/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.4 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.6.ufo.BOUNDED-12.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-14 08:53:51,154 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-14 08:53:51,157 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-14 08:53:51,199 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-14 08:53:51,199 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-14 08:53:51,210 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-14 08:53:51,212 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-14 08:53:51,216 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-14 08:53:51,218 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-14 08:53:51,220 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-14 08:53:51,221 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-14 08:53:51,223 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-14 08:53:51,224 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-14 08:53:51,227 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-14 08:53:51,229 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-14 08:53:51,231 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-14 08:53:51,232 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-14 08:53:51,233 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-14 08:53:51,234 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-14 08:53:51,240 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-14 08:53:51,242 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-14 08:53:51,244 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-14 08:53:51,245 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-14 08:53:51,245 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-14 08:53:51,250 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-14 08:53:51,250 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-14 08:53:51,250 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-14 08:53:51,253 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-14 08:53:51,254 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-14 08:53:51,255 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-14 08:53:51,255 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-14 08:53:51,256 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-14 08:53:51,256 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-14 08:53:51,257 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-14 08:53:51,258 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-14 08:53:51,259 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-14 08:53:51,259 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-14 08:53:51,259 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-14 08:53:51,260 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-14 08:53:51,261 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-14 08:53:51,262 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-14 08:53:51,263 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-14 08:53:51,304 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-14 08:53:51,304 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-14 08:53:51,306 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-14 08:53:51,307 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-14 08:53:51,307 INFO L138 SettingsManager]: * Use SBE=true [2020-10-14 08:53:51,307 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-14 08:53:51,308 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-14 08:53:51,308 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-14 08:53:51,308 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-14 08:53:51,308 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-14 08:53:51,309 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-14 08:53:51,310 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-14 08:53:51,310 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-14 08:53:51,310 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-14 08:53:51,310 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-14 08:53:51,311 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-14 08:53:51,311 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-14 08:53:51,311 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-14 08:53:51,311 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-14 08:53:51,312 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-14 08:53:51,312 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-14 08:53:51,312 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 08:53:51,312 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-14 08:53:51,312 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-14 08:53:51,313 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-14 08:53:51,313 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-14 08:53:51,313 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-14 08:53:51,313 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-14 08:53:51,313 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-14 08:53:51,314 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; [2020-10-14 08:53:51,621 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-14 08:53:51,633 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-14 08:53:51,637 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-14 08:53:51,639 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-14 08:53:51,639 INFO L275 PluginConnector]: CDTParser initialized [2020-10-14 08:53:51,640 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.6.ufo.BOUNDED-12.pals.c.v+cfa-reducer.c [2020-10-14 08:53:51,702 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a3e1578c4/67e24e3486af47af975615c9e5c9cca7/FLAGf46a97165 [2020-10-14 08:53:52,263 INFO L306 CDTParser]: Found 1 translation units. [2020-10-14 08:53:52,266 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.6.ufo.BOUNDED-12.pals.c.v+cfa-reducer.c [2020-10-14 08:53:52,283 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a3e1578c4/67e24e3486af47af975615c9e5c9cca7/FLAGf46a97165 [2020-10-14 08:53:52,528 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a3e1578c4/67e24e3486af47af975615c9e5c9cca7 [2020-10-14 08:53:52,541 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-14 08:53:52,543 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-14 08:53:52,547 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-14 08:53:52,547 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-14 08:53:52,551 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-14 08:53:52,552 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 08:53:52" (1/1) ... [2020-10-14 08:53:52,558 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@87e9861 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 08:53:52, skipping insertion in model container [2020-10-14 08:53:52,558 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 08:53:52" (1/1) ... [2020-10-14 08:53:52,568 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-14 08:53:52,629 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-14 08:53:52,895 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 08:53:52,911 INFO L203 MainTranslator]: Completed pre-run [2020-10-14 08:53:53,095 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 08:53:53,120 INFO L208 MainTranslator]: Completed translation [2020-10-14 08:53:53,120 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 08:53:53 WrapperNode [2020-10-14 08:53:53,120 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-14 08:53:53,121 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-14 08:53:53,121 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-14 08:53:53,121 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-14 08:53:53,133 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 08:53:53" (1/1) ... [2020-10-14 08:53:53,133 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 08:53:53" (1/1) ... [2020-10-14 08:53:53,145 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 08:53:53" (1/1) ... [2020-10-14 08:53:53,146 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 08:53:53" (1/1) ... [2020-10-14 08:53:53,160 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 08:53:53" (1/1) ... [2020-10-14 08:53:53,170 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 08:53:53" (1/1) ... [2020-10-14 08:53:53,174 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 08:53:53" (1/1) ... [2020-10-14 08:53:53,179 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-14 08:53:53,180 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-14 08:53:53,180 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-14 08:53:53,180 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-14 08:53:53,181 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 08:53:53" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 08:53:53,245 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-14 08:53:53,245 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-14 08:53:53,245 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-14 08:53:53,245 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-14 08:53:53,245 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-14 08:53:53,246 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-14 08:53:53,246 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-14 08:53:53,246 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-14 08:53:53,246 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-14 08:53:53,246 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-14 08:53:53,246 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-14 08:53:53,247 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-14 08:53:53,247 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-14 08:53:53,247 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-14 08:53:53,247 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-14 08:53:53,247 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-14 08:53:53,247 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-10-14 08:53:53,248 INFO L130 BoogieDeclarations]: