/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=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.4 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.5.2.ufo.BOUNDED-10.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-14 09:16:44,300 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-14 09:16:44,302 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-14 09:16:44,334 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-14 09:16:44,334 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-14 09:16:44,342 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-14 09:16:44,344 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-14 09:16:44,347 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-14 09:16:44,349 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-14 09:16:44,350 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-14 09:16:44,351 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-14 09:16:44,353 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-14 09:16:44,353 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-14 09:16:44,356 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-14 09:16:44,357 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-14 09:16:44,358 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-14 09:16:44,359 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-14 09:16:44,362 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-14 09:16:44,363 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-14 09:16:44,369 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-14 09:16:44,372 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-14 09:16:44,373 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-14 09:16:44,375 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-14 09:16:44,375 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-14 09:16:44,386 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-14 09:16:44,386 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-14 09:16:44,387 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-14 09:16:44,390 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-14 09:16:44,390 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-14 09:16:44,391 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-14 09:16:44,391 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-14 09:16:44,393 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-14 09:16:44,394 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-14 09:16:44,395 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-14 09:16:44,396 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-14 09:16:44,396 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-14 09:16:44,396 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-14 09:16:44,397 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-14 09:16:44,397 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-14 09:16:44,398 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-14 09:16:44,399 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-14 09:16:44,400 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-14 09:16:44,438 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-14 09:16:44,438 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-14 09:16:44,440 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-14 09:16:44,440 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-14 09:16:44,440 INFO L138 SettingsManager]: * Use SBE=true [2020-10-14 09:16:44,441 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-14 09:16:44,441 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-14 09:16:44,441 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-14 09:16:44,441 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-14 09:16:44,442 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-14 09:16:44,442 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-14 09:16:44,443 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-14 09:16:44,443 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-14 09:16:44,443 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-14 09:16:44,444 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-14 09:16:44,444 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-14 09:16:44,444 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-14 09:16:44,444 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-14 09:16:44,445 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-14 09:16:44,445 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-14 09:16:44,445 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-14 09:16:44,445 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 09:16:44,445 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-14 09:16:44,445 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-14 09:16:44,446 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-14 09:16:44,446 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-14 09:16:44,446 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-14 09:16:44,446 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-14 09:16:44,446 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-14 09:16:44,446 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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; [2020-10-14 09:16:44,781 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-14 09:16:44,793 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-14 09:16:44,797 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-14 09:16:44,798 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-14 09:16:44,799 INFO L275 PluginConnector]: CDTParser initialized [2020-10-14 09:16:44,799 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.5.2.ufo.BOUNDED-10.pals.c.v+cfa-reducer.c [2020-10-14 09:16:44,857 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0633c07e8/85d24699b794474099cd98b6e109c033/FLAG5f4d49184 [2020-10-14 09:16:45,401 INFO L306 CDTParser]: Found 1 translation units. [2020-10-14 09:16:45,402 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.5.2.ufo.BOUNDED-10.pals.c.v+cfa-reducer.c [2020-10-14 09:16:45,413 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0633c07e8/85d24699b794474099cd98b6e109c033/FLAG5f4d49184 [2020-10-14 09:16:45,684 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0633c07e8/85d24699b794474099cd98b6e109c033 [2020-10-14 09:16:45,693 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-14 09:16:45,695 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-14 09:16:45,696 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-14 09:16:45,696 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-14 09:16:45,699 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-14 09:16:45,700 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:16:45" (1/1) ... [2020-10-14 09:16:45,704 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3afd2ce4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:16:45, skipping insertion in model container [2020-10-14 09:16:45,705 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:16:45" (1/1) ... [2020-10-14 09:16:45,715 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-14 09:16:45,784 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-14 09:16:46,048 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 09:16:46,061 INFO L203 MainTranslator]: Completed pre-run [2020-10-14 09:16:46,253 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 09:16:46,277 INFO L208 MainTranslator]: Completed translation [2020-10-14 09:16:46,277 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:16:46 WrapperNode [2020-10-14 09:16:46,277 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-14 09:16:46,278 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-14 09:16:46,278 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-14 09:16:46,278 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-14 09:16:46,290 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:16:46" (1/1) ... [2020-10-14 09:16:46,290 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:16:46" (1/1) ... [2020-10-14 09:16:46,303 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:16:46" (1/1) ... [2020-10-14 09:16:46,304 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:16:46" (1/1) ... [2020-10-14 09:16:46,319 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:16:46" (1/1) ... [2020-10-14 09:16:46,329 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:16:46" (1/1) ... [2020-10-14 09:16:46,333 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:16:46" (1/1) ... [2020-10-14 09:16:46,338 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-14 09:16:46,339 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-14 09:16:46,339 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-14 09:16:46,339 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-14 09:16:46,340 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:16:46" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 09:16:46,411 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-14 09:16:46,411 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-14 09:16:46,411 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-14 09:16:46,412 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-14 09:16:46,412 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-14 09:16:46,412 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-14 09:16:46,412 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-14 09:16:46,412 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-14 09:16:46,412 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-14 09:16:46,412 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-14 09:16:46,413 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-14 09:16:46,413 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-14 09:16:46,413 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-14 09:16:46,413 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-14 09:16:46,413 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-14 09:16:46,413 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-14 09:16:46,414 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-10-14 09:16:46,414 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-14 09:16:46,414 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-14 09:16:46,414 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-14 09:16:46,414 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-14 09:16:46,414 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-14 09:16:47,132 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-14 09:16:47,132 