/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=BIGGEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-12 20:19:16,130 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-12 20:19:16,137 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-12 20:19:16,179 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-12 20:19:16,179 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-12 20:19:16,188 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-12 20:19:16,190 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-12 20:19:16,194 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-12 20:19:16,197 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-12 20:19:16,200 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-12 20:19:16,201 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-12 20:19:16,202 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-12 20:19:16,203 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-12 20:19:16,206 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-12 20:19:16,209 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-12 20:19:16,212 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-12 20:19:16,213 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-12 20:19:16,214 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-12 20:19:16,216 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-12 20:19:16,223 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-12 20:19:16,224 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-12 20:19:16,226 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-12 20:19:16,227 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-12 20:19:16,228 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-12 20:19:16,240 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-12 20:19:16,240 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-12 20:19:16,241 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-12 20:19:16,245 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-12 20:19:16,245 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-12 20:19:16,246 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-12 20:19:16,246 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-12 20:19:16,250 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-12 20:19:16,251 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-12 20:19:16,252 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-12 20:19:16,253 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-12 20:19:16,253 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-12 20:19:16,256 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-12 20:19:16,256 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-12 20:19:16,256 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-12 20:19:16,257 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-12 20:19:16,258 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-12 20:19:16,262 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-12 20:19:16,301 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-12 20:19:16,302 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-12 20:19:16,304 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-12 20:19:16,304 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-12 20:19:16,305 INFO L138 SettingsManager]: * Use SBE=true [2020-10-12 20:19:16,305 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-12 20:19:16,305 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-12 20:19:16,305 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-12 20:19:16,305 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-12 20:19:16,306 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-12 20:19:16,307 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-12 20:19:16,307 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-12 20:19:16,307 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-12 20:19:16,308 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-12 20:19:16,308 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-12 20:19:16,308 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-12 20:19:16,308 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-12 20:19:16,309 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-12 20:19:16,309 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-12 20:19:16,309 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-12 20:19:16,309 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-12 20:19:16,310 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-12 20:19:16,310 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-12 20:19:16,310 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-12 20:19:16,310 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-12 20:19:16,310 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-12 20:19:16,311 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-12 20:19:16,311 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-12 20:19:16,311 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-12 20:19:16,311 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; [2020-10-12 20:19:16,601 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-12 20:19:16,620 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-12 20:19:16,624 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-12 20:19:16,626 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-12 20:19:16,626 INFO L275 PluginConnector]: CDTParser initialized [2020-10-12 20:19:16,627 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2020-10-12 20:19:16,705 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d788b7c14/7e915337022148c8b159149b34c94c51/FLAGe7bba9a65 [2020-10-12 20:19:17,241 INFO L306 CDTParser]: Found 1 translation units. [2020-10-12 20:19:17,242 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2020-10-12 20:19:17,254 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d788b7c14/7e915337022148c8b159149b34c94c51/FLAGe7bba9a65 [2020-10-12 20:19:17,537 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d788b7c14/7e915337022148c8b159149b34c94c51 [2020-10-12 20:19:17,547 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-12 20:19:17,549 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-12 20:19:17,550 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-12 20:19:17,551 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-12 20:19:17,554 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-12 20:19:17,555 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 08:19:17" (1/1) ... [2020-10-12 20:19:17,558 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@15c2f82d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 08:19:17, skipping insertion in model container [2020-10-12 20:19:17,559 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 08:19:17" (1/1) ... [2020-10-12 20:19:17,567 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-12 20:19:17,614 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-12 20:19:17,947 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 20:19:17,961 INFO L203 MainTranslator]: Completed pre-run [2020-10-12 20:19:18,140 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 20:19:18,164 INFO L208 MainTranslator]: Completed translation [2020-10-12 20:19:18,164 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 08:19:18 WrapperNode [2020-10-12 20:19:18,165 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-12 20:19:18,166 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-12 20:19:18,166 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-12 20:19:18,166 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-12 20:19:18,182 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 08:19:18" (1/1) ... [2020-10-12 20:19:18,182 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 08:19:18" (1/1) ... [2020-10-12 20:19:18,195 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 08:19:18" (1/1) ... [2020-10-12 20:19:18,195 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 08:19:18" (1/1) ... [2020-10-12 20:19:18,212 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 08:19:18" (1/1) ... [2020-10-12 20:19:18,230 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 08:19:18" (1/1) ... [2020-10-12 20:19:18,237 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 08:19:18" (1/1) ... [2020-10-12 20:19:18,243 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-12 20:19:18,244 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-12 20:19:18,244 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-12 20:19:18,244 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-12 20:19:18,245 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 08:19:18" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-12 20:19:18,312 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-12 20:19:18,312 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-12 20:19:18,313 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-12 20:19:18,313 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-12 20:19:18,313 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-12 20:19:18,313 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-12 20:19:18,313 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-12 20:19:18,313 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-12 20:19:18,314 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-12 20:19:18,314 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-12 20:19:18,314 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-12 20:19:18,314 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-12 20:19:18,315 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-12 20:19:18,315 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-12 20:19:18,315 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-12 20:19:18,315 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-12 20:19:18,316 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-12 20:19:18,316 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-12 20:19:18,316 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-12 20:19:18,316 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-12 20:19:19,111 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-12 20:19:19,111 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-12 20:19:19,117 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 08:19:19 BoogieIcfgContainer [2020-10-12 20:19:19,118 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-12 20:19:19,119 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-12 20:19:19,119 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-12 20:19:19,123 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-12 20:19:19,123 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.10 08:19:17" (1/3) ... [2020-10-12 20:19:19,124 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56ae51c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 08:19:19, skipping insertion in model container [2020-10-12 20:19:19,125 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 08:19:18" (2/3) ... [2020-10-12 20:19:19,125 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56ae51c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 08:19:19, skipping insertion in model container [2020-10-12 20:19:19,125 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 08:19:19" (3/3) ... [2020-10-12 20:19:19,127 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.3.