Found specification of procedure node6 [2020-10-14 08:53:53,248 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-14 08:53:53,248 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-14 08:53:53,248 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-14 08:53:53,248 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-14 08:53:53,248 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-14 08:53:53,938 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-14 08:53:53,939 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-14 08:53:53,945 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 08:53:53 BoogieIcfgContainer [2020-10-14 08:53:53,946 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-14 08:53:53,951 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-14 08:53:53,952 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-14 08:53:53,955 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-14 08:53:53,956 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 08:53:52" (1/3) ... [2020-10-14 08:53:53,957 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d6920a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 08:53:53, skipping insertion in model container [2020-10-14 08:53:53,957 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 08:53:53" (2/3) ... [2020-10-14 08:53:53,958 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d6920a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 08:53:53, skipping insertion in model container [2020-10-14 08:53:53,958 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 08:53:53" (3/3) ... [2020-10-14 08:53:53,960 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_lcr.6.ufo.BOUNDED-12.pals.c.v+cfa-reducer.c [2020-10-14 08:53:53,972 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-14 08:53:53,990 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-14 08:53:54,006 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-14 08:53:54,043 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-14 08:53:54,043 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-14 08:53:54,043 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-14 08:53:54,044 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-14 08:53:54,044 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-14 08:53:54,044 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-14 08:53:54,045 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-14 08:53:54,045 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-14 08:53:54,077 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states. [2020-10-14 08:53:54,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-14 08:53:54,094 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:53:54,096 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] [2020-10-14 08:53:54,097 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:53:54,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:53:54,105 INFO L82 PathProgramCache]: Analyzing trace with hash -1263319593, now seen corresponding path program 1 times [2020-10-14 08:53:54,114 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:53:54,115 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [182258648] [2020-10-14 08:53:54,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:53:54,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:53:54,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:53:54,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:53:54,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:53:55,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:53:55,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:53:56,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:53:56,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:53:59,461 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:53:59,462 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-14 08:53:59,462 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 08:53:59,462 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5020 [2020-10-14 08:53:59,466 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:53:59,466 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:53:59,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 08:53:59,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-14 08:53:59,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-14 08:53:59,468 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-14 08:53:59,808 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-14 08:53:59,811 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:53:59,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:53:59,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:53:59,849 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:53:59,849 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:53:59,850 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:53:59,850 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-14 08:53:59,850 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:53:59,850 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:53:59,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:53:59,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:53:59,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:53:59,852 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 08:53:59,905 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 08:53:59,906 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [182258648] [2020-10-14 08:53:59,909 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:53:59,911 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 08:53:59,912 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661785479] [2020-10-14 08:53:59,920 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 08:53:59,921 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:53:59,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 08:53:59,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 08:53:59,946 INFO L87 Difference]: Start difference. First operand 121 states. Second operand 4 states. [2020-10-14 08:54:00,318 WARN L193 SmtUtils]: Spent 273.00 ms on a formula simplification that was a NOOP. DAG size: 155 [2020-10-14 08:54:01,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:54:01,247 INFO L93 Difference]: Finished difference Result 261 states and 423 transitions. [2020-10-14 08:54:01,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 08:54:01,249 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 76 [2020-10-14 08:54:01,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:54:01,264 INFO L225 Difference]: With dead ends: 261 [2020-10-14 08:54:01,264 INFO L226 Difference]: Without dead ends: 179 [2020-10-14 08:54:01,268 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 08:54:01,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2020-10-14 08:54:01,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 177. [2020-10-14 08:54:01,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2020-10-14 08:54:01,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 254 transitions. [2020-10-14 08:54:01,335 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 254 transitions. Word has length 76 [2020-10-14 08:54:01,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:54:01,336 INFO L479 AbstractCegarLoop]: Abstraction has 177 states and 254 transitions. [2020-10-14 08:54:01,336 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 08:54:01,336 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 254 transitions. [2020-10-14 08:54:01,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-14 08:54:01,339 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:54:01,340 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 08:54:01,340 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-14 08:54:01,340 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:54:01,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:54:01,341 INFO L82 PathProgramCache]: Analyzing trace with hash -464852991, now seen corresponding path program 1 times [2020-10-14 08:54:01,341 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:54:01,341 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1015450900] [2020-10-14 08:54:01,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:54:01,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:54:01,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:54:01,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:54:01,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:54:01,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:54:02,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:54:02,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:54:06,391 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:54:06,392 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-14 08:54:06,392 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 08:54:06,392 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-14 08:54:06,393 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:54:06,393 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:54:06,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 08:54:06,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-14 08:54:06,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-14 08:54:06,394 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 08:54:06,627 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-14 08:54:06,628 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:54:06,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:54:06,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:54:06,647 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:54:06,647 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:54:06,647 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:54:06,648 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-14 08:54:06,648 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:54:06,648 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:54:06,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:54:06,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:54:06,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:54:06,649 