/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=NARROWEST --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.3.4.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 14:59:32,130 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 14:59:32,133 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 14:59:32,174 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 14:59:32,174 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 14:59:32,186 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 14:59:32,188 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 14:59:32,191 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 14:59:32,194 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 14:59:32,196 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 14:59:32,199 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 14:59:32,200 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 14:59:32,200 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 14:59:32,203 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 14:59:32,206 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 14:59:32,207 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 14:59:32,209 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 14:59:32,210 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 14:59:32,211 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 14:59:32,218 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 14:59:32,221 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 14:59:32,222 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 14:59:32,223 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 14:59:32,223 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 14:59:32,228 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 14:59:32,228 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 14:59:32,228 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 14:59:32,231 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 14:59:32,231 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 14:59:32,233 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 14:59:32,233 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 14:59:32,234 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 14:59:32,235 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 14:59:32,236 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 14:59:32,237 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 14:59:32,237 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 14:59:32,238 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 14:59:32,238 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 14:59:32,238 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 14:59:32,239 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 14:59:32,240 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 14:59:32,241 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 [2020-10-13 14:59:32,281 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 14:59:32,281 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 14:59:32,283 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 14:59:32,283 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 14:59:32,284 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 14:59:32,284 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 14:59:32,284 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 14:59:32,284 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 14:59:32,285 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 14:59:32,285 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 14:59:32,286 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 14:59:32,286 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 14:59:32,286 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 14:59:32,287 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 14:59:32,287 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 14:59:32,287 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 14:59:32,287 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 14:59:32,287 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 14:59:32,288 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 14:59:32,288 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 14:59:32,288 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 14:59:32,288 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 14:59:32,288 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 14:59:32,289 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 14:59:32,289 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 14:59:32,289 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 14:59:32,289 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 14:59:32,289 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 14:59:32,289 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 14:59:32,290 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=NARROWEST;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=NARROWEST;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=NARROWEST;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=NARROWEST;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=NARROWEST;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=NARROWEST;log-additional-information=true;unknown-allowed=true; [2020-10-13 14:59:32,563 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 14:59:32,575 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 14:59:32,579 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 14:59:32,580 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 14:59:32,581 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 14:59:32,581 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.4.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-13 14:59:32,660 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/848da184c/6e91b3fc2b1047b1b9d639cd7c4d1be1/FLAG0639c3f04 [2020-10-13 14:59:33,104 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 14:59:33,105 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.4.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-13 14:59:33,122 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/848da184c/6e91b3fc2b1047b1b9d639cd7c4d1be1/FLAG0639c3f04 [2020-10-13 14:59:33,476 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/848da184c/6e91b3fc2b1047b1b9d639cd7c4d1be1 [2020-10-13 14:59:33,484 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 14:59:33,486 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 14:59:33,487 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 14:59:33,487 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 14:59:33,490 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 14:59:33,491 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 02:59:33" (1/1) ... [2020-10-13 14:59:33,494 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3afd2ce4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:59:33, skipping insertion in model container [2020-10-13 14:59:33,494 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 02:59:33" (1/1) ... [2020-10-13 14:59:33,503 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 14:59:33,566 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 14:59:34,048 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 14:59:34,065 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 14:59:34,201 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 14:59:34,221 INFO L208 MainTranslator]: Completed translation [2020-10-13 14:59:34,221 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:59:34 WrapperNode [2020-10-13 14:59:34,221 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 14:59:34,222 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 14:59:34,222 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 14:59:34,222 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 14:59:34,238 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:59:34" (1/1) ... [2020-10-13 14:59:34,238 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:59:34" (1/1) ... [2020-10-13 14:59:34,251 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:59:34" (1/1) ... [2020-10-13 14:59:34,252 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:59:34" (1/1) ... [2020-10-13 14:59:34,269 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:59:34" (1/1) ... [2020-10-13 14:59:34,282 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:59:34" (1/1) ... [2020-10-13 14:59:34,285 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:59:34" (1/1) ... [2020-10-13 14:59:34,291 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 14:59:34,291 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 14:59:34,291 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 14:59:34,292 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 14:59:34,293 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:59:34" (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 [2020-10-13 14:59:34,374 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 14:59:34,375 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 14:59:34,375 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-13 14:59:34,375 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 14:59:34,375 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 14:59:34,375 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-13 14:59:34,375 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-10-13 14:59:34,376 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-13 14:59:34,376 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-13 14:59:34,376 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-13 14:59:34,376 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-13 14:59:34,376 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-13 14:59:34,376 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-13 14:59:34,377 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-13 14:59:34,377 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-13 14:59:34,377 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-13 14:59:34,377 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-13 14:59:34,377 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-13 14:59:34,378 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 14:59:34,378 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 14:59:34,378 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 14:59:35,220 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 14:59:35,220 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-13 14:59:35,226 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 02:59:35 BoogieIcfgContainer [2020-10-13 14:59:35,226 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 14:59:35,227 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 14:59:35,228 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 14:59:35,231 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 14:59:35,231 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 02:59:33" (1/3) ... [2020-10-13 14:59:35,232 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f820c0f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 02:59:35, skipping insertion in model container [2020-10-13 14:59:35,233 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:59:34" (2/3) ... [2020-10-13 14:59:35,233 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f820c0f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 02:59:35, skipping insertion in model container [2020-10-13 14:59:35,233 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 02:59:35" (3/3) ... [2020-10-13 14:59:35,235 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.3.4.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-13 14:59:35,246 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 14:59:35,255 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 14:59:35,269 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 14:59:35,296 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 14:59:35,297 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 14:59:35,297 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 14:59:35,297 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 14:59:35,297 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 14:59:35,298 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 14:59:35,298 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 14:59:35,298 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 14:59:35,321 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states. [2020-10-13 14:59:35,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-13 14:59:35,333 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:59:35,335 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] [2020-10-13 14:59:35,335 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:59:35,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:59:35,342 INFO L82 PathProgramCache]: Analyzing trace with hash 1725986399, now seen corresponding path program 1 times [2020-10-13 14:59:35,351 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:59:35,352 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1836016433] [2020-10-13 14:59:35,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:59:35,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:59:35,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:59:36,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:59:36,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:59:36,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:59:37,971 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:59:37,972 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-13 14:59:37,972 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 14:59:37,972 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2219 [2020-10-13 14:59:37,975 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:59:37,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 14:59:37,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 42 [2020-10-13 14:59:37,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-13 14:59:37,976 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-13 14:59:38,306 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-13 14:59:38,309 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:59:38,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:59:38,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:59:38,334 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:59:38,335 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:59:38,335 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:59:38,335 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-13 14:59:38,336 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:59:38,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:59:38,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:59:38,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:59:38,337 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 14:59:38,374 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:59:38,375 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1836016433] [2020-10-13 14:59:38,378 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:59:38,378 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-13 14:59:38,380 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950375296] [2020-10-13 14:59:38,386 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 14:59:38,387 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:59:38,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 14:59:38,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-13 14:59:38,413 INFO L87 Difference]: Start difference. First operand 160 states. Second operand 6 states. [2020-10-13 14:59:38,872 WARN L193 SmtUtils]: Spent 362.