/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.6.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-14 08:52:25,361 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-14 08:52:25,363 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-14 08:52:25,392 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-14 08:52:25,393 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-14 08:52:25,394 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-14 08:52:25,395 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-14 08:52:25,397 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-14 08:52:25,398 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-14 08:52:25,399 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-14 08:52:25,400 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-14 08:52:25,401 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-14 08:52:25,401 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-14 08:52:25,402 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-14 08:52:25,403 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-14 08:52:25,404 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-14 08:52:25,405 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-14 08:52:25,406 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-14 08:52:25,407 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-14 08:52:25,409 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-14 08:52:25,410 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-14 08:52:25,411 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-14 08:52:25,412 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-14 08:52:25,413 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-14 08:52:25,415 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-14 08:52:25,416 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-14 08:52:25,416 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-14 08:52:25,417 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-14 08:52:25,417 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-14 08:52:25,418 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-14 08:52:25,418 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-14 08:52:25,419 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-14 08:52:25,419 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-14 08:52:25,420 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-14 08:52:25,421 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-14 08:52:25,421 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-14 08:52:25,422 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-14 08:52:25,422 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-14 08:52:25,422 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-14 08:52:25,423 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-14 08:52:25,424 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-14 08:52:25,424 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 08:52:25,446 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-14 08:52:25,447 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-14 08:52:25,448 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-14 08:52:25,448 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-14 08:52:25,448 INFO L138 SettingsManager]: * Use SBE=true [2020-10-14 08:52:25,448 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-14 08:52:25,449 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-14 08:52:25,449 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-14 08:52:25,449 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-14 08:52:25,449 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-14 08:52:25,449 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-14 08:52:25,450 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-14 08:52:25,450 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-14 08:52:25,450 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-14 08:52:25,450 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-14 08:52:25,450 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-14 08:52:25,451 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-14 08:52:25,451 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-14 08:52:25,451 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-14 08:52:25,451 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-14 08:52:25,451 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-14 08:52:25,452 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 08:52:25,452 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-14 08:52:25,452 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-14 08:52:25,452 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-14 08:52:25,452 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-14 08:52:25,453 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-14 08:52:25,453 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-14 08:52:25,453 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-14 08:52:25,453 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 08:52:25,760 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-14 08:52:25,773 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-14 08:52:25,776 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-14 08:52:25,778 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-14 08:52:25,779 INFO L275 PluginConnector]: CDTParser initialized [2020-10-14 08:52:25,779 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.6.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-14 08:52:25,853 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/53d3edc8a/a2e7554eac5548d69fe7c9b45a031dfa/FLAG08d1898c7 [2020-10-14 08:52:26,284 INFO L306 CDTParser]: Found 1 translation units. [2020-10-14 08:52:26,285 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.6.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-14 08:52:26,300 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/53d3edc8a/a2e7554eac5548d69fe7c9b45a031dfa/FLAG08d1898c7 [2020-10-14 08:52:26,612 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/53d3edc8a/a2e7554eac5548d69fe7c9b45a031dfa [2020-10-14 08:52:26,623 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-14 08:52:26,625 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-14 08:52:26,628 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-14 08:52:26,628 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-14 08:52:26,632 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-14 08:52:26,633 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 08:52:26" (1/1) ... [2020-10-14 08:52:26,637 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2a00533e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 08:52:26, skipping insertion in model container [2020-10-14 08:52:26,637 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 08:52:26" (1/1) ... [2020-10-14 08:52:26,644 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-14 08:52:26,686 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-14 08:52:26,950 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 08:52:26,974 INFO L203 MainTranslator]: Completed pre-run [2020-10-14 08:52:27,208 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 08:52:27,230 INFO L208 MainTranslator]: Completed translation [2020-10-14 08:52:27,231 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 08:52:27 WrapperNode [2020-10-14 08:52:27,231 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-14 08:52:27,232 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-14 08:52:27,232 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-14 08:52:27,232 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-14 08:52:27,246 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 08:52:27" (1/1) ... [2020-10-14 08:52:27,246 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 08:52:27" (1/1) ... [2020-10-14 08:52:27,258 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 08:52:27" (1/1) ... [2020-10-14 08:52:27,258 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 08:52:27" (1/1) ... [2020-10-14 08:52:27,276 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 08:52:27" (1/1) ... [2020-10-14 08:52:27,300 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 08:52:27" (1/1) ... [2020-10-14 08:52:27,308 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 08:52:27" (1/1) ... [2020-10-14 08:52:27,313 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-14 08:52:27,313 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-14 08:52:27,313 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-14 08:52:27,314 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-14 08:52:27,315 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 08:52:27" (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 08:52:27,370 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-14 08:52:27,370 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-14 08:52:27,370 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-14 08:52:27,370 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-14 08:52:27,371 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-14 08:52:27,371 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-14 08:52:27,371 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-14 08:52:27,372 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-10-14 08:52:27,372 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-14 08:52:27,372 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-14 08:52:27,372 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-14 08:52:27,373 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-14 08:52:27,373 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-14 08:52:27,373 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-14 08:52:27,373 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-14 08:52:27,374 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-14 08:52:27,374 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-14 08:52:27,374 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-10-14 08:52:27,375 INFO L130 BoogieDeclarations]: Found specification of procedure node6 [2020-10-14 08:52:27,375 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-14 08:52:27,375 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-14 08:52:27,376 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-14 08:52:27,376 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-14 08:52:27,376 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-14 08:52:28,079 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-14 08:52:28,081 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-14 08:52:28,092 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 08:52:28 BoogieIcfgContainer [2020-10-14 08:52:28,092 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-14 08:52:28,094 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-14 08:52:28,095 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-14 08:52:28,098 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-14 08:52:28,098 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 08:52:26" (1/3) ... [2020-10-14 08:52:28,100 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73ddf4bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 08:52:28, skipping insertion in model container [2020-10-14 08:52:28,100 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 08:52:27" (2/3) ... [2020-10-14 08:52:28,101 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73ddf4bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 08:52:28, skipping insertion in model container [2020-10-14 08:52:28,101 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 08:52:28" (3/3) ... [2020-10-14 08:52:28,103 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_lcr.6.