/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=BIGGEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.4.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-12 20:02:26,229 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-12 20:02:26,233 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-12 20:02:26,275 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-12 20:02:26,275 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-12 20:02:26,283 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-12 20:02:26,285 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-12 20:02:26,288 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-12 20:02:26,291 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-12 20:02:26,294 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-12 20:02:26,295 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-12 20:02:26,298 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-12 20:02:26,298 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-12 20:02:26,300 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-12 20:02:26,301 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-12 20:02:26,302 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-12 20:02:26,308 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-12 20:02:26,309 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-12 20:02:26,310 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-12 20:02:26,312 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-12 20:02:26,313 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-12 20:02:26,314 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-12 20:02:26,315 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-12 20:02:26,316 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-12 20:02:26,318 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-12 20:02:26,318 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-12 20:02:26,319 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-12 20:02:26,319 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-12 20:02:26,320 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-12 20:02:26,321 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-12 20:02:26,321 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-12 20:02:26,322 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-12 20:02:26,322 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-12 20:02:26,323 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-12 20:02:26,324 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-12 20:02:26,324 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-12 20:02:26,325 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-12 20:02:26,325 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-12 20:02:26,325 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-12 20:02:26,326 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-12 20:02:26,327 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-12 20:02:26,328 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-12 20:02:26,350 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-12 20:02:26,351 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-12 20:02:26,352 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-12 20:02:26,352 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-12 20:02:26,352 INFO L138 SettingsManager]: * Use SBE=true [2020-10-12 20:02:26,353 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-12 20:02:26,353 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-12 20:02:26,353 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-12 20:02:26,353 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-12 20:02:26,353 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-12 20:02:26,353 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-12 20:02:26,354 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-12 20:02:26,354 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-12 20:02:26,354 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-12 20:02:26,354 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-12 20:02:26,354 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-12 20:02:26,355 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-12 20:02:26,355 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-12 20:02:26,355 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-12 20:02:26,355 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-12 20:02:26,355 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-12 20:02:26,356 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-12 20:02:26,356 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-12 20:02:26,356 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-12 20:02:26,356 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-12 20:02:26,356 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-12 20:02:26,357 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-12 20:02:26,357 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-12 20:02:26,357 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-12 20:02:26,357 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; [2020-10-12 20:02:26,701 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-12 20:02:26,720 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-12 20:02:26,726 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-12 20:02:26,728 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-12 20:02:26,729 INFO L275 PluginConnector]: CDTParser initialized [2020-10-12 20:02:26,729 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.4.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-10-12 20:02:26,812 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0bb60e636/1a6fc0c97db04cbfbdee5f657df3a6d8/FLAGee6aeb4ce [2020-10-12 20:02:27,393 INFO L306 CDTParser]: Found 1 translation units. [2020-10-12 20:02:27,394 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.4.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-10-12 20:02:27,411 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0bb60e636/1a6fc0c97db04cbfbdee5f657df3a6d8/FLAGee6aeb4ce [2020-10-12 20:02:27,659 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0bb60e636/1a6fc0c97db04cbfbdee5f657df3a6d8 [2020-10-12 20:02:27,669 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-12 20:02:27,670 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-12 20:02:27,672 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-12 20:02:27,672 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-12 20:02:27,676 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-12 20:02:27,677 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 08:02:27" (1/1) ... [2020-10-12 20:02:27,680 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@e0feae2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 08:02:27, skipping insertion in model container [2020-10-12 20:02:27,681 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 08:02:27" (1/1) ... [2020-10-12 20:02:27,689 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-12 20:02:27,752 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-12 20:02:28,173 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 20:02:28,186 INFO L203 MainTranslator]: Completed pre-run [2020-10-12 20:02:28,286 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 20:02:28,308 INFO L208 MainTranslator]: Completed translation [2020-10-12 20:02:28,308 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 08:02:28 WrapperNode [2020-10-12 20:02:28,308 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-12 20:02:28,309 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-12 20:02:28,309 