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-13 14:59:40,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:59:40,224 INFO L93 Difference]: Finished difference Result 746 states and 1238 transitions. [2020-10-13 14:59:40,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-13 14:59:40,226 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 66 [2020-10-13 14:59:40,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:59:40,247 INFO L225 Difference]: With dead ends: 746 [2020-10-13 14:59:40,248 INFO L226 Difference]: Without dead ends: 631 [2020-10-13 14:59:40,252 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 [2020-10-13 14:59:40,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 631 states. [2020-10-13 14:59:40,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 631 to 249. [2020-10-13 14:59:40,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 249 states. [2020-10-13 14:59:40,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 392 transitions. [2020-10-13 14:59:40,327 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 392 transitions. Word has length 66 [2020-10-13 14:59:40,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:59:40,328 INFO L479 AbstractCegarLoop]: Abstraction has 249 states and 392 transitions. [2020-10-13 14:59:40,328 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 14:59:40,328 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 392 transitions. [2020-10-13 14:59:40,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-13 14:59:40,331 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:59:40,332 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] [2020-10-13 14:59:40,332 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 14:59:40,332 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:59:40,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:59:40,333 INFO L82 PathProgramCache]: Analyzing trace with hash 1904360380, now seen corresponding path program 1 times [2020-10-13 14:59:40,333 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:59:40,334 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1361647278] [2020-10-13 14:59:40,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:59:40,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:59:40,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:59:40,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:59:40,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:59:40,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:59:41,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:59:43,139 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:59:43,140 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-13 14:59:43,140 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 14:59:43,140 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2755 [2020-10-13 14:59:43,140 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:59:43,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 14:59:43,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-10-13 14:59:43,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-13 14:59:43,141 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:59:43,591 WARN L193 SmtUtils]: Spent 324.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-13 14:59:43,592 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:59:43,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:59:43,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:59:43,609 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:59:43,609 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:59:43,610 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:59:43,610 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-13 14:59:43,618 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:59:43,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:59:43,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:59:43,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:59:43,621 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-13 14:59:43,647 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:59:43,648 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1361647278] [2020-10-13 14:59:43,649 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:59:43,649 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-13 14:59:43,649 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681074314] [2020-10-13 14:59:43,651 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 14:59:43,652 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:59:43,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 14:59:43,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-13 14:59:43,652 INFO L87 Difference]: Start difference. First operand 249 states and 392 transitions. Second operand 7 states. [2020-10-13 14:59:43,925 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 171 [2020-10-13 14:59:45,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:59:45,264 INFO L93 Difference]: Finished difference Result 1585 states and 2595 transitions. [2020-10-13 14:59:45,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-13 14:59:45,265 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 67 [2020-10-13 14:59:45,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:59:45,273 INFO L225 Difference]: With dead ends: 1585 [2020-10-13 14:59:45,273 INFO L226 Difference]: Without dead ends: 1397 [2020-10-13 14:59:45,276 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-10-13 14:59:45,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1397 states. [2020-10-13 14:59:45,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1397 to 742. [2020-10-13 14:59:45,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 742 states. [2020-10-13 14:59:45,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 742 states to 742 states and 1205 transitions. [2020-10-13 14:59:45,339 INFO L78 Accepts]: Start accepts. Automaton has 742 states and 1205 transitions. Word has length 67 [2020-10-13 14:59:45,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:59:45,340 INFO L479 AbstractCegarLoop]: Abstraction has 742 states and 1205 transitions. [2020-10-13 14:59:45,340 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 14:59:45,340 INFO L276 IsEmpty]: Start isEmpty. Operand 742 states and 1205 transitions. [2020-10-13 14:59:45,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-13 14:59:45,343 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:59:45,343 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] [2020-10-13 14:59:45,343 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 14:59:45,343 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:59:45,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:59:45,344 INFO L82 PathProgramCache]: Analyzing trace with hash -1151422778, now seen corresponding path program 1 times [2020-10-13 14:59:45,344 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:59:45,344 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1680073393] [2020-10-13 14:59:45,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:59:45,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:59:45,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:59:45,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:59:45,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:59:45,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:59:45,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:59:47,473 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:59:47,474 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-13 14:59:47,474 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 14:59:47,474 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2096 [2020-10-13 14:59:47,474 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:59:47,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 14:59:47,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-10-13 14:59:47,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-13 14:59:47,475 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:59:47,712 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-13 14:59:47,713 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:59:47,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:59:47,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:59:47,730 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:59:47,730 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:59:47,731 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:59:47,731 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-13 14:59:47,731 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:59:47,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:59:47,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:59:47,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:59:47,732 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:59:47,747 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:59:47,748 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1680073393] [2020-10-13 14:59:47,748 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:59:47,748 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 14:59:47,749 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833728778] [2020-10-13 14:59:47,749 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 14:59:47,749 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:59:47,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 14:59:47,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:59:47,750 INFO L87 Difference]: Start difference. First operand 742 states and 1205 transitions. Second operand 5 states. [2020-10-13 14:59:47,996 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2020-10-13 14:59:48,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:59:48,835 INFO L93 Difference]: Finished difference Result 2611 states and 4294 transitions. [2020-10-13 14:59:48,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 14:59:48,836 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 68 [2020-10-13 14:59:48,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:59:48,876 INFO L225 Difference]: With dead ends: 2611 [2020-10-13 14:59:48,876 INFO L226 Difference]: Without dead ends: 1992 [2020-10-13 14:59:48,880 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 [2020-10-13 14:59:48,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1992 states. [2020-10-13 14:59:48,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1992 to 1364. [2020-10-13 14:59:48,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1364 states. [2020-10-13 14:59:48,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1364 states to 1364 states and 2229 transitions. [2020-10-13 14:59:48,977 INFO L78 Accepts]: Start accepts. Automaton has 1364 states and 2229 transitions. Word has length 68 [2020-10-13 14:59:48,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:59:48,977 INFO L479 AbstractCegarLoop]: Abstraction has 1364 states and 2229 transitions. [2020-10-13 14:59:48,977 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 14:59:48,977 INFO L276 IsEmpty]: Start isEmpty. Operand 1364 states and 2229 transitions. [2020-10-13 14:59:48,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-13 14:59:48,979 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:59:48,979 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] [2020-10-13 14:59:48,980 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 14:59:48,980 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:59:48,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:59:48,980 INFO L82 PathProgramCache]: Analyzing trace with hash -1386862141, now seen corresponding path program 1 times [2020-10-13 14:59:48,981 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:59:48,981 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1983202035] [2020-10-13 14:59:48,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:59:49,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:59:49,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:59:49,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:59:49,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:59:49,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:59:49,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:59:51,279 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:59:51,279 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-13 14:59:51,280 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 14:59:51,280 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2268 [2020-10-13 14:59:51,280 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:59:51,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 14:59:51,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 44 [2020-10-13 14:59:51,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-13 14:59:51,281 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:59:51,498 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-13 14:59:51,499 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:59:51,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:59:51,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:59:51,514 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:59:51,515 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:59:51,515 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:59:51,515 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-13 14:59:51,515 