/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.4 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.6.1.ufo.BOUNDED-12.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-14 09:19:55,282 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-14 09:19:55,285 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-14 09:19:55,322 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-14 09:19:55,323 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-14 09:19:55,324 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-14 09:19:55,325 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-14 09:19:55,326 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-14 09:19:55,328 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-14 09:19:55,329 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-14 09:19:55,330 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-14 09:19:55,331 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-14 09:19:55,331 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-14 09:19:55,332 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-14 09:19:55,333 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-14 09:19:55,334 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-14 09:19:55,335 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-14 09:19:55,335 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-14 09:19:55,337 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-14 09:19:55,339 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-14 09:19:55,340 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-14 09:19:55,341 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-14 09:19:55,342 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-14 09:19:55,343 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-14 09:19:55,345 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-14 09:19:55,345 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-14 09:19:55,345 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-14 09:19:55,346 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-14 09:19:55,347 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-14 09:19:55,347 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-14 09:19:55,348 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-14 09:19:55,348 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-14 09:19:55,349 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-14 09:19:55,350 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-14 09:19:55,350 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-14 09:19:55,351 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-14 09:19:55,351 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-14 09:19:55,352 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-14 09:19:55,352 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-14 09:19:55,353 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-14 09:19:55,353 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-14 09:19:55,354 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-14 09:19:55,375 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-14 09:19:55,375 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-14 09:19:55,376 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-14 09:19:55,377 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-14 09:19:55,377 INFO L138 SettingsManager]: * Use SBE=true [2020-10-14 09:19:55,377 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-14 09:19:55,377 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-14 09:19:55,378 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-14 09:19:55,378 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-14 09:19:55,378 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-14 09:19:55,378 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-14 09:19:55,378 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-14 09:19:55,378 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-14 09:19:55,379 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-14 09:19:55,379 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-14 09:19:55,379 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-14 09:19:55,379 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-14 09:19:55,379 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-14 09:19:55,380 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-14 09:19:55,380 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-14 09:19:55,380 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-14 09:19:55,380 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 09:19:55,380 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-14 09:19:55,381 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-14 09:19:55,381 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-14 09:19:55,381 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-14 09:19:55,381 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-14 09:19:55,381 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-14 09:19:55,382 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-14 09:19:55,382 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; [2020-10-14 09:19:55,676 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-14 09:19:55,691 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-14 09:19:55,694 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-14 09:19:55,696 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-14 09:19:55,696 INFO L275 PluginConnector]: CDTParser initialized [2020-10-14 09:19:55,697 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.6.1.ufo.BOUNDED-12.pals.c.v+cfa-reducer.c [2020-10-14 09:19:55,756 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d3189076e/98fb8d1c125c4644ba9961549e4ee1d7/FLAG4945a2d01 [2020-10-14 09:19:56,238 INFO L306 CDTParser]: Found 1 translation units. [2020-10-14 09:19:56,238 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.6.1.ufo.BOUNDED-12.pals.c.v+cfa-reducer.c [2020-10-14 09:19:56,251 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d3189076e/98fb8d1c125c4644ba9961549e4ee1d7/FLAG4945a2d01 [2020-10-14 09:19:56,598 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d3189076e/98fb8d1c125c4644ba9961549e4ee1d7 [2020-10-14 09:19:56,606 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-14 09:19:56,608 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-14 09:19:56,609 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-14 09:19:56,609 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-14 09:19:56,614 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-14 09:19:56,615 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:19:56" (1/1) ... [2020-10-14 09:19:56,618 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1c6b7cfa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:19:56, skipping insertion in model container [2020-10-14 09:19:56,618 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:19:56" (1/1) ... [2020-10-14 09:19:56,626 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-14 09:19:56,695 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-14 09:19:56,999 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 09:19:57,110 INFO L203 MainTranslator]: Completed pre-run [2020-10-14 09:19:57,189 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 09:19:57,212 INFO L208 MainTranslator]: Completed translation [2020-10-14 09:19:57,213 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:19:57 WrapperNode [2020-10-14 09:19:57,213 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-14 09:19:57,214 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-14 09:19:57,214 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-14 09:19:57,214 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-14 09:19:57,232 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:19:57" (1/1) ... [2020-10-14 09:19:57,232 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:19:57" (1/1) ... [2020-10-14 09:19:57,247 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:19:57" (1/1) ... [2020-10-14 09:19:57,247 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:19:57" (1/1) ... [2020-10-14 09:19:57,263 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:19:57" (1/1) ... [2020-10-14 09:19:57,275 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:19:57" (1/1) ... [2020-10-14 09:19:57,279 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:19:57" (1/1) ... [2020-10-14 09:19:57,284 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-14 09:19:57,284 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-14 09:19:57,285 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-14 09:19:57,285 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-14 09:19:57,286 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:19:57" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 09:19:57,353 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-14 09:19:57,353 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-14 09:19:57,353 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-14 09:19:57,353 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-14 09:19:57,354 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-14 09:19:57,355 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-14 09:19:57,355 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-14 09:19:57,356 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-14 09:19:57,356 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-14 09:19:57,356 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-14 09:19:57,357 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-14 09:19:57,357 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-14 09:19:57,357 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-14 09:19:57,357 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-14 09:19:57,357 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-14 09:19:57,359 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-14 09:19:57,360 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-10-14 09:19:57,360 INFO L130 BoogieDeclarations]: Found specification of procedure node6 [2020-10-14 09:19:57,360 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-14 09:19:57,360 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-14 09:19:57,361 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-14 09:19:57,361 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-14 09:19:57,361 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-14 09:19:58,133 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-14 09:19:58,133 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-14 09:19:58,139 