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2020-10-12 20:19:19,140 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-12 20:19:19,149 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-12 20:19:19,165 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-12 20:19:19,195 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-12 20:19:19,196 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-12 20:19:19,196 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-12 20:19:19,196 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-12 20:19:19,197 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-12 20:19:19,197 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-12 20:19:19,197 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-12 20:19:19,197 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-12 20:19:19,222 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states. [2020-10-12 20:19:19,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-12 20:19:19,235 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:19:19,237 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 20:19:19,237 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:19:19,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:19:19,245 INFO L82 PathProgramCache]: Analyzing trace with hash 653816526, now seen corresponding path program 1 times [2020-10-12 20:19:19,256 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:19:19,257 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1091264826] [2020-10-12 20:19:19,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:19:19,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:19:19,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:19:19,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:19:20,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:19:20,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:19:22,056 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:19:22,057 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-12 20:19:22,057 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 20:19:22,058 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2416 [2020-10-12 20:19:22,062 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:19:22,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 20:19:22,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 42 [2020-10-12 20:19:22,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-12 20:19:22,063 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-12 20:19:22,401 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-12 20:19:22,404 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:19:22,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:19:22,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:19:22,427 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:19:22,427 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:19:22,427 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:19:22,428 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-12 20:19:22,428 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:19:22,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 20:19:22,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:19:22,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 20:19:22,429 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 20:19:22,452 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 20:19:22,453 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1091264826] [2020-10-12 20:19:22,455 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 20:19:22,456 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-12 20:19:22,456 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189939635] [2020-10-12 20:19:22,462 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 20:19:22,463 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:19:22,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 20:19:22,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-12 20:19:22,482 INFO L87 Difference]: Start difference. First operand 154 states. Second operand 6 states. [2020-10-12 20:19:22,820 WARN L193 SmtUtils]: Spent 256.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-12 20:19:23,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:19:23,900 INFO L93 Difference]: Finished difference Result 712 states and 1188 transitions. [2020-10-12 20:19:23,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 20:19:23,902 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 66 [2020-10-12 20:19:23,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:19:23,922 INFO L225 Difference]: With dead ends: 712 [2020-10-12 20:19:23,922 INFO L226 Difference]: Without dead ends: 595 [2020-10-12 20:19:23,928 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-10-12 20:19:23,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 595 states. [2020-10-12 20:19:24,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 595 to 237. [2020-10-12 20:19:24,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 237 states. [2020-10-12 20:19:24,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 374 transitions. [2020-10-12 20:19:24,008 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 374 transitions. Word has length 66 [2020-10-12 20:19:24,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:19:24,009 INFO L479 AbstractCegarLoop]: Abstraction has 237 states and 374 transitions. [2020-10-12 20:19:24,009 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 20:19:24,009 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 374 transitions. [2020-10-12 20:19:24,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-12 20:19:24,013 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:19:24,013 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 20:19:24,013 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-12 20:19:24,014 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:19:24,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:19:24,014 INFO L82 PathProgramCache]: Analyzing trace with hash -1268134624, now seen corresponding path program 1 times [2020-10-12 20:19:24,014 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:19:24,015 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1640043270] [2020-10-12 20:19:24,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:19:24,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:19:24,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:19:24,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:19:24,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:19:24,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:19:24,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:19:26,794 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:19:26,796 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-12 20:19:26,801 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 20:19:26,801 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2745 [2020-10-12 20:19:26,802 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:19:26,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 20:19:26,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-10-12 20:19:26,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-12 20:19:26,803 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 20:19:27,142 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-12 20:19:27,143 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:19:27,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:19:27,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:19:27,163 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:19:27,164 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:19:27,164 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:19:27,165 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-12 20:19:27,165 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:19:27,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 20:19:27,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:19:27,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 20:19:27,166 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 20:19:27,183 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 20:19:27,184 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1640043270] [2020-10-12 20:19:27,184 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 20:19:27,185 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-12 20:19:27,185 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29335027] [2020-10-12 20:19:27,187 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 20:19:27,187 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:19:27,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 20:19:27,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-12 20:19:27,188 INFO L87 Difference]: Start difference. First operand 237 states and 374 transitions. Second operand 7 states. [2020-10-12 20:19:27,457 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 174 [2020-10-12 20:19:28,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:19:28,736 INFO L93 Difference]: Finished difference Result 1483 states and 2442 transitions. [2020-10-12 20:19:28,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-12 20:19:28,737 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 67 [2020-10-12 20:19:28,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:19:28,750 INFO L225 Difference]: With dead ends: 1483 [2020-10-12 20:19:28,754 INFO L226 Difference]: Without dead ends: 1307 [2020-10-12 20:19:28,761 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-10-12 20:19:28,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1307 states. [2020-10-12 20:19:28,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1307 to 694. [2020-10-12 20:19:28,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 694 states. [2020-10-12 20:19:28,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 694 states to 694 states and 1133 transitions. [2020-10-12 20:19:28,858 INFO L78 Accepts]: Start accepts. Automaton has 694 states and 1133 transitions. Word has length 67 [2020-10-12 20:19:28,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:19:28,858 INFO L479 AbstractCegarLoop]: Abstraction has 694 states and 1133 transitions. [2020-10-12 20:19:28,858 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 20:19:28,859 INFO L276 IsEmpty]: Start isEmpty. Operand 694 states and 1133 transitions. [2020-10-12 20:19:28,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-12 20:19:28,862 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:19:28,862 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 20:19:28,862 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-12 20:19:28,863 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:19:28,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:19:28,863 INFO L82 PathProgramCache]: Analyzing trace with hash -714520107, now seen corresponding path program 1 times [2020-10-12 20:19:28,864 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:19:28,864 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1709789166] [2020-10-12 