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:59:51,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:59:51,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:59:51,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:59:51,516 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:59:51,530 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:59:51,530 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1983202035] [2020-10-13 14:59:51,531 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:59:51,531 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 14:59:51,531 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101754536] [2020-10-13 14:59:51,532 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 14:59:51,532 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:59:51,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 14:59:51,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:59:51,532 INFO L87 Difference]: Start difference. First operand 1364 states and 2229 transitions. Second operand 5 states. [2020-10-13 14:59:51,743 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2020-10-13 14:59:52,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:59:52,661 INFO L93 Difference]: Finished difference Result 5051 states and 8310 transitions. [2020-10-13 14:59:52,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 14:59:52,661 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 69 [2020-10-13 14:59:52,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:59:52,682 INFO L225 Difference]: With dead ends: 5051 [2020-10-13 14:59:52,682 INFO L226 Difference]: Without dead ends: 3822 [2020-10-13 14:59:52,687 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 [2020-10-13 14:59:52,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3822 states. [2020-10-13 14:59:52,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3822 to 2577. [2020-10-13 14:59:52,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2577 states. [2020-10-13 14:59:52,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2577 states to 2577 states and 4219 transitions. [2020-10-13 14:59:52,937 INFO L78 Accepts]: Start accepts. Automaton has 2577 states and 4219 transitions. Word has length 69 [2020-10-13 14:59:52,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:59:52,937 INFO L479 AbstractCegarLoop]: Abstraction has 2577 states and 4219 transitions. [2020-10-13 14:59:52,937 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 14:59:52,937 INFO L276 IsEmpty]: Start isEmpty. Operand 2577 states and 4219 transitions. [2020-10-13 14:59:52,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-13 14:59:52,939 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:59:52,939 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] [2020-10-13 14:59:52,940 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 14:59:52,940 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:59:52,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:59:52,940 INFO L82 PathProgramCache]: Analyzing trace with hash 1470676787, now seen corresponding path program 1 times [2020-10-13 14:59:52,940 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:59:52,941 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [177233484] [2020-10-13 14:59:52,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:59:52,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:59:52,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:59:53,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:59:53,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:59:53,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:59:54,247 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:59:54,247 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-13 14:59:54,248 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 14:59:54,248 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1280 [2020-10-13 14:59:54,248 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:59:54,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:59:54,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 30 [2020-10-13 14:59:54,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-13 14:59:54,249 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 14:59:54,494 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-13 14:59:54,495 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:59:54,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:59:54,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:59:54,508 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:59:54,508 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:59:54,508 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:59:54,508 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-13 14:59:54,509 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:59:54,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:59:54,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:59:54,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:59:54,509 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:59:54,529 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:59:54,530 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [177233484] [2020-10-13 14:59:54,530 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:59:54,530 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:59:54,530 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587893850] [2020-10-13 14:59:54,531 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:59:54,531 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:59:54,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:59:54,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:59:54,532 INFO L87 Difference]: Start difference. First operand 2577 states and 4219 transitions. Second operand 4 states. [2020-10-13 14:59:54,744 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2020-10-13 14:59:55,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:59:55,715 INFO L93 Difference]: Finished difference Result 6956 states and 11383 transitions. [2020-10-13 14:59:55,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 14:59:55,716 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 71 [2020-10-13 14:59:55,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:59:55,740 INFO L225 Difference]: With dead ends: 6956 [2020-10-13 14:59:55,740 INFO L226 Difference]: Without dead ends: 4456 [2020-10-13 14:59:55,751 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 [2020-10-13 14:59:55,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4456 states. [2020-10-13 14:59:56,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4456 to 4426. [2020-10-13 14:59:56,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4426 states. [2020-10-13 14:59:56,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4426 states to 4426 states and 7143 transitions. [2020-10-13 14:59:56,083 INFO L78 Accepts]: Start accepts. Automaton has 4426 states and 7143 transitions. Word has length 71 [2020-10-13 14:59:56,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:59:56,084 INFO L479 AbstractCegarLoop]: Abstraction has 4426 states and 7143 transitions. [2020-10-13 14:59:56,084 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:59:56,084 INFO L276 IsEmpty]: Start isEmpty. Operand 4426 states and 7143 transitions. [2020-10-13 14:59:56,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-13 14:59:56,086 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:59:56,086 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] [2020-10-13 14:59:56,086 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 14:59:56,087 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:59:56,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:59:56,087 INFO L82 PathProgramCache]: Analyzing trace with hash -657384593, now seen corresponding path program 1 times [2020-10-13 14:59:56,087 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:59:56,087 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [328126224] [2020-10-13 14:59:56,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:59:56,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:59:56,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:59:56,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:59:56,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:59:56,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:59:56,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:59:59,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:59:59,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:01,119 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:00:01,120 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-13 15:00:01,120 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 15:00:01,120 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-13 15:00:01,121 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:00:01,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 15:00:01,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 48 [2020-10-13 15:00:01,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-13 15:00:01,121 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:00:01,315 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-13 15:00:01,315 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 15:00:01,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:00:01,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:01,328 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:00:01,328 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 15:00:01,329 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:00:01,329 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-13 15:00:01,329 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:00:01,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:00:01,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:00:01,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:00:01,330 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:00:01,342 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 15:00:01,342 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [328126224] [2020-10-13 15:00:01,343 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 15:00:01,343 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 15:00:01,343 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132625419] [2020-10-13 15:00:01,344 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 15:00:01,344 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 15:00:01,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 15:00:01,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 15:00:01,345 INFO L87 Difference]: Start difference. First operand 4426 states and 7143 transitions. Second operand 4 states. [2020-10-13 15:00:01,547 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2020-10-13 15:00:02,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 15:00:02,770 INFO L93 Difference]: Finished difference Result 10450 states and 16925 transitions. [2020-10-13 15:00:02,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 15:00:02,771 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 72 [2020-10-13 15:00:02,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 15:00:02,803 INFO L225 Difference]: With dead ends: 10450 [2020-10-13 15:00:02,803 INFO L226 Difference]: Without dead ends: 6150 [2020-10-13 15:00:02,815 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 [2020-10-13 15:00:02,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6150 states. [2020-10-13 15:00:03,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6150 to 6148. [2020-10-13 15:00:03,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6148 states. [2020-10-13 15:00:03,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6148 states to 6148 states and 9938 transitions. [2020-10-13 15:00:03,235 INFO L78 Accepts]: Start accepts. Automaton has 6148 states and 9938 transitions. Word has length 72 [2020-10-13 15:00:03,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 15:00:03,236 INFO L479 AbstractCegarLoop]: Abstraction has 6148 states and 9938 transitions. [2020-10-13 15:00:03,236 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 15:00:03,236 INFO L276 IsEmpty]: Start isEmpty. Operand 6148 states and 9938 transitions. [2020-10-13 15:00:03,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-13 15:00:03,243 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 15:00:03,243 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] [2020-10-13 15:00:03,244 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-13 15:00:03,244 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 15:00:03,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 15:00:03,244 INFO L82 PathProgramCache]: Analyzing trace with hash 84467570, now seen corresponding path program 1 times [2020-10-13 15:00:03,245 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 15:00:03,246 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [34939171] [2020-10-13 15:00:03,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 15:00:03,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:00:03,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:03,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:03,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:03,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:04,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:06,509 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:00:06,509 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-13 15:00:06,509 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 15:00:06,509 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3232 [2020-10-13 15:00:06,510 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:00:06,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 15:00:06,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-13 15:00:06,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-13 15:00:06,510 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:00:06,768 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-13 15:00:06,770 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 15:00:06,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:00:06,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:06,791 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:00:06,791 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 15:00:06,791 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:00:06,792 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-13 15:00:06,792 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:00:06,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:00:06,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:00:06,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:00:06,794 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 15:00:06,823 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 15:00:06,823 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [34939171] [2020-10-13 15:00:06,824 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 15:00:06,824 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 15:00:06,824 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785015047] [2020-10-13 15:00:06,825 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 15:00:06,825 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 15:00:06,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 15:00:06,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 15:00:06,826 INFO L87 Difference]: Start difference. First operand 6148 states and 9938 transitions. Second operand 4 states. [2020-10-13 15:00:07,102 WARN L193 SmtUtils]: Spent 237.