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:19:58 BoogieIcfgContainer [2020-10-14 09:19:58,139 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-14 09:19:58,140 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-14 09:19:58,140 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-14 09:19:58,143 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-14 09:19:58,144 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 09:19:56" (1/3) ... [2020-10-14 09:19:58,145 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e4e1dcd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:19:58, skipping insertion in model container [2020-10-14 09:19:58,145 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:19:57" (2/3) ... [2020-10-14 09:19:58,145 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e4e1dcd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:19:58, skipping insertion in model container [2020-10-14 09:19:58,145 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:19:58" (3/3) ... [2020-10-14 09:19:58,147 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.6.1.ufo.BOUNDED-12.pals.c.v+cfa-reducer.c [2020-10-14 09:19:58,158 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-14 09:19:58,166 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-14 09:19:58,181 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-14 09:19:58,207 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-14 09:19:58,207 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-14 09:19:58,207 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-14 09:19:58,208 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-14 09:19:58,208 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-14 09:19:58,208 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-14 09:19:58,208 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-14 09:19:58,209 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-14 09:19:58,232 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states. [2020-10-14 09:19:58,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-14 09:19:58,244 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:19:58,246 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 09:19:58,246 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:19:58,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:19:58,253 INFO L82 PathProgramCache]: Analyzing trace with hash 1068794681, now seen corresponding path program 1 times [2020-10-14 09:19:58,262 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:19:58,263 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [20377213] [2020-10-14 09:19:58,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:19:58,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:19:58,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:19:58,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:19:58,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:19:59,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:19:59,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:20:00,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:20:01,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:20:03,621 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:20:03,622 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-14 09:20:03,622 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 09:20:03,622 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-14 09:20:03,625 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:20:03,625 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:20:03,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:20:03,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-14 09:20:03,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-14 09:20:03,627 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-14 09:20:04,049 WARN L193 SmtUtils]: Spent 281.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-14 09:20:04,055 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:20:04,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:20:04,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:20:04,072 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:20:04,073 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:20:04,073 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:20:04,073 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-14 09:20:04,073 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:20:04,074 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:20:04,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:20:04,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:20:04,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:20:04,075 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:20:04,108 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:20:04,109 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [20377213] [2020-10-14 09:20:04,111 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:20:04,112 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:20:04,114 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228919075] [2020-10-14 09:20:04,121 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:20:04,122 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:20:04,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:20:04,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:20:04,143 INFO L87 Difference]: Start difference. First operand 168 states. Second operand 4 states. [2020-10-14 09:20:04,476 WARN L193 SmtUtils]: Spent 260.00 ms on a formula simplification that was a NOOP. DAG size: 173 [2020-10-14 09:20:05,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:20:05,514 INFO L93 Difference]: Finished difference Result 392 states and 634 transitions. [2020-10-14 09:20:05,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 09:20:05,515 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 77 [2020-10-14 09:20:05,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:20:05,544 INFO L225 Difference]: With dead ends: 392 [2020-10-14 09:20:05,545 INFO L226 Difference]: Without dead ends: 264 [2020-10-14 09:20:05,550 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 09:20:05,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2020-10-14 09:20:05,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 262. [2020-10-14 09:20:05,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 262 states. [2020-10-14 09:20:05,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 390 transitions. [2020-10-14 09:20:05,618 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 390 transitions. Word has length 77 [2020-10-14 09:20:05,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:20:05,619 INFO L479 AbstractCegarLoop]: Abstraction has 262 states and 390 transitions. [2020-10-14 09:20:05,619 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:20:05,619 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 390 transitions. [2020-10-14 09:20:05,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-14 09:20:05,623 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:20:05,623 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 09:20:05,624 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-14 09:20:05,624 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:20:05,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:20:05,625 INFO L82 PathProgramCache]: Analyzing trace with hash 234376323, now seen corresponding path program 1 times [2020-10-14 09:20:05,625 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:20:05,625 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1461906046] [2020-10-14 09:20:05,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:20:05,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:20:05,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:20:05,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:20:05,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:20:05,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:20:06,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:20:06,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:20:10,697 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:20:10,697 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-14 09:20:10,698 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 09:20:10,698 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-14 09:20:10,699 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:20:10,699 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:20:10,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:20:10,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 37 [2020-10-14 09:20:10,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-14 09:20:10,709 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 10 [2020-10-14 09:20:10,962 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-14 09:20:10,963 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:20:10,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:20:10,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:20:10,978 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:20:10,978 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:20:10,978 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:20:10,979 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-14 09:20:10,979 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:20:10,979 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:20:10,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:20:10,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:20:10,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:20:10,980 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:20:11,000 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:20:11,000 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1461906046] [2020-10-14 09:20:11,000 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:20:11,001 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:20:11,001 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528880203] [2020-10-14 09:20:11,003 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:20:11,003 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:20:11,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:20:11,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:20:11,004 INFO L87 Difference]: Start difference. First operand 262 states and 390 transitions. Second operand 4 states. [2020-10-14 09:20:11,221 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 173 [2020-10-14 09:20:11,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:20:11,901 INFO L93 Difference]: Finished difference Result 658 states and 1022 transitions. [2020-10-14 