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 08:54:06,670 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 08:54:06,670 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1015450900] [2020-10-14 08:54:06,671 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:54:06,671 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 08:54:06,671 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919489298] [2020-10-14 08:54:06,673 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 08:54:06,673 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:54:06,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 08:54:06,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 08:54:06,674 INFO L87 Difference]: Start difference. First operand 177 states and 254 transitions. Second operand 4 states. [2020-10-14 08:54:06,868 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 155 [2020-10-14 08:54:07,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:54:07,422 INFO L93 Difference]: Finished difference Result 421 states and 642 transitions. [2020-10-14 08:54:07,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 08:54:07,423 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 77 [2020-10-14 08:54:07,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:54:07,426 INFO L225 Difference]: With dead ends: 421 [2020-10-14 08:54:07,426 INFO L226 Difference]: Without dead ends: 291 [2020-10-14 08:54:07,428 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 08:54:07,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2020-10-14 08:54:07,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 289. [2020-10-14 08:54:07,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 289 states. [2020-10-14 08:54:07,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 432 transitions. [2020-10-14 08:54:07,455 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 432 transitions. Word has length 77 [2020-10-14 08:54:07,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:54:07,456 INFO L479 AbstractCegarLoop]: Abstraction has 289 states and 432 transitions. [2020-10-14 08:54:07,456 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 08:54:07,456 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 432 transitions. [2020-10-14 08:54:07,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-14 08:54:07,459 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:54:07,459 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 08:54:07,459 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-14 08:54:07,459 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:54:07,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:54:07,460 INFO L82 PathProgramCache]: Analyzing trace with hash 390488209, now seen corresponding path program 1 times [2020-10-14 08:54:07,460 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:54:07,460 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [355216287] [2020-10-14 08:54:07,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:54:07,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:54:07,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:54:07,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:54:07,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:54:07,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:54:08,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:54:08,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:54:12,494 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:54:12,494 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-14 08:54:12,495 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 08:54:12,495 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-14 08:54:12,495 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:54:12,496 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:54:12,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 08:54:12,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 32 [2020-10-14 08:54:12,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-14 08:54:12,497 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 08:54:12,700 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-14 08:54:12,700 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:54:12,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:54:12,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:54:12,716 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:54:12,717 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:54:12,717 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:54:12,717 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-14 08:54:12,717 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:54:12,718 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:54:12,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:54:12,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:54:12,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:54:12,719 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 08:54:12,737 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 08:54:12,738 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [355216287] [2020-10-14 08:54:12,738 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:54:12,738 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 08:54:12,739 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936154223] [2020-10-14 08:54:12,739 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 08:54:12,740 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:54:12,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 08:54:12,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 08:54:12,740 INFO L87 Difference]: Start difference. First operand 289 states and 432 transitions. Second operand 4 states. [2020-10-14 08:54:12,936 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 155 [2020-10-14 08:54:13,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:54:13,544 INFO L93 Difference]: Finished difference Result 741 states and 1150 transitions. [2020-10-14 08:54:13,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 08:54:13,545 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 78 [2020-10-14 08:54:13,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:54:13,555 INFO L225 Difference]: With dead ends: 741 [2020-10-14 08:54:13,555 INFO L226 Difference]: Without dead ends: 499 [2020-10-14 08:54:13,559 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 08:54:13,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 499 states. [2020-10-14 08:54:13,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 499 to 497. [2020-10-14 08:54:13,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 497 states. [2020-10-14 08:54:13,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 497 states to 497 states and 760 transitions. [2020-10-14 08:54:13,599 INFO L78 Accepts]: Start accepts. Automaton has 497 states and 760 transitions. Word has length 78 [2020-10-14 08:54:13,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:54:13,599 INFO L479 AbstractCegarLoop]: Abstraction has 497 states and 760 transitions. [2020-10-14 08:54:13,600 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 08:54:13,600 INFO L276 IsEmpty]: Start isEmpty. Operand 497 states and 760 transitions. [2020-10-14 08:54:13,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-14 08:54:13,603 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:54:13,603 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 08:54:13,603 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-14 08:54:13,603 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:54:13,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:54:13,604 INFO L82 PathProgramCache]: Analyzing trace with hash 1003113998, now seen corresponding path program 1 times [2020-10-14 08:54:13,604 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:54:13,604 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [854007798] [2020-10-14 08:54:13,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:54:13,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:54:13,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:54:13,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:54:13,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:54:13,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:54:14,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:54:15,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:54:15,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:54:18,650 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:54:18,651 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-14 08:54:18,651 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 08:54:18,651 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5020 [2020-10-14 08:54:18,651 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:54:18,652 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:54:18,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 08:54:18,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 36 [2020-10-14 08:54:18,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-14 08:54:18,669 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 18 [2020-10-14 08:54:18,912 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-14 08:54:18,914 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:54:18,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:54:18,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:54:18,944 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:54:18,944 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:54:18,945 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:54:18,945 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-14 08:54:18,945 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:54:18,945 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:54:18,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:54:18,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:54:18,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:54:18,946 