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2020-10-13 15:00:08,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 15:00:08,339 INFO L93 Difference]: Finished difference Result 14911 states and 24084 transitions. [2020-10-13 15:00:08,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 15:00:08,340 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 73 [2020-10-13 15:00:08,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 15:00:08,391 INFO L225 Difference]: With dead ends: 14911 [2020-10-13 15:00:08,392 INFO L226 Difference]: Without dead ends: 8856 [2020-10-13 15:00:08,411 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 15:00:08,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8856 states. [2020-10-13 15:00:09,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8856 to 8812. [2020-10-13 15:00:09,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8812 states. [2020-10-13 15:00:09,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8812 states to 8812 states and 14147 transitions. [2020-10-13 15:00:09,099 INFO L78 Accepts]: Start accepts. Automaton has 8812 states and 14147 transitions. Word has length 73 [2020-10-13 15:00:09,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 15:00:09,099 INFO L479 AbstractCegarLoop]: Abstraction has 8812 states and 14147 transitions. [2020-10-13 15:00:09,099 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 15:00:09,100 INFO L276 IsEmpty]: Start isEmpty. Operand 8812 states and 14147 transitions. [2020-10-13 15:00:09,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-13 15:00:09,101 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 15:00:09,101 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] [2020-10-13 15:00:09,101 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-13 15:00:09,102 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 15:00:09,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 15:00:09,102 INFO L82 PathProgramCache]: Analyzing trace with hash -908075202, now seen corresponding path program 1 times [2020-10-13 15:00:09,102 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 15:00:09,103 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1762401330] [2020-10-13 15:00:09,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 15:00:09,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:00:09,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:09,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:09,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:09,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:09,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:09,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:11,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:11,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:14,132 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:00:14,132 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-13 15:00:14,132 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-13 15:00:14,132 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-13 15:00:14,133 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:00:14,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 15:00:14,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 49 [2020-10-13 15:00:14,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-13 15:00:14,133 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:00:14,380 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-13 15:00:14,381 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 15:00:14,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:00:14,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:14,398 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:00:14,399 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 15:00:14,399 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:00:14,399 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-13 15:00:14,400 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:00:14,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:00:14,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:00:14,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:00:14,401 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 15:00:14,421 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 15:00:14,428 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1762401330] [2020-10-13 15:00:14,428 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 15:00:14,428 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 15:00:14,429 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752859769] [2020-10-13 15:00:14,429 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 15:00:14,430 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 15:00:14,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 15:00:14,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 15:00:14,431 INFO L87 Difference]: Start difference. First operand 8812 states and 14147 transitions. Second operand 4 states. [2020-10-13 15:00:14,715 WARN L193 SmtUtils]: Spent 244.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2020-10-13 15:00:16,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 15:00:16,108 INFO L93 Difference]: Finished difference Result 18882 states and 30377 transitions. [2020-10-13 15:00:16,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 15:00:16,108 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 74 [2020-10-13 15:00:16,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 15:00:16,144 INFO L225 Difference]: With dead ends: 18882 [2020-10-13 15:00:16,144 INFO L226 Difference]: Without dead ends: 12827 [2020-10-13 15:00:16,159 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 15:00:16,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12827 states. [2020-10-13 15:00:16,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12827 to 12825. [2020-10-13 15:00:16,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12825 states. [2020-10-13 15:00:16,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12825 states to 12825 states and 20483 transitions. [2020-10-13 15:00:16,783 INFO L78 Accepts]: Start accepts. Automaton has 12825 states and 20483 transitions. Word has length 74 [2020-10-13 15:00:16,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 15:00:16,784 INFO L479 AbstractCegarLoop]: Abstraction has 12825 states and 20483 transitions. [2020-10-13 15:00:16,784 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 15:00:16,784 INFO L276 IsEmpty]: Start isEmpty. Operand 12825 states and 20483 transitions. [2020-10-13 15:00:16,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-13 15:00:16,786 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 15:00:16,786 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 15:00:16,787 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-13 15:00:16,787 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 15:00:16,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 15:00:16,787 INFO L82 PathProgramCache]: Analyzing trace with hash -2006242383, now seen corresponding path program 1 times [2020-10-13 15:00:16,788 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 15:00:16,788 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1899113705] [2020-10-13 15:00:16,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 15:00:16,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:00:16,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:16,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:16,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:16,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:17,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:18,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:21,813 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:00:21,813 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-13 15:00:21,813 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 15:00:21,813 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-13 15:00:21,813 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:00:21,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 15:00:21,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 42 [2020-10-13 15:00:21,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-13 15:00:21,814 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:00:22,084 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-13 15:00:22,085 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 15:00:22,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:00:22,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:22,116 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:00:22,116 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 15:00:22,116 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:00:22,117 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-13 15:00:22,117 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:00:22,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:00:22,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:00:22,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:00:22,118 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 15:00:22,146 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 15:00:22,146 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1899113705] [2020-10-13 15:00:22,147 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 15:00:22,147 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-13 15:00:22,148 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905492576] [2020-10-13 15:00:22,148 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 15:00:22,149 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 15:00:22,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 15:00:22,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-13 15:00:22,150 INFO L87 Difference]: Start difference. First operand 12825 states and 20483 transitions. Second operand 6 states. [2020-10-13 15:00:22,479 WARN L193 SmtUtils]: Spent 263.00 ms on a formula simplification that was a NOOP. DAG size: 174 [2020-10-13 15:00:24,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 15:00:24,593 INFO L93 Difference]: Finished difference Result 38314 states and 61265 transitions. [2020-10-13 15:00:24,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-13 15:00:24,593 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 75 [2020-10-13 15:00:24,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 15:00:24,666 INFO L225 Difference]: With dead ends: 38314 [2020-10-13 15:00:24,666 INFO L226 Difference]: Without dead ends: 25593 [2020-10-13 15:00:24,689 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 [2020-10-13 15:00:24,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25593 states. [2020-10-13 15:00:25,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25593 to 12825. [2020-10-13 15:00:25,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12825 states. [2020-10-13 15:00:25,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12825 states to 12825 states and 20423 transitions. [2020-10-13 15:00:25,455 INFO L78 Accepts]: Start accepts. Automaton has 12825 states and 20423 transitions. Word has length 75 [2020-10-13 15:00:25,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 15:00:25,456 INFO L479 AbstractCegarLoop]: Abstraction has 12825 states and 20423 transitions. [2020-10-13 15:00:25,456 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 15:00:25,456 INFO L276 IsEmpty]: Start isEmpty. Operand 12825 states and 20423 transitions. [2020-10-13 15:00:25,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-13 15:00:25,456 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 15:00:25,457 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 15:00:25,457 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-13 15:00:25,457 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 15:00:25,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 15:00:25,457 INFO L82 PathProgramCache]: Analyzing trace with hash -709289507, now seen corresponding path program 1 times [2020-10-13 15:00:25,457 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 15:00:25,457 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1901392486] [2020-10-13 15:00:25,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 15:00:25,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:00:25,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:25,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:25,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:25,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:25,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:25,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:27,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:28,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:30,489 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:00:30,489 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-13 15:00:30,489 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-13 15:00:30,489 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 15:00:30,489 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:00:30,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 15:00:30,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 50 [2020-10-13 15:00:30,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-13 15:00:30,490 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:00:30,682 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-13 15:00:30,683 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 15:00:30,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:00:30,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:30,693 