20:19:28,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:19:28,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:19:28,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:19:28,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:19:29,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:19:29,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:19:29,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:19:31,226 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:19:31,227 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-12 20:19:31,227 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 20:19:31,228 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2327 [2020-10-12 20:19:31,228 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:19:31,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 20:19:31,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 42 [2020-10-12 20:19:31,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-12 20:19:31,229 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 20:19:31,458 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-12 20:19:31,459 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:19:31,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:19:31,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:19:31,474 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:19:31,475 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:19:31,475 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:19:31,475 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-12 20:19:31,475 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:19:31,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 20:19:31,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:19:31,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 20:19:31,477 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 20:19:31,494 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 20:19:31,495 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1709789166] [2020-10-12 20:19:31,495 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 20:19:31,495 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-12 20:19:31,496 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77352084] [2020-10-12 20:19:31,496 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 20:19:31,497 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:19:31,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 20:19:31,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-12 20:19:31,497 INFO L87 Difference]: Start difference. First operand 694 states and 1133 transitions. Second operand 7 states. [2020-10-12 20:19:31,711 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 174 [2020-10-12 20:19:33,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:19:33,355 INFO L93 Difference]: Finished difference Result 4276 states and 7063 transitions. [2020-10-12 20:19:33,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-12 20:19:33,356 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 68 [2020-10-12 20:19:33,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:19:33,380 INFO L225 Difference]: With dead ends: 4276 [2020-10-12 20:19:33,380 INFO L226 Difference]: Without dead ends: 3699 [2020-10-12 20:19:33,393 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-10-12 20:19:33,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3699 states. [2020-10-12 20:19:33,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3699 to 1998. [2020-10-12 20:19:33,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1998 states. [2020-10-12 20:19:33,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1998 states to 1998 states and 3285 transitions. [2020-10-12 20:19:33,576 INFO L78 Accepts]: Start accepts. Automaton has 1998 states and 3285 transitions. Word has length 68 [2020-10-12 20:19:33,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:19:33,576 INFO L479 AbstractCegarLoop]: Abstraction has 1998 states and 3285 transitions. [2020-10-12 20:19:33,577 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 20:19:33,577 INFO L276 IsEmpty]: Start isEmpty. Operand 1998 states and 3285 transitions. [2020-10-12 20:19:33,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-12 20:19:33,582 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:19:33,583 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 20:19:33,583 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-12 20:19:33,583 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:19:33,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:19:33,584 INFO L82 PathProgramCache]: Analyzing trace with hash -727781241, now seen corresponding path program 1 times [2020-10-12 20:19:33,584 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:19:33,585 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [136249460] [2020-10-12 20:19:33,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:19:33,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:19:33,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:19:33,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:19:33,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:19:34,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:19:34,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:19:35,842 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:19:35,842 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-12 20:19:35,843 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 20:19:35,843 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2222 [2020-10-12 20:19:35,843 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:19:35,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 20:19:35,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 42 [2020-10-12 20:19:35,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-12 20:19:35,844 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:19:36,127 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-12 20:19:36,128 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:19:36,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:19:36,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:19:36,147 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:19:36,147 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:19:36,148 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:19:36,148 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-12 20:19:36,148 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:19:36,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 20:19:36,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:19:36,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 20:19:36,149 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:19:36,166 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 20:19:36,167 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [136249460] [2020-10-12 20:19:36,167 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 20:19:36,167 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-12 20:19:36,167 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68591045] [2020-10-12 20:19:36,168 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 20:19:36,168 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:19:36,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 20:19:36,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-12 20:19:36,169 INFO L87 Difference]: Start difference. First operand 1998 states and 3285 transitions. Second operand 7 states. [2020-10-12 20:19:36,397 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 174 [2020-10-12 20:19:38,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:19:38,119 INFO L93 Difference]: Finished difference Result 12171 states and 20062 transitions. [2020-10-12 20:19:38,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-12 20:19:38,120 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 69 [2020-10-12 20:19:38,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:19:38,179 INFO L225 Difference]: With dead ends: 12171 [2020-10-12 20:19:38,180 INFO L226 Difference]: Without dead ends: 10334 [2020-10-12 20:19:38,190 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-10-12 20:19:38,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10334 states. [2020-10-12 20:19:38,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10334 to 5593. [2020-10-12 20:19:38,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5593 states. [2020-10-12 20:19:38,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5593 states to 5593 states and 9191 transitions. [2020-10-12 20:19:38,643 INFO L78 Accepts]: Start accepts. Automaton has 5593 states and 9191 transitions. Word has length 69 [2020-10-12 20:19:38,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:19:38,643 INFO L479 AbstractCegarLoop]: Abstraction has 5593 states and 9191 transitions. [2020-10-12 20:19:38,644 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 20:19:38,644 INFO L276 IsEmpty]: Start isEmpty. Operand 5593 states and 9191 transitions. [2020-10-12 20:19:38,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-12 20:19:38,645 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:19:38,646 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 20:19:38,646 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-12 20:19:38,646 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:19:38,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:19:38,647 INFO L82 PathProgramCache]: Analyzing trace with hash 2053684873, now seen corresponding path program 1 times [2020-10-12 20:19:38,647 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:19:38,647 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1360020104] [2020-10-12 20:19:38,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:19:38,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:19:38,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:19:38,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:19:38,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:19:38,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:19:39,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:19:40,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:19:40,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:19:43,682 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:19:43,683 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-12 20:19:43,683 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-12 20:19:43,684 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-12 20:19:43,684 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:19:43,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 20:19:43,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-10-12 20:19:43,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-12 20:19:43,685 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 20:19:43,951 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-12 20:19:43,952 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:19:43,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:19:43,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:19:43,968 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:19:43,968 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:19:43,968 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:19:43,968 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-12 