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-14 09:16:47,144 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:16:47 BoogieIcfgContainer [2020-10-14 09:16:47,144 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-14 09:16:47,147 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-14 09:16:47,147 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-14 09:16:47,151 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-14 09:16:47,151 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 09:16:45" (1/3) ... [2020-10-14 09:16:47,152 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2514e19e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:16:47, skipping insertion in model container [2020-10-14 09:16:47,152 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:16:46" (2/3) ... [2020-10-14 09:16:47,153 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2514e19e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:16:47, skipping insertion in model container [2020-10-14 09:16:47,153 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:16:47" (3/3) ... [2020-10-14 09:16:47,156 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.5.2.ufo.BOUNDED-10.pals.c.v+cfa-reducer.c [2020-10-14 09:16:47,167 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-14 09:16:47,180 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-14 09:16:47,195 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-14 09:16:47,223 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-14 09:16:47,224 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-14 09:16:47,224 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-14 09:16:47,224 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-14 09:16:47,224 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-14 09:16:47,224 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-14 09:16:47,224 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-14 09:16:47,225 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-14 09:16:47,243 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states. [2020-10-14 09:16:47,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-14 09:16:47,253 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:16:47,255 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:16:47,255 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:16:47,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:16:47,260 INFO L82 PathProgramCache]: Analyzing trace with hash 945833182, now seen corresponding path program 1 times [2020-10-14 09:16:47,268 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:16:47,269 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1348922323] [2020-10-14 09:16:47,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:16:47,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:16:47,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:16:47,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:16:47,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:16:48,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:16:48,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:16:49,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:16:52,603 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:16:52,604 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-14 09:16:52,604 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 09:16:52,604 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-14 09:16:52,607 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:16:52,608 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:16:52,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:16:52,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-14 09:16:52,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-14 09:16:52,609 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-14 09:16:52,947 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-14 09:16:52,949 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:16:52,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:16:52,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:16:52,966 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:16:52,966 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:16:52,967 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:16:52,967 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-14 09:16:52,967 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:16:52,967 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:16:52,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:16:52,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:16:52,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:16:52,968 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:16:52,990 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:16:52,991 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1348922323] [2020-10-14 09:16:52,993 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:16:52,993 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:16:52,994 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773656372] [2020-10-14 09:16:52,999 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:16:53,000 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:16:53,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:16:53,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:16:53,017 INFO L87 Difference]: Start difference. First operand 136 states. Second operand 4 states. [2020-10-14 09:16:53,284 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2020-10-14 09:16:54,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:16:54,286 INFO L93 Difference]: Finished difference Result 314 states and 505 transitions. [2020-10-14 09:16:54,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 09:16:54,289 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 64 [2020-10-14 09:16:54,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:16:54,316 INFO L225 Difference]: With dead ends: 314 [2020-10-14 09:16:54,317 INFO L226 Difference]: Without dead ends: 209 [2020-10-14 09:16:54,322 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 09:16:54,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2020-10-14 09:16:54,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 207. [2020-10-14 09:16:54,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 207 states. [2020-10-14 09:16:54,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 307 transitions. [2020-10-14 09:16:54,425 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 307 transitions. Word has length 64 [2020-10-14 09:16:54,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:16:54,426 INFO L479 AbstractCegarLoop]: Abstraction has 207 states and 307 transitions. [2020-10-14 09:16:54,426 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:16:54,426 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 307 transitions. [2020-10-14 09:16:54,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-14 09:16:54,436 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:16:54,437 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:16:54,437 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-14 09:16:54,437 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:16:54,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:16:54,438 INFO L82 PathProgramCache]: Analyzing trace with hash 1338216276, now seen corresponding path program 1 times [2020-10-14 09:16:54,438 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:16:54,439 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1530791796] [2020-10-14 09:16:54,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:16:54,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:16:54,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:16:54,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:16:54,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:16:54,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:16:55,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:16:57,615 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:16:57,616 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-14 09:16:57,616 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 09:16:57,616 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3138 [2020-10-14 09:16:57,616 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:16:57,616 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:16:57,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:16:57,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-14 09:16:57,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-14 09:16:57,617 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:16:57,829 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-14 09:16:57,831 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:16:57,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:16:57,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:16:57,850 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:16:57,851 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:16:57,851 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:16:57,851 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-14 09:16:57,851 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:16:57,852 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:16:57,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:16:57,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:16:57,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:16:57,853 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:16:57,871 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:16:57,872 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1530791796] [2020-10-14 09:16:57,872 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:16:57,872 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:16:57,872 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743167217] [2020-10-14 09:16:57,874 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:16:57,874 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:16:57,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:16:57,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:16:57,875 INFO L87 Difference]: Start difference. First operand 207 states and 307 transitions. Second operand 4 states. [2020-10-14 09:16:58,089 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2020-10-14 09:16:58,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:16:58,699 INFO L93 Difference]: Finished difference Result 511 states and 791 transitions. [2020-10-14 09:16:58,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 09:16:58,700 