09:20:11,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 09:20:11,903 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 78 [2020-10-14 09:20:11,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:20:11,908 INFO L225 Difference]: With dead ends: 658 [2020-10-14 09:20:11,908 INFO L226 Difference]: Without dead ends: 444 [2020-10-14 09:20:11,912 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 09:20:11,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 444 states. [2020-10-14 09:20:11,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 444 to 442. [2020-10-14 09:20:11,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 442 states. [2020-10-14 09:20:11,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 442 states to 442 states and 677 transitions. [2020-10-14 09:20:11,969 INFO L78 Accepts]: Start accepts. Automaton has 442 states and 677 transitions. Word has length 78 [2020-10-14 09:20:11,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:20:11,970 INFO L479 AbstractCegarLoop]: Abstraction has 442 states and 677 transitions. [2020-10-14 09:20:11,970 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:20:11,970 INFO L276 IsEmpty]: Start isEmpty. Operand 442 states and 677 transitions. [2020-10-14 09:20:11,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-14 09:20:11,973 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:20:11,973 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 09:20:11,974 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-14 09:20:11,974 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:20:11,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:20:11,974 INFO L82 PathProgramCache]: Analyzing trace with hash -672417310, now seen corresponding path program 1 times [2020-10-14 09:20:11,974 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:20:11,975 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [744017169] [2020-10-14 09:20:11,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:20:12,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:20:12,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:20:12,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:20:12,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:20:12,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:20:12,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:20:15,069 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:20:15,069 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-14 09:20:15,070 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 09:20:15,070 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3068 [2020-10-14 09:20:15,070 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:20:15,070 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:20:15,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:20:15,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-14 09:20:15,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-14 09:20:15,071 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:20:15,299 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-14 09:20:15,301 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:20:15,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:20:15,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:20:15,320 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:20:15,320 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:20:15,321 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:20:15,321 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-14 09:20:15,321 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:20:15,321 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:20:15,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:20:15,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:20:15,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:20:15,322 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:20:15,344 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:20:15,344 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [744017169] [2020-10-14 09:20:15,346 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:20:15,346 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:20:15,346 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727362291] [2020-10-14 09:20:15,347 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:20:15,347 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:20:15,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:20:15,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:20:15,348 INFO L87 Difference]: Start difference. First operand 442 states and 677 transitions. Second operand 4 states. [2020-10-14 09:20:15,559 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 173 [2020-10-14 09:20:16,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:20:16,300 INFO L93 Difference]: Finished difference Result 1166 states and 1831 transitions. [2020-10-14 09:20:16,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 09:20:16,301 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 79 [2020-10-14 09:20:16,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:20:16,306 INFO L225 Difference]: With dead ends: 1166 [2020-10-14 09:20:16,306 INFO L226 Difference]: Without dead ends: 772 [2020-10-14 09:20:16,308 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 09:20:16,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 772 states. [2020-10-14 09:20:16,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 772 to 770. [2020-10-14 09:20:16,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 770 states. [2020-10-14 09:20:16,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 770 states to 770 states and 1197 transitions. [2020-10-14 09:20:16,358 INFO L78 Accepts]: Start accepts. Automaton has 770 states and 1197 transitions. Word has length 79 [2020-10-14 09:20:16,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:20:16,359 INFO L479 AbstractCegarLoop]: Abstraction has 770 states and 1197 transitions. [2020-10-14 09:20:16,359 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:20:16,359 INFO L276 IsEmpty]: Start isEmpty. Operand 770 states and 1197 transitions. [2020-10-14 09:20:16,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-14 09:20:16,361 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:20:16,361 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 09:20:16,362 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-14 09:20:16,362 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:20:16,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:20:16,362 INFO L82 PathProgramCache]: Analyzing trace with hash 82652269, now seen corresponding path program 1 times [2020-10-14 09:20:16,362 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:20:16,363 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1740430011] [2020-10-14 09:20:16,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:20:16,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:20:16,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:20:16,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:20:16,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:20:16,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:20:17,857 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:20:17,858 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-14 09:20:17,858 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 09:20:17,858 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1470 [2020-10-14 09:20:17,859 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:20:17,859 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:20:17,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:20:17,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-14 09:20:17,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-14 09:20:17,860 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:20:18,107 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-14 09:20:18,108 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:20:18,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:20:18,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:20:18,124 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:20:18,124 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:20:18,124 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:20:18,124 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-14 09:20:18,125 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:20:18,125 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:20:18,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:20:18,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:20:18,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:20:18,126 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:20:18,158 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:20:18,159 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1740430011] [2020-10-14 09:20:18,159 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:20:18,160 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:20:18,160 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214072268] [2020-10-14 09:20:18,160 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:20:18,161 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:20:18,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:20:18,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:20:18,161 INFO L87 Difference]: Start difference. First operand 770 states and 1197 transitions. Second operand 4 states. [2020-10-14 09:20:18,456 WARN L193 SmtUtils]: Spent 257.00 ms on a formula simplification that was a NOOP. DAG size: 173 [2020-10-14 09:20:19,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:20:19,318 INFO L93 Difference]: Finished difference Result 2086 states and 3287 transitions. [2020-10-14 09:20:19,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 09:20:19,319 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 80 [2020-10-14 09:20:19,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:20:19,329 INFO L225 Difference]: With dead ends: 2086 [2020-10-14 09:20:19,329 INFO L226 Difference]: Without dead ends: 1364 [2020-10-14 09:20:19,332 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 09:20:19,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1364 states. [2020-10-14 09:20:19,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1364 to 1362. [2020-10-14 09:20:19,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1362 states. [2020-10-14 09:20:19,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1362 states to 1362 states and 2129 transitions. [2020-10-14 09:20:19,411 INFO L78 Accepts]: Start accepts. Automaton