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:00:30,693 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 15:00:30,693 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:00:30,693 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 15:00:30,693 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:00:30,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:00:30,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:00:30,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:00:30,694 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:00:30,707 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 15:00:30,708 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1901392486] [2020-10-13 15:00:30,708 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 15:00:30,708 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 15:00:30,709 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842223557] [2020-10-13 15:00:30,709 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 15:00:30,709 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 15:00:30,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 15:00:30,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 15:00:30,710 INFO L87 Difference]: Start difference. First operand 12825 states and 20423 transitions. Second operand 4 states. [2020-10-13 15:00:30,921 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2020-10-13 15:00:32,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 15:00:32,522 INFO L93 Difference]: Finished difference Result 33332 states and 52787 transitions. [2020-10-13 15:00:32,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 15:00:32,523 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 76 [2020-10-13 15:00:32,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 15:00:32,577 INFO L225 Difference]: With dead ends: 33332 [2020-10-13 15:00:32,577 INFO L226 Difference]: Without dead ends: 20602 [2020-10-13 15:00:32,597 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 [2020-10-13 15:00:32,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20602 states. [2020-10-13 15:00:33,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20602 to 20584. [2020-10-13 15:00:33,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20584 states. [2020-10-13 15:00:33,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20584 states to 20584 states and 32258 transitions. [2020-10-13 15:00:33,828 INFO L78 Accepts]: Start accepts. Automaton has 20584 states and 32258 transitions. Word has length 76 [2020-10-13 15:00:33,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 15:00:33,829 INFO L479 AbstractCegarLoop]: Abstraction has 20584 states and 32258 transitions. [2020-10-13 15:00:33,829 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 15:00:33,829 INFO L276 IsEmpty]: Start isEmpty. Operand 20584 states and 32258 transitions. [2020-10-13 15:00:33,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-13 15:00:33,829 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 15:00:33,829 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 15:00:33,830 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-13 15:00:33,830 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 15:00:33,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 15:00:33,830 INFO L82 PathProgramCache]: Analyzing trace with hash -1251421511, now seen corresponding path program 1 times [2020-10-13 15:00:33,830 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 15:00:33,831 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1918567917] [2020-10-13 15:00:33,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 15:00:33,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:00:33,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:33,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:33,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:33,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:34,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:36,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:38,856 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:00:38,857 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-13 15:00:38,857 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 15:00:38,857 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 15:00:38,857 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:00:38,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 15:00:38,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 45 [2020-10-13 15:00:38,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-13 15:00:38,858 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:00:39,089 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-13 15:00:39,090 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 15:00:39,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:00:39,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:39,099 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:00:39,099 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 15:00:39,099 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:00:39,099 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 15:00:39,099 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:00:39,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:00:39,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:00:39,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:00:39,100 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:00:39,120 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 15:00:39,121 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1918567917] [2020-10-13 15:00:39,121 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 15:00:39,121 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-13 15:00:39,121 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196945745] [2020-10-13 15:00:39,122 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 15:00:39,122 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 15:00:39,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 15:00:39,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-13 15:00:39,122 INFO L87 Difference]: Start difference. First operand 20584 states and 32258 transitions. Second operand 6 states. [2020-10-13 15:00:39,361 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 174 [2020-10-13 15:00:43,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 15:00:43,416 INFO L93 Difference]: Finished difference Result 97246 states and 152951 transitions. [2020-10-13 15:00:43,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-13 15:00:43,416 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 78 [2020-10-13 15:00:43,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 15:00:43,599 INFO L225 Difference]: With dead ends: 97246 [2020-10-13 15:00:43,600 INFO L226 Difference]: Without dead ends: 76741 [2020-10-13 15:00:43,645 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 [2020-10-13 15:00:43,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76741 states. [2020-10-13 15:00:46,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76741 to 38418. [2020-10-13 15:00:46,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38418 states. [2020-10-13 15:00:46,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38418 states to 38418 states and 59922 transitions. [2020-10-13 15:00:46,089 INFO L78 Accepts]: Start accepts. Automaton has 38418 states and 59922 transitions. Word has length 78 [2020-10-13 15:00:46,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 15:00:46,090 INFO L479 AbstractCegarLoop]: Abstraction has 38418 states and 59922 transitions. [2020-10-13 15:00:46,090 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 15:00:46,090 INFO L276 IsEmpty]: Start isEmpty. Operand 38418 states and 59922 transitions. [2020-10-13 15:00:46,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-13 15:00:46,090 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 15:00:46,090 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 15:00:46,091 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-13 15:00:46,091 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 15:00:46,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 15:00:46,091 INFO L82 PathProgramCache]: Analyzing trace with hash -141270450, now seen corresponding path program 1 times [2020-10-13 15:00:46,091 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 15:00:46,091 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1614268789] [2020-10-13 15:00:46,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 15:00:46,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:00:46,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:46,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:46,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:46,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:46,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:47,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:50,439 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:00:50,439 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-13 15:00:50,440 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 15:00:50,440 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4328 [2020-10-13 15:00:50,440 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:00:50,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 15:00:50,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 81 [2020-10-13 15:00:50,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-13 15:00:50,440 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:00:50,654 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-13 15:00:50,655 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 15:00:50,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:00:50,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:50,667 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:00:50,667 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 15:00:50,667 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:00:50,667 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-13 15:00:50,667 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:00:50,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:00:50,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:00:50,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:00:50,668 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:00:50,678 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 15:00:50,678 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1614268789] [2020-10-13 15:00:50,678 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 15:00:50,678 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 15:00:50,679 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086462681] [2020-10-13 15:00:50,679 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 15:00:50,679 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 15:00:50,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 15:00:50,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 15:00:50,680 INFO L87 Difference]: Start difference. First operand 38418 states and 59922 transitions. Second operand 5 states. [2020-10-13 15:00:55,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 15:00:55,315 INFO L93 Difference]: Finished difference Result 67043 states and 104151 transitions. [2020-10-13 15:00:55,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 15:00:55,317 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 79 [2020-10-13 15:00:55,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 15:00:55,425 INFO L225 Difference]: With dead ends: 67043 [2020-10-13 15:00:55,425 INFO L226 Difference]: Without dead ends: 67041 [2020-10-13 15:00:55,444 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-13 15:00:55,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67041 states. [2020-10-13 15:00:57,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67041 to 39114. [2020-10-13 15:00:57,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39114 states. [2020-10-13 15:00:58,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39114 states to 39114 states and 60606 transitions. [2020-10-13 15:00:58,030 INFO L78 Accepts]: Start accepts. Automaton has 39114 states and 60606 transitions. Word has length 79 [2020-10-13 15:00:58,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 15:00:58,030 INFO L479 AbstractCegarLoop]: Abstraction has 39114 states and 60606 transitions. [2020-10-13 15:00:58,030 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 15:00:58,031 INFO L276 IsEmpty]: Start isEmpty. Operand 39114 states and 60606 transitions. [2020-10-13 15:00:58,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-10-13 15:00:58,032 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 15:00:58,032 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 15:00:58,033 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-13 15:00:58,033 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 15:00:58,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 15:00:58,033 INFO L82 PathProgramCache]: Analyzing trace with hash -935778543, now seen corresponding path program 1 times [2020-10-13 15:00:58,033 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 15:00:58,034 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1210805347] [2020-10-13 15:00:58,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 15:00:58,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:00:58,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:58,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:58,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:58,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:58,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:58,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:58,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:00,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:00,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:00,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:00,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:00,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:03,064 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:01:03,064 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 109 [2020-10-13 15:01:03,064 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-13 15:01:03,064 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-13 15:01:03,065 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:01:03,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 