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 65 [2020-10-14 09:16:58,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:16:58,703 INFO L225 Difference]: With dead ends: 511 [2020-10-14 09:16:58,703 INFO L226 Difference]: Without dead ends: 343 [2020-10-14 09:16:58,706 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 09:16:58,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2020-10-14 09:16:58,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 341. [2020-10-14 09:16:58,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 341 states. [2020-10-14 09:16:58,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 520 transitions. [2020-10-14 09:16:58,733 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 520 transitions. Word has length 65 [2020-10-14 09:16:58,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:16:58,734 INFO L479 AbstractCegarLoop]: Abstraction has 341 states and 520 transitions. [2020-10-14 09:16:58,734 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:16:58,734 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 520 transitions. [2020-10-14 09:16:58,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-14 09:16:58,736 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:16:58,736 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:16:58,736 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-14 09:16:58,736 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:16:58,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:16:58,737 INFO L82 PathProgramCache]: Analyzing trace with hash -813117178, now seen corresponding path program 1 times [2020-10-14 09:16:58,737 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:16:58,737 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [765066465] [2020-10-14 09:16:58,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:16:58,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:16:58,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:16:58,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:16:58,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:16:59,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:17:00,138 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:17:00,139 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-14 09:17:00,139 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 09:17:00,139 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1368 [2020-10-14 09:17:00,140 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:17:00,140 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:17:00,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:17:00,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-14 09:17:00,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-14 09:17:00,141 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:17:00,346 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-14 09:17:00,347 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:17:00,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:17:00,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:17:00,369 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:17:00,370 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:17:00,370 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:17:00,370 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-14 09:17:00,371 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:17:00,371 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:17:00,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:17:00,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:17:00,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:17:00,373 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:17:00,397 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:17:00,397 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [765066465] [2020-10-14 09:17:00,398 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:17:00,398 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:17:00,398 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916397825] [2020-10-14 09:17:00,399 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:17:00,399 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:17:00,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:17:00,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:17:00,400 INFO L87 Difference]: Start difference. First operand 341 states and 520 transitions. Second operand 4 states. [2020-10-14 09:17:00,646 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2020-10-14 09:17:01,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:17:01,310 INFO L93 Difference]: Finished difference Result 881 states and 1378 transitions. [2020-10-14 09:17:01,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 09:17:01,311 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 66 [2020-10-14 09:17:01,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:17:01,316 INFO L225 Difference]: With dead ends: 881 [2020-10-14 09:17:01,316 INFO L226 Difference]: Without dead ends: 579 [2020-10-14 09:17:01,318 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 09:17:01,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 579 states. [2020-10-14 09:17:01,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 579 to 577. [2020-10-14 09:17:01,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 577 states. [2020-10-14 09:17:01,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 577 states to 577 states and 892 transitions. [2020-10-14 09:17:01,357 INFO L78 Accepts]: Start accepts. Automaton has 577 states and 892 transitions. Word has length 66 [2020-10-14 09:17:01,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:17:01,358 INFO L479 AbstractCegarLoop]: Abstraction has 577 states and 892 transitions. [2020-10-14 09:17:01,358 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:17:01,358 INFO L276 IsEmpty]: Start isEmpty. Operand 577 states and 892 transitions. [2020-10-14 09:17:01,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-14 09:17:01,360 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:17:01,360 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:17:01,360 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-14 09:17:01,361 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:17:01,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:17:01,361 INFO L82 PathProgramCache]: Analyzing trace with hash 543696349, now seen corresponding path program 1 times [2020-10-14 09:17:01,361 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:17:01,362 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1578224218] [2020-10-14 09:17:01,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:17:01,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:17:01,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:17:01,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:17:01,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:17:02,176 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:17:02,177 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-14 09:17:02,177 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 09:17:02,177 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 776 [2020-10-14 09:17:02,177 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:17:02,178 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:17:02,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:17:02,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-14 09:17:02,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-14 09:17:02,186 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 9 [2020-10-14 09:17:02,359 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-14 09:17:02,360 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:17:02,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:17:02,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:17:02,375 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:17:02,376 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:17:02,376 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:17:02,376 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-14 09:17:02,376 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:17:02,377 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:17:02,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:17:02,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:17:02,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:17:02,377 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:17:02,394 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:17:02,395 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1578224218] [2020-10-14 09:17:02,395 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:17:02,395 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:17:02,395 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831527820] [2020-10-14 09:17:02,396 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:17:02,396 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:17:02,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:17:02,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:17:02,397 INFO L87 Difference]: Start difference. First operand 577 states and 892 transitions. Second operand 4 states. [2020-10-14 09:17:02,570 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2020-10-14 09:17:03,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:17:03,382 INFO L93 Difference]: Finished difference Result 1565 states and 2454 transitions. [2020-10-14 09:17:03,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 09:17:03,383 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 67 [2020-10-14 09:17:03,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:17:03,390 INFO L225 Difference]: With dead ends: 1565 [2020-10-14 09:17:03,390 INFO L226 Difference]: Without dead ends: 1027 [2020-10-14 09:17:03,392 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 09:17:03,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1027 states. [2020-10-14 09:17:03,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1027 to 1025. [2020-10-14 09:17:03,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1025 states. [2020-10-14 09:17:03,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1025 states to 1025 states and 1592 transitions. [2020-10-14 09:17:03,446 INFO L78 Accepts]: Start accepts. Automaton has 1025 states and 1592 transitions. Word has length 67 [2020-10-14 09:17:03,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:17:03,446 INFO L479 AbstractCegarLoop]: Abstraction has 1025 states and 1592 transitions. [2020-10-14 09:17:03,446 