has 1362 states and 2129 transitions. Word has length 80 [2020-10-14 09:20:19,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:20:19,412 INFO L479 AbstractCegarLoop]: Abstraction has 1362 states and 2129 transitions. [2020-10-14 09:20:19,412 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:20:19,413 INFO L276 IsEmpty]: Start isEmpty. Operand 1362 states and 2129 transitions. [2020-10-14 09:20:19,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-14 09:20:19,414 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:20:19,415 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 09:20:19,415 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-14 09:20:19,415 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:20:19,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:20:19,416 INFO L82 PathProgramCache]: Analyzing trace with hash -1374721033, now seen corresponding path program 1 times [2020-10-14 09:20:19,416 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:20:19,416 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1988374771] [2020-10-14 09:20:19,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:20:19,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:20:19,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:20:19,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:20:19,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:20:20,528 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:20:20,528 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-14 09:20:20,528 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 09:20:20,528 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1082 [2020-10-14 09:20:20,529 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:20:20,529 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:20:20,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:20:20,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-14 09:20:20,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-14 09:20:20,530 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:20:20,724 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-14 09:20:20,725 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:20:20,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:20:20,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:20:20,737 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:20:20,737 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:20:20,737 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:20:20,737 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-14 09:20:20,738 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:20:20,738 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:20:20,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:20:20,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:20:20,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:20:20,739 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:20:20,757 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:20:20,758 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1988374771] [2020-10-14 09:20:20,758 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:20:20,758 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:20:20,758 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78448434] [2020-10-14 09:20:20,759 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:20:20,759 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:20:20,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:20:20,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:20:20,760 INFO L87 Difference]: Start difference. First operand 1362 states and 2129 transitions. Second operand 4 states. [2020-10-14 09:20:20,952 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 173 [2020-10-14 09:20:21,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:20:21,931 INFO L93 Difference]: Finished difference Result 3734 states and 5875 transitions. [2020-10-14 09:20:21,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 09:20:21,932 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 81 [2020-10-14 09:20:21,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:20:21,944 INFO L225 Difference]: With dead ends: 3734 [2020-10-14 09:20:21,944 INFO L226 Difference]: Without dead ends: 2420 [2020-10-14 09:20:21,947 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 09:20:21,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2420 states. [2020-10-14 09:20:22,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2420 to 2418. [2020-10-14 09:20:22,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2418 states. [2020-10-14 09:20:22,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2418 states to 2418 states and 3777 transitions. [2020-10-14 09:20:22,060 INFO L78 Accepts]: Start accepts. Automaton has 2418 states and 3777 transitions. Word has length 81 [2020-10-14 09:20:22,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:20:22,062 INFO L479 AbstractCegarLoop]: Abstraction has 2418 states and 3777 transitions. [2020-10-14 09:20:22,062 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:20:22,063 INFO L276 IsEmpty]: Start isEmpty. Operand 2418 states and 3777 transitions. [2020-10-14 09:20:22,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-14 09:20:22,064 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:20:22,064 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 09:20:22,064 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-14 09:20:22,064 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:20:22,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:20:22,065 INFO L82 PathProgramCache]: Analyzing trace with hash 65817793, now seen corresponding path program 1 times [2020-10-14 09:20:22,065 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:20:22,065 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [95856357] [2020-10-14 09:20:22,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:20:22,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:20:22,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:20:22,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:20:22,623 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:20:22,623 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-14 09:20:22,623 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 09:20:22,623 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 535 [2020-10-14 09:20:22,624 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:20:22,624 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:20:22,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:20:22,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-14 09:20:22,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-14 09:20:22,624 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:20:22,837 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-14 09:20:22,837 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:20:22,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:20:22,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:20:22,850 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:20:22,850 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:20:22,850 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:20:22,850 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-14 09:20:22,850 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:20:22,852 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:20:22,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:20:22,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:20:22,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:20:22,853 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-14 09:20:22,881 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:20:22,882 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [95856357] [2020-10-14 09:20:22,883 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:20:22,883 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:20:22,884 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746004791] [2020-10-14 09:20:22,885 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:20:22,885 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:20:22,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:20:22,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:20:22,886 INFO L87 Difference]: Start difference. First operand 2418 states and 3777 transitions. Second operand 4 states. [2020-10-14 09:20:23,103 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 173 [2020-10-14 09:20:24,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:20:24,440 INFO L93 Difference]: Finished difference Result 6646 states and 10403 transitions. [2020-10-14 09:20:24,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 09:20:24,441 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 82 [2020-10-14 09:20:24,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:20:24,470 INFO L225 Difference]: With dead ends: 6646 [2020-10-14 09:20:24,471 INFO L226 Difference]: Without dead ends: 4276 [2020-10-14 09:20:24,479 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 09:20:24,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4276 states. [2020-10-14 09:20:24,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4276 to 4274. [2020-10-14 09:20:24,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4274 states. [2020-10-14 09:20:24,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4274 states to 4274 states and 6641 transitions. [2020-10-14 09:20:24,789 INFO L78 Accepts]: Start accepts. Automaton has 4274 states and 6641 transitions. Word has length 82 [2020-10-14 09:20:24,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:20:24,789 INFO L479 AbstractCegarLoop]: Abstraction has 4274 states and 6641 transitions. [2020-10-14 09:20:24,789 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:20:24,790 INFO L276 IsEmpty]: Start isEmpty. Operand 4274 states and 6641 transitions. [2020-10-14 09:20:24,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-14 09:20:24,791 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:20:24,791 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] [2020-10-14 09:20:24,791 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-14 09:20:24,792 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:20:24,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:20:24,792 INFO L82 PathProgramCache]: Analyzing trace with hash 363991160, now seen corresponding path program 1 times [2020-10-14 09:20:24,792 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:20:24,793 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [678993488] [2020-10-14 