20:19:43,969 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:19:43,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 20:19:43,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:19:43,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 20:19:43,970 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 20:19:43,989 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 20:19:43,990 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1360020104] [2020-10-12 20:19:43,990 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 20:19:43,991 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-12 20:19:43,991 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784232130] [2020-10-12 20:19:43,992 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 20:19:43,992 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:19:43,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 20:19:43,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-12 20:19:43,993 INFO L87 Difference]: Start difference. First operand 5593 states and 9191 transitions. Second operand 6 states. [2020-10-12 20:19:44,227 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 173 [2020-10-12 20:19:46,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:19:46,240 INFO L93 Difference]: Finished difference Result 22019 states and 36222 transitions. [2020-10-12 20:19:46,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 20:19:46,240 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 70 [2020-10-12 20:19:46,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:19:46,314 INFO L225 Difference]: With dead ends: 22019 [2020-10-12 20:19:46,314 INFO L226 Difference]: Without dead ends: 16588 [2020-10-12 20:19:46,334 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-10-12 20:19:46,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16588 states. [2020-10-12 20:19:47,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16588 to 10757. [2020-10-12 20:19:47,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10757 states. [2020-10-12 20:19:47,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10757 states to 10757 states and 17648 transitions. [2020-10-12 20:19:47,227 INFO L78 Accepts]: Start accepts. Automaton has 10757 states and 17648 transitions. Word has length 70 [2020-10-12 20:19:47,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:19:47,229 INFO L479 AbstractCegarLoop]: Abstraction has 10757 states and 17648 transitions. [2020-10-12 20:19:47,229 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 20:19:47,229 INFO L276 IsEmpty]: Start isEmpty. Operand 10757 states and 17648 transitions. [2020-10-12 20:19:47,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-12 20:19:47,231 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:19:47,231 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 20:19:47,231 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-12 20:19:47,231 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:19:47,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:19:47,232 INFO L82 PathProgramCache]: Analyzing trace with hash -990936345, now seen corresponding path program 1 times [2020-10-12 20:19:47,232 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:19:47,232 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1263106825] [2020-10-12 20:19:47,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:19:47,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:19:47,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:19:47,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:19:47,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:19:47,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:19:47,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:19:48,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:19:48,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:19:52,257 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:19:52,258 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-12 20:19:52,258 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-12 20:19:52,258 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-12 20:19:52,258 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:19:52,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 20:19:52,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 42 [2020-10-12 20:19:52,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-12 20:19:52,259 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:19:52,491 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-12 20:19:52,492 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:19:52,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:19:52,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:19:52,510 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:19:52,511 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:19:52,511 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:19:52,512 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-12 20:19:52,512 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:19:52,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 20:19:52,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:19:52,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 20:19:52,514 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 20:19:52,538 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 20:19:52,539 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1263106825] [2020-10-12 20:19:52,540 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 20:19:52,540 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-12 20:19:52,541 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840396748] [2020-10-12 20:19:52,541 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 20:19:52,542 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:19:52,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 20:19:52,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-12 20:19:52,543 INFO L87 Difference]: Start difference. First operand 10757 states and 17648 transitions. Second operand 6 states. [2020-10-12 20:19:52,847 WARN L193 SmtUtils]: Spent 252.00 ms on a formula simplification that was a NOOP. DAG size: 173 [2020-10-12 20:19:54,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:19:54,772 INFO L93 Difference]: Finished difference Result 29469 states and 48327 transitions. [2020-10-12 20:19:54,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 20:19:54,773 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 70 [2020-10-12 20:19:54,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:19:54,840 INFO L225 Difference]: With dead ends: 29469 [2020-10-12 20:19:54,840 INFO L226 Difference]: Without dead ends: 23298 [2020-10-12 20:19:54,860 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-10-12 20:19:54,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23298 states. [2020-10-12 20:19:55,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23298 to 17233. [2020-10-12 20:19:55,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17233 states. [2020-10-12 20:19:55,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17233 states to 17233 states and 28271 transitions. [2020-10-12 20:19:55,883 INFO L78 Accepts]: Start accepts. Automaton has 17233 states and 28271 transitions. Word has length 70 [2020-10-12 20:19:55,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:19:55,884 INFO L479 AbstractCegarLoop]: Abstraction has 17233 states and 28271 transitions. [2020-10-12 20:19:55,884 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 20:19:55,884 INFO L276 IsEmpty]: Start isEmpty. Operand 17233 states and 28271 transitions. [2020-10-12 20:19:55,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-12 20:19:55,885 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:19:55,886 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 20:19:55,886 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-12 20:19:55,886 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:19:55,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:19:55,887 INFO L82 PathProgramCache]: Analyzing trace with hash -1998371771, now seen corresponding path program 1 times [2020-10-12 20:19:55,887 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:19:55,887 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1712976373] [2020-10-12 20:19:55,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:19:55,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:19:55,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:19:55,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:19:56,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:19:56,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:19:56,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:19:56,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:19:57,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:20:00,910 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:20:00,911 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-12 20:20:00,911 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-12 20:20:00,911 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-12 20:20:00,911 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:20:00,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 20:20:00,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 42 [2020-10-12 20:20:00,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-12 20:20:00,911 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:20:01,155 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-12 20:20:01,156 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:20:01,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:20:01,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:20:01,173 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:20:01,173 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:20:01,173 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:20:01,173 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-12 20:20:01,174 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:20:01,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 20:20:01,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:20:01,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 20:20:01,174 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:20:01,189 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 20:20:01,190 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1712976373] [2020-10-12 20:20:01,190 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 20:20:01,190 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-12 20:20:01,191 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534747615] [2020-10-12 20:20:01,191 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 20:20:01,191 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:20:01,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 20:20:01,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-12 20:20:01,192 INFO L87 Difference]: Start difference. First operand 17233 states and 28271 transitions. Second operand 6 states. [2020-10-12 20:20:01,401 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 173 [2020-10-12 20:20:03,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:20:03,578 INFO L93 Difference]: Finished difference