15:01:03,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 66 [2020-10-13 15:01:03,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-13 15:01:03,065 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:01:03,275 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-13 15:01:03,276 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 15:01:03,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:01:03,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:03,286 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:01:03,286 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 15:01:03,287 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:01:03,287 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 15:01:03,287 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:01:03,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:01:03,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:01:03,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:01:03,287 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:01:03,302 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 15:01:03,302 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1210805347] [2020-10-13 15:01:03,302 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 15:01:03,302 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 15:01:03,303 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074242016] [2020-10-13 15:01:03,303 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 15:01:03,303 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 15:01:03,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 15:01:03,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 15:01:03,304 INFO L87 Difference]: Start difference. First operand 39114 states and 60606 transitions. Second operand 4 states. [2020-10-13 15:01:06,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 15:01:06,201 INFO L93 Difference]: Finished difference Result 70025 states and 108671 transitions. [2020-10-13 15:01:06,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 15:01:06,202 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 103 [2020-10-13 15:01:06,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 15:01:06,244 INFO L225 Difference]: With dead ends: 70025 [2020-10-13 15:01:06,244 INFO L226 Difference]: Without dead ends: 30990 [2020-10-13 15:01:06,282 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 15:01:06,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30990 states. [2020-10-13 15:01:07,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30990 to 30988. [2020-10-13 15:01:07,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30988 states. [2020-10-13 15:01:07,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30988 states to 30988 states and 47853 transitions. [2020-10-13 15:01:07,982 INFO L78 Accepts]: Start accepts. Automaton has 30988 states and 47853 transitions. Word has length 103 [2020-10-13 15:01:07,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 15:01:07,982 INFO L479 AbstractCegarLoop]: Abstraction has 30988 states and 47853 transitions. [2020-10-13 15:01:07,982 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 15:01:07,983 INFO L276 IsEmpty]: Start isEmpty. Operand 30988 states and 47853 transitions. [2020-10-13 15:01:07,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-10-13 15:01:07,984 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 15:01:07,984 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 15:01:07,984 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-13 15:01:07,985 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 15:01:07,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 15:01:07,985 INFO L82 PathProgramCache]: Analyzing trace with hash -508521921, now seen corresponding path program 1 times [2020-10-13 15:01:07,985 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 15:01:07,985 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1472912876] [2020-10-13 15:01:07,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 15:01:08,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:01:08,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:08,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:08,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:08,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:08,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:08,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:08,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:08,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:10,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:10,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:10,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:13,008 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:01:13,008 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 109 [2020-10-13 15:01:13,008 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-13 15:01:13,008 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-13 15:01:13,009 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:01:13,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 15:01:13,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 60 [2020-10-13 15:01:13,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-13 15:01:13,009 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:01:13,211 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-13 15:01:13,212 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 15:01:13,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:01:13,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:13,222 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:01:13,222 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 15:01:13,222 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:01:13,222 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 15:01:13,222 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:01:13,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:01:13,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:01:13,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:01:13,223 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:01:13,240 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 15:01:13,240 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1472912876] [2020-10-13 15:01:13,240 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 15:01:13,240 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 15:01:13,241 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270116425] [2020-10-13 15:01:13,241 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 15:01:13,241 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 15:01:13,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 15:01:13,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 15:01:13,242 INFO L87 Difference]: Start difference. First operand 30988 states and 47853 transitions. Second operand 4 states. [2020-10-13 15:01:14,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 15:01:14,910 INFO L93 Difference]: Finished difference Result 46534 states and 71931 transitions. [2020-10-13 15:01:14,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 15:01:14,911 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 103 [2020-10-13 15:01:14,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 15:01:14,930 INFO L225 Difference]: With dead ends: 46534 [2020-10-13 15:01:14,930 INFO L226 Difference]: Without dead ends: 15691 [2020-10-13 15:01:14,962 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 15:01:14,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15691 states. [2020-10-13 15:01:15,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15691 to 15689. [2020-10-13 15:01:15,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15689 states. [2020-10-13 15:01:15,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15689 states to 15689 states and 24063 transitions. [2020-10-13 15:01:15,844 INFO L78 Accepts]: Start accepts. Automaton has 15689 states and 24063 transitions. Word has length 103 [2020-10-13 15:01:15,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 15:01:15,844 INFO L479 AbstractCegarLoop]: Abstraction has 15689 states and 24063 transitions. [2020-10-13 15:01:15,844 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 15:01:15,844 INFO L276 IsEmpty]: Start isEmpty. Operand 15689 states and 24063 transitions. [2020-10-13 15:01:15,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-10-13 15:01:15,846 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 15:01:15,846 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 15:01:15,847 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-13 15:01:15,847 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 15:01:15,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 15:01:15,847 INFO L82 PathProgramCache]: Analyzing trace with hash 439183408, now seen corresponding path program 1 times [2020-10-13 15:01:15,847 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 15:01:15,848 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [205259781] [2020-10-13 15:01:15,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 15:01:15,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:01:15,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:15,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:15,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:15,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:15,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:16,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:16,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:17,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:17,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:17,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:20,876 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:01:20,876 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-10-13 15:01:20,876 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-13 15:01:20,876 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-13 15:01:20,876 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:01:20,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 15:01:20,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 32 [2020-10-13 15:01:20,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-13 15:01:20,877 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:01:21,064 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-13 15:01:21,065 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 15:01:21,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:01:21,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:21,076 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:01:21,076 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 15:01:21,076 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:01:21,076 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-13 15:01:21,076 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:01:21,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:01:21,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:01:21,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:01:21,077 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:01:21,091 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-13 15:01:21,092 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [205259781] [2020-10-13 15:01:21,092 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 15:01:21,092 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 15:01:21,092 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069640714] [2020-10-13 15:01:21,092 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 15:01:21,093 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 15:01:21,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 15:01:21,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 15:01:21,093 INFO L87 Difference]: Start difference. First operand 15689 states and 24063 transitions. Second operand 4 states. [2020-10-13 15:01:21,299 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2020-10-13 15:01:23,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 15:01:23,048 INFO L93 Difference]: Finished difference Result 35487 states and 54462 transitions. [2020-10-13 15:01:23,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 15:01:23,049 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 106 [2020-10-13 15:01:23,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 15:01:23,081 INFO L225 Difference]: With dead ends: 35487 [2020-10-13 15:01:23,081 INFO L226 Difference]: Without dead ends: 19906 [2020-10-13 15:01:23,101 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 [2020-10-13 15:01:23,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19906 states. [2020-10-13 15:01:24,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19906 to 19826. [2020-10-13 15:01:24,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19826 states. [2020-10-13 15:01:24,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19826 states to 19826 states and 30314 transitions. [2020-10-13 15:01:24,239 INFO L78 Accepts]: Start accepts. Automaton has 19826 states and 30314 transitions. Word has length 106 [2020-10-13 15:01:24,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 15:01:24,239 INFO L479 AbstractCegarLoop]: Abstraction has 19826 states and 30314 transitions. [2020-10-13 15:01:24,240 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 15:01:24,240 INFO L276 IsEmpty]: Start isEmpty. Operand 19826 states and 30314 transitions. [2020-10-13 15:01:24,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-10-13 15:01:24,241 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 15:01:24,242 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 15:01:24,242 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-13 15:01:24,242 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 15:01:24,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 15:01:24,242 INFO L82 PathProgramCache]: Analyzing trace with hash -1840264206, now seen corresponding path program 1 times [2020-10-13 15:01:24,243 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 15:01:24,243 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1212607061] [2020-10-13 15:01:24,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 