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:17:03,446 INFO L276 IsEmpty]: Start isEmpty. Operand 1025 states and 1592 transitions. [2020-10-14 09:17:03,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-14 09:17:03,448 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:17:03,448 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:17:03,448 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-14 09:17:03,449 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:17:03,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:17:03,449 INFO L82 PathProgramCache]: Analyzing trace with hash -393527566, now seen corresponding path program 1 times [2020-10-14 09:17:03,449 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:17:03,450 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [380652923] [2020-10-14 09:17:03,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:17:03,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:17:03,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:17:03,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:17:03,857 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:17:03,857 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-14 09:17:03,857 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 09:17:03,858 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 380 [2020-10-14 09:17:03,858 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:17:03,858 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:17:03,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:17:03,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-14 09:17:03,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-14 09:17:03,859 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:17:04,025 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-14 09:17:04,026 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:17:04,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:17:04,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:17:04,038 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:17:04,039 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:17:04,039 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:17:04,039 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-14 09:17:04,040 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:17:04,040 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:17:04,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:17:04,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:17:04,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:17:04,041 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:17:04,061 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:17:04,062 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [380652923] [2020-10-14 09:17:04,062 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:17:04,062 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:17:04,063 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285011295] [2020-10-14 09:17:04,063 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:17:04,063 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:17:04,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:17:04,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:17:04,064 INFO L87 Difference]: Start difference. First operand 1025 states and 1592 transitions. Second operand 4 states. [2020-10-14 09:17:04,224 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2020-10-14 09:17:05,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:17:05,036 INFO L93 Difference]: Finished difference Result 2741 states and 4282 transitions. [2020-10-14 09:17:05,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 09:17:05,037 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 67 [2020-10-14 09:17:05,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:17:05,047 INFO L225 Difference]: With dead ends: 2741 [2020-10-14 09:17:05,048 INFO L226 Difference]: Without dead ends: 1755 [2020-10-14 09:17:05,051 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 09:17:05,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1755 states. [2020-10-14 09:17:05,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1755 to 1753. [2020-10-14 09:17:05,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1753 states. [2020-10-14 09:17:05,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1753 states to 1753 states and 2712 transitions. [2020-10-14 09:17:05,193 INFO L78 Accepts]: Start accepts. Automaton has 1753 states and 2712 transitions. Word has length 67 [2020-10-14 09:17:05,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:17:05,194 INFO L479 AbstractCegarLoop]: Abstraction has 1753 states and 2712 transitions. [2020-10-14 09:17:05,194 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:17:05,194 INFO L276 IsEmpty]: Start isEmpty. Operand 1753 states and 2712 transitions. [2020-10-14 09:17:05,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-14 09:17:05,195 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:17:05,195 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:17:05,195 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-14 09:17:05,196 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:17:05,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:17:05,196 INFO L82 PathProgramCache]: Analyzing trace with hash 1043573223, now seen corresponding path program 1 times [2020-10-14 09:17:05,196 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:17:05,197 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1349067167] [2020-10-14 09:17:05,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:17:05,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:17:05,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:17:05,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:17:06,479 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:17:06,480 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-14 09:17:06,480 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 09:17:06,480 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1248 [2020-10-14 09:17:06,481 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:17:06,481 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:17:06,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-14 09:17:06,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-14 09:17:06,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-14 09:17:06,482 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:17:06,701 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-14 09:17:06,702 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:17:06,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:17:06,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:17:06,714 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:17:06,714 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:17:06,714 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:17:06,714 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-14 09:17:06,715 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:17:06,715 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:17:06,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:17:06,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:17:06,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:17:06,715 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:17:06,732 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:17:06,732 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1349067167] [2020-10-14 09:17:06,733 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:17:06,734 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-14 09:17:06,734 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469516047] [2020-10-14 09:17:06,735 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-14 09:17:06,735 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:17:06,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-14 09:17:06,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-14 09:17:06,736 INFO L87 Difference]: Start difference. First operand 1753 states and 2712 transitions. Second operand 8 states. [2020-10-14 09:17:06,984 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 155 [2020-10-14 09:17:08,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:17:08,100 INFO L93 Difference]: Finished difference Result 12037 states and 18750 transitions. [2020-10-14 09:17:08,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-14 09:17:08,101 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 68 [2020-10-14 09:17:08,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:17:08,177 INFO L225 Difference]: With dead ends: 12037 [2020-10-14 09:17:08,177 INFO L226 Difference]: Without dead ends: 10323 [2020-10-14 09:17:08,193 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2020-10-14 09:17:08,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10323 states. [2020-10-14 09:17:08,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10323 to 3465. [2020-10-14 09:17:08,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3465 states. [2020-10-14 09:17:08,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3465 states to 3465 states and 5320 transitions. [2020-10-14 09:17:08,721 INFO L78 Accepts]: Start accepts. Automaton has 3465 states and 5320 transitions. Word has length 68 [2020-10-14 09:17:08,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:17:08,723 INFO L479 AbstractCegarLoop]: Abstraction has 3465 states and 5320 transitions. [2020-10-14 09:17:08,723 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-14 09:17:08,723 INFO L276 IsEmpty]: Start isEmpty. Operand 3465 states and 5320 transitions. [2020-10-14 09:17:08,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-14 09:17:08,724 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:17:08,725 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:17:08,725 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-14 09:17:08,725 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:17:08,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:17:08,726 INFO L82 PathProgramCache]: Analyzing trace with hash -2027501168, now seen corresponding path program 1 times [2020-10-14 09:17:08,726 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:17:08,728 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1187273890] [2020-10-14 09:17:08,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:17:08,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:17:08,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:17:09,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:17:09,761 