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 08:54:18,986 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 08:54:18,989 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [854007798] [2020-10-14 08:54:18,991 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:54:18,991 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 08:54:18,992 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085395879] [2020-10-14 08:54:18,995 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 08:54:18,996 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:54:18,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 08:54:18,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 08:54:18,997 INFO L87 Difference]: Start difference. First operand 497 states and 760 transitions. Second operand 4 states. [2020-10-14 08:54:19,278 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification that was a NOOP. DAG size: 155 [2020-10-14 08:54:19,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:54:19,938 INFO L93 Difference]: Finished difference Result 1333 states and 2082 transitions. [2020-10-14 08:54:19,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 08:54:19,939 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 79 [2020-10-14 08:54:19,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:54:19,949 INFO L225 Difference]: With dead ends: 1333 [2020-10-14 08:54:19,949 INFO L226 Difference]: Without dead ends: 883 [2020-10-14 08:54:19,960 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 08:54:19,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 883 states. [2020-10-14 08:54:20,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 883 to 881. [2020-10-14 08:54:20,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 881 states. [2020-10-14 08:54:20,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 881 states to 881 states and 1360 transitions. [2020-10-14 08:54:20,033 INFO L78 Accepts]: Start accepts. Automaton has 881 states and 1360 transitions. Word has length 79 [2020-10-14 08:54:20,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:54:20,036 INFO L479 AbstractCegarLoop]: Abstraction has 881 states and 1360 transitions. [2020-10-14 08:54:20,036 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 08:54:20,036 INFO L276 IsEmpty]: Start isEmpty. Operand 881 states and 1360 transitions. [2020-10-14 08:54:20,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-14 08:54:20,048 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:54:20,048 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 08:54:20,048 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-14 08:54:20,049 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:54:20,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:54:20,049 INFO L82 PathProgramCache]: Analyzing trace with hash 535917130, now seen corresponding path program 1 times [2020-10-14 08:54:20,049 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:54:20,050 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [945573842] [2020-10-14 08:54:20,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:54:20,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:54:20,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:54:20,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:54:20,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:54:20,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:54:20,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:54:22,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:54:22,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:54:22,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:54:22,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:54:25,092 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:54:25,092 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-14 08:54:25,092 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-14 08:54:25,093 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-14 08:54:25,093 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:54:25,093 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:54:25,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 08:54:25,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-14 08:54:25,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-14 08:54:25,094 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:54:25,343 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-14 08:54:25,344 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:54:25,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:54:25,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:54:25,364 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:54:25,365 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:54:25,365 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:54:25,366 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-14 08:54:25,366 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:54:25,366 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:54:25,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:54:25,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:54:25,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:54:25,368 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 08:54:25,399 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 08:54:25,400 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [945573842] [2020-10-14 08:54:25,400 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:54:25,400 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 08:54:25,401 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246064351] [2020-10-14 08:54:25,402 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 08:54:25,403 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:54:25,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 08:54:25,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 08:54:25,404 INFO L87 Difference]: Start difference. First operand 881 states and 1360 transitions. Second operand 4 states. [2020-10-14 08:54:25,670 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification that was a NOOP. DAG size: 155 [2020-10-14 08:54:26,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:54:26,383 INFO L93 Difference]: Finished difference Result 2421 states and 3778 transitions. [2020-10-14 08:54:26,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 08:54:26,387 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 80 [2020-10-14 08:54:26,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:54:26,398 INFO L225 Difference]: With dead ends: 2421 [2020-10-14 08:54:26,398 INFO L226 Difference]: Without dead ends: 1587 [2020-10-14 08:54:26,401 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 08:54:26,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1587 states. [2020-10-14 08:54:26,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1587 to 1585. [2020-10-14 08:54:26,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1585 states. [2020-10-14 08:54:26,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1585 states to 1585 states and 2448 transitions. [2020-10-14 08:54:26,500 INFO L78 Accepts]: Start accepts. Automaton has 1585 states and 2448 transitions. Word has length 80 [2020-10-14 08:54:26,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:54:26,502 INFO L479 AbstractCegarLoop]: Abstraction has 1585 states and 2448 transitions. [2020-10-14 08:54:26,502 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 08:54:26,502 INFO L276 IsEmpty]: Start isEmpty. Operand 1585 states and 2448 transitions. [2020-10-14 08:54:26,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-14 08:54:26,505 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:54:26,507 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 08:54:26,507 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-14 08:54:26,507 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:54:26,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:54:26,508 INFO L82 PathProgramCache]: Analyzing trace with hash 63576022, now seen corresponding path program 1 times [2020-10-14 08:54:26,508 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:54:26,508 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1461906046] [2020-10-14 08:54:26,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:54:26,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:54:26,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:54:26,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:54:26,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:54:26,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:54:27,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:54:27,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:54:27,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:54:27,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:54:31,531 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:54:31,532 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-14 08:54:31,532 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-14 08:54:31,532 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-14 08:54:31,532 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:54:31,532 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:54:31,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 08:54:31,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-14 08:54:31,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-14 08:54:31,533 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:54:31,739 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-14 08:54:31,740 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:54:31,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:54:31,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:54:31,756 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:54:31,757 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:54:31,757 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:54:31,757 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-14 08:54:31,758 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:54:31,758 