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-14 08:52:28,115 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-14 08:52:28,128 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-14 08:52:28,143 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-14 08:52:28,177 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-14 08:52:28,177 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-14 08:52:28,177 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-14 08:52:28,177 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-14 08:52:28,178 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-14 08:52:28,178 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-14 08:52:28,178 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-14 08:52:28,178 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-14 08:52:28,208 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states. [2020-10-14 08:52:28,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-14 08:52:28,226 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:52:28,227 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, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 08:52:28,228 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:52:28,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:52:28,235 INFO L82 PathProgramCache]: Analyzing trace with hash -2061210715, now seen corresponding path program 1 times [2020-10-14 08:52:28,245 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:52:28,245 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1829235029] [2020-10-14 08:52:28,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:52:28,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:52:28,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:52:28,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:52:28,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:52:29,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:52:29,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:52:31,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:52:31,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:52:33,562 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:52:33,562 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-14 08:52:33,563 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 08:52:33,563 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-14 08:52:33,566 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:52:33,567 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:52:33,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 08:52:33,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-14 08:52:33,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-14 08:52:33,568 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-14 08:52:33,921 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-10-14 08:52:33,924 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:52:33,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:52:33,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:52:33,954 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:52:33,954 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:52:33,954 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:52:33,955 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-14 08:52:33,955 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:52:33,956 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:52:33,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:52:33,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:52:33,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:52:33,957 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-14 08:52:33,993 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 08:52:33,994 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1829235029] [2020-10-14 08:52:33,996 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:52:33,996 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 08:52:33,997 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118018250] [2020-10-14 08:52:34,004 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 08:52:34,005 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:52:34,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 08:52:34,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 08:52:34,021 INFO L87 Difference]: Start difference. First operand 123 states. Second operand 4 states. [2020-10-14 08:52:34,272 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 152 [2020-10-14 08:52:35,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:52:35,028 INFO L93 Difference]: Finished difference Result 267 states and 429 transitions. [2020-10-14 08:52:35,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 08:52:35,030 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 77 [2020-10-14 08:52:35,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:52:35,044 INFO L225 Difference]: With dead ends: 267 [2020-10-14 08:52:35,044 INFO L226 Difference]: Without dead ends: 183 [2020-10-14 08:52:35,048 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 08:52:35,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2020-10-14 08:52:35,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 181. [2020-10-14 08:52:35,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2020-10-14 08:52:35,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 260 transitions. [2020-10-14 08:52:35,108 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 260 transitions. Word has length 77 [2020-10-14 08:52:35,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:52:35,109 INFO L479 AbstractCegarLoop]: Abstraction has 181 states and 260 transitions. [2020-10-14 08:52:35,109 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 08:52:35,109 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 260 transitions. [2020-10-14 08:52:35,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-14 08:52:35,112 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:52:35,112 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, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 08:52:35,113 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-14 08:52:35,113 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:52:35,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:52:35,113 INFO L82 PathProgramCache]: Analyzing trace with hash -1851960976, now seen corresponding path program 1 times [2020-10-14 08:52:35,114 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:52:35,114 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1564801642] [2020-10-14 08:52:35,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:52:35,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:52:35,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:52:35,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:52:35,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:52:35,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:52:35,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:52:36,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:52:38,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:52:39,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:52:40,161 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:52:40,161 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-14 08:52:40,161 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-14 08:52:40,161 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-14 08:52:40,162 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:52:40,162 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:52:40,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 08:52:40,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 36 [2020-10-14 08:52:40,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-14 08:52:40,171 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 9 [2020-10-14 08:52:40,397 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-10-14 08:52:40,399 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:52:40,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:52:40,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:52:40,420 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:52:40,420 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:52:40,421 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:52:40,421 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-14 08:52:40,421 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:52:40,422 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:52:40,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:52:40,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:52:40,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:52:40,423 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 08:52:40,456 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 08:52:40,457 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1564801642] [2020-10-14 08:52:40,457 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:52:40,457 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 08:52:40,458 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975386323] [2020-10-14 08:52:40,460 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 08:52:40,460 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:52:40,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 08:52:40,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 08:52:40,461 INFO L87 Difference]: Start difference. First operand 181 states and 260 transitions. Second operand 4 states. [2020-10-14 08:52:40,696 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 152 [2020-10-14 08:52:41,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:52:41,171 INFO L93 Difference]: Finished difference Result 433 states and 660 transitions. [2020-10-14 08:52:41,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 08:52:41,171 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 78 [2020-10-14 08:52:41,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:52:41,175 INFO L225 Difference]: With dead ends: 433 [2020-10-14 08:52:41,175 INFO L226 Difference]: Without dead ends: 299 [2020-10-14 08:52:41,180 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 08:52:41,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2020-10-14 08:52:41,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 297. [2020-10-14 08:52:41,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 297 states. [2020-10-14 08:52:41,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 444 transitions. [2020-10-14 08:52:41,230 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 444 transitions. Word has length 78 [2020-10-14 08:52:41,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:52:41,232 INFO L479 AbstractCegarLoop]: Abstraction has 297 states and 444 transitions. [2020-10-14 08:52:41,233 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 08:52:41,233 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 444 transitions. [2020-10-14 08:52:41,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-14 08:52:41,237 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:52:41,238 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 08:52:41,240 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-14 08:52:41,240 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:52:41,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:52:41,240 