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:17:09,762 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-14 09:17:09,762 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 09:17:09,763 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 998 [2020-10-14 09:17:09,763 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:17:09,763 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:17:09,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 09:17:09,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 71 [2020-10-14 09:17:09,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-14 09:17:09,765 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:17:10,102 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-14 09:17:10,106 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:17:10,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:17:10,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:17:10,153 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:17:10,153 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:17:10,154 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:17:10,154 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 37 [2020-10-14 09:17:10,155 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:17:10,155 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:17:10,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:17:10,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:17:10,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:17:10,156 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:17:10,180 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:17:10,181 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1187273890] [2020-10-14 09:17:10,181 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:17:10,182 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-14 09:17:10,182 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074741606] [2020-10-14 09:17:10,183 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 09:17:10,183 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:17:10,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 09:17:10,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-14 09:17:10,184 INFO L87 Difference]: Start difference. First operand 3465 states and 5320 transitions. Second operand 5 states. [2020-10-14 09:17:11,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:17:11,579 INFO L93 Difference]: Finished difference Result 7019 states and 10729 transitions. [2020-10-14 09:17:11,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-14 09:17:11,579 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 69 [2020-10-14 09:17:11,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:17:11,625 INFO L225 Difference]: With dead ends: 7019 [2020-10-14 09:17:11,626 INFO L226 Difference]: Without dead ends: 7017 [2020-10-14 09:17:11,631 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-14 09:17:11,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7017 states. [2020-10-14 09:17:12,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7017 to 3593. [2020-10-14 09:17:12,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3593 states. [2020-10-14 09:17:12,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3593 states to 3593 states and 5448 transitions. [2020-10-14 09:17:12,169 INFO L78 Accepts]: Start accepts. Automaton has 3593 states and 5448 transitions. Word has length 69 [2020-10-14 09:17:12,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:17:12,170 INFO L479 AbstractCegarLoop]: Abstraction has 3593 states and 5448 transitions. [2020-10-14 09:17:12,170 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 09:17:12,170 INFO L276 IsEmpty]: Start isEmpty. Operand 3593 states and 5448 transitions. [2020-10-14 09:17:12,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-14 09:17:12,173 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:17:12,173 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:17:12,173 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-14 09:17:12,173 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:17:12,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:17:12,174 INFO L82 PathProgramCache]: Analyzing trace with hash 1581593014, now seen corresponding path program 1 times [2020-10-14 09:17:12,174 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:17:12,175 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [500755170] [2020-10-14 09:17:12,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:17:12,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:17:12,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:17:12,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:17:12,872 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:17:12,873 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-14 09:17:12,873 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 09:17:12,873 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 668 [2020-10-14 09:17:12,874 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:17:12,874 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:17:12,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:17:12,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 09:17:12,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-14 09:17:12,875 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:17:13,125 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-14 09:17:13,126 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:17:13,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:17:13,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:17:13,147 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:17:13,148 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:17:13,148 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:17:13,148 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-14 09:17:13,149 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:17:13,149 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:17:13,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:17:13,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:17:13,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:17:13,150 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:17:13,171 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:17:13,176 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [500755170] [2020-10-14 09:17:13,176 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:17:13,176 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:17:13,177 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69799735] [2020-10-14 09:17:13,177 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:17:13,177 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:17:13,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:17:13,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:17:13,178 INFO L87 Difference]: Start difference. First operand 3593 states and 5448 transitions. Second operand 4 states. [2020-10-14 09:17:13,338 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 147 [2020-10-14 09:17:14,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:17:14,203 INFO L93 Difference]: Finished difference Result 8879 states and 13484 transitions. [2020-10-14 09:17:14,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 09:17:14,203 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 70 [2020-10-14 09:17:14,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:17:14,245 INFO L225 Difference]: With dead ends: 8879 [2020-10-14 09:17:14,246 INFO L226 Difference]: Without dead ends: 5325 [2020-10-14 09:17:14,254 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 09:17:14,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5325 states. [2020-10-14 09:17:14,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5325 to 5323. [2020-10-14 09:17:14,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5323 states. [2020-10-14 09:17:14,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5323 states to 5323 states and 8042 transitions. [2020-10-14 09:17:14,645 INFO L78 Accepts]: Start accepts. Automaton has 5323 states and 8042 transitions. Word has length 70 [2020-10-14 09:17:14,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:17:14,645 INFO L479 AbstractCegarLoop]: Abstraction has 5323 states and 8042 transitions. [2020-10-14 09:17:14,645 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:17:14,645 INFO L276 IsEmpty]: Start isEmpty. Operand 5323 states and 8042 transitions. [2020-10-14 09:17:14,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-10-14 09:17:14,650 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:17:14,651 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:17:14,651 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-14 09:17:14,651 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:17:14,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:17:14,652 INFO L82 PathProgramCache]: Analyzing trace with hash -2069971047, now seen corresponding path program 1 times [2020-10-14 09:17:14,652 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:17:14,653 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2100079375] [2020-10-14 09:17:14,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:17:14,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:17:14,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:17:14,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:17:15,629 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:17:15,630 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-14 09:17:15,630 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 09:17:15,630 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 943 [2020-10-14 09:17:15,631 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:17:15,631 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:17:15,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 09:17:15,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 09:17:15,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 85 [2020-10-14 09:17:15,632 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:17:16,021 WARN L193 SmtUtils]: Spent 262.