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:54:31,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:54:31,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:54:31,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:54:31,759 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 08:54:31,778 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 08:54:31,779 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1461906046] [2020-10-14 08:54:31,780 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:54:31,780 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 08:54:31,780 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472813720] [2020-10-14 08:54:31,781 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 08:54:31,781 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:54:31,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 08:54:31,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 08:54:31,782 INFO L87 Difference]: Start difference. First operand 1585 states and 2448 transitions. Second operand 4 states. [2020-10-14 08:54:31,964 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 155 [2020-10-14 08:54:32,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:54:32,627 INFO L93 Difference]: Finished difference Result 4405 states and 6834 transitions. [2020-10-14 08:54:32,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 08:54:32,627 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 81 [2020-10-14 08:54:32,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:54:32,641 INFO L225 Difference]: With dead ends: 4405 [2020-10-14 08:54:32,642 INFO L226 Difference]: Without dead ends: 2867 [2020-10-14 08:54:32,645 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 08:54:32,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2867 states. [2020-10-14 08:54:32,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2867 to 2865. [2020-10-14 08:54:32,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2865 states. [2020-10-14 08:54:32,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2865 states to 2865 states and 4400 transitions. [2020-10-14 08:54:32,784 INFO L78 Accepts]: Start accepts. Automaton has 2865 states and 4400 transitions. Word has length 81 [2020-10-14 08:54:32,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:54:32,784 INFO L479 AbstractCegarLoop]: Abstraction has 2865 states and 4400 transitions. [2020-10-14 08:54:32,784 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 08:54:32,784 INFO L276 IsEmpty]: Start isEmpty. Operand 2865 states and 4400 transitions. [2020-10-14 08:54:32,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-14 08:54:32,785 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:54:32,786 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 08:54:32,786 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-14 08:54:32,786 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:54:32,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:54:32,787 INFO L82 PathProgramCache]: Analyzing trace with hash -2026633872, now seen corresponding path program 1 times [2020-10-14 08:54:32,787 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:54:32,788 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1831711184] [2020-10-14 08:54:32,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:54:32,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:54:32,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:54:32,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:54:32,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:54:33,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:54:33,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:54:33,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:54:34,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:54:34,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:54:34,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:54:34,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:54:34,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:54:37,816 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:54:37,816 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-14 08:54:37,816 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-14 08:54:37,817 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-14 08:54:37,817 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:54:37,817 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:54:37,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 08:54:37,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-14 08:54:37,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-14 08:54:37,817 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:54:38,034 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-14 08:54:38,035 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:54:38,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:54:38,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:54:38,059 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:54:38,059 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:54:38,060 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:54:38,060 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-14 08:54:38,060 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:54:38,060 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:54:38,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 08:54:38,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:54:38,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 08:54:38,061 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 08:54:38,083 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 08:54:38,083 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1831711184] [2020-10-14 08:54:38,084 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:54:38,084 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-14 08:54:38,084 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249176257] [2020-10-14 08:54:38,085 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 08:54:38,085 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:54:38,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 08:54:38,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-14 08:54:38,086 INFO L87 Difference]: Start difference. First operand 2865 states and 4400 transitions. Second operand 6 states. [2020-10-14 08:54:38,283 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-14 08:54:39,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:54:39,017 INFO L93 Difference]: Finished difference Result 8469 states and 13042 transitions. [2020-10-14 08:54:39,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-14 08:54:39,018 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 82 [2020-10-14 08:54:39,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:54:39,050 INFO L225 Difference]: With dead ends: 8469 [2020-10-14 08:54:39,050 INFO L226 Difference]: Without dead ends: 5651 [2020-10-14 08:54:39,062 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-14 08:54:39,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5651 states. [2020-10-14 08:54:39,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5651 to 5649. [2020-10-14 08:54:39,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5649 states. [2020-10-14 08:54:39,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5649 states to 5649 states and 8656 transitions. [2020-10-14 08:54:39,417 INFO L78 Accepts]: Start accepts. Automaton has 5649 states and 8656 transitions. Word has length 82 [2020-10-14 08:54:39,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:54:39,417 INFO L479 AbstractCegarLoop]: Abstraction has 5649 states and 8656 transitions. [2020-10-14 08:54:39,418 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 08:54:39,418 INFO L276 IsEmpty]: Start isEmpty. Operand 5649 states and 8656 transitions. [2020-10-14 08:54:39,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-14 08:54:39,419 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:54:39,419 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 08:54:39,419 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-14 08:54:39,419 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:54:39,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:54:39,420 INFO L82 PathProgramCache]: Analyzing trace with hash -752765867, now seen corresponding path program 1 times [2020-10-14 08:54:39,420 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:54:39,420 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [892989365] [2020-10-14 08:54:39,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:54:39,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:54:39,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:54:39,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:54:39,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:54:39,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:54:39,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:54:40,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:54:41,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:54:44,445 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:54:44,445 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-14 08:54:44,445 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 08:54:44,446 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-14 08:54:44,446 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:54:44,446 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:54:44,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 08:54:44,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-14 08:54:44,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-14 08:54:44,447 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 08:54:44,667 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-14 08:54:44,668 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:54:44,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:54:44,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:54:44,697 