INFO L82 PathProgramCache]: Analyzing trace with hash -2072061141, now seen corresponding path program 1 times [2020-10-14 08:52:41,241 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:52:41,241 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1688390430] [2020-10-14 08:52:41,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:52:41,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:52:41,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:52:41,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:52:41,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:52:41,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:52:41,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:52:41,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:52:44,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:52:44,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:52:44,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:52:45,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:52:46,274 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:52:46,274 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-14 08:52:46,274 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-14 08:52:46,275 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-14 08:52:46,275 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:52:46,275 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:52:46,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 08:52:46,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 32 [2020-10-14 08:52:46,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-14 08:52:46,276 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 08:52:46,461 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-10-14 08:52:46,462 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:52:46,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:52:46,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:52:46,477 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:52:46,477 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:52:46,478 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:52:46,478 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-14 08:52:46,478 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:52:46,478 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:52:46,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:52:46,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:52:46,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:52:46,479 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 08:52:46,498 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 08:52:46,499 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1688390430] [2020-10-14 08:52:46,499 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:52:46,499 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 08:52:46,500 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2998730] [2020-10-14 08:52:46,501 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 08:52:46,501 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:52:46,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 08:52:46,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 08:52:46,502 INFO L87 Difference]: Start difference. First operand 297 states and 444 transitions. Second operand 4 states. [2020-10-14 08:52:46,692 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 152 [2020-10-14 08:52:47,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:52:47,205 INFO L93 Difference]: Finished difference Result 765 states and 1186 transitions. [2020-10-14 08:52:47,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 08:52:47,208 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 79 [2020-10-14 08:52:47,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:52:47,213 INFO L225 Difference]: With dead ends: 765 [2020-10-14 08:52:47,213 INFO L226 Difference]: Without dead ends: 515 [2020-10-14 08:52:47,219 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 08:52:47,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 515 states. [2020-10-14 08:52:47,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 515 to 513. [2020-10-14 08:52:47,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 513 states. [2020-10-14 08:52:47,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 513 states to 513 states and 784 transitions. [2020-10-14 08:52:47,272 INFO L78 Accepts]: Start accepts. Automaton has 513 states and 784 transitions. Word has length 79 [2020-10-14 08:52:47,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:52:47,274 INFO L479 AbstractCegarLoop]: Abstraction has 513 states and 784 transitions. [2020-10-14 08:52:47,274 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 08:52:47,274 INFO L276 IsEmpty]: Start isEmpty. Operand 513 states and 784 transitions. [2020-10-14 08:52:47,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-14 08:52:47,278 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:52:47,278 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 08:52:47,279 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-14 08:52:47,279 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:52:47,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:52:47,279 INFO L82 PathProgramCache]: Analyzing trace with hash -226197500, now seen corresponding path program 1 times [2020-10-14 08:52:47,280 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:52:47,281 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [620606107] [2020-10-14 08:52:47,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:52:47,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:52:47,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:52:47,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:52:47,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:52:47,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:52:47,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:52:49,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:52:49,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:52:49,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:52:49,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:52:52,315 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:52:52,315 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-14 08:52:52,315 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-14 08:52:52,316 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-14 08:52:52,316 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:52:52,316 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:52:52,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 08:52:52,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-14 08:52:52,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-14 08:52:52,317 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 08:52:52,525 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-10-14 08:52:52,526 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:52:52,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:52:52,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:52:52,539 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:52:52,539 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:52:52,540 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:52:52,540 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-14 08:52:52,540 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:52:52,540 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:52:52,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:52:52,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:52:52,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:52:52,541 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 08:52:52,561 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 08:52:52,561 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [620606107] [2020-10-14 08:52:52,562 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:52:52,562 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 08:52:52,562 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001266592] [2020-10-14 08:52:52,563 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 08:52:52,563 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:52:52,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 08:52:52,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 08:52:52,564 INFO L87 Difference]: Start difference. First operand 513 states and 784 transitions. Second operand 4 states. [2020-10-14 08:52:52,746 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 152 [2020-10-14 08:52:53,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:52:53,546 INFO L93 Difference]: Finished difference Result 1381 states and 2154 transitions. [2020-10-14 08:52:53,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 08:52:53,546 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 80 [2020-10-14 08:52:53,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:52:53,552 INFO L225 Difference]: With dead ends: 1381 [2020-10-14 08:52:53,552 INFO L226 Difference]: Without dead ends: 915 [2020-10-14 08:52:53,554 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 08:52:53,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 915 states. [2020-10-14 08:52:53,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 915 to 913. [2020-10-14 08:52:53,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 913 states. [2020-10-14 08:52:53,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 913 states to 913 states and 1408 transitions. [2020-10-14 08:52:53,610 INFO L78 Accepts]: Start accepts. Automaton has 913 states and 1408 transitions. Word has length 80 [2020-10-14 08:52:53,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:52:53,611 INFO L479 AbstractCegarLoop]: Abstraction has 913 states and 1408 transitions. [2020-10-14 08:52:53,611 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 08:52:53,612 INFO L276 IsEmpty]: Start isEmpty. Operand 913 states and 1408 transitions. [2020-10-14 08:52:53,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-14 08:52:53,613 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:52:53,613 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 08:52:53,613 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-14 08:52:53,614 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:52:53,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:52:53,614 INFO L82 PathProgramCache]: Analyzing trace with hash 1623440399, now seen corresponding path program 1 times [2020-10-14 08:52:53,615 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:52:53,615 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2098924730] [2020-10-14 08:52:53,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:52:53,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:52:53,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:52:53,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:52:53,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:52:53,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:52:53,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:52:54,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:52:54,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:52:57,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:52:57,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:52:57,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:52:57,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:52:57,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:52:58,646 