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-14 09:17:16,021 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:17:16,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:17:16,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:17:16,033 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:17:16,034 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:17:16,034 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:17:16,034 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-14 09:17:16,034 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:17:16,034 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:17:16,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:17:16,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:17:16,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:17:16,035 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:17:16,070 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-14 09:17:16,070 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2100079375] [2020-10-14 09:17:16,070 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 09:17:16,071 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-14 09:17:16,071 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701697734] [2020-10-14 09:17:16,071 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 09:17:16,072 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:17:16,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 09:17:16,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-14 09:17:16,073 INFO L87 Difference]: Start difference. First operand 5323 states and 8042 transitions. Second operand 5 states. [2020-10-14 09:17:16,295 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 153 [2020-10-14 09:17:17,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:17:17,406 INFO L93 Difference]: Finished difference Result 12305 states and 18669 transitions. [2020-10-14 09:17:17,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-14 09:17:17,407 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 95 [2020-10-14 09:17:17,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:17:17,430 INFO L225 Difference]: With dead ends: 12305 [2020-10-14 09:17:17,431 INFO L226 Difference]: Without dead ends: 8751 [2020-10-14 09:17:17,441 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-14 09:17:17,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8751 states. [2020-10-14 09:17:18,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8751 to 8747. [2020-10-14 09:17:18,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8747 states. [2020-10-14 09:17:18,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8747 states to 8747 states and 13194 transitions. [2020-10-14 09:17:18,114 INFO L78 Accepts]: Start accepts. Automaton has 8747 states and 13194 transitions. Word has length 95 [2020-10-14 09:17:18,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:17:18,114 INFO L479 AbstractCegarLoop]: Abstraction has 8747 states and 13194 transitions. [2020-10-14 09:17:18,114 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 09:17:18,114 INFO L276 IsEmpty]: Start isEmpty. Operand 8747 states and 13194 transitions. [2020-10-14 09:17:18,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-10-14 09:17:18,119 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:17:18,119 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:17:18,120 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-14 09:17:18,120 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:17:18,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:17:18,120 INFO L82 PathProgramCache]: Analyzing trace with hash 728687453, now seen corresponding path program 1 times [2020-10-14 09:17:18,120 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:17:18,121 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1951087223] [2020-10-14 09:17:18,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:17:18,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:17:18,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:17:18,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:17:18,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:17:18,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:17:19,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:17:23,168 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:17:23,168 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-10-14 09:17:23,168 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 09:17:23,169 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-14 09:17:23,169 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:17:23,169 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:17:23,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:17:23,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 47 [2020-10-14 09:17:23,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-14 09:17:23,170 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:17:23,345 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-14 09:17:23,346 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:17:23,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:17:23,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:17:23,358 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:17:23,359 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:17:23,359 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:17:23,359 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-14 09:17:23,360 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:17:23,360 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:17:23,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:17:23,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:17:23,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:17:23,361 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:17:23,381 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:17:23,381 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1951087223] [2020-10-14 09:17:23,381 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:17:23,382 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:17:23,382 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705030322] [2020-10-14 09:17:23,382 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:17:23,382 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:17:23,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:17:23,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:17:23,383 INFO L87 Difference]: Start difference. First operand 8747 states and 13194 transitions. Second operand 4 states. [2020-10-14 09:17:23,553 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2020-10-14 09:17:24,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:17:24,697 INFO L93 Difference]: Finished difference Result 25647 states and 38668 transitions. [2020-10-14 09:17:24,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 09:17:24,697 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 96 [2020-10-14 09:17:24,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:17:24,744 INFO L225 Difference]: With dead ends: 25647 [2020-10-14 09:17:24,744 INFO L226 Difference]: Without dead ends: 16941 [2020-10-14 09:17:24,767 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 09:17:24,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16941 states. [2020-10-14 09:17:26,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16941 to 16939. [2020-10-14 09:17:26,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16939 states. [2020-10-14 09:17:26,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16939 states to 16939 states and 25354 transitions. [2020-10-14 09:17:26,184 INFO L78 Accepts]: Start accepts. Automaton has 16939 states and 25354 transitions. Word has length 96 [2020-10-14 09:17:26,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:17:26,185 INFO L479 AbstractCegarLoop]: Abstraction has 16939 states and 25354 transitions. [2020-10-14 09:17:26,185 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:17:26,185 INFO L276 IsEmpty]: Start isEmpty. Operand 16939 states and 25354 transitions. [2020-10-14 09:17:26,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-10-14 09:17:26,192 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:17:26,192 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:17:26,192 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-14 09:17:26,193 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:17:26,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:17:26,193 INFO L82 PathProgramCache]: Analyzing trace with hash -771209827, now seen corresponding path program 1 times [2020-10-14 09:17:26,193 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:17:26,193 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [808974068] [2020-10-14 09:17:26,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:17:26,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:17:26,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:17:26,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:17:26,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:17:26,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:17:27,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:17:31,098 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:17:31,099 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-10-14 09:17:31,099 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 09:17:31,099 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4877 [2020-10-14 09:17:31,099 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:17:31,099 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:17:31,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:17:31,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 56 [2020-10-14 09:17:31,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-14 09:17:31,100 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:17:31,302 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-14 09:17:31,303 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:17:31,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:17:31,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:17:31,321 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:17:31,321 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:17:31,322 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:17:31,322 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-14 09:17:31,323 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:17:31,323 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:17:31,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:17:31,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:17:31,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:17:31,324 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:17:31,358 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:17:31,359 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [808974068] [2020-10-14 09:17:31,359 