [2020-10-12 16:11:35,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-12 16:11:35,642 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 81 [2020-10-12 16:11:35,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:11:35,643 INFO L225 Difference]: With dead ends: 89 [2020-10-12 16:11:35,643 INFO L226 Difference]: Without dead ends: 84 [2020-10-12 16:11:35,644 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 633 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=1414, Invalid=4438, Unknown=0, NotChecked=0, Total=5852 [2020-10-12 16:11:35,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-12 16:11:35,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2020-10-12 16:11:35,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-12 16:11:35,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 84 transitions. [2020-10-12 16:11:35,651 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 84 transitions. Word has length 81 [2020-10-12 16:11:35,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:11:35,652 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 84 transitions. [2020-10-12 16:11:35,652 INFO L480 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-12 16:11:35,652 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 84 transitions. [2020-10-12 16:11:35,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-12 16:11:35,652 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:11:35,653 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:11:35,653 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-12 16:11:35,653 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:11:35,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:11:35,653 INFO L82 PathProgramCache]: Analyzing trace with hash 1426059207, now seen corresponding path program 36 times [2020-10-12 16:11:35,653 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:11:35,653 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [326633467] [2020-10-12 16:11:35,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:11:35,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:11:35,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:35,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:36,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:36,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:36,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:36,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:36,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:36,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:36,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:36,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:36,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:36,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:36,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:36,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:36,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:36,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:36,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:36,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:36,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:36,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:36,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:36,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:36,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:36,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:36,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:36,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:36,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:36,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:36,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:36,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:36,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:37,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:37,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:37,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:37,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:37,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:38,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:40,666 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:11:40,666 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-12 16:11:40,667 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 37 [2020-10-12 16:11:40,667 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-12 16:11:40,667 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:11:40,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 41 [2020-10-12 16:11:40,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 16:11:40,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 79 [2020-10-12 16:11:40,667 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:11:42,036 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:11:42,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:11:42,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:42,038 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:11:42,038 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:11:42,038 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:11:42,039 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:11:42,039 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:11:42,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:11:42,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:11:42,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:11:42,039 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:11:42,048 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:11:42,049 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [326633467] [2020-10-12 16:11:42,049 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:11:42,049 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-10-12 16:11:42,049 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214896984] [2020-10-12 16:11:42,049 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-10-12 16:11:42,050 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:11:42,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-10-12 16:11:42,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=1640, Unknown=0, NotChecked=0, Total=1722 [2020-10-12 16:11:42,050 INFO L87 Difference]: Start difference. First operand 84 states and 84 transitions. Second operand 42 states. [2020-10-12 16:11:45,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:11:45,969 INFO L93 Difference]: Finished difference Result 91 states and 91 transitions. [2020-10-12 16:11:45,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-12 16:11:45,970 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 83 [2020-10-12 16:11:45,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:11:45,971 INFO L225 Difference]: With dead ends: 91 [2020-10-12 16:11:45,971 INFO L226 Difference]: Without dead ends: 86 [2020-10-12 16:11:45,972 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 669 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=1490, Invalid=4672, Unknown=0, NotChecked=0, Total=6162 [2020-10-12 16:11:45,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-12 16:11:45,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2020-10-12 16:11:45,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-12 16:11:45,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 86 transitions. [2020-10-12 16:11:45,980 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 86 transitions. Word has length 83 [2020-10-12 16:11:45,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:11:45,981 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 86 transitions. [2020-10-12 16:11:45,981 INFO L480 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-10-12 16:11:45,981 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 86 transitions. [2020-10-12 16:11:45,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-12 16:11:45,982 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:11:45,982 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:11:45,982 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-12 16:11:45,982 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:11:45,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:11:45,983 INFO L82 PathProgramCache]: Analyzing trace with hash 1483691653, now seen corresponding path program 37 times [2020-10-12 16:11:45,983 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:11:45,983 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [497702516] [2020-10-12 