09:20:24,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:20:24,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:20:24,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:20:24,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:20:25,827 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:20:25,827 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-14 09:20:25,828 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 09:20:25,828 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1009 [2020-10-14 09:20:25,828 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:20:25,828 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:20:25,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-14 09:20:25,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-14 09:20:25,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-14 09:20:25,829 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:20:26,090 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-14 09:20:26,091 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:20:26,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:20:26,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:20:26,107 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:20:26,108 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:20:26,108 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:20:26,108 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-14 09:20:26,109 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:20:26,109 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:20:26,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:20:26,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:20:26,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:20:26,111 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:20:26,145 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:20:26,145 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [678993488] [2020-10-14 09:20:26,146 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:20:26,146 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-14 09:20:26,146 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429534897] [2020-10-14 09:20:26,147 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-14 09:20:26,147 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:20:26,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-14 09:20:26,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-14 09:20:26,148 INFO L87 Difference]: Start difference. First operand 4274 states and 6641 transitions. Second operand 9 states. [2020-10-14 09:20:26,430 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-10-14 09:20:28,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:20:28,154 INFO L93 Difference]: Finished difference Result 33856 states and 52792 transitions. [2020-10-14 09:20:28,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-14 09:20:28,155 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 83 [2020-10-14 09:20:28,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:20:28,270 INFO L225 Difference]: With dead ends: 33856 [2020-10-14 09:20:28,270 INFO L226 Difference]: Without dead ends: 29630 [2020-10-14 09:20:28,290 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2020-10-14 09:20:28,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29630 states. [2020-10-14 09:20:29,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29630 to 8498. [2020-10-14 09:20:29,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8498 states. [2020-10-14 09:20:29,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8498 states to 8498 states and 13105 transitions. [2020-10-14 09:20:29,058 INFO L78 Accepts]: Start accepts. Automaton has 8498 states and 13105 transitions. Word has length 83 [2020-10-14 09:20:29,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:20:29,058 INFO L479 AbstractCegarLoop]: Abstraction has 8498 states and 13105 transitions. [2020-10-14 09:20:29,058 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-14 09:20:29,058 INFO L276 IsEmpty]: Start isEmpty. Operand 8498 states and 13105 transitions. [2020-10-14 09:20:29,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-14 09:20:29,059 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:20:29,060 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 09:20:29,060 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-14 09:20:29,060 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:20:29,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:20:29,060 INFO L82 PathProgramCache]: Analyzing trace with hash -1619708598, now seen corresponding path program 1 times [2020-10-14 09:20:29,061 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:20:29,061 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2120179020] [2020-10-14 09:20:29,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:20:29,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:20:29,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:20:29,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:20:29,807 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:20:29,808 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-14 09:20:29,808 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 09:20:29,808 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 723 [2020-10-14 09:20:29,808 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:20:29,809 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:20:29,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 09:20:29,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 86 [2020-10-14 09:20:29,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-14 09:20:29,809 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:20:30,072 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-14 09:20:30,074 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:20:30,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:20:30,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:20:30,088 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:20:30,088 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:20:30,089 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:20:30,089 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-14 09:20:30,089 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:20:30,089 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:20:30,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:20:30,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:20:30,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:20:30,090 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:20:30,103 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:20:30,104 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2120179020] [2020-10-14 09:20:30,104 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:20:30,104 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-14 09:20:30,105 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160195543] [2020-10-14 09:20:30,105 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 09:20:30,105 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:20:30,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 09:20:30,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-14 09:20:30,106 INFO L87 Difference]: Start difference. First operand 8498 states and 13105 transitions. Second operand 5 states. [2020-10-14 09:20:31,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:20:31,826 INFO L93 Difference]: Finished difference Result 17204 states and 26418 transitions. [2020-10-14 09:20:31,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-14 09:20:31,826 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 84 [2020-10-14 09:20:31,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:20:31,863 INFO L225 Difference]: With dead ends: 17204 [2020-10-14 09:20:31,863 INFO L226 Difference]: Without dead ends: 17202 [2020-10-14 09:20:31,870 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 09:20:31,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17202 states. [2020-10-14 09:20:33,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17202 to 8754. [2020-10-14 09:20:33,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8754 states. [2020-10-14 09:20:33,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8754 states to 8754 states and 13361 transitions. [2020-10-14 09:20:33,030 INFO L78 Accepts]: Start accepts. Automaton has 8754 states and 13361 transitions. Word has length 84 [2020-10-14 09:20:33,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:20:33,031 INFO L479 AbstractCegarLoop]: Abstraction has 8754 states and 13361 transitions. [2020-10-14 09:20:33,031 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 09:20:33,031 INFO L276 IsEmpty]: Start isEmpty. Operand 8754 states and 13361 transitions. [2020-10-14 09:20:33,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-14 09:20:33,032 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:20:33,032 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 09:20:33,032 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-14 09:20:33,032 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:20:33,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:20:33,033 INFO L82 PathProgramCache]: Analyzing trace with hash 1338260839, now seen corresponding path program 1 times [2020-10-14 09:20:33,033 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:20:33,033 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [170937220] [2020-10-14 09:20:33,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:20:33,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:20:33,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:20:33,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:20:33,455 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:20:33,455 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-14 09:20:33,455 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 09:20:33,455 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 399 [2020-10-14 09:20:33,456 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:20:33,456 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:20:33,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:20:33,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 09:20:33,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-10-14 09:20:33,457 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:20:33,652 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-14 09:20:33,652 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:20:33,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:20:33,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:20:33,664 