15:01:24,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:01:24,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:24,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:24,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:24,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:24,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:24,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:24,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:24,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:25,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:26,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:26,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:26,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:26,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:29,278 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:01:29,279 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 116 [2020-10-13 15:01:29,279 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-13 15:01:29,279 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-13 15:01:29,279 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:01:29,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 15:01:29,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 15:01:29,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-13 15:01:29,280 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:01:29,546 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-13 15:01:29,547 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 15:01:29,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:01:29,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:29,560 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:01:29,560 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 15:01:29,560 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:01:29,560 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-13 15:01:29,560 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:01:29,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:01:29,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:01:29,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:01:29,561 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:01:29,578 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-13 15:01:29,579 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1212607061] [2020-10-13 15:01:29,579 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 15:01:29,579 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 15:01:29,579 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129364317] [2020-10-13 15:01:29,580 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 15:01:29,580 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 15:01:29,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 15:01:29,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 15:01:29,580 INFO L87 Difference]: Start difference. First operand 19826 states and 30314 transitions. Second operand 5 states. [2020-10-13 15:01:33,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 15:01:33,423 INFO L93 Difference]: Finished difference Result 58654 states and 89573 transitions. [2020-10-13 15:01:33,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 15:01:33,424 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 110 [2020-10-13 15:01:33,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 15:01:33,470 INFO L225 Difference]: With dead ends: 58654 [2020-10-13 15:01:33,470 INFO L226 Difference]: Without dead ends: 38857 [2020-10-13 15:01:33,487 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 [2020-10-13 15:01:33,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38857 states. [2020-10-13 15:01:36,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38857 to 38855. [2020-10-13 15:01:36,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38855 states. [2020-10-13 15:01:36,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38855 states to 38855 states and 59043 transitions. [2020-10-13 15:01:36,252 INFO L78 Accepts]: Start accepts. Automaton has 38855 states and 59043 transitions. Word has length 110 [2020-10-13 15:01:36,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 15:01:36,253 INFO L479 AbstractCegarLoop]: Abstraction has 38855 states and 59043 transitions. [2020-10-13 15:01:36,253 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 15:01:36,253 INFO L276 IsEmpty]: Start isEmpty. Operand 38855 states and 59043 transitions. [2020-10-13 15:01:36,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-10-13 15:01:36,255 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 15:01:36,255 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 15:01:36,255 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-13 15:01:36,255 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 15:01:36,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 15:01:36,255 INFO L82 PathProgramCache]: Analyzing trace with hash 2015271324, now seen corresponding path program 1 times [2020-10-13 15:01:36,256 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 15:01:36,256 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [294138843] [2020-10-13 15:01:36,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 15:01:36,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:01:36,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:36,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:36,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:36,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:36,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:36,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:36,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:36,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:38,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:38,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:38,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:41,270 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:01:41,270 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 117 [2020-10-13 15:01:41,270 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-13 15:01:41,270 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 15:01:41,270 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:01:41,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 15:01:41,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-13 15:01:41,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-13 15:01:41,271 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:01:41,460 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-13 15:01:41,461 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 15:01:41,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:01:41,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:41,470 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:01:41,471 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 15:01:41,471 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:01:41,471 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 15:01:41,471 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:01:41,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:01:41,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:01:41,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:01:41,471 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:01:41,483 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-10-13 15:01:41,483 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [294138843] [2020-10-13 15:01:41,483 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 15:01:41,484 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 15:01:41,484 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256868032] [2020-10-13 15:01:41,484 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 15:01:41,484 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 15:01:41,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 15:01:41,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 15:01:41,485 INFO L87 Difference]: Start difference. First operand 38855 states and 59043 transitions. Second operand 4 states. [2020-10-13 15:01:48,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 15:01:48,331 INFO L93 Difference]: Finished difference Result 116519 states and 177057 transitions. [2020-10-13 15:01:48,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 15:01:48,332 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 111 [2020-10-13 15:01:48,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 15:01:48,443 INFO L225 Difference]: With dead ends: 116519 [2020-10-13 15:01:48,443 INFO L226 Difference]: Without dead ends: 77696 [2020-10-13 15:01:48,480 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 15:01:48,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77696 states. [2020-10-13 15:01:51,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77696 to 38857. [2020-10-13 15:01:51,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38857 states. [2020-10-13 15:01:51,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38857 states to 38857 states and 59045 transitions. [2020-10-13 15:01:51,656 INFO L78 Accepts]: Start accepts. Automaton has 38857 states and 59045 transitions. Word has length 111 [2020-10-13 15:01:51,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 15:01:51,657 INFO L479 AbstractCegarLoop]: Abstraction has 38857 states and 59045 transitions. [2020-10-13 15:01:51,657 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 15:01:51,657 INFO L276 IsEmpty]: Start isEmpty. Operand 38857 states and 59045 transitions. [2020-10-13 15:01:51,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-10-13 15:01:51,659 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 15:01:51,659 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 15:01:51,659 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-13 15:01:51,659 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 15:01:51,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 15:01:51,660 INFO L82 PathProgramCache]: Analyzing trace with hash -414921677, now seen corresponding path program 1 times [2020-10-13 15:01:51,660 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 15:01:51,660 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1649893670] [2020-10-13 15:01:51,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 15:01:51,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:01:51,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:51,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:51,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:51,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:51,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:51,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:51,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:52,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:52,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:56,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:56,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:56,704 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:01:56,704 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 118 [2020-10-13 15:01:56,704 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-13 15:01:56,705 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5024 [2020-10-13 15:01:56,705 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:01:56,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 15:01:56,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-13 15:01:56,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-13 15:01:56,706 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:01:56,989 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-13 15:01:56,989 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 15:01:56,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:01:56,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:57,005 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:01:57,005 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 15:01:57,006 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:01:57,006 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-13 15:01:57,006 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:01:57,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:01:57,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:01:57,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:01:57,007 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:01:57,031 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-10-13 15:01:57,031 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1649893670] [2020-10-13 15:01:57,031 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 15:01:57,032 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 15:01:57,032 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608189921] [2020-10-13 15:01:57,034 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 15:01:57,035 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 15:01:57,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 15:01:57,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 15:01:57,035 INFO L87 Difference]: Start difference. First operand 38857 states and 59045 transitions. Second operand 5 states. [2020-10-13 15:02:00,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 15:02:00,499 INFO L93 Difference]: Finished difference Result 77696 states and 118064 transitions. [2020-10-13 15:02:00,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 15:02:00,500 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 112 [2020-10-13 15:02:00,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 15:02:00,550 INFO L225 Difference]: With dead ends: 77696 [2020-10-13 15:02:00,551 INFO L226 Difference]: Without dead ends: 38857 [2020-10-13 15:02:00,584 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 [2020-10-13 15:02:00,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38857 states. [2020-10-13 15:02:03,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38857 to 38856. [2020-10-13 15:02:03,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38856 states. [2020-10-13 15:02:03,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38856 states to 38856 states and 59041 transitions. [2020-10-13 15:02:03,493 INFO L78 Accepts]: Start accepts. Automaton has 38856 states and 59041 transitions. Word has length 112 [2020-10-13 15:02:03,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 15:02:03,494 INFO L479 AbstractCegarLoop]: Abstraction has 38856 states and 59041 transitions. [2020-10-13 15:02:03,494 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 15:02:03,494 INFO L276 IsEmpty]: Start isEmpty. Operand 38856 states and 59041 transitions. [2020-10-13 15:02:03,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-10-13 15:02:03,497 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 15:02:03,498 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 