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:52:58,646 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-14 08:52:58,646 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-14 08:52:58,646 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-14 08:52:58,647 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:52:58,647 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:52:58,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 08:52:58,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-14 08:52:58,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-14 08:52:58,648 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:52:58,870 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-10-14 08:52:58,871 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:52:58,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:52:58,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:52:58,889 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:52:58,889 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:52:58,889 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:52:58,889 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-14 08:52:58,890 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:52:58,890 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:52:58,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:52:58,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:52:58,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:52:58,892 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 08:52:58,922 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 08:52:58,922 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2098924730] [2020-10-14 08:52:58,922 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:52:58,923 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 08:52:58,923 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471091503] [2020-10-14 08:52:58,923 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 08:52:58,924 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:52:58,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 08:52:58,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 08:52:58,925 INFO L87 Difference]: Start difference. First operand 913 states and 1408 transitions. Second operand 4 states. [2020-10-14 08:52:59,164 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 152 [2020-10-14 08:52:59,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:52:59,784 INFO L93 Difference]: Finished difference Result 2517 states and 3922 transitions. [2020-10-14 08:52:59,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 08:52:59,785 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 81 [2020-10-14 08:52:59,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:52:59,795 INFO L225 Difference]: With dead ends: 2517 [2020-10-14 08:52:59,795 INFO L226 Difference]: Without dead ends: 1651 [2020-10-14 08:52:59,798 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 08:52:59,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1651 states. [2020-10-14 08:52:59,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1651 to 1649. [2020-10-14 08:52:59,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1649 states. [2020-10-14 08:52:59,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1649 states to 1649 states and 2544 transitions. [2020-10-14 08:52:59,887 INFO L78 Accepts]: Start accepts. Automaton has 1649 states and 2544 transitions. Word has length 81 [2020-10-14 08:52:59,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:52:59,888 INFO L479 AbstractCegarLoop]: Abstraction has 1649 states and 2544 transitions. [2020-10-14 08:52:59,888 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 08:52:59,889 INFO L276 IsEmpty]: Start isEmpty. Operand 1649 states and 2544 transitions. [2020-10-14 08:52:59,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-14 08:52:59,895 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:52:59,895 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 08:52:59,896 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-14 08:52:59,896 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:52:59,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:52:59,896 INFO L82 PathProgramCache]: Analyzing trace with hash -1156599862, now seen corresponding path program 1 times [2020-10-14 08:52:59,897 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:52:59,897 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [214620841] [2020-10-14 08:52:59,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:52:59,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:52:59,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:52:59,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:52:59,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:53:00,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:53:00,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:53:00,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:53:02,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:53:02,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:53:02,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:53:02,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:53:03,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:53:04,920 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:53:04,921 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-14 08:53:04,921 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-14 08:53:04,921 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-14 08:53:04,921 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:53:04,921 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:53:04,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 08:53:04,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-14 08:53:04,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-14 08:53:04,922 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:53:05,227 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-10-14 08:53:05,229 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:53:05,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:53:05,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:53:05,328 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:53:05,329 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:53:05,329 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:53:05,329 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 87 [2020-10-14 08:53:05,330 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:53:05,330 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:53:05,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 08:53:05,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:53:05,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 08:53:05,331 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 08:53:05,369 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 08:53:05,370 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [214620841] [2020-10-14 08:53:05,370 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:53:05,370 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-14 08:53:05,370 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757328060] [2020-10-14 08:53:05,371 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 08:53:05,371 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:53:05,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 08:53:05,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-14 08:53:05,372 INFO L87 Difference]: Start difference. First operand 1649 states and 2544 transitions. Second operand 6 states. [2020-10-14 08:53:05,643 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-14 08:53:06,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:53:06,446 INFO L93 Difference]: Finished difference Result 4837 states and 7506 transitions. [2020-10-14 08:53:06,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-14 08:53:06,446 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 82 [2020-10-14 08:53:06,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:53:06,463 INFO L225 Difference]: With dead ends: 4837 [2020-10-14 08:53:06,463 INFO L226 Difference]: Without dead ends: 3235 [2020-10-14 08:53:06,468 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-10-14 08:53:06,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3235 states. [2020-10-14 08:53:06,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3235 to 3233. [2020-10-14 08:53:06,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3233 states. [2020-10-14 08:53:06,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3233 states to 3233 states and 4992 transitions. [2020-10-14 08:53:06,655 INFO L78 Accepts]: Start accepts. Automaton has 3233 states and 4992 transitions. Word has length 82 [2020-10-14 08:53:06,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:53:06,656 INFO L479 AbstractCegarLoop]: Abstraction has 3233 states and 4992 transitions. [2020-10-14 08:53:06,656 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 08:53:06,656 INFO L276 IsEmpty]: Start isEmpty. Operand 3233 states and 4992 transitions. [2020-10-14 08:53:06,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-14 08:53:06,657 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:53:06,657 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 08:53:06,657 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-14 08:53:06,657 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:53:06,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:53:06,658 INFO L82 PathProgramCache]: Analyzing trace with hash 117268143, now seen corresponding path program 1 times [2020-10-14 08:53:06,658 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:53:06,659 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [835186310] [2020-10-14 08:53:06,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:53:06,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:53:06,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:53:06,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:53:06,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:53:06,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:53:07,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:53:07,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:53:08,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:53:11,686 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:53:11,686 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-14 08:53:11,686 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 08:53:11,686 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-14 08:53:11,686 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:53:11,687 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:53:11,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 08:53:11,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-14 08:53:11,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-14 08:53:11,687 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:53:11,892 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-10-14 08:53:11,893 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:53:11,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:53:11,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:53:11,916 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:53:11,916 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:53:11,916 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:53:11,917 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-14 