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:17:31,359 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:17:31,360 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747706863] [2020-10-14 09:17:31,360 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:17:31,360 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:17:31,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:17:31,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:17:31,361 INFO L87 Difference]: Start difference. First operand 16939 states and 25354 transitions. Second operand 4 states. [2020-10-14 09:17:31,610 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2020-10-14 09:17:34,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:17:34,196 INFO L93 Difference]: Finished difference Result 48975 states and 73100 transitions. [2020-10-14 09:17:34,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 09:17:34,196 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 96 [2020-10-14 09:17:34,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:17:34,281 INFO L225 Difference]: With dead ends: 48975 [2020-10-14 09:17:34,281 INFO L226 Difference]: Without dead ends: 32077 [2020-10-14 09:17:34,322 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 09:17:34,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32077 states. [2020-10-14 09:17:36,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32077 to 32075. [2020-10-14 09:17:36,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32075 states. [2020-10-14 09:17:36,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32075 states to 32075 states and 47466 transitions. [2020-10-14 09:17:36,203 INFO L78 Accepts]: Start accepts. Automaton has 32075 states and 47466 transitions. Word has length 96 [2020-10-14 09:17:36,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:17:36,203 INFO L479 AbstractCegarLoop]: Abstraction has 32075 states and 47466 transitions. [2020-10-14 09:17:36,203 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:17:36,203 INFO L276 IsEmpty]: Start isEmpty. Operand 32075 states and 47466 transitions. [2020-10-14 09:17:36,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-10-14 09:17:36,215 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:17:36,215 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:17:36,215 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-14 09:17:36,215 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:17:36,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:17:36,216 INFO L82 PathProgramCache]: Analyzing trace with hash 2045306620, now seen corresponding path program 1 times [2020-10-14 09:17:36,216 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:17:36,216 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1681637403] [2020-10-14 09:17:36,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:17:36,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:17:36,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:17:36,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:17:36,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:17:36,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:17:37,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:17:40,542 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:17:40,543 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-10-14 09:17:40,543 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 09:17:40,543 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4302 [2020-10-14 09:17:40,543 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:17:40,544 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:17:40,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:17:40,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 61 [2020-10-14 09:17:40,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-14 09:17:40,545 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:17:40,725 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-14 09:17:40,726 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:17:40,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:17:40,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:17:40,737 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:17:40,738 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:17:40,738 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:17:40,738 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-14 09:17:40,738 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:17:40,739 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:17:40,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:17:40,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:17:40,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:17:40,740 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:17:40,767 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:17:40,770 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1681637403] [2020-10-14 09:17:40,771 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:17:40,771 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:17:40,771 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710022875] [2020-10-14 09:17:40,772 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:17:40,775 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:17:40,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:17:40,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:17:40,776 INFO L87 Difference]: Start difference. First operand 32075 states and 47466 transitions. Second operand 4 states. [2020-10-14 09:17:40,988 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2020-10-14 09:17:45,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:17:45,216 INFO L93 Difference]: Finished difference Result 92623 states and 136556 transitions. [2020-10-14 09:17:45,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 09:17:45,217 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 96 [2020-10-14 09:17:45,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:17:45,306 INFO L225 Difference]: With dead ends: 92623 [2020-10-14 09:17:45,307 INFO L226 Difference]: Without dead ends: 60589 [2020-10-14 09:17:45,369 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 09:17:45,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60589 states. [2020-10-14 09:17:48,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60589 to 60587. [2020-10-14 09:17:48,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60587 states. [2020-10-14 09:17:48,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60587 states to 60587 states and 88490 transitions. [2020-10-14 09:17:48,222 INFO L78 Accepts]: Start accepts. Automaton has 60587 states and 88490 transitions. Word has length 96 [2020-10-14 09:17:48,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:17:48,223 INFO L479 AbstractCegarLoop]: Abstraction has 60587 states and 88490 transitions. [2020-10-14 09:17:48,223 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:17:48,223 INFO L276 IsEmpty]: Start isEmpty. Operand 60587 states and 88490 transitions. [2020-10-14 09:17:48,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-10-14 09:17:48,237 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:17:48,237 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:17:48,237 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-14 09:17:48,238 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:17:48,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:17:48,238 INFO L82 PathProgramCache]: Analyzing trace with hash 1558470789, now seen corresponding path program 1 times [2020-10-14 09:17:48,238 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:17:48,238 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [24602324] [2020-10-14 09:17:48,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:17:48,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:17:48,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:17:48,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:17:48,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:17:48,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:17:48,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:17:52,123 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:17:52,123 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-10-14 09:17:52,124 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 09:17:52,124 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3861 [2020-10-14 09:17:52,124 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:17:52,124 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:17:52,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:17:52,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 66 [2020-10-14 09:17:52,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-14 09:17:52,124 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:17:52,281 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-14 09:17:52,281 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:17:52,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:17:52,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:17:52,293 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:17:52,293 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:17:52,293 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:17:52,293 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-14 09:17:52,294 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:17:52,294 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:17:52,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:17:52,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:17:52,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:17:52,295 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:17:52,311 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:17:52,312 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [24602324] [2020-10-14 09:17:52,312 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:17:52,312 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:17:52,312 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537903503] [2020-10-14 09:17:52,313 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:17:52,313 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:17:52,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:17:52,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:17:52,314 INFO L87 Difference]: Start difference. First operand 60587 states and 88490 transitions. Second operand 4 states. [2020-10-14 09:17:52,485 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2020-10-14 09:17:58,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:17:58,834 