Result 33695 states and 55260 transitions. [2020-10-12 20:20:03,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 20:20:03,579 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 70 [2020-10-12 20:20:03,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:20:03,667 INFO L225 Difference]: With dead ends: 33695 [2020-10-12 20:20:03,667 INFO L226 Difference]: Without dead ends: 27524 [2020-10-12 20:20:03,688 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-10-12 20:20:03,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27524 states. [2020-10-12 20:20:05,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27524 to 21525. [2020-10-12 20:20:05,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21525 states. [2020-10-12 20:20:05,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21525 states to 21525 states and 35313 transitions. [2020-10-12 20:20:05,213 INFO L78 Accepts]: Start accepts. Automaton has 21525 states and 35313 transitions. Word has length 70 [2020-10-12 20:20:05,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:20:05,213 INFO L479 AbstractCegarLoop]: Abstraction has 21525 states and 35313 transitions. [2020-10-12 20:20:05,213 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 20:20:05,213 INFO L276 IsEmpty]: Start isEmpty. Operand 21525 states and 35313 transitions. [2020-10-12 20:20:05,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-12 20:20:05,215 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:20:05,215 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] [2020-10-12 20:20:05,215 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-12 20:20:05,215 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:20:05,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:20:05,216 INFO L82 PathProgramCache]: Analyzing trace with hash 1536201620, now seen corresponding path program 1 times [2020-10-12 20:20:05,216 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:20:05,216 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [551751776] [2020-10-12 20:20:05,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:20:05,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:20:05,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:20:05,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:20:05,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:20:05,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:20:05,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:20:05,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:20:05,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:20:08,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:20:10,244 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:20:10,245 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-12 20:20:10,245 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 20:20:10,245 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-12 20:20:10,245 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:20:10,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-12 20:20:10,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 42 [2020-10-12 20:20:10,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-12 20:20:10,245 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:20:10,446 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-12 20:20:10,447 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:20:10,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:20:10,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:20:10,458 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:20:10,458 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:20:10,459 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:20:10,459 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-12 20:20:10,459 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:20:10,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 20:20:10,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:20:10,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 20:20:10,460 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:20:10,472 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 20:20:10,473 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [551751776] [2020-10-12 20:20:10,473 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 20:20:10,473 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-12 20:20:10,473 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239687007] [2020-10-12 20:20:10,474 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-12 20:20:10,474 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:20:10,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-12 20:20:10,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-12 20:20:10,475 INFO L87 Difference]: Start difference. First operand 21525 states and 35313 transitions. Second operand 5 states. [2020-10-12 20:20:10,679 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 171 [2020-10-12 20:20:12,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:20:12,377 INFO L93 Difference]: Finished difference Result 46289 states and 75924 transitions. [2020-10-12 20:20:12,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-12 20:20:12,378 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 71 [2020-10-12 20:20:12,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:20:12,442 INFO L225 Difference]: With dead ends: 46289 [2020-10-12 20:20:12,442 INFO L226 Difference]: Without dead ends: 25660 [2020-10-12 20:20:12,481 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-12 20:20:12,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25660 states. [2020-10-12 20:20:13,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25660 to 23755. [2020-10-12 20:20:13,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23755 states. [2020-10-12 20:20:13,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23755 states to 23755 states and 39024 transitions. [2020-10-12 20:20:13,590 INFO L78 Accepts]: Start accepts. Automaton has 23755 states and 39024 transitions. Word has length 71 [2020-10-12 20:20:13,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:20:13,590 INFO L479 AbstractCegarLoop]: Abstraction has 23755 states and 39024 transitions. [2020-10-12 20:20:13,590 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-12 20:20:13,590 INFO L276 IsEmpty]: Start isEmpty. Operand 23755 states and 39024 transitions. [2020-10-12 20:20:13,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-12 20:20:13,591 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:20:13,591 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] [2020-10-12 20:20:13,592 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-12 20:20:13,592 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:20:13,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:20:13,592 INFO L82 PathProgramCache]: Analyzing trace with hash -807738537, now seen corresponding path program 1 times [2020-10-12 20:20:13,592 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:20:13,592 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [135756987] [2020-10-12 20:20:13,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:20:13,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:20:13,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:20:13,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:20:13,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:20:13,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:20:13,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:20:14,446 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:20:14,446 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-12 20:20:14,446 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 20:20:14,446 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 831 [2020-10-12 20:20:14,446 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:20:14,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 20:20:14,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 42 [2020-10-12 20:20:14,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-12 20:20:14,447 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:20:14,896 WARN L193 SmtUtils]: Spent 351.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-12 20:20:14,898 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:20:14,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:20:14,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:20:14,911 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:20:14,912 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:20:14,912 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:20:14,912 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-12 20:20:14,912 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:20:14,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 20:20:14,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:20:14,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 20:20:14,913 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:20:14,932 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 20:20:14,933 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [135756987] [2020-10-12 20:20:14,933 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 20:20:14,933 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-12 20:20:14,934 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950634872] [2020-10-12 20:20:14,934 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 20:20:14,934 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:20:14,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 20:20:14,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-12 20:20:14,935 INFO L87 Difference]: Start difference. First operand 23755 states and 39024 transitions. Second operand 6 states. [2020-10-12 20:20:15,187 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 177 [2020-10-12 20:20:16,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:20:16,995 INFO L93 Difference]: Finished difference Result 47368 states and 77821 transitions. [2020-10-12 20:20:16,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 20:20:16,996 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 71 [2020-10-12 20:20:16,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:20:17,048 INFO L225 Difference]: With dead ends: 47368 [2020-10-12 20:20:17,049 INFO L226 Difference]: Without dead ends: 23765 [2020-10-12 20:20:17,101 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-10-12 20:20:17,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23765 states. [2020-10-12 20:20:18,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23765 to 23755. [2020-10-12 20:20:18,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23755 states. [2020-10-12 20:20:18,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23755 states to 23755 states and 38976 transitions. [2020-10-12 20:20:18,552 INFO L78 Accepts]: Start accepts. Automaton has 23755 states and 38976 transitions. Word has length 71 [2020-10-12 20:20:18,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:20:18,552 INFO L479 AbstractCegarLoop]: Abstraction has 23755 states and 38976 transitions. [2020-10-12 20:20:18,552 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 20:20:18,552 INFO L276 IsEmpty]: Start isEmpty. Operand 23755 states and 38976 transitions. [2020-10-12 