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:54:44,697 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:54:44,697 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:54:44,697 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-14 08:54:44,698 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:54:44,698 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:54:44,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 08:54:44,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:54:44,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 08:54:44,698 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:54:44,719 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 08:54:44,725 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [892989365] [2020-10-14 08:54:44,725 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:54:44,726 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-14 08:54:44,726 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249104146] [2020-10-14 08:54:44,726 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 08:54:44,726 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:54:44,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 08:54:44,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-14 08:54:44,727 INFO L87 Difference]: Start difference. First operand 5649 states and 8656 transitions. Second operand 6 states. [2020-10-14 08:54:44,948 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-14 08:54:45,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:54:45,874 INFO L93 Difference]: Finished difference Result 16789 states and 25746 transitions. [2020-10-14 08:54:45,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-14 08:54:45,880 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 82 [2020-10-14 08:54:45,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:54:45,943 INFO L225 Difference]: With dead ends: 16789 [2020-10-14 08:54:45,943 INFO L226 Difference]: Without dead ends: 11187 [2020-10-14 08:54:45,964 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-10-14 08:54:45,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11187 states. [2020-10-14 08:54:46,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11187 to 11185. [2020-10-14 08:54:46,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11185 states. [2020-10-14 08:54:46,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11185 states to 11185 states and 17072 transitions. [2020-10-14 08:54:46,639 INFO L78 Accepts]: Start accepts. Automaton has 11185 states and 17072 transitions. Word has length 82 [2020-10-14 08:54:46,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:54:46,639 INFO L479 AbstractCegarLoop]: Abstraction has 11185 states and 17072 transitions. [2020-10-14 08:54:46,639 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 08:54:46,639 INFO L276 IsEmpty]: Start isEmpty. Operand 11185 states and 17072 transitions. [2020-10-14 08:54:46,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-14 08:54:46,640 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:54:46,640 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 08:54:46,641 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-14 08:54:46,641 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:54:46,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:54:46,641 INFO L82 PathProgramCache]: Analyzing trace with hash 1700170896, now seen corresponding path program 1 times [2020-10-14 08:54:46,642 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:54:46,642 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2067156607] [2020-10-14 08:54:46,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:54:46,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:54:46,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:54:46,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:54:46,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:54:47,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:54:48,894 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:54:48,894 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-14 08:54:48,895 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 08:54:48,895 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2228 [2020-10-14 08:54:48,895 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:54:48,895 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:54:48,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 08:54:48,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-14 08:54:48,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-14 08:54:48,895 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:54:49,079 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-14 08:54:49,080 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:54:49,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:54:49,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:54:49,101 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:54:49,101 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:54:49,102 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:54:49,102 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-14 08:54:49,102 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:54:49,102 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:54:49,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 08:54:49,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:54:49,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 08:54:49,103 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:54:49,115 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 08:54:49,115 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2067156607] [2020-10-14 08:54:49,116 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:54:49,116 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-14 08:54:49,116 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899118401] [2020-10-14 08:54:49,116 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 08:54:49,117 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:54:49,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 08:54:49,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-14 08:54:49,117 INFO L87 Difference]: Start difference. First operand 11185 states and 17072 transitions. Second operand 6 states. [2020-10-14 08:54:49,299 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-14 08:54:50,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:54:50,486 INFO L93 Difference]: Finished difference Result 33333 states and 50866 transitions. [2020-10-14 08:54:50,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-14 08:54:50,487 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 82 [2020-10-14 08:54:50,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:54:50,570 INFO L225 Difference]: With dead ends: 33333 [2020-10-14 08:54:50,571 INFO L226 Difference]: Without dead ends: 22195 [2020-10-14 08:54:50,600 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-14 08:54:50,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22195 states. [2020-10-14 08:54:52,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22195 to 22193. [2020-10-14 08:54:52,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22193 states. [2020-10-14 08:54:52,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22193 states to 22193 states and 33712 transitions. [2020-10-14 08:54:52,284 INFO L78 Accepts]: Start accepts. Automaton has 22193 states and 33712 transitions. Word has length 82 [2020-10-14 08:54:52,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:54:52,284 INFO L479 AbstractCegarLoop]: Abstraction has 22193 states and 33712 transitions. [2020-10-14 08:54:52,284 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 08:54:52,285 INFO L276 IsEmpty]: Start isEmpty. Operand 22193 states and 33712 transitions. [2020-10-14 08:54:52,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-14 08:54:52,285 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:54:52,286 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 08:54:52,286 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-14 08:54:52,286 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:54:52,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:54:52,286 INFO L82 PathProgramCache]: Analyzing trace with hash 253141301, now seen corresponding path program 1 times [2020-10-14 08:54:52,287 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:54:52,287 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [68044681] [2020-10-14 08:54:52,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:54:52,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:54:52,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:54:52,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:54:52,830 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:54:52,830 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-14 08:54:52,830 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 08:54:52,830 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 523 [2020-10-14 08:54:52,830 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:54:52,831 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:54:52,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 08:54:52,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-14 08:54:52,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-14 08:54:52,831 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:54:53,031 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-14 08:54:53,032 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:54:53,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:54:53,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:54:53,052 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:54:53,052 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:54:53,052 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:54:53,052 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-14 08:54:53,053 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:54:53,053 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:54:53,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 