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:20:33,664 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:20:33,664 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:20:33,664 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-14 09:20:33,665 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:20:33,665 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:20:33,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:20:33,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:20:33,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:20:33,665 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:20:33,680 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:20:33,681 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [170937220] [2020-10-14 09:20:33,681 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:20:33,681 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:20:33,682 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588166521] [2020-10-14 09:20:33,682 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:20:33,682 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:20:33,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:20:33,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:20:33,683 INFO L87 Difference]: Start difference. First operand 8754 states and 13361 transitions. Second operand 4 states. [2020-10-14 09:20:33,871 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 171 [2020-10-14 09:20:35,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:20:35,121 INFO L93 Difference]: Finished difference Result 21880 states and 33429 transitions. [2020-10-14 09:20:35,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 09:20:35,121 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 85 [2020-10-14 09:20:35,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:20:35,149 INFO L225 Difference]: With dead ends: 21880 [2020-10-14 09:20:35,149 INFO L226 Difference]: Without dead ends: 13174 [2020-10-14 09:20:35,165 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 09:20:35,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13174 states. [2020-10-14 09:20:35,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13174 to 13172. [2020-10-14 09:20:35,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13172 states. [2020-10-14 09:20:35,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13172 states to 13172 states and 20051 transitions. [2020-10-14 09:20:35,767 INFO L78 Accepts]: Start accepts. Automaton has 13172 states and 20051 transitions. Word has length 85 [2020-10-14 09:20:35,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:20:35,767 INFO L479 AbstractCegarLoop]: Abstraction has 13172 states and 20051 transitions. [2020-10-14 09:20:35,767 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:20:35,767 INFO L276 IsEmpty]: Start isEmpty. Operand 13172 states and 20051 transitions. [2020-10-14 09:20:35,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-10-14 09:20:35,775 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:20:35,775 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1] [2020-10-14 09:20:35,776 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-14 09:20:35,776 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:20:35,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:20:35,776 INFO L82 PathProgramCache]: Analyzing trace with hash -935229747, now seen corresponding path program 1 times [2020-10-14 09:20:35,776 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:20:35,777 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1538373023] [2020-10-14 09:20:35,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:20:35,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:20:35,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:20:36,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:20:36,783 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:20:36,784 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 120 [2020-10-14 09:20:36,784 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 09:20:36,785 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 978 [2020-10-14 09:20:36,785 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:20:36,785 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:20:36,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 09:20:36,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 09:20:36,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 104 [2020-10-14 09:20:36,786 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:20:37,051 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-14 09:20:37,052 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:20:37,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:20:37,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:20:37,064 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:20:37,064 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:20:37,065 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:20:37,065 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-14 09:20:37,065 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:20:37,065 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:20:37,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:20:37,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:20:37,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:20:37,066 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:20:37,109 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-14 09:20:37,109 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1538373023] [2020-10-14 09:20:37,110 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 09:20:37,110 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-14 09:20:37,110 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233917414] [2020-10-14 09:20:37,111 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 09:20:37,111 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:20:37,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 09:20:37,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-14 09:20:37,113 INFO L87 Difference]: Start difference. First operand 13172 states and 20051 transitions. Second operand 5 states. [2020-10-14 09:20:37,378 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification that was a NOOP. DAG size: 177 [2020-10-14 09:20:39,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:20:39,008 INFO L93 Difference]: Finished difference Result 30330 states and 46294 transitions. [2020-10-14 09:20:39,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-14 09:20:39,008 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 114 [2020-10-14 09:20:39,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:20:39,049 INFO L225 Difference]: With dead ends: 30330 [2020-10-14 09:20:39,049 INFO L226 Difference]: Without dead ends: 21624 [2020-10-14 09:20:39,069 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-14 09:20:39,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21624 states. [2020-10-14 09:20:40,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21624 to 21620. [2020-10-14 09:20:40,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21620 states. [2020-10-14 09:20:40,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21620 states to 21620 states and 32851 transitions. [2020-10-14 09:20:40,163 INFO L78 Accepts]: Start accepts. Automaton has 21620 states and 32851 transitions. Word has length 114 [2020-10-14 09:20:40,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:20:40,164 INFO L479 AbstractCegarLoop]: Abstraction has 21620 states and 32851 transitions. [2020-10-14 09:20:40,164 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 09:20:40,164 INFO L276 IsEmpty]: Start isEmpty. Operand 21620 states and 32851 transitions. [2020-10-14 09:20:40,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-10-14 09:20:40,172 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:20:40,173 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] [2020-10-14 09:20:40,173 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-14 09:20:40,173 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:20:40,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:20:40,174 INFO L82 PathProgramCache]: Analyzing trace with hash 1530834419, now seen corresponding path program 1 times [2020-10-14 09:20:40,174 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:20:40,174 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1830419888] [2020-10-14 09:20:40,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:20:40,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:20:40,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:20:40,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:20:40,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:20:40,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:20:42,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:20:45,214 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:20:45,215 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 121 [2020-10-14 09:20:45,215 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 09:20:45,215 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-14 09:20:45,215 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:20:45,215 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:20:45,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:20:45,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 56 [2020-10-14 09:20:45,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-14 09:20:45,216 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:20:45,404 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-14 09:20:45,405 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:20:45,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:20:45,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:20:45,416 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:20:45,416 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:20:45,417 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:20:45,417 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-14 09:20:45,417 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:20:45,417 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:20:45,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:20:45,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:20:45,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:20:45,418 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:20:45,440 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:20:45,441 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1830419888] [2020-10-14 09:20:45,441 