15:02:03,498 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-13 15:02:03,498 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 15:02:03,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 15:02:03,498 INFO L82 PathProgramCache]: Analyzing trace with hash -2113299698, now seen corresponding path program 1 times [2020-10-13 15:02:03,499 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 15:02:03,499 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1437935228] [2020-10-13 15:02:03,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 15:02:03,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:02:03,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:02:03,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:02:03,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:02:03,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:02:03,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:02:03,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:02:03,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:02:03,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:02:04,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:02:07,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:02:07,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:02:08,537 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:02:08,537 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 118 [2020-10-13 15:02:08,537 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-13 15:02:08,538 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-13 15:02:08,538 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:02:08,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 15:02:08,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 15:02:08,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-13 15:02:08,538 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:02:08,744 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-13 15:02:08,745 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 15:02:08,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:02:08,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:02:08,754 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:02:08,754 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 15:02:08,754 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:02:08,754 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 15:02:08,755 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:02:08,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:02:08,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:02:08,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:02:08,755 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:02:08,767 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-10-13 15:02:08,767 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1437935228] [2020-10-13 15:02:08,767 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 15:02:08,768 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 15:02:08,768 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375581358] [2020-10-13 15:02:08,768 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 15:02:08,768 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 15:02:08,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 15:02:08,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 15:02:08,769 INFO L87 Difference]: Start difference. First operand 38856 states and 59041 transitions. Second operand 5 states. [2020-10-13 15:02:15,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 15:02:15,234 INFO L93 Difference]: Finished difference Result 113900 states and 172755 transitions. [2020-10-13 15:02:15,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 15:02:15,235 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 112 [2020-10-13 15:02:15,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 15:02:15,343 INFO L225 Difference]: With dead ends: 113900 [2020-10-13 15:02:15,343 INFO L226 Difference]: Without dead ends: 75083 [2020-10-13 15:02:15,385 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-13 15:02:15,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75083 states. [2020-10-13 15:02:21,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75083 to 75081. [2020-10-13 15:02:21,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75081 states. [2020-10-13 15:02:21,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75081 states to 75081 states and 113039 transitions. [2020-10-13 15:02:21,388 INFO L78 Accepts]: Start accepts. Automaton has 75081 states and 113039 transitions. Word has length 112 [2020-10-13 15:02:21,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 15:02:21,388 INFO L479 AbstractCegarLoop]: Abstraction has 75081 states and 113039 transitions. [2020-10-13 15:02:21,388 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 15:02:21,388 INFO L276 IsEmpty]: Start isEmpty. Operand 75081 states and 113039 transitions. [2020-10-13 15:02:21,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-10-13 15:02:21,392 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 15:02:21,392 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 15:02:21,393 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-13 15:02:21,393 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 15:02:21,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 15:02:21,393 INFO L82 PathProgramCache]: Analyzing trace with hash 97726577, now seen corresponding path program 1 times [2020-10-13 15:02:21,393 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 15:02:21,394 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1544474041] [2020-10-13 15:02:21,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 15:02:21,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:02:21,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:02:21,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:02:21,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:02:21,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:02:21,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:02:21,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:02:21,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:02:23,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:02:23,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:02:25,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:02:25,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:02:25,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:02:26,968 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:02:26,968 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 118 [2020-10-13 15:02:26,969 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-13 15:02:26,969 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5549 [2020-10-13 15:02:26,969 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:02:26,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 15:02:26,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 15:02:26,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-13 15:02:26,969 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:02:27,208 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-13 15:02:27,209 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 15:02:27,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:02:27,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:02:27,221 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:02:27,221 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 15:02:27,221 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:02:27,221 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-13 15:02:27,221 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:02:27,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:02:27,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:02:27,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:02:27,222 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:02:27,245 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-13 15:02:27,245 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1544474041] [2020-10-13 15:02:27,245 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 15:02:27,246 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 15:02:27,246 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456749170] [2020-10-13 15:02:27,246 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 15:02:27,246 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 15:02:27,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 15:02:27,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 15:02:27,247 INFO L87 Difference]: Start difference. First operand 75081 states and 113039 transitions. Second operand 5 states. [2020-10-13 15:02:37,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 15:02:37,786 INFO L93 Difference]: Finished difference Result 186794 states and 280812 transitions. [2020-10-13 15:02:37,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 15:02:37,787 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 112 [2020-10-13 15:02:37,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 15:02:37,940 INFO L225 Difference]: With dead ends: 186794 [2020-10-13 15:02:37,940 INFO L226 Difference]: Without dead ends: 111766 [2020-10-13 15:02:37,992 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 [2020-10-13 15:02:38,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111766 states. [2020-10-13 15:02:50,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111766 to 111764. [2020-10-13 15:02:50,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111764 states. [2020-10-13 15:02:50,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111764 states to 111764 states and 166703 transitions. [2020-10-13 15:02:50,434 INFO L78 Accepts]: Start accepts. Automaton has 111764 states and 166703 transitions. Word has length 112 [2020-10-13 15:02:50,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 15:02:50,434 INFO L479 AbstractCegarLoop]: Abstraction has 111764 states and 166703 transitions. [2020-10-13 15:02:50,434 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 15:02:50,434 INFO L276 IsEmpty]: Start isEmpty. Operand 111764 states and 166703 transitions. [2020-10-13 15:02:50,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-10-13 15:02:50,439 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 15:02:50,441 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 15:02:50,442 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-13 15:02:50,442 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 15:02:50,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 15:02:50,442 INFO L82 PathProgramCache]: Analyzing trace with hash -1542478171, now seen corresponding path program 1 times [2020-10-13 15:02:50,442 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 15:02:50,442 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [58065553] [2020-10-13 15:02:50,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 15:02:50,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:02:50,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:02:50,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:02:50,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:02:50,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:02:50,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:02:50,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:02:51,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:02:51,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:02:52,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:02:52,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:02:52,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:02:55,469 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:02:55,469 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 119 [2020-10-13 15:02:55,469 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-13 15:02:55,469 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-13 15:02:55,469 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:02:55,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 15:02:55,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 53 [2020-10-13 15:02:55,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-13 15:02:55,470 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:02:55,677 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-13 15:02:55,678 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 15:02:55,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:02:55,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:02:55,687 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:02:55,687 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 15:02:55,688 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:02:55,688 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 15:02:55,688 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:02:55,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:02:55,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:02:55,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:02:55,688 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:02:55,701 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-13 15:02:55,702 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [58065553] [2020-10-13 15:02:55,702 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 15:02:55,702 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 15:02:55,702 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405409883] [2020-10-13 15:02:55,703 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 15:02:55,703 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 15:02:55,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 15:02:55,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 15:02:55,703 INFO L87 Difference]: Start difference. First operand 111764 states and 166703 transitions. Second operand 4 states. [2020-10-13 15:03:10,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 15:03:10,101 INFO L93 Difference]: Finished difference Result 260909 states and 388876 transitions. [2020-10-13 15:03:10,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 15:03:10,102 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 113 [2020-10-13 15:03:10,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 15:03:10,321 INFO L225 Difference]: With dead ends: 260909 [2020-10-13 15:03:10,321 INFO L226 Difference]: Without dead ends: 149492 [2020-10-13 15:03:10,410 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 15:03:10,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149492 states.