08:54:53,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:54:53,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 08:54:53,053 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:54:53,068 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 08:54:53,068 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [68044681] [2020-10-14 08:54:53,069 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:54:53,069 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-14 08:54:53,069 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730418859] [2020-10-14 08:54:53,069 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 08:54:53,069 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:54:53,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 08:54:53,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-14 08:54:53,070 INFO L87 Difference]: Start difference. First operand 22193 states and 33712 transitions. Second operand 6 states. [2020-10-14 08:54:53,260 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-14 08:54:55,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:54:55,031 INFO L93 Difference]: Finished difference Result 66229 states and 100530 transitions. [2020-10-14 08:54:55,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-14 08:54:55,031 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 82 [2020-10-14 08:54:55,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:54:55,116 INFO L225 Difference]: With dead ends: 66229 [2020-10-14 08:54:55,117 INFO L226 Difference]: Without dead ends: 44083 [2020-10-14 08:54:55,170 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-10-14 08:54:55,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44083 states. [2020-10-14 08:54:57,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44083 to 44081. [2020-10-14 08:54:57,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44081 states. [2020-10-14 08:54:57,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44081 states to 44081 states and 66608 transitions. [2020-10-14 08:54:57,268 INFO L78 Accepts]: Start accepts. Automaton has 44081 states and 66608 transitions. Word has length 82 [2020-10-14 08:54:57,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:54:57,268 INFO L479 AbstractCegarLoop]: Abstraction has 44081 states and 66608 transitions. [2020-10-14 08:54:57,269 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 08:54:57,269 INFO L276 IsEmpty]: Start isEmpty. Operand 44081 states and 66608 transitions. [2020-10-14 08:54:57,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-14 08:54:57,269 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:54:57,269 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 08:54:57,269 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-14 08:54:57,270 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:54:57,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:54:57,270 INFO L82 PathProgramCache]: Analyzing trace with hash 1580526490, now seen corresponding path program 1 times [2020-10-14 08:54:57,270 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:54:57,270 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1102764768] [2020-10-14 08:54:57,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:54:57,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:54:57,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:54:57,496 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:54:57,497 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-14 08:54:57,497 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:54:57,497 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 206 [2020-10-14 08:54:57,497 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:54:57,497 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:54:57,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-14 08:54:57,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-14 08:54:57,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-14 08:54:57,498 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:54:57,722 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-14 08:54:57,723 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:54:57,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:54:57,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:54:57,731 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:54:57,731 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:54:57,731 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:54:57,731 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-14 08:54:57,731 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:54:57,731 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:54:57,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:54:57,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:54:57,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:54:57,732 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:54:57,746 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 08:54:57,747 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1102764768] [2020-10-14 08:54:57,747 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:54:57,747 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-14 08:54:57,747 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812937029] [2020-10-14 08:54:57,748 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-14 08:54:57,748 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:54:57,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-14 08:54:57,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-14 08:54:57,749 INFO L87 Difference]: Start difference. First operand 44081 states and 66608 transitions. Second operand 9 states. [2020-10-14 08:54:57,982 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-14 08:55:23,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:55:23,350 INFO L93 Difference]: Finished difference Result 572489 states and 865340 transitions. [2020-10-14 08:55:23,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-14 08:55:23,351 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 82 [2020-10-14 08:55:23,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:55:24,299 INFO L225 Difference]: With dead ends: 572489 [2020-10-14 08:55:24,299 INFO L226 Difference]: Without dead ends: 528455 [2020-10-14 08:55:24,448 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=111, Invalid=231, Unknown=0, NotChecked=0, Total=342 [2020-10-14 08:55:24,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 528455 states. [2020-10-14 08:55:39,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 528455 to 88113. [2020-10-14 08:55:39,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88113 states. [2020-10-14 08:55:39,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88113 states to 88113 states and 131120 transitions. [2020-10-14 08:55:39,565 INFO L78 Accepts]: Start accepts. Automaton has 88113 states and 131120 transitions. Word has length 82 [2020-10-14 08:55:39,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:55:39,565 INFO L479 AbstractCegarLoop]: Abstraction has 88113 states and 131120 transitions. [2020-10-14 08:55:39,565 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-14 08:55:39,565 INFO L276 IsEmpty]: Start isEmpty. Operand 88113 states and 131120 transitions. [2020-10-14 08:55:39,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-14 08:55:39,566 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:55:39,566 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 08:55:39,566 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-14 08:55:39,566 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:55:39,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:55:39,566 INFO L82 PathProgramCache]: Analyzing trace with hash 1889360436, now seen corresponding path program 1 times [2020-10-14 08:55:39,567 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:55:39,567 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1911906982] [2020-10-14 08:55:39,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:55:39,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:55:39,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:55:39,827 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:55:39,827 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-14 08:55:39,827 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:55:39,827 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 239 [2020-10-14 08:55:39,828 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:55:39,828 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:55:39,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-14 08:55:39,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-14 08:55:39,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 73 [2020-10-14 08:55:39,828 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:55:40,117 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-14 08:55:40,118 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:55:40,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:55:40,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:55:40,130 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:55:40,130 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:55:40,130 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:55:40,131 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-14 08:55:40,131 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:55:40,131 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:55:40,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:55:40,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:55:40,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:55:40,132 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:55:40,159 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 08:55:40,160 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1911906982] [2020-10-14 08:55:40,160 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:55:40,160 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-14 08:55:40,161 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669961996] [2020-10-14 