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-12 20:02:28,309 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-12 20:02:28,328 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 08:02:28" (1/1) ... [2020-10-12 20:02:28,328 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 08:02:28" (1/1) ... [2020-10-12 20:02:28,342 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 08:02:28" (1/1) ... [2020-10-12 20:02:28,342 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 08:02:28" (1/1) ... [2020-10-12 20:02:28,359 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 08:02:28" (1/1) ... [2020-10-12 20:02:28,372 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 08:02:28" (1/1) ... [2020-10-12 20:02:28,376 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 08:02:28" (1/1) ... [2020-10-12 20:02:28,381 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-12 20:02:28,382 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-12 20:02:28,382 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-12 20:02:28,382 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-12 20:02:28,383 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 08:02:28" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-12 20:02:28,443 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-12 20:02:28,443 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-12 20:02:28,443 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-12 20:02:28,443 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-12 20:02:28,443 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-12 20:02:28,443 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-12 20:02:28,444 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-12 20:02:28,444 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-10-12 20:02:28,444 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-12 20:02:28,444 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-12 20:02:28,444 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-12 20:02:28,450 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-12 20:02:28,450 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-12 20:02:28,451 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-12 20:02:28,451 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-12 20:02:28,452 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-12 20:02:28,452 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-12 20:02:28,452 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-12 20:02:28,452 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-12 20:02:28,452 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-12 20:02:28,452 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-12 20:02:28,452 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-12 20:02:29,362 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-12 20:02:29,362 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-12 20:02:29,368 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 08:02:29 BoogieIcfgContainer [2020-10-12 20:02:29,369 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-12 20:02:29,370 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-12 20:02:29,370 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-12 20:02:29,374 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-12 20:02:29,374 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.10 08:02:27" (1/3) ... [2020-10-12 20:02:29,375 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d79d204 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 08:02:29, skipping insertion in model container [2020-10-12 20:02:29,375 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 08:02:28" (2/3) ... [2020-10-12 20:02:29,376 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d79d204 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 08:02:29, skipping insertion in model container [2020-10-12 20:02:29,376 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 08:02:29" (3/3) ... [2020-10-12 20:02:29,378 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.4.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-10-12 20:02:29,390 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-12 20:02:29,399 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-12 20:02:29,414 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-12 20:02:29,440 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-12 20:02:29,440 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-12 20:02:29,440 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-12 20:02:29,440 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-12 20:02:29,441 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-12 20:02:29,441 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-12 20:02:29,441 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-12 20:02:29,441 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-12 20:02:29,461 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states. [2020-10-12 20:02:29,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-12 20:02:29,471 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:02:29,472 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 20:02:29,473 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:02:29,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:02:29,479 INFO L82 PathProgramCache]: Analyzing trace with hash 1975084241, now seen corresponding path program 1 times [2020-10-12 20:02:29,489 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:02:29,489 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1115809568] [2020-10-12 20:02:29,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:02:29,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:02:29,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:02:30,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:02:30,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:02:31,622 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:02:31,622 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-12 20:02:31,623 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 20:02:31,623 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1854 [2020-10-12 20:02:31,626 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:02:31,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 20:02:31,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-12 20:02:31,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-12 20:02:31,627 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-12 20:02:31,918 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2020-10-12 20:02:31,920 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:02:31,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:02:31,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:02:31,945 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:02:31,945 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:02:31,945 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:02:31,946 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-12 20:02:31,946 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:02:31,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 20:02:31,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:02:31,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 20:02:31,947 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 20:02:31,972 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 20:02:31,972 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1115809568] [2020-10-12 20:02:31,974 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 20:02:31,975 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-12 20:02:31,976 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092135519] [2020-10-12 