08:53:11,917 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:53:11,917 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:53:11,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 08:53:11,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:53:11,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 08:53:11,918 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 08:53:11,948 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 08:53:11,948 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [835186310] [2020-10-14 08:53:11,948 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:53:11,949 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-14 08:53:11,949 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035429435] [2020-10-14 08:53:11,949 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 08:53:11,950 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:53:11,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 08:53:11,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-14 08:53:11,951 INFO L87 Difference]: Start difference. First operand 3233 states and 4992 transitions. Second operand 6 states. [2020-10-14 08:53:12,150 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-14 08:53:12,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:53:12,987 INFO L93 Difference]: Finished difference Result 9573 states and 14818 transitions. [2020-10-14 08:53:12,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-14 08:53:12,997 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 82 [2020-10-14 08:53:12,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:53:13,032 INFO L225 Difference]: With dead ends: 9573 [2020-10-14 08:53:13,033 INFO L226 Difference]: Without dead ends: 6387 [2020-10-14 08:53:13,041 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-10-14 08:53:13,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6387 states. [2020-10-14 08:53:13,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6387 to 6385. [2020-10-14 08:53:13,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6385 states. [2020-10-14 08:53:13,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6385 states to 6385 states and 9840 transitions. [2020-10-14 08:53:13,447 INFO L78 Accepts]: Start accepts. Automaton has 6385 states and 9840 transitions. Word has length 82 [2020-10-14 08:53:13,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:53:13,447 INFO L479 AbstractCegarLoop]: Abstraction has 6385 states and 9840 transitions. [2020-10-14 08:53:13,447 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 08:53:13,447 INFO L276 IsEmpty]: Start isEmpty. Operand 6385 states and 9840 transitions. [2020-10-14 08:53:13,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-14 08:53:13,448 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:53:13,448 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 08:53:13,448 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-14 08:53:13,449 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:53:13,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:53:13,449 INFO L82 PathProgramCache]: Analyzing trace with hash -1329761452, now seen corresponding path program 1 times [2020-10-14 08:53:13,450 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:53:13,450 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [186973972] [2020-10-14 08:53:13,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:53:13,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:53:13,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:53:13,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:53:13,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:53:13,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:53:15,540 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:53:15,540 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-14 08:53:15,541 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 08:53:15,541 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2070 [2020-10-14 08:53:15,541 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:53:15,541 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:53:15,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 08:53:15,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-14 08:53:15,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-14 08:53:15,541 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:53:15,792 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-10-14 08:53:15,793 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:53:15,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:53:15,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:53:15,819 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:53:15,819 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:53:15,819 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:53:15,820 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-14 08:53:15,820 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:53:15,820 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:53:15,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 08:53:15,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:53:15,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 08:53:15,821 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 08:53:15,848 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 08:53:15,854 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [186973972] [2020-10-14 08:53:15,854 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:53:15,855 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-14 08:53:15,855 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513344505] [2020-10-14 08:53:15,856 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 08:53:15,856 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:53:15,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 08:53:15,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-14 08:53:15,857 INFO L87 Difference]: Start difference. First operand 6385 states and 9840 transitions. Second operand 6 states. [2020-10-14 08:53:16,044 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-14 08:53:17,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:53:17,146 INFO L93 Difference]: Finished difference Result 18997 states and 29298 transitions. [2020-10-14 08:53:17,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-14 08:53:17,146 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 82 [2020-10-14 08:53:17,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:53:17,212 INFO L225 Difference]: With dead ends: 18997 [2020-10-14 08:53:17,212 INFO L226 Difference]: Without dead ends: 12659 [2020-10-14 08:53:17,226 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-10-14 08:53:17,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12659 states. [2020-10-14 08:53:17,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12659 to 12657. [2020-10-14 08:53:17,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12657 states. [2020-10-14 08:53:17,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12657 states to 12657 states and 19440 transitions. [2020-10-14 08:53:17,976 INFO L78 Accepts]: Start accepts. Automaton has 12657 states and 19440 transitions. Word has length 82 [2020-10-14 08:53:17,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:53:17,976 INFO L479 AbstractCegarLoop]: Abstraction has 12657 states and 19440 transitions. [2020-10-14 08:53:17,976 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 08:53:17,976 INFO L276 IsEmpty]: Start isEmpty. Operand 12657 states and 19440 transitions. [2020-10-14 08:53:17,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-14 08:53:17,978 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:53:17,978 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 08:53:17,978 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-14 08:53:17,979 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:53:17,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:53:17,979 INFO L82 PathProgramCache]: Analyzing trace with hash -2376263, now seen corresponding path program 1 times [2020-10-14 08:53:17,979 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:53:17,980 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1689138726] [2020-10-14 08:53:17,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:53:17,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:53:18,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:53:18,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:53:18,709 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:53:18,709 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-14 08:53:18,710 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 08:53:18,710 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 708 [2020-10-14 08:53:18,710 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:53:18,710 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:53:18,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 08:53:18,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-14 08:53:18,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-14 08:53:18,710 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:53:18,955 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-10-14 08:53:18,956 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:53:18,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:53:18,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:53:18,976 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:53:18,976 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:53:18,976 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:53:18,976 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-14 08:53:18,977 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:53:18,977 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:53:18,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 08:53:18,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:53:18,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 08:53:18,979 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 08:53:18,996 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 08:53:18,997 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1689138726] [2020-10-14 08:53:18,997 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:53:18,997 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-14 08:53:18,998 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957990500] [2020-10-14 08:53:18,998 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 08:53:18,998 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:53:18,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 08:53:18,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-14 08:53:18,999 INFO L87 Difference]: Start difference. First operand 12657 states and 19440 transitions. Second operand 6 states. [2020-10-14 08:53:19,202 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-14 08:53:20,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:53:20,507 INFO L93 Difference]: Finished difference Result 37877 states and 58226 transitions. [2020-10-14 08:53:20,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-14 08:53:20,508 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 82 [2020-10-14 08:53:20,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:53:20,577 INFO L225 Difference]: With dead ends: 37877 [2020-10-14 08:53:20,577 INFO L226 Difference]: Without dead ends: 25267 [2020-10-14 08:53:20,607 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-14 