08:55:40,161 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-14 08:55:40,161 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:55:40,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-14 08:55:40,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-14 08:55:40,162 INFO L87 Difference]: Start difference. First operand 88113 states and 131120 transitions. Second operand 9 states. [2020-10-14 08:55:40,455 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-14 08:56:22,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:56:22,053 INFO L93 Difference]: Finished difference Result 616521 states and 917564 transitions. [2020-10-14 08:56:22,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-14 08:56:22,054 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 84 [2020-10-14 08:56:22,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:56:22,897 INFO L225 Difference]: With dead ends: 616521 [2020-10-14 08:56:22,897 INFO L226 Difference]: Without dead ends: 528455 [2020-10-14 08:56:23,079 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=111, Invalid=231, Unknown=0, NotChecked=0, Total=342 [2020-10-14 08:56:23,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 528455 states. [2020-10-14 08:56:34,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 528455 to 88113. [2020-10-14 08:56:34,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88113 states. [2020-10-14 08:56:34,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88113 states to 88113 states and 130096 transitions. [2020-10-14 08:56:34,475 INFO L78 Accepts]: Start accepts. Automaton has 88113 states and 130096 transitions. Word has length 84 [2020-10-14 08:56:34,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:56:34,476 INFO L479 AbstractCegarLoop]: Abstraction has 88113 states and 130096 transitions. [2020-10-14 08:56:34,476 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-14 08:56:34,476 INFO L276 IsEmpty]: Start isEmpty. Operand 88113 states and 130096 transitions. [2020-10-14 08:56:34,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-14 08:56:34,476 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:56:34,477 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 08:56:34,477 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-14 08:56:34,477 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:56:34,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:56:34,478 INFO L82 PathProgramCache]: Analyzing trace with hash 1869311093, now seen corresponding path program 1 times [2020-10-14 08:56:34,478 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:56:34,478 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1004022233] [2020-10-14 08:56:34,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:56:34,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:56:34,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:56:34,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:56:34,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:56:34,700 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:56:34,700 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-14 08:56:34,701 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 08:56:34,701 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 188 [2020-10-14 08:56:34,701 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:56:34,701 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:56:34,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 08:56:34,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 08:56:34,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-14 08:56:34,701 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:56:34,872 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-14 08:56:34,873 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:56:34,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:56:34,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:56:34,883 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:56:34,883 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:56:34,883 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:56:34,883 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-14 08:56:34,883 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:56:34,883 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:56:34,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:56:34,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:56:34,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:56:34,884 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:56:34,895 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 08:56:34,895 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1004022233] [2020-10-14 08:56:34,895 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:56:34,896 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 08:56:34,896 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761761791] [2020-10-14 08:56:34,896 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 08:56:34,897 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:56:34,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 08:56:34,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 08:56:34,897 INFO L87 Difference]: Start difference. First operand 88113 states and 130096 transitions. Second operand 4 states. [2020-10-14 08:56:35,073 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 153 [2020-10-14 08:56:48,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:56:48,204 INFO L93 Difference]: Finished difference Result 218679 states and 322612 transitions. [2020-10-14 08:56:48,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 08:56:48,205 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 84 [2020-10-14 08:56:48,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:56:48,360 INFO L225 Difference]: With dead ends: 218679 [2020-10-14 08:56:48,360 INFO L226 Difference]: Without dead ends: 130613 [2020-10-14 08:56:48,419 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 08:56:48,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130613 states. [2020-10-14 08:57:05,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130613 to 130611. [2020-10-14 08:57:05,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130611 states. [2020-10-14 08:57:05,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130611 states to 130611 states and 191026 transitions. [2020-10-14 08:57:05,900 INFO L78 Accepts]: Start accepts. Automaton has 130611 states and 191026 transitions. Word has length 84 [2020-10-14 08:57:05,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:57:05,900 INFO L479 AbstractCegarLoop]: Abstraction has 130611 states and 191026 transitions. [2020-10-14 08:57:05,900 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 08:57:05,900 INFO L276 IsEmpty]: Start isEmpty. Operand 130611 states and 191026 transitions. [2020-10-14 08:57:05,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-14 08:57:05,900 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:57:05,901 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 08:57:05,901 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-14 08:57:05,901 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:57:05,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:57:05,901 INFO L82 PathProgramCache]: Analyzing trace with hash -1561277937, now seen corresponding path program 1 times [2020-10-14 08:57:05,902 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:57:05,902 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1608572453] [2020-10-14 08:57:05,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:57:05,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:57:05,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:57:06,032 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:57:06,032 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-14 08:57:06,032 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:57:06,032 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 109 [2020-10-14 08:57:06,033 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:57:06,033 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:57:06,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 08:57:06,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 87 [2020-10-14 08:57:06,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-14 08:57:06,033 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:57:06,235 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-14 08:57:06,236 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:57:06,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:57:06,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:57:06,249 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:57:06,249 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:57:06,249 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:57:06,250 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-14 08:57:06,250 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:57:06,250 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:57:06,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:57:06,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:57:06,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:57:06,251 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 08:57:06,263 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 08:57:06,263 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1608572453] [2020-10-14 08:57:06,264 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:57:06,264 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-14 08:57:06,264 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387366328] [2020-10-14 08:57:06,264 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 08:57:06,265 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:57:06,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 08:57:06,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-14 08:57:06,265 INFO L87 Difference]: Start difference. First operand 130611 states and 191026 transitions. Second operand 5 states.