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:20:45,441 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:20:45,441 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770308940] [2020-10-14 09:20:45,442 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:20:45,442 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:20:45,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:20:45,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:20:45,443 INFO L87 Difference]: Start difference. First operand 21620 states and 32851 transitions. Second operand 4 states. [2020-10-14 09:20:45,701 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification that was a NOOP. DAG size: 173 [2020-10-14 09:20:47,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:20:47,977 INFO L93 Difference]: Finished difference Result 62776 states and 95253 transitions. [2020-10-14 09:20:47,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 09:20:47,977 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 115 [2020-10-14 09:20:47,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:20:48,060 INFO L225 Difference]: With dead ends: 62776 [2020-10-14 09:20:48,061 INFO L226 Difference]: Without dead ends: 41206 [2020-10-14 09:20:48,098 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 09:20:48,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41206 states. [2020-10-14 09:20:50,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41206 to 41204. [2020-10-14 09:20:50,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41204 states. [2020-10-14 09:20:50,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41204 states to 41204 states and 62131 transitions. [2020-10-14 09:20:50,360 INFO L78 Accepts]: Start accepts. Automaton has 41204 states and 62131 transitions. Word has length 115 [2020-10-14 09:20:50,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:20:50,360 INFO L479 AbstractCegarLoop]: Abstraction has 41204 states and 62131 transitions. [2020-10-14 09:20:50,360 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:20:50,360 INFO L276 IsEmpty]: Start isEmpty. Operand 41204 states and 62131 transitions. [2020-10-14 09:20:50,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-10-14 09:20:50,372 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:20:50,372 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] [2020-10-14 09:20:50,373 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-14 09:20:50,373 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:20:50,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:20:50,373 INFO L82 PathProgramCache]: Analyzing trace with hash 1545929428, now seen corresponding path program 1 times [2020-10-14 09:20:50,373 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:20:50,374 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1071127925] [2020-10-14 09:20:50,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:20:50,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:20:50,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:20:50,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:20:50,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:20:50,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:20:51,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:20:55,403 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:20:55,403 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 121 [2020-10-14 09:20:55,403 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 09:20:55,403 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-14 09:20:55,403 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:20:55,404 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:20:55,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:20:55,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 61 [2020-10-14 09:20:55,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-14 09:20:55,404 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:20:55,591 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-14 09:20:55,592 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:20:55,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:20:55,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:20:55,601 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:20:55,601 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:20:55,601 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:20:55,601 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-14 09:20:55,601 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:20:55,602 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:20:55,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:20:55,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:20:55,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:20:55,602 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:20:55,619 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:20:55,620 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1071127925] [2020-10-14 09:20:55,620 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:20:55,620 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:20:55,620 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550398965] [2020-10-14 09:20:55,621 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:20:55,621 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:20:55,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:20:55,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:20:55,621 INFO L87 Difference]: Start difference. First operand 41204 states and 62131 transitions. Second operand 4 states. [2020-10-14 09:20:55,821 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 173 [2020-10-14 09:20:59,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:20:59,863 INFO L93 Difference]: Finished difference Result 119992 states and 180533 transitions. [2020-10-14 09:20:59,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 09:20:59,864 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 115 [2020-10-14 09:20:59,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:20:59,974 INFO L225 Difference]: With dead ends: 119992 [2020-10-14 09:20:59,974 INFO L226 Difference]: Without dead ends: 78838 [2020-10-14 09:21:00,023 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 09:21:00,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78838 states. [2020-10-14 09:21:03,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78838 to 78836. [2020-10-14 09:21:03,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78836 states. [2020-10-14 09:21:03,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78836 states to 78836 states and 117811 transitions. [2020-10-14 09:21:03,933 INFO L78 Accepts]: Start accepts. Automaton has 78836 states and 117811 transitions. Word has length 115 [2020-10-14 09:21:03,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:21:03,933 INFO L479 AbstractCegarLoop]: Abstraction has 78836 states and 117811 transitions. [2020-10-14 09:21:03,933 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:21:03,934 INFO L276 IsEmpty]: Start isEmpty. Operand 78836 states and 117811 transitions. [2020-10-14 09:21:03,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-10-14 09:21:03,951 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:21:03,951 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] [2020-10-14 09:21:03,951 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-14 09:21:03,951 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:21:03,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:21:03,952 INFO L82 PathProgramCache]: Analyzing trace with hash 940216799, now seen corresponding path program 1 times [2020-10-14 09:21:03,952 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:21:03,952 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [135966910] [2020-10-14 09:21:03,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:21:03,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:21:03,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:21:04,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:21:04,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:21:04,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:21:06,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:21:08,978 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:21:08,978 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 121 [2020-10-14 09:21:08,978 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 09:21:08,978 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-14 09:21:08,978 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:21:08,978 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:21:08,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:21:08,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 66 [2020-10-14 09:21:08,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-14 09:21:08,979 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:21:09,173 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-14 09:21:09,174 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:21:09,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:21:09,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:21:09,187 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:21:09,188 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:21:09,188 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:21:09,188 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-14 09:21:09,188 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:21:09,188 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:21:09,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:21:09,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:21:09,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:21:09,189 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:21:09,204 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:21:09,204 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [135966910] [2020-10-14 09:21:09,204 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:21:09,204 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:21:09,205 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759553933] [2020-10-14 09:21:09,205 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:21:09,205 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:21:09,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:21:09,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:21:09,206 INFO L87 Difference]: Start difference. First operand 78836 states and 117811 transitions. Second operand 4 states. [2020-10-14 09:21:09,401 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 173 [2020-10-14 