20:20:18,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-12 20:20:18,553 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:20:18,554 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] [2020-10-12 20:20:18,554 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-12 20:20:18,554 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:20:18,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:20:18,554 INFO L82 PathProgramCache]: Analyzing trace with hash 234197712, now seen corresponding path program 1 times [2020-10-12 20:20:18,554 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:20:18,555 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [745543508] [2020-10-12 20:20:18,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:20:18,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:20:18,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:20:18,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:20:18,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:20:18,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:20:19,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:20:19,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:20:20,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:20:20,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:20:23,582 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:20:23,582 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-12 20:20:23,582 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 20:20:23,582 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-12 20:20:23,582 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:20:23,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 20:20:23,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 44 [2020-10-12 20:20:23,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-12 20:20:23,583 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:20:23,815 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-12 20:20:23,815 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:20:23,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:20:23,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:20:23,829 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:20:23,830 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:20:23,830 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:20:23,830 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-12 20:20:23,831 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:20:23,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 20:20:23,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:20:23,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 20:20:23,831 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:20:23,845 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 20:20:23,845 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [745543508] [2020-10-12 20:20:23,846 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 20:20:23,846 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-12 20:20:23,846 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915449206] [2020-10-12 20:20:23,847 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 20:20:23,847 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:20:23,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 20:20:23,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-12 20:20:23,848 INFO L87 Difference]: Start difference. First operand 23755 states and 38976 transitions. Second operand 7 states. [2020-10-12 20:20:24,067 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 171 [2020-10-12 20:20:27,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:20:27,065 INFO L93 Difference]: Finished difference Result 50227 states and 82429 transitions. [2020-10-12 20:20:27,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-12 20:20:27,066 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 72 [2020-10-12 20:20:27,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:20:27,130 INFO L225 Difference]: With dead ends: 50227 [2020-10-12 20:20:27,130 INFO L226 Difference]: Without dead ends: 39632 [2020-10-12 20:20:27,154 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-10-12 20:20:27,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39632 states. [2020-10-12 20:20:28,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39632 to 29032. [2020-10-12 20:20:28,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29032 states. [2020-10-12 20:20:28,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29032 states to 29032 states and 47651 transitions. [2020-10-12 20:20:28,875 INFO L78 Accepts]: Start accepts. Automaton has 29032 states and 47651 transitions. Word has length 72 [2020-10-12 20:20:28,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:20:28,876 INFO L479 AbstractCegarLoop]: Abstraction has 29032 states and 47651 transitions. [2020-10-12 20:20:28,876 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 20:20:28,876 INFO L276 IsEmpty]: Start isEmpty. Operand 29032 states and 47651 transitions. [2020-10-12 20:20:28,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-12 20:20:28,877 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:20:28,877 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] [2020-10-12 20:20:28,878 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-12 20:20:28,878 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:20:28,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:20:28,878 INFO L82 PathProgramCache]: Analyzing trace with hash -579982883, now seen corresponding path program 1 times [2020-10-12 20:20:28,878 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:20:28,879 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [38760704] [2020-10-12 20:20:28,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:20:28,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:20:28,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:20:28,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:20:28,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:20:29,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:20:29,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:20:29,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:20:29,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:20:31,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:20:33,897 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:20:33,897 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-12 20:20:33,897 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 20:20:33,897 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-12 20:20:33,898 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:20:33,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-12 20:20:33,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-12 20:20:33,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-12 20:20:33,898 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:20:34,143 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-12 20:20:34,145 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:20:34,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:20:34,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:20:34,155 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:20:34,155 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:20:34,155 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:20:34,156 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-12 20:20:34,156 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:20:34,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 20:20:34,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:20:34,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 20:20:34,156 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:20:34,168 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 20:20:34,169 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [38760704] [2020-10-12 20:20:34,169 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 20:20:34,169 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-12 20:20:34,169 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997267569] [2020-10-12 20:20:34,169 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-12 20:20:34,170 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:20:34,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-12 20:20:34,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-12 20:20:34,170 INFO L87 Difference]: Start difference. First operand 29032 states and 47651 transitions. Second operand 5 states. [2020-10-12 20:20:34,402 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 177 [2020-10-12 20:20:38,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:20:38,817 INFO L93 Difference]: Finished difference Result 102920 states and 168654 transitions. [2020-10-12 20:20:38,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-12 20:20:38,818 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 72 [2020-10-12 20:20:38,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:20:38,934 INFO L225 Difference]: With dead ends: 102920 [2020-10-12 20:20:38,934 INFO L226 Difference]: Without dead ends: 76105 [2020-10-12 20:20:38,968 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-12 20:20:39,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76105 states. [2020-10-12 20:20:42,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76105 to 56681. [2020-10-12 20:20:42,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56681 states. [2020-10-12 20:20:42,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56681 states to 56681 states and 92732 transitions. [2020-10-12 20:20:42,382 INFO L78 Accepts]: Start accepts. Automaton has 56681 states and 92732 transitions. Word has length 72 [2020-10-12 20:20:42,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:20:42,382 INFO L479 AbstractCegarLoop]: Abstraction has 56681 states and 92732 transitions. [2020-10-12 20:20:42,382 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-12 20:20:42,382 INFO L276 IsEmpty]: Start isEmpty. Operand 56681 states and 92732 transitions. [2020-10-12 20:20:42,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-12 20:20:42,384 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:20:42,384 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] [2020-10-12 20:20:42,384 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-12 20:20:42,385 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:20:42,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:20:42,385 INFO L82 PathProgramCache]: Analyzing trace with hash -511424921, now seen corresponding path program 1 times [2020-10-12 20:20:42,385 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:20:42,386 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1397782790] [2020-10-12 20:20:42,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:20:42,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:20:42,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:20:42,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:20:42,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:20:42,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:20:42,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:20:43,093 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:20:43,093 