20:02:31,981 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 20:02:31,982 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:02:31,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 20:02:31,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-12 20:02:32,000 INFO L87 Difference]: Start difference. First operand 175 states. Second operand 7 states. [2020-10-12 20:02:32,243 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2020-10-12 20:02:33,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:02:33,125 INFO L93 Difference]: Finished difference Result 615 states and 989 transitions. [2020-10-12 20:02:33,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-12 20:02:33,127 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 67 [2020-10-12 20:02:33,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:02:33,147 INFO L225 Difference]: With dead ends: 615 [2020-10-12 20:02:33,148 INFO L226 Difference]: Without dead ends: 515 [2020-10-12 20:02:33,153 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2020-10-12 20:02:33,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 515 states. [2020-10-12 20:02:33,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 515 to 264. [2020-10-12 20:02:33,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 264 states. [2020-10-12 20:02:33,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 395 transitions. [2020-10-12 20:02:33,261 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 395 transitions. Word has length 67 [2020-10-12 20:02:33,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:02:33,263 INFO L479 AbstractCegarLoop]: Abstraction has 264 states and 395 transitions. [2020-10-12 20:02:33,264 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 20:02:33,264 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 395 transitions. [2020-10-12 20:02:33,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-12 20:02:33,271 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:02:33,271 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 20:02:33,272 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-12 20:02:33,272 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:02:33,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:02:33,273 INFO L82 PathProgramCache]: Analyzing trace with hash 836650623, now seen corresponding path program 1 times [2020-10-12 20:02:33,273 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:02:33,274 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1515834374] [2020-10-12 20:02:33,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:02:33,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:02:33,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:02:33,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:02:34,044 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:02:34,044 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-12 20:02:34,044 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 20:02:34,045 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 696 [2020-10-12 20:02:34,045 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:02:34,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 20:02:34,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 20:02:34,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-12 20:02:34,046 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:02:34,320 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2020-10-12 20:02:34,321 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:02:34,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:02:34,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:02:34,340 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:02:34,341 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:02:34,342 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:02:34,343 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-12 20:02:34,344 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:02:34,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 20:02:34,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:02:34,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 20:02:34,354 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 10 [2020-10-12 20:02:34,414 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 20:02:34,415 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1515834374] [2020-10-12 20:02:34,415 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 20:02:34,416 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-12 20:02:34,416 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857619824] [2020-10-12 20:02:34,419 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 20:02:34,419 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:02:34,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 20:02:34,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-12 20:02:34,420 INFO L87 Difference]: Start difference. First operand 264 states and 395 transitions. Second operand 7 states. [2020-10-12 20:02:35,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:02:35,726 INFO L93 Difference]: Finished difference Result 972 states and 1499 transitions. [2020-10-12 20:02:35,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-12 20:02:35,729 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 68 [2020-10-12 20:02:35,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:02:35,737 INFO L225 Difference]: With dead ends: 972 [2020-10-12 20:02:35,742 INFO L226 Difference]: Without dead ends: 770 [2020-10-12 20:02:35,745 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-12 20:02:35,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 770 states. [2020-10-12 20:02:35,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 770 to 764. [2020-10-12 20:02:35,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 764 states. [2020-10-12 20:02:35,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 764 states to 764 states and 1168 transitions. [2020-10-12 20:02:35,817 INFO L78 Accepts]: Start accepts. Automaton has 764 states and 1168 transitions. Word has length 68 [2020-10-12 20:02:35,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:02:35,818 INFO L479 AbstractCegarLoop]: Abstraction has 764 states and 1168 transitions. [2020-10-12 20:02:35,818 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 20:02:35,818 INFO L276 IsEmpty]: Start isEmpty. Operand 764 states and 1168 transitions. [2020-10-12 20:02:35,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-12 20:02:35,821 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:02:35,821 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 20:02:35,822 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-12 20:02:35,822 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:02:35,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:02:35,822 INFO L82 PathProgramCache]: Analyzing trace with hash 499104773, now seen corresponding path program 1 times [2020-10-12 20:02:35,822 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:02:35,823 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1923767766] [2020-10-12 20:02:35,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:02:35,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:02:35,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:02:35,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:02:36,393 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:02:36,393 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-12 20:02:36,393 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 20:02:36,393 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 536 [2020-10-12 20:02:36,393 