INFO L93 Difference]: Finished difference Result 174639 states and 253868 transitions. [2020-10-14 09:17:58,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 09:17:58,834 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 96 [2020-10-14 09:17:58,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:17:58,976 INFO L225 Difference]: With dead ends: 174639 [2020-10-14 09:17:58,976 INFO L226 Difference]: Without dead ends: 114093 [2020-10-14 09:17:59,036 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 09:17:59,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114093 states. [2020-10-14 09:18:06,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114093 to 114091. [2020-10-14 09:18:06,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114091 states. [2020-10-14 09:18:06,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114091 states to 114091 states and 164138 transitions. [2020-10-14 09:18:06,488 INFO L78 Accepts]: Start accepts. Automaton has 114091 states and 164138 transitions. Word has length 96 [2020-10-14 09:18:06,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:18:06,488 INFO L479 AbstractCegarLoop]: Abstraction has 114091 states and 164138 transitions. [2020-10-14 09:18:06,489 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:18:06,493 INFO L276 IsEmpty]: Start isEmpty. Operand 114091 states and 164138 transitions. [2020-10-14 09:18:06,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-10-14 09:18:06,513 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:18:06,513 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:18:06,513 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-14 09:18:06,514 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:18:06,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:18:06,514 INFO L82 PathProgramCache]: Analyzing trace with hash 122974824, now seen corresponding path program 1 times [2020-10-14 09:18:06,514 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:18:06,514 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1481334138] [2020-10-14 09:18:06,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:18:06,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:18:06,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:18:06,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:18:06,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:18:07,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:18:07,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:18:10,541 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:18:10,541 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-10-14 09:18:10,541 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 09:18:10,542 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4003 [2020-10-14 09:18:10,542 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:18:10,542 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:18:10,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:18:10,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 51 [2020-10-14 09:18:10,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-14 09:18:10,542 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:18:10,707 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-14 09:18:10,708 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:18:10,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:18:10,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:18:10,720 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:18:10,720 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:18:10,720 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:18:10,720 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-14 09:18:10,721 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:18:10,721 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:18:10,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:18:10,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:18:10,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:18:10,722 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:18:10,738 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:18:10,738 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1481334138] [2020-10-14 09:18:10,739 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:18:10,739 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:18:10,739 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844083869] [2020-10-14 09:18:10,739 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:18:10,740 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:18:10,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:18:10,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:18:10,740 INFO L87 Difference]: Start difference. First operand 114091 states and 164138 transitions. Second operand 4 states. [2020-10-14 09:18:10,911 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2020-10-14 09:18:22,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:18:22,420 INFO L93 Difference]: Finished difference Result 328111 states and 469292 transitions. [2020-10-14 09:18:22,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 09:18:22,420 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 96 [2020-10-14 09:18:22,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:18:22,700 INFO L225 Difference]: With dead ends: 328111 [2020-10-14 09:18:22,700 INFO L226 Difference]: Without dead ends: 214061 [2020-10-14 09:18:22,800 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 09:18:22,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214061 states. [2020-10-14 09:18:36,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214061 to 214059. [2020-10-14 09:18:36,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214059 states. [2020-10-14 09:18:36,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214059 states to 214059 states and 302634 transitions. [2020-10-14 09:18:36,950 INFO L78 Accepts]: Start accepts. Automaton has 214059 states and 302634 transitions. Word has length 96 [2020-10-14 09:18:36,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:18:36,950 INFO L479 AbstractCegarLoop]: Abstraction has 214059 states and 302634 transitions. [2020-10-14 09:18:36,950 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:18:36,951 INFO L276 IsEmpty]: Start isEmpty. Operand 214059 states and 302634 transitions. [2020-10-14 09:18:36,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-10-14 09:18:36,981 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:18:36,981 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:18:36,981 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-14 09:18:36,982 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:18:36,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:18:36,982 INFO L82 PathProgramCache]: Analyzing trace with hash -146038159, now seen corresponding path program 1 times [2020-10-14 09:18:36,982 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:18:36,982 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [238448515] [2020-10-14 09:18:36,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:18:37,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:18:37,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:18:37,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:18:37,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:18:37,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:18:37,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:18:38,861 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:18:38,862 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 104 [2020-10-14 09:18:38,862 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 09:18:38,862 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1860 [2020-10-14 09:18:38,862 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:18:38,862 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:18:38,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 09:18:38,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-14 09:18:38,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-14 09:18:38,863 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:18:39,036 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-14 09:18:39,037 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:18:39,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:18:39,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:18:39,048 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:18:39,048 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:18:39,048 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:18:39,048 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-14 09:18:39,048 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:18:39,048 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:18:39,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:18:39,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:18:39,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:18:39,049 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:18:39,061 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:18:39,061 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [238448515] [2020-10-14 09:18:39,061 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 09:18:39,062 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-14 09:18:39,062 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290185826] [2020-10-14 09:18:39,062 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 09:18:39,062 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:18:39,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 09:18:39,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-14 09:18:39,063 INFO L87 Difference]: Start difference. First operand 214059 states and 302634 transitions. Second operand 6 states. [2020-10-14 09:18:39,233 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2020-10-14 09:19:45,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:19:45,729 INFO L93 Difference]: Finished difference Result 1295099 states and 1821490 transitions. [2020-10-14 09:19:45,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-14 09:19:45,730 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 98 [2020-10-14 09:19:45,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:19:47,482 INFO L225 Difference]: With dead ends: 1295099 [2020-10-14 09:19:47,482 INFO L226 Difference]: Without dead ends: 1081081 [2020-10-14 09:19:47,777 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-10-14 09:19:48,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1081081 states.