08:53:20,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25267 states. [2020-10-14 08:53:22,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25267 to 25265. [2020-10-14 08:53:22,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25265 states. [2020-10-14 08:53:22,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25265 states to 25265 states and 38576 transitions. [2020-10-14 08:53:22,375 INFO L78 Accepts]: Start accepts. Automaton has 25265 states and 38576 transitions. Word has length 82 [2020-10-14 08:53:22,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:53:22,376 INFO L479 AbstractCegarLoop]: Abstraction has 25265 states and 38576 transitions. [2020-10-14 08:53:22,376 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 08:53:22,376 INFO L276 IsEmpty]: Start isEmpty. Operand 25265 states and 38576 transitions. [2020-10-14 08:53:22,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-14 08:53:22,377 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:53:22,377 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 08:53:22,377 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-14 08:53:22,378 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:53:22,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:53:22,378 INFO L82 PathProgramCache]: Analyzing trace with hash 1718954612, now seen corresponding path program 1 times [2020-10-14 08:53:22,378 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:53:22,379 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1389147491] [2020-10-14 08:53:22,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:53:22,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:53:22,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:53:22,592 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:53:22,592 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-14 08:53:22,592 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:53:22,593 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 192 [2020-10-14 08:53:22,593 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:53:22,593 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:53:22,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-14 08:53:22,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-14 08:53:22,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-14 08:53:22,593 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:53:22,815 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-10-14 08:53:22,816 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:53:22,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:53:22,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:53:22,825 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:53:22,825 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:53:22,825 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:53:22,826 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-14 08:53:22,826 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:53:22,826 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:53:22,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:53:22,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:53:22,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:53:22,826 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:53:22,851 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 08:53:22,851 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1389147491] [2020-10-14 08:53:22,852 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:53:22,852 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-14 08:53:22,852 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070758933] [2020-10-14 08:53:22,852 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-14 08:53:22,853 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:53:22,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-14 08:53:22,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-14 08:53:22,853 INFO L87 Difference]: Start difference. First operand 25265 states and 38576 transitions. Second operand 9 states. [2020-10-14 08:53:23,095 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-14 08:53:37,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:53:37,565 INFO L93 Difference]: Finished difference Result 327881 states and 500924 transitions. [2020-10-14 08:53:37,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-14 08:53:37,566 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 82 [2020-10-14 08:53:37,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:53:38,279 INFO L225 Difference]: With dead ends: 327881 [2020-10-14 08:53:38,279 INFO L226 Difference]: Without dead ends: 302663 [2020-10-14 08:53:38,376 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=111, Invalid=231, Unknown=0, NotChecked=0, Total=342 [2020-10-14 08:53:38,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302663 states. [2020-10-14 08:53:43,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302663 to 50481. [2020-10-14 08:53:43,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50481 states. [2020-10-14 08:53:43,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50481 states to 50481 states and 76080 transitions. [2020-10-14 08:53:43,716 INFO L78 Accepts]: Start accepts. Automaton has 50481 states and 76080 transitions. Word has length 82 [2020-10-14 08:53:43,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:53:43,717 INFO L479 AbstractCegarLoop]: Abstraction has 50481 states and 76080 transitions. [2020-10-14 08:53:43,717 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-14 08:53:43,717 INFO L276 IsEmpty]: Start isEmpty. Operand 50481 states and 76080 transitions. [2020-10-14 08:53:43,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-14 08:53:43,718 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:53:43,718 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 08:53:43,718 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-14 08:53:43,718 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:53:43,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:53:43,719 INFO L82 PathProgramCache]: Analyzing trace with hash 1774799598, now seen corresponding path program 1 times [2020-10-14 08:53:43,719 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:53:43,719 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1161858026] [2020-10-14 08:53:43,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:53:43,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:53:43,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:53:43,954 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:53:43,954 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-14 08:53:43,954 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:53:43,954 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 210 [2020-10-14 08:53:43,955 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:53:43,955 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:53:43,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-14 08:53:43,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-14 08:53:43,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 73 [2020-10-14 08:53:43,955 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:53:44,234 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-10-14 08:53:44,235 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:53:44,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:53:44,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:53:44,246 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:53:44,247 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:53:44,247 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:53:44,247 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-14 08:53:44,247 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:53:44,247 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:53:44,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:53:44,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:53:44,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:53:44,248 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:53:44,279 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 08:53:44,279 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1161858026] [2020-10-14 08:53:44,279 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:53:44,280 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-14 08:53:44,280 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666152529] [2020-10-14 08:53:44,280 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-14 08:53:44,280 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:53:44,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-14 08:53:44,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-14 08:53:44,281 INFO L87 Difference]: Start difference. First operand 50481 states and 76080 transitions. Second operand 9 states. [2020-10-14 08:53:44,573 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-14 08:54:06,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:54:06,999 INFO L93 Difference]: Finished difference Result 353097 states and 532284 transitions. [2020-10-14 08:54:07,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-14 08:54:07,000 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 84 [2020-10-14 08:54:07,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:54:07,423 INFO L225 Difference]: With dead ends: 353097 [2020-10-14 08:54:07,423 INFO L226 Difference]: Without dead ends: 302663 [2020-10-14 08:54:07,503 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=111, Invalid=231, Unknown=0, NotChecked=0, Total=342 [2020-10-14 08:54:07,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302663 states. [2020-10-14 08:54:13,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302663 to 50481. [2020-10-14 08:54:13,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50481 states. [2020-10-14 08:54:13,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50481 states to 50481 states and 75568 transitions. [2020-10-14 08:54:13,135 INFO L78 Accepts]: Start accepts. Automaton has 50481 states and 75568 transitions. Word has length 84 [2020-10-14 08:54:13,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:54:13,135 INFO L479 AbstractCegarLoop]: Abstraction has 50481 states and 75568 transitions. [2020-10-14 08:54:13,135 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-14 08:54:13,135 INFO L276 IsEmpty]: Start isEmpty. Operand 50481 states and 75568 transitions. [2020-10-14 08:54:13,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-14 08:54:13,136 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:54:13,137 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 08:54:13,137 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-14 08:54:13,137 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:54:13,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:54:13,137 INFO L82 PathProgramCache]: Analyzing trace with hash 1754750255, now seen corresponding path program 1 times [2020-10-14 08:54:13,138 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:54:13,138 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [919851492] [2020-10-14 08:54:13,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:54:13,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:54:13,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:54:13,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:54:13,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:54:13,330 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:54:13,330 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-14 