16:11:45,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:11:45,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:11:46,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:46,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:46,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:46,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:46,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:46,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:46,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:46,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:46,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:46,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:46,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:46,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:46,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:46,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:46,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:46,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:46,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:46,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:46,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:46,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:46,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:46,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:46,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:46,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:46,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:46,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:46,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:46,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:46,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:46,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:46,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:46,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:46,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:46,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:46,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:46,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:46,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:47,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:50,998 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:11:50,998 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-10-12 16:11:50,998 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 38 [2020-10-12 16:11:50,998 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-12 16:11:50,998 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:11:50,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 42 [2020-10-12 16:11:50,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 16:11:50,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 81 [2020-10-12 16:11:50,999 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:11:52,405 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:11:52,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:11:52,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:52,407 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:11:52,407 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:11:52,407 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:11:52,407 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:11:52,408 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:11:52,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:11:52,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:11:52,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:11:52,408 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:11:52,417 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:11:52,418 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [497702516] [2020-10-12 16:11:52,418 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:11:52,418 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-10-12 16:11:52,418 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539502217] [2020-10-12 16:11:52,418 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-10-12 16:11:52,419 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:11:52,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-10-12 16:11:52,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=1722, Unknown=0, NotChecked=0, Total=1806 [2020-10-12 16:11:52,419 INFO L87 Difference]: Start difference. First operand 86 states and 86 transitions. Second operand 43 states. [2020-10-12 16:11:56,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:11:56,657 INFO L93 Difference]: Finished difference Result 93 states and 93 transitions. [2020-10-12 16:11:56,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-12 16:11:56,659 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 85 [2020-10-12 16:11:56,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:11:56,660 INFO L225 Difference]: With dead ends: 93 [2020-10-12 16:11:56,660 INFO L226 Difference]: Without dead ends: 88 [2020-10-12 16:11:56,661 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 706 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=1568, Invalid=4912, Unknown=0, NotChecked=0, Total=6480 [2020-10-12 16:11:56,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-12 16:11:56,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2020-10-12 16:11:56,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-12 16:11:56,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 88 transitions. [2020-10-12 16:11:56,670 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 88 transitions. Word has length 85 [2020-10-12 16:11:56,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:11:56,670 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 88 transitions. [2020-10-12 16:11:56,670 INFO L480 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-10-12 16:11:56,670 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 88 transitions. [2020-10-12 16:11:56,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-10-12 16:11:56,671 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:11:56,671 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:11:56,671 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-12 16:11:56,671 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:11:56,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:11:56,672 INFO L82 PathProgramCache]: Analyzing trace with hash 1033897411, now seen corresponding path program 38 times [2020-10-12 16:11:56,672 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:11:56,672 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1061226965] [2020-10-12 16:11:56,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:11:56,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:11:56,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:56,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:56,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:57,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:57,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:57,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:57,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:57,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:57,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:57,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:57,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:57,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:57,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:57,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:57,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:57,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:57,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:57,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:58,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:58,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:58,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:58,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:58,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:58,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:58,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:59,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:59,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:59,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:59,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:59,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:00,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:00,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:00,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:00,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:00,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:01,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:01,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:01,691 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:12:01,691 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-12 16:12:01,691 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 37 [2020-10-12 16:12:01,691 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-12 16:12:01,692 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:12:01,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 41 [2020-10-12 16:12:01,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 16:12:01,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-10-12 16:12:01,692 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:12:03,040 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:12:03,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:12:03,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:03,042 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:12:03,042 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:12:03,043 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:12:03,043 