09:21:16,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:21:16,859 INFO L93 Difference]: Finished difference Result 229368 states and 341813 transitions. [2020-10-14 09:21:16,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 09:21:16,860 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 115 [2020-10-14 09:21:16,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:21:17,067 INFO L225 Difference]: With dead ends: 229368 [2020-10-14 09:21:17,068 INFO L226 Difference]: Without dead ends: 150582 [2020-10-14 09:21:17,161 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 09:21:17,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150582 states. [2020-10-14 09:21:26,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150582 to 150580. [2020-10-14 09:21:26,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150580 states. [2020-10-14 09:21:27,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150580 states to 150580 states and 222771 transitions. [2020-10-14 09:21:27,105 INFO L78 Accepts]: Start accepts. Automaton has 150580 states and 222771 transitions. Word has length 115 [2020-10-14 09:21:27,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:21:27,106 INFO L479 AbstractCegarLoop]: Abstraction has 150580 states and 222771 transitions. [2020-10-14 09:21:27,106 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:21:27,106 INFO L276 IsEmpty]: Start isEmpty. Operand 150580 states and 222771 transitions. [2020-10-14 09:21:27,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-10-14 09:21:27,134 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:21:27,135 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] [2020-10-14 09:21:27,135 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-14 09:21:27,135 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:21:27,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:21:27,136 INFO L82 PathProgramCache]: Analyzing trace with hash 46032148, now seen corresponding path program 1 times [2020-10-14 09:21:27,136 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:21:27,136 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [885231529] [2020-10-14 09:21:27,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:21:27,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:21:27,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:21:27,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:21:27,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:21:27,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:21:28,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:21:32,169 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:21:32,169 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 121 [2020-10-14 09:21:32,170 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 09:21:32,170 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-14 09:21:32,170 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:21:32,170 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:21:32,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:21:32,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 71 [2020-10-14 09:21:32,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-14 09:21:32,170 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:21:32,357 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-14 09:21:32,358 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:21:32,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:21:32,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:21:32,369 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:21:32,369 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:21:32,369 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:21:32,369 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-14 09:21:32,369 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:21:32,370 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:21:32,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:21:32,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:21:32,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:21:32,370 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:21:32,383 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:21:32,384 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [885231529] [2020-10-14 09:21:32,384 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:21:32,384 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:21:32,384 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864772015] [2020-10-14 09:21:32,385 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:21:32,385 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:21:32,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:21:32,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:21:32,385 INFO L87 Difference]: Start difference. First operand 150580 states and 222771 transitions. Second operand 4 states. [2020-10-14 09:21:32,576 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 173 [2020-10-14 09:21:47,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:21:47,504 INFO L93 Difference]: Finished difference Result 437560 states and 645173 transitions. [2020-10-14 09:21:47,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 09:21:47,505 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 115 [2020-10-14 09:21:47,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:21:47,908 INFO L225 Difference]: With dead ends: 437560 [2020-10-14 09:21:47,908 INFO L226 Difference]: Without dead ends: 287030 [2020-10-14 09:21:48,025 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 09:21:48,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287030 states. [2020-10-14 09:22:06,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287030 to 287028. [2020-10-14 09:22:06,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 287028 states. [2020-10-14 09:22:06,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287028 states to 287028 states and 419891 transitions. [2020-10-14 09:22:06,849 INFO L78 Accepts]: Start accepts. Automaton has 287028 states and 419891 transitions. Word has length 115 [2020-10-14 09:22:06,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:22:06,849 INFO L479 AbstractCegarLoop]: Abstraction has 287028 states and 419891 transitions. [2020-10-14 09:22:06,849 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:22:06,849 INFO L276 IsEmpty]: Start isEmpty. Operand 287028 states and 419891 transitions. [2020-10-14 09:22:06,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-10-14 09:22:06,880 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:22:06,880 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] [2020-10-14 09:22:06,880 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-14 09:22:06,880 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:22:06,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:22:06,881 INFO L82 PathProgramCache]: Analyzing trace with hash -1432418701, now seen corresponding path program 1 times [2020-10-14 09:22:06,881 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:22:06,881 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1983180392] [2020-10-14 09:22:06,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:22:06,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:22:06,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:22:06,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:22:07,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:22:07,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:22:07,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:22:11,909 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:22:11,910 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 121 [2020-10-14 09:22:11,910 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 09:22:11,910 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-14 09:22:11,910 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:22:11,910 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:22:11,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:22:11,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 76 [2020-10-14 09:22:11,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-14 09:22:11,911 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:22:12,097 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-14 09:22:12,098 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:22:12,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:22:12,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:22:12,108 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:22:12,109 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:22:12,109 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:22:12,109 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-14 09:22:12,109 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:22:12,109 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:22:12,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:22:12,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:22:12,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:22:12,110 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:22:12,123 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:22:12,124 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1983180392] [2020-10-14 09:22:12,124 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:22:12,124 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:22:12,124 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208042931] [2020-10-14 09:22:12,124 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:22:12,124 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:22:12,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:22:12,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:22:12,125 INFO L87 Difference]: Start difference. First operand 287028 states and 419891 transitions. Second operand 4 states. [2020-10-14 09:22:12,328 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 173 [2020-10-14 09:22:46,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:22:46,481 INFO L93 Difference]: Finished difference Result 832824 states and 1213493 transitions. [2020-10-14 09:22:46,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 09:22:46,481 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 115 [2020-10-14 09:22:46,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:22:47,218 INFO L225 Difference]: With dead ends: 832824 [2020-10-14 09:22:47,218 INFO L226 Difference]: Without dead ends: 545846 [2020-10-14 09:22:47,422 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 09:22:47,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 545846 states.