08:54:13,330 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 08:54:13,330 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 175 [2020-10-14 08:54:13,331 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:54:13,331 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:54:13,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 08:54:13,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 08:54:13,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-14 08:54:13,332 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:54:13,502 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-10-14 08:54:13,503 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:54:13,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:54:13,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:54:13,514 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:54:13,514 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:54:13,514 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:54:13,515 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-14 08:54:13,515 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:54:13,515 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:54:13,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:54:13,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:54:13,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:54:13,516 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:54:13,535 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 08:54:13,535 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [919851492] [2020-10-14 08:54:13,535 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:54:13,536 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 08:54:13,536 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420423324] [2020-10-14 08:54:13,536 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 08:54:13,536 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:54:13,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 08:54:13,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 08:54:13,537 INFO L87 Difference]: Start difference. First operand 50481 states and 75568 transitions. Second operand 4 states. [2020-10-14 08:54:13,706 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 152 [2020-10-14 08:54:20,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:54:20,181 INFO L93 Difference]: Finished difference Result 123317 states and 183730 transitions. [2020-10-14 08:54:20,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 08:54:20,182 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 84 [2020-10-14 08:54:20,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:54:20,264 INFO L225 Difference]: With dead ends: 123317 [2020-10-14 08:54:20,264 INFO L226 Difference]: Without dead ends: 72883 [2020-10-14 08:54:20,306 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 08:54:20,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72883 states. [2020-10-14 08:54:28,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72883 to 72369. [2020-10-14 08:54:28,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72369 states. [2020-10-14 08:54:28,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72369 states to 72369 states and 106416 transitions. [2020-10-14 08:54:28,505 INFO L78 Accepts]: Start accepts. Automaton has 72369 states and 106416 transitions. Word has length 84 [2020-10-14 08:54:28,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:54:28,505 INFO L479 AbstractCegarLoop]: Abstraction has 72369 states and 106416 transitions. [2020-10-14 08:54:28,505 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 08:54:28,505 INFO L276 IsEmpty]: Start isEmpty. Operand 72369 states and 106416 transitions. [2020-10-14 08:54:28,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-14 08:54:28,506 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:54:28,506 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 08:54:28,506 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-14 08:54:28,506 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:54:28,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:54:28,507 INFO L82 PathProgramCache]: Analyzing trace with hash -817696616, now seen corresponding path program 1 times [2020-10-14 08:54:28,508 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:54:28,508 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [232266799] [2020-10-14 08:54:28,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:54:28,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:54:28,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:54:28,644 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:54:28,644 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-14 08:54:28,644 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:54:28,644 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 113 [2020-10-14 08:54:28,644 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:54:28,645 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:54:28,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 08:54:28,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 87 [2020-10-14 08:54:28,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-14 08:54:28,645 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:54:28,865 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-10-14 08:54:28,866 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:54:28,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:54:28,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:54:28,886 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:54:28,887 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:54:28,887 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:54:28,887 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-14 08:54:28,888 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:54:28,888 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:54:28,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:54:28,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:54:28,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:54:28,889 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 08:54:28,909 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 08:54:28,910 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [232266799] [2020-10-14 08:54:28,911 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:54:28,911 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-14 08:54:28,912 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589379866] [2020-10-14 08:54:28,912 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 08:54:28,912 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:54:28,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 08:54:28,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-14 08:54:28,914 INFO L87 Difference]: Start difference. First operand 72369 states and 106416 transitions. Second operand 5 states. [2020-10-14 08:54:40,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:54:40,184 INFO L93 Difference]: Finished difference Result 131488 states and 193263 transitions. [2020-10-14 08:54:40,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-14 08:54:40,185 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 85 [2020-10-14 08:54:40,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:54:40,324 INFO L225 Difference]: With dead ends: 131488 [2020-10-14 08:54:40,325 INFO L226 Difference]: Without dead ends: 131486 [2020-10-14 08:54:40,350 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-14 08:54:40,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131486 states. [2020-10-14 08:54:47,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131486 to 74417. [2020-10-14 08:54:47,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74417 states. [2020-10-14 08:54:47,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74417 states to 74417 states and 108208 transitions. [2020-10-14 08:54:47,518 INFO L78 Accepts]: Start accepts. Automaton has 74417 states and 108208 transitions. Word has length 85 [2020-10-14 08:54:47,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:54:47,519 INFO L479 AbstractCegarLoop]: Abstraction has 74417 states and 108208 transitions. [2020-10-14 08:54:47,519 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 08:54:47,519 INFO L276 IsEmpty]: Start isEmpty. Operand 74417 states and 108208 transitions. [2020-10-14 08:54:47,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-14 08:54:47,520 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:54:47,520 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 08:54:47,520 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-14 08:54:47,520 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:54:47,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:54:47,521 INFO L82 PathProgramCache]: Analyzing trace with hash 876944192, now seen corresponding path program 1 times [2020-10-14 08:54:47,521 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:54:47,521 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1106782697] [2020-10-14 08:54:47,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:54:47,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:54:47,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:54:47,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:54:47,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:54:48,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:54:49,391 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:54:49,391 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-14 08:54:49,391 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 08:54:49,392 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1855 [2020-10-14 08:54:49,392 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:54:49,392 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:54:49,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 08:54:49,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-14 08:54:49,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-14 08:54:49,392 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:54:49,554 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-10-14 08:54:49,555 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:54:49,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:54:49,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:54:49,565 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:54:49,565 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:54:49,565 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:54:49,565 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-14 08:54:49,565 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:54:49,566 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:54:49,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:54:49,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:54:49,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:54:49,566 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:54:49,577 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 08:54:49,578 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1106782697] [2020-10-14 08:54:49,578 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:54:49,578 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 08:54:49,578 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518496357] [2020-10-14 08:54:49,579 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 08:54:49,579 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:54:49,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 