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:12:03,043 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:12:03,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:12:03,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:12:03,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:12:03,044 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:12:03,053 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:12:03,053 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1061226965] [2020-10-12 16:12:03,053 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:12:03,053 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-10-12 16:12:03,054 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308359270] [2020-10-12 16:12:03,054 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-10-12 16:12:03,054 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:12:03,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-10-12 16:12:03,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=1641, Unknown=0, NotChecked=0, Total=1722 [2020-10-12 16:12:03,054 INFO L87 Difference]: Start difference. First operand 88 states and 88 transitions. Second operand 42 states. [2020-10-12 16:12:08,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:12:08,061 INFO L93 Difference]: Finished difference Result 97 states and 98 transitions. [2020-10-12 16:12:08,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-12 16:12:08,061 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 87 [2020-10-12 16:12:08,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:12:08,062 INFO L225 Difference]: With dead ends: 97 [2020-10-12 16:12:08,063 INFO L226 Difference]: Without dead ends: 92 [2020-10-12 16:12:08,063 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 779 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=1754, Invalid=4888, Unknown=0, NotChecked=0, Total=6642 [2020-10-12 16:12:08,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-12 16:12:08,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2020-10-12 16:12:08,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-12 16:12:08,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 92 transitions. [2020-10-12 16:12:08,070 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 92 transitions. Word has length 87 [2020-10-12 16:12:08,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:12:08,071 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 92 transitions. [2020-10-12 16:12:08,071 INFO L480 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-10-12 16:12:08,071 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 92 transitions. [2020-10-12 16:12:08,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-10-12 16:12:08,072 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:12:08,072 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:12:08,072 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-12 16:12:08,072 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:12:08,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:12:08,073 INFO L82 PathProgramCache]: Analyzing trace with hash 202161599, now seen corresponding path program 39 times [2020-10-12 16:12:08,073 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:12:08,073 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [933057554] [2020-10-12 16:12:08,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:12:08,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:12:08,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:08,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:08,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:08,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:08,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:08,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:08,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:08,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:08,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:08,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:08,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:08,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:08,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:08,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:08,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:08,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:08,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:08,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:08,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:08,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:08,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:08,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:08,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:08,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:08,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:08,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:09,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:09,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:09,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:09,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:09,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:09,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:09,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:09,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:09,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:09,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:09,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:09,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:09,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:09,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:10,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:13,087 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:12:13,087 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 99 [2020-10-12 16:12:13,087 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 41 [2020-10-12 16:12:13,087 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-12 16:12:13,088 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:12:13,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 45 [2020-10-12 16:12:13,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 16:12:13,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 87 [2020-10-12 16:12:13,088 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:12:14,848 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:12:14,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:12:14,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:14,850 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:12:14,850 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:12:14,850 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:12:14,850 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:12:14,851 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:12:14,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:12:14,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:12:14,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:12:14,851 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:12:14,862 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:12:14,862 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [933057554] [2020-10-12 16:12:14,862 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:12:14,862 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2020-10-12 16:12:14,862 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988725259] [2020-10-12 16:12:14,862 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-10-12 16:12:14,863 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:12:14,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-10-12 16:12:14,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=1980, Unknown=0, NotChecked=0, Total=2070 [2020-10-12 16:12:14,863 INFO L87 Difference]: Start difference. First operand 92 states and 92 transitions. Second operand 46 states. [2020-10-12 16:12:20,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:12:20,074 INFO L93 Difference]: Finished difference Result 99 states and 99 transitions. [2020-10-12 16:12:20,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-12 16:12:20,076 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 91 [2020-10-12 16:12:20,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:12:20,077 INFO L225 Difference]: With dead ends: 99 [2020-10-12 16:12:20,077 INFO L226 Difference]: Without dead ends: 94 [2020-10-12 16:12:20,078 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 823 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=1814, Invalid=5668, Unknown=0, NotChecked=0, Total=7482 [2020-10-12 16:12:20,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-10-12 16:12:20,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2020-10-12 16:12:20,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-12 16:12:20,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 94 transitions. [2020-10-12 16:12:20,085 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 94 transitions. Word has length 91 [2020-10-12 16:12:20,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:12:20,086 