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-12 20:20:43,093 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 20:20:43,093 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 686 [2020-10-12 20:20:43,094 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:20:43,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 20:20:43,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 30 [2020-10-12 20:20:43,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-12 20:20:43,094 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:20:43,291 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-12 20:20:43,292 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:20:43,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:20:43,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:20:43,302 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:20:43,302 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:20:43,302 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:20:43,302 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-12 20:20:43,302 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:20:43,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 20:20:43,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:20:43,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 20:20:43,303 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:20:43,311 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 20:20:43,311 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1397782790] [2020-10-12 20:20:43,311 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 20:20:43,312 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-12 20:20:43,312 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186415141] [2020-10-12 20:20:43,312 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-12 20:20:43,313 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:20:43,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-12 20:20:43,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-12 20:20:43,313 INFO L87 Difference]: Start difference. First operand 56681 states and 92732 transitions. Second operand 4 states. [2020-10-12 20:20:43,517 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 168 [2020-10-12 20:20:48,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:20:48,754 INFO L93 Difference]: Finished difference Result 123825 states and 202378 transitions. [2020-10-12 20:20:48,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-12 20:20:48,754 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 72 [2020-10-12 20:20:48,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:20:48,850 INFO L225 Difference]: With dead ends: 123825 [2020-10-12 20:20:48,850 INFO L226 Difference]: Without dead ends: 67312 [2020-10-12 20:20:48,903 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 [2020-10-12 20:20:48,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67312 states. [2020-10-12 20:20:52,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67312 to 67310. [2020-10-12 20:20:52,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67310 states. [2020-10-12 20:20:52,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67310 states to 67310 states and 109612 transitions. [2020-10-12 20:20:52,728 INFO L78 Accepts]: Start accepts. Automaton has 67310 states and 109612 transitions. Word has length 72 [2020-10-12 20:20:52,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:20:52,728 INFO L479 AbstractCegarLoop]: Abstraction has 67310 states and 109612 transitions. [2020-10-12 20:20:52,728 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-12 20:20:52,728 INFO L276 IsEmpty]: Start isEmpty. Operand 67310 states and 109612 transitions. [2020-10-12 20:20:52,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-12 20:20:52,730 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:20:52,730 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] [2020-10-12 20:20:52,730 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-12 20:20:52,730 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:20:52,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:20:52,731 INFO L82 PathProgramCache]: Analyzing trace with hash -1382299924, now seen corresponding path program 1 times [2020-10-12 20:20:52,731 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:20:52,731 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2134773663] [2020-10-12 20:20:52,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:20:52,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:20:52,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:20:52,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:20:52,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:20:52,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:20:53,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:20:53,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:20:54,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:20:54,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:20:57,751 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:20:57,751 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-12 20:20:57,751 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 20:20:57,751 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-12 20:20:57,751 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:20:57,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 20:20:57,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-10-12 20:20:57,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-12 20:20:57,752 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:20:57,964 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-12 20:20:57,965 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:20:57,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:20:57,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:20:57,974 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:20:57,974 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:20:57,974 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:20:57,974 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-12 20:20:57,974 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:20:57,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 20:20:57,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:20:57,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 20:20:57,975 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:20:57,983 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 20:20:57,983 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2134773663] [2020-10-12 20:20:57,983 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 20:20:57,983 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-12 20:20:57,985 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529698148] [2020-10-12 20:20:57,986 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 20:20:57,986 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:20:57,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 20:20:57,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-12 20:20:57,987 INFO L87 Difference]: Start difference. First operand 67310 states and 109612 transitions. Second operand 7 states. [2020-10-12 20:20:58,210 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 171 [2020-10-12 20:21:05,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:21:05,915 INFO L93 Difference]: Finished difference Result 133414 states and 217826 transitions. [2020-10-12 20:21:05,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-12 20:21:05,916 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 73 [2020-10-12 20:21:05,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:21:06,079 INFO L225 Difference]: With dead ends: 133414 [2020-10-12 20:21:06,079 INFO L226 Difference]: Without dead ends: 104692 [2020-10-12 20:21:06,115 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-10-12 20:21:06,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104692 states. [2020-10-12 20:21:11,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104692 to 78227. [2020-10-12 20:21:11,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78227 states. [2020-10-12 20:21:11,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78227 states to 78227 states and 127504 transitions. [2020-10-12 20:21:11,209 INFO L78 Accepts]: Start accepts. Automaton has 78227 states and 127504 transitions. Word has length 73 [2020-10-12 20:21:11,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:21:11,209 INFO L479 AbstractCegarLoop]: Abstraction has 78227 states and 127504 transitions. [2020-10-12 20:21:11,209 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 20:21:11,209 INFO L276 IsEmpty]: Start isEmpty. Operand 78227 states and 127504 transitions. [2020-10-12 20:21:11,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-12 20:21:11,211 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:21:11,211 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] [2020-10-12 20:21:11,211 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-12 20:21:11,211 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:21:11,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:21:11,212 INFO L82 PathProgramCache]: Analyzing trace with hash -813614464, now seen corresponding path program 1 times [2020-10-12 20:21:11,212 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:21:11,212 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2042909118] [2020-10-12 20:21:11,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:21:11,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:21:11,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:21:11,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:21:11,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:21:11,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:21:11,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:21:11,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:21:11,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:21:11,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:21:16,230 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:21:16,230 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-12 20:21:16,230 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 20:21:16,230 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-12 20:21:16,230 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:21:16,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-12 20:21:16,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 20:21:16,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-12 20:21:16,231 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:21:16,470 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-12 20:21:16,471 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:21:16,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:21:16,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:21:16,480 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:21:16,480 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:21:16,480 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:21:16,481 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-12 20:21:16,481 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:21:16,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 