08:54:49,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 08:54:49,579 INFO L87 Difference]: Start difference. First operand 74417 states and 108208 transitions. Second operand 4 states. [2020-10-14 08:54:49,749 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 152 [2020-10-14 08:55:02,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:55:02,346 INFO L93 Difference]: Finished difference Result 169144 states and 247478 transitions. [2020-10-14 08:55:02,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 08:55:02,346 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 85 [2020-10-14 08:55:02,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:55:02,475 INFO L225 Difference]: With dead ends: 169144 [2020-10-14 08:55:02,475 INFO L226 Difference]: Without dead ends: 116661 [2020-10-14 08:55:02,515 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 08:55:02,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116661 states. [2020-10-14 08:55:15,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116661 to 116659. [2020-10-14 08:55:15,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116659 states. [2020-10-14 08:55:15,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116659 states to 116659 states and 168882 transitions. [2020-10-14 08:55:15,326 INFO L78 Accepts]: Start accepts. Automaton has 116659 states and 168882 transitions. Word has length 85 [2020-10-14 08:55:15,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:55:15,326 INFO L479 AbstractCegarLoop]: Abstraction has 116659 states and 168882 transitions. [2020-10-14 08:55:15,326 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 08:55:15,326 INFO L276 IsEmpty]: Start isEmpty. Operand 116659 states and 168882 transitions. [2020-10-14 08:55:15,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-10-14 08:55:15,341 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:55:15,341 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:55:15,342 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-14 08:55:15,342 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:55:15,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:55:15,342 INFO L82 PathProgramCache]: Analyzing trace with hash -220569287, now seen corresponding path program 1 times [2020-10-14 08:55:15,342 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:55:15,343 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1583214398] [2020-10-14 08:55:15,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:55:15,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:55:15,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:55:15,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:55:15,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:55:15,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:55:15,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:55:16,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:55:17,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:55:17,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:55:17,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:55:18,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:55:19,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:55:19,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:55:19,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:55:19,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:55:20,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:55:20,380 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:55:20,381 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 122 [2020-10-14 08:55:20,381 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-14 08:55:20,381 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-14 08:55:20,381 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:55:20,381 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:55:20,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 08:55:20,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 57 [2020-10-14 08:55:20,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-14 08:55:20,382 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:55:20,562 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-10-14 08:55:20,563 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:55:20,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:55:20,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:55:20,573 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:55:20,573 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:55:20,573 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:55:20,573 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-14 08:55:20,573 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:55:20,574 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:55:20,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:55:20,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:55:20,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:55:20,575 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 08:55:20,589 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 08:55:20,590 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1583214398] [2020-10-14 08:55:20,590 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:55:20,590 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 08:55:20,590 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673049471] [2020-10-14 08:55:20,590 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 08:55:20,591 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:55:20,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 08:55:20,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 08:55:20,591 INFO L87 Difference]: Start difference. First operand 116659 states and 168882 transitions. Second operand 4 states. [2020-10-14 08:55:30,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:55:30,805 INFO L93 Difference]: Finished difference Result 211427 states and 307177 transitions. [2020-10-14 08:55:30,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 08:55:30,805 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 116 [2020-10-14 08:55:30,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:55:30,897 INFO L225 Difference]: With dead ends: 211427 [2020-10-14 08:55:30,897 INFO L226 Difference]: Without dead ends: 94817 [2020-10-14 08:55:30,966 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 08:55:31,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94817 states. [2020-10-14 08:55:42,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94817 to 94815. [2020-10-14 08:55:42,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94815 states. [2020-10-14 08:55:42,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94815 states to 94815 states and 137318 transitions. [2020-10-14 08:55:42,950 INFO L78 Accepts]: Start accepts. Automaton has 94815 states and 137318 transitions. Word has length 116 [2020-10-14 08:55:42,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:55:42,950 INFO L479 AbstractCegarLoop]: Abstraction has 94815 states and 137318 transitions. [2020-10-14 08:55:42,950 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 08:55:42,951 INFO L276 IsEmpty]: Start isEmpty. Operand 94815 states and 137318 transitions. [2020-10-14 08:55:42,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-10-14 08:55:42,962 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:55:42,962 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, 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 08:55:42,962 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-14 08:55:42,963 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:55:42,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:55:42,963 INFO L82 PathProgramCache]: Analyzing trace with hash -583117170, now seen corresponding path program 1 times [2020-10-14 08:55:42,963 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:55:42,963 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [882472029] [2020-10-14 08:55:42,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:55:42,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:55:43,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:55:43,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:55:43,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:55:43,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:55:43,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:55:44,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:55:44,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:55:44,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:55:44,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:55:44,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:55:45,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:55:46,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:55:46,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:55:46,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:55:47,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:55:47,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:55:47,999 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:55:47,999 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 123 [2020-10-14 08:55:47,999 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-14 08:55:47,999 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-14 08:55:48,000 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:55:48,000 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:55:48,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 08:55:48,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-14 08:55:48,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 106 [2020-10-14 08:55:48,000 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:55:48,192 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-10-14 08:55:48,193 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:55:48,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:55:48,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:55:48,203 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:55:48,203 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:55:48,203 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:55:48,203 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-14 08:55:48,204 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:55:48,204 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:55:48,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:55:48,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:55:48,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:55:48,204 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:55:48,228 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 08:55:48,228 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [882472029] [2020-10-14 08:55:48,228 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 08:55:48,229 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-14 08:55:48,229 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108689770] [2020-10-14 08:55:48,229 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 08:55:48,230 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:55:48,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 08:55:48,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-14 08:55:48,230 INFO L87 Difference]: Start difference. First operand 94815 states and 137318 transitions. Second operand 6 states. [2020-10-14 08:55:48,438 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 155