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 94 transitions. [2020-10-12 16:12:20,086 INFO L480 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-10-12 16:12:20,086 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 94 transitions. [2020-10-12 16:12:20,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-10-12 16:12:20,087 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:12:20,087 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:12:20,087 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-12 16:12:20,087 INFO L427 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:12:20,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:12:20,088 INFO L82 PathProgramCache]: Analyzing trace with hash 2139129469, now seen corresponding path program 40 times [2020-10-12 16:12:20,088 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:12:20,088 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [850835030] [2020-10-12 16:12:20,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:12:20,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:12:20,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:20,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:20,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:20,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:20,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:20,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:20,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:20,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:20,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:20,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:20,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:20,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:20,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:20,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:20,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:20,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:20,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:20,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:20,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:20,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:20,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:20,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:20,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:21,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:21,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:21,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:21,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:21,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:21,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:21,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:21,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:21,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:21,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:21,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:21,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:21,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:21,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:21,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:21,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:22,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:22,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:22,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:25,106 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:12:25,106 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-12 16:12:25,106 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 42 [2020-10-12 16:12:25,106 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-12 16:12:25,106 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:12:25,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 46 [2020-10-12 16:12:25,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 16:12:25,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 89 [2020-10-12 16:12:25,107 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:12:26,978 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:12:26,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:12:26,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:26,980 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:12:26,981 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:12:26,981 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:12:26,981 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:12:26,981 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:12:26,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:12:26,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:12:26,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:12:26,982 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:12:26,993 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:12:26,993 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [850835030] [2020-10-12 16:12:26,993 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:12:26,993 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2020-10-12 16:12:26,993 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697418513] [2020-10-12 16:12:26,994 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-10-12 16:12:26,994 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:12:26,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-10-12 16:12:26,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=2070, Unknown=0, NotChecked=0, Total=2162 [2020-10-12 16:12:26,994 INFO L87 Difference]: Start difference. First operand 94 states and 94 transitions. Second operand 47 states. [2020-10-12 16:12:27,177 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 11 [2020-10-12 16:12:32,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:12:32,679 INFO L93 Difference]: Finished difference Result 101 states and 101 transitions. [2020-10-12 16:12:32,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-12 16:12:32,680 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 93 [2020-10-12 16:12:32,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:12:32,682 INFO L225 Difference]: With dead ends: 101 [2020-10-12 16:12:32,682 INFO L226 Difference]: Without dead ends: 96 [2020-10-12 16:12:32,683 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 864 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=1900, Invalid=5932, Unknown=0, NotChecked=0, Total=7832 [2020-10-12 16:12:32,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-12 16:12:32,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2020-10-12 16:12:32,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-10-12 16:12:32,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 96 transitions. [2020-10-12 16:12:32,692 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 96 transitions. Word has length 93 [2020-10-12 16:12:32,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:12:32,693 INFO L479 AbstractCegarLoop]: Abstraction has 96 states and 96 transitions. [2020-10-12 16:12:32,693 INFO L480 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-10-12 16:12:32,693 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 96 transitions. [2020-10-12 16:12:32,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-10-12 16:12:32,694 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:12:32,694 INFO L422 BasicCegarLoop]: trace histogram [42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:12:32,694 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-12 16:12:32,694 INFO L427 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:12:32,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:12:32,695 INFO L82 PathProgramCache]: Analyzing trace with hash -450553925, now seen corresponding path program 41 times [2020-10-12 16:12:32,695 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:12:32,695 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1477396617] [2020-10-12 