20:21:16,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:21:16,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 20:21:16,481 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:21:16,498 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 20:21:16,499 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2042909118] [2020-10-12 20:21:16,499 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 20:21:16,499 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-12 20:21:16,499 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452305310] [2020-10-12 20:21:16,500 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-12 20:21:16,500 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:21:16,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-12 20:21:16,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-12 20:21:16,500 INFO L87 Difference]: Start difference. First operand 78227 states and 127504 transitions. Second operand 5 states. [2020-10-12 20:21:27,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:21:27,435 INFO L93 Difference]: Finished difference Result 228559 states and 372406 transitions. [2020-10-12 20:21:27,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-12 20:21:27,435 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 74 [2020-10-12 20:21:27,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:21:27,660 INFO L225 Difference]: With dead ends: 228559 [2020-10-12 20:21:27,660 INFO L226 Difference]: Without dead ends: 150357 [2020-10-12 20:21:27,733 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-12 20:21:27,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150357 states. [2020-10-12 20:21:41,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150357 to 150355. [2020-10-12 20:21:41,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150355 states. [2020-10-12 20:21:41,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150355 states to 150355 states and 243101 transitions. [2020-10-12 20:21:41,270 INFO L78 Accepts]: Start accepts. Automaton has 150355 states and 243101 transitions. Word has length 74 [2020-10-12 20:21:41,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:21:41,270 INFO L479 AbstractCegarLoop]: Abstraction has 150355 states and 243101 transitions. [2020-10-12 20:21:41,270 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-12 20:21:41,271 INFO L276 IsEmpty]: Start isEmpty. Operand 150355 states and 243101 transitions. [2020-10-12 20:21:41,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-12 20:21:41,273 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:21:41,273 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] [2020-10-12 20:21:41,273 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-12 20:21:41,273 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:21:41,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:21:41,273 INFO L82 PathProgramCache]: Analyzing trace with hash -1049951795, now seen corresponding path program 1 times [2020-10-12 20:21:41,274 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:21:41,274 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1815270136] [2020-10-12 20:21:41,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:21:41,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:21:41,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:21:41,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:21:41,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:21:41,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:21:41,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:21:41,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:21:41,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:21:43,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:21:43,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:21:46,291 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:21:46,291 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-12 20:21:46,291 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-12 20:21:46,291 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-12 20:21:46,291 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:21:46,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 20:21:46,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 42 [2020-10-12 20:21:46,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-12 20:21:46,292 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:21:46,506 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-12 20:21:46,507 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:21:46,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:21:46,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:21:46,520 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:21:46,520 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:21:46,520 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:21:46,520 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-12 20:21:46,521 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:21:46,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 20:21:46,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:21:46,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 20:21:46,521 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:21:46,534 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 20:21:46,535 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1815270136] [2020-10-12 20:21:46,535 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 20:21:46,535 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-12 20:21:46,535 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485998998] [2020-10-12 20:21:46,536 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 20:21:46,536 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:21:46,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 20:21:46,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-12 20:21:46,536 INFO L87 Difference]: Start difference. First operand 150355 states and 243101 transitions. Second operand 7 states. [2020-10-12 20:21:46,790 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 171 [2020-10-12 20:22:04,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:22:04,844 INFO L93 Difference]: Finished difference Result 284463 states and 459796 transitions. [2020-10-12 20:22:04,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-12 20:22:04,845 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 74 [2020-10-12 20:22:04,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:22:05,175 INFO L225 Difference]: With dead ends: 284463 [2020-10-12 20:22:05,175 INFO L226 Difference]: Without dead ends: 204029 [2020-10-12 20:22:05,253 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-10-12 20:22:05,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204029 states. [2020-10-12 20:22:18,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204029 to 169508. [2020-10-12 20:22:18,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169508 states. [2020-10-12 20:22:22,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169508 states to 169508 states and 273930 transitions. [2020-10-12 20:22:22,757 INFO L78 Accepts]: Start accepts. Automaton has 169508 states and 273930 transitions. Word has length 74 [2020-10-12 20:22:22,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:22:22,757 INFO L479 AbstractCegarLoop]: Abstraction has 169508 states and 273930 transitions. [2020-10-12 20:22:22,757 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 20:22:22,757 INFO L276 IsEmpty]: Start isEmpty. Operand 169508 states and 273930 transitions. [2020-10-12 20:22:22,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-12 20:22:22,759 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:22:22,759 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] [2020-10-12 20:22:22,760 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-12 20:22:22,760 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:22:22,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:22:22,760 INFO L82 PathProgramCache]: Analyzing trace with hash -1968747959, now seen corresponding path program 1 times [2020-10-12 20:22:22,760 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:22:22,760 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1684948062] [2020-10-12 20:22:22,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:22:22,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:22:22,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:22:22,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:22:22,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:22:22,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:22:22,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:22:23,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:22:23,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:22:23,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:22:23,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:22:23,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:22:27,787 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:22:27,787 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-12 20:22:27,787 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-12 20:22:27,787 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-12 20:22:27,788 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:22:27,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 20:22:27,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 20:22:27,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-12 20:22:27,788 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:22:28,017 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-12 20:22:28,018 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:22:28,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:22:28,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:22:28,033 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:22:28,033 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:22:28,033 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:22:28,033 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-12 20:22:28,034 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:22:28,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 20:22:28,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:22:28,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 20:22:28,034 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:22:28,051 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 20:22:28,051 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1684948062] [2020-10-12 20:22:28,052 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 20:22:28,052 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-12 20:22:28,052 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922306528] [2020-10-12 20:22:28,052 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 20:22:28,052 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:22:28,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 20:22:28,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-12 20:22:28,053 INFO L87 Difference]: Start difference. First operand 169508 states and 273930 transitions. Second operand 8 states. [2020-10-12 20:22:28,268 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 171