16:12:32,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:12:32,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:12:32,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:32,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:33,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:33,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:33,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:33,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:33,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:33,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:33,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:33,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:33,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:33,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:33,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:33,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:33,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:33,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:33,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:33,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:33,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:33,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:33,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:33,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:34,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:34,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:34,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:34,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:34,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:34,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:34,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:34,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:34,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:34,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:35,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:35,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:35,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:35,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:35,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:35,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:35,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:36,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:36,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:36,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:36,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:37,708 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:12:37,708 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 103 [2020-10-12 16:12:37,709 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 43 [2020-10-12 16:12:37,709 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-12 16:12:37,709 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:12:37,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 47 [2020-10-12 16:12:37,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 16:12:37,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 91 [2020-10-12 16:12:37,710 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:12:39,752 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:12:39,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:12:39,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:39,754 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:12:39,754 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:12:39,754 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:12:39,754 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:12:39,754 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:12:39,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:12:39,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:12:39,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:12:39,755 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:12:39,770 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 0 proven. 1764 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:12:39,770 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1477396617] [2020-10-12 16:12:39,770 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:12:39,771 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2020-10-12 16:12:39,771 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653066100] [2020-10-12 16:12:39,771 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-10-12 16:12:39,771 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:12:39,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-10-12 16:12:39,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=2162, Unknown=0, NotChecked=0, Total=2256 [2020-10-12 16:12:39,772 INFO L87 Difference]: Start difference. First operand 96 states and 96 transitions. Second operand 48 states. [2020-10-12 16:12:39,943 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 11 [2020-10-12 16:12:40,084 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 11 [2020-10-12 16:12:40,216 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 11 [2020-10-12 16:12:40,490 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 11 [2020-10-12 16:12:45,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:12:45,897 INFO L93 Difference]: Finished difference Result 103 states and 103 transitions. [2020-10-12 16:12:45,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-10-12 16:12:45,898 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 95 [2020-10-12 16:12:45,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:12:45,900 INFO L225 Difference]: With dead ends: 103 [2020-10-12 16:12:45,900 INFO L226 Difference]: Without dead ends: 98 [2020-10-12 16:12:45,901 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 906 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=1988, Invalid=6202, Unknown=0, NotChecked=0, Total=8190 [2020-10-12 16:12:45,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-12 16:12:45,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2020-10-12 16:12:45,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-12 16:12:45,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 98 transitions. [2020-10-12 16:12:45,911 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 98 transitions. Word has length 95 [2020-10-12 16:12:45,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:12:45,911 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 98 transitions. [2020-10-12 16:12:45,911 INFO L480 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-10-12 16:12:45,911 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 98 transitions. [2020-10-12 16:12:45,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-10-12 16:12:45,912 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:12:45,912 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:12:45,912 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-12 16:12:45,913 INFO L427 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:12:45,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:12:45,913 INFO L82 PathProgramCache]: Analyzing trace with hash 1944736121, now seen corresponding path program 42 times [2020-10-12 16:12:45,913 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:12:45,913 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1968252580] [2020-10-12 16:12:45,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:12:45,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:12:45,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:46,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:46,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:46,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:46,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:46,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:46,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:46,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:46,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:46,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:46,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:46,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:46,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:46,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:46,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:46,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:46,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:46,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:46,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:46,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:46,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:46,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:46,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:46,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:47,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:47,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:47,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:47,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:47,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:47,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:47,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:47,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:48,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:48,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:48,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:48,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:49,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:49,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:49,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:49,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:49,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:50,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:50,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:50,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:50,965 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:12:50,965 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 105 [2020-10-12 16:12:50,965 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 44 [2020-10-12 16:12:50,965 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5032 [2020-10-12 16:12:50,966 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:12:50,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 48 [2020-10-12 16:12:50,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 16:12:50,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 93 [2020-10-12 16:12:50,966 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:12:53,177 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:12:53,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:12:53,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:53,179 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:12:53,179 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:12:53,180 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:12:53,180 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:12:53,180 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:12:53,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:12:53,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:12:53,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:12:53,181 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:12:53,193 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 0 proven. 1849 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:12:53,193 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1968252580] [2020-10-12 16:12:53,193 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:12:53,193 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2020-10-12 16:12:53,193 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368051074] [2020-10-12 16:12:53,193 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-10-12 16:12:53,193 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:12:53,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-10-12 16:12:53,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=2256, Unknown=0, NotChecked=0, Total=2352 [2020-10-12 16:12:53,194 INFO L87 Difference]: Start difference. First operand 98 states and 98 transitions. Second operand 49 states. [2020-10-12 16:12:53,431 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 11 [2020-10-12 16:12:53,575 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 11 [2020-10-12 16:12:53,725 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 11 [2020-10-12 16:12:53,869 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 11 [2020-10-12 16:12:54,013 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 11 [2020-10-12 16:12:54,161 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 11 [2020-10-12 16:12:54,314 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 11 [2020-10-12 16:13:00,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:13:00,074 INFO L93 Difference]: Finished difference Result 105 states and 105 transitions. [2020-10-12 16:13:00,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-10-12 16:13:00,076 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 97 [2020-10-12 16:13:00,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:13:00,077 INFO L225 Difference]: With dead ends: 105 [2020-10-12 16:13:00,077 INFO L226 Difference]: Without dead ends: 100 [2020-10-12 16:13:00,078 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 949 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=2078, Invalid=6478, Unknown=0, NotChecked=0, Total=8556 [2020-10-12 16:13:00,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-12 16:13:00,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2020-10-12 16:13:00,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-10-12 16:13:00,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 100 transitions. [2020-10-12 16:13:00,088 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 100 transitions. Word has length 97 [2020-10-12 16:13:00,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:13:00,088 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 100 transitions. [2020-10-12 16:13:00,088 INFO L480 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-10-12 16:13:00,088 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 100 transitions. [2020-10-12 16:13:00,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-10-12 16:13:00,089 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:13:00,089 INFO L422 BasicCegarLoop]: trace histogram [44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:13:00,089 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-12 16:13:00,090 INFO L427 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:13:00,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:13:00,090 INFO L82 PathProgramCache]: Analyzing trace with hash 1715999671, now seen corresponding path program 43 times [2020-10-12 16:13:00,090 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:13:00,090 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1984092663] [2020-10-12 16:13:00,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:13:00,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:13:00,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:00,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:00,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:00,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:00,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:00,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:00,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:00,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:00,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:00,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:00,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:00,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:00,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:00,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:00,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:00,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:01,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:01,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:01,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:01,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:01,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:01,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:01,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:01,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:01,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:02,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:02,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:02,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:02,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:02,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:02,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:03,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:03,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:03,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:04,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:04,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:04,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:05,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:05,157 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:13:05,157 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 107 [2020-10-12 16:13:05,157 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 38 [2020-10-12 16:13:05,157 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5052 [2020-10-12 16:13:05,157 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:13:05,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 47 [2020-10-12 16:13:05,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 16:13:05,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 90 [2020-10-12 16:13:05,158 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:13:07,332 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:13:07,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:13:07,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:07,333 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:13:07,333 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:13:07,334 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:13:07,334 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:13:07,334 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:13:07,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:13:07,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:13:07,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:13:07,334 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:13:07,346 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 0 proven. 1936 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:13:07,346 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1984092663] [2020-10-12 16:13:07,346 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:13:07,346 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2020-10-12 16:13:07,347 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492755233] [2020-10-12 16:13:07,347 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-10-12 16:13:07,347 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:13:07,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-10-12 16:13:07,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=2163, Unknown=0, NotChecked=0, Total=2256 [2020-10-12 16:13:07,348 INFO L87 Difference]: Start difference. First operand 100 states and 100 transitions. Second operand 48 states. [2020-10-12 16:13:07,681 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 10 [2020-10-12 16:13:07,836 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 9 [2020-10-12 16:13:08,005 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 11 [2020-10-12 16:13:08,172 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 11 [2020-10-12 16:13:08,333 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 11 [2020-10-12 16:13:08,508 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 11 [2020-10-12 16:13:08,687 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 11 [2020-10-12 16:13:08,862 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 11 [2020-10-12 16:13:09,034 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 11 [2020-10-12 16:13:09,227 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 11 [2020-10-12 16:13:09,406 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 11 [2020-10-12 16:13:09,589 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 11 [2020-10-12 16:13:15,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:13:15,465 INFO L93 Difference]: Finished difference Result 109 states and 110 transitions. [2020-10-12 16:13:15,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-10-12 16:13:15,467 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 99 [2020-10-12 16:13:15,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:13:15,468 INFO L225 Difference]: With dead ends: 109 [2020-10-12 16:13:15,468 INFO L226 Difference]: Without dead ends: 104 [2020-10-12 16:13:15,469 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1034 ImplicationChecksByTransitivity, 9.9s TimeCoverageRelationStatistics Valid=2278, Invalid=6464, Unknown=0, NotChecked=0, Total=8742 [2020-10-12 16:13:15,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-10-12 16:13:15,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2020-10-12 16:13:15,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-12 16:13:15,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 104 transitions. [2020-10-12 16:13:15,478 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 104 transitions. Word has length 99 [2020-10-12 16:13:15,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:13:15,478 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 104 transitions. [2020-10-12 16:13:15,478 INFO L480 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-10-12 16:13:15,478 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 104 transitions. [2020-10-12 16:13:15,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-10-12 16:13:15,479 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:13:15,479 INFO L422 BasicCegarLoop]: trace histogram [46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:13:15,479 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-12 16:13:15,479 INFO L427 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:13:15,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:13:15,479 INFO L82 PathProgramCache]: Analyzing trace with hash 1700049331, now seen corresponding path program 44 times [2020-10-12 16:13:15,479 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:13:15,480 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [914664161] [2020-10-12 16:13:15,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:13:15,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:13:15,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:15,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:15,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:15,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:15,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:15,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:15,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:16,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:16,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:16,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:16,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:16,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:16,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:16,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:16,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:16,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:16,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:16,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:16,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:16,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:16,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:16,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:16,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:16,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:16,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:16,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:16,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:16,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:16,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:16,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:16,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:16,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:16,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:16,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:16,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:16,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:16,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:16,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:16,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:16,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:16,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:17,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:17,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:17,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:17,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:18,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:18,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:20,496 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:13:20,496 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 111 [2020-10-12 16:13:20,496 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 47 [2020-10-12 16:13:20,496 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-12 16:13:20,496 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:13:20,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 51 [2020-10-12 16:13:20,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 16:13:20,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 99 [2020-10-12 16:13:20,497 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:13:23,167 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:13:23,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:13:23,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:23,169 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:13:23,169 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:13:23,169 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:13:23,169 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:13:23,169 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:13:23,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:13:23,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:13:23,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:13:23,170 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:13:23,182 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:13:23,182 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [914664161] [2020-10-12 16:13:23,182 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:13:23,183 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52] total 52 [2020-10-12 16:13:23,183 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781893740] [2020-10-12 16:13:23,185 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-10-12 16:13:23,185 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:13:23,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-10-12 16:13:23,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=2550, Unknown=0, NotChecked=0, Total=2652 [2020-10-12 16:13:23,187 INFO L87 Difference]: Start difference. First operand 104 states and 104 transitions. Second operand 52 states. [2020-10-12 16:13:23,423 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 11 [2020-10-12 16:13:23,596 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 11 [2020-10-12 16:13:23,762 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 11 [2020-10-12 16:13:23,926 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 11 [2020-10-12 16:13:24,101 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 11 [2020-10-12 16:13:24,270 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 11 [2020-10-12 16:13:24,438 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 11 [2020-10-12 16:13:24,613 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 11 [2020-10-12 16:13:24,789 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 11 [2020-10-12 16:13:24,970 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 11 [2020-10-12 16:13:25,151 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 11 [2020-10-12 16:13:25,335 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 11