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:02:36,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 20:02:36,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 20:02:36,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-12 20:02:36,394 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:02:36,568 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:02:36,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:02:36,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:02:36,631 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:02:36,631 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:02:36,631 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:02:36,632 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 52 [2020-10-12 20:02:36,632 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:02:36,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 20:02:36,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:02:36,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 20:02:36,633 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:02:36,648 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 20:02:36,649 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1923767766] [2020-10-12 20:02:36,650 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 20:02:36,650 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-12 20:02:36,650 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470786465] [2020-10-12 20:02:36,651 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 20:02:36,651 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:02:36,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 20:02:36,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-12 20:02:36,653 INFO L87 Difference]: Start difference. First operand 764 states and 1168 transitions. Second operand 6 states. [2020-10-12 20:02:36,823 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-12 20:02:37,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:02:37,687 INFO L93 Difference]: Finished difference Result 2036 states and 3158 transitions. [2020-10-12 20:02:37,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-12 20:02:37,688 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 69 [2020-10-12 20:02:37,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:02:37,697 INFO L225 Difference]: With dead ends: 2036 [2020-10-12 20:02:37,697 INFO L226 Difference]: Without dead ends: 1322 [2020-10-12 20:02:37,702 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-12 20:02:37,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1322 states. [2020-10-12 20:02:37,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1322 to 1320. [2020-10-12 20:02:37,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1320 states. [2020-10-12 20:02:37,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1320 states to 1320 states and 2033 transitions. [2020-10-12 20:02:37,790 INFO L78 Accepts]: Start accepts. Automaton has 1320 states and 2033 transitions. Word has length 69 [2020-10-12 20:02:37,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:02:37,791 INFO L479 AbstractCegarLoop]: Abstraction has 1320 states and 2033 transitions. [2020-10-12 20:02:37,791 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 20:02:37,791 INFO L276 IsEmpty]: Start isEmpty. Operand 1320 states and 2033 transitions. [2020-10-12 20:02:37,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-12 20:02:37,795 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:02:37,795 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 20:02:37,795 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-12 20:02:37,795 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:02:37,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:02:37,796 INFO L82 PathProgramCache]: Analyzing trace with hash -1672553433, now seen corresponding path program 1 times [2020-10-12 20:02:37,796 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:02:37,796 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1855435056] [2020-10-12 20:02:37,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:02:37,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:02:37,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:02:38,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:02:38,452 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:02:38,453 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-12 20:02:38,453 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 20:02:38,453 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 613 [2020-10-12 20:02:38,453 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:02:38,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 20:02:38,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 20:02:38,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-12 20:02:38,458 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-12 20:02:38,619 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2020-10-12 20:02:38,620 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:02:38,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:02:38,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:02:38,646 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:02:38,646 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:02:38,647 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:02:38,647 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-12 20:02:38,647 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:02:38,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 20:02:38,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:02:38,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 20:02:38,648 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:02:38,667 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 20:02:38,668 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1855435056] [2020-10-12 20:02:38,670 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 20:02:38,670 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-12 20:02:38,671 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136201177] [2020-10-12 20:02:38,672 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 20:02:38,672 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:02:38,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 20:02:38,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-12 20:02:38,673 INFO L87 Difference]: Start difference. First operand 1320 states and 2033 transitions. Second operand 6 states. [2020-10-12 20:02:38,816 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-12 20:02:39,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:02:39,747 INFO L93 Difference]: Finished difference Result 3532 states and 5499 transitions. [2020-10-12 20:02:39,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-12 20:02:39,748 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 69 [2020-10-12 20:02:39,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:02:39,761 INFO L225 Difference]: With dead ends: 3532 [2020-10-12 20:02:39,761 INFO L226 Difference]: Without dead ends: 2312 [2020-10-12 20:02:39,764 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-12 20:02:39,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2312 states. [2020-10-12 20:02:39,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2312 to 2310. [2020-10-12 20:02:39,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2310 states. [2020-10-12 20:02:39,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2310 states to 2310 states and 3571 transitions. [2020-10-12 20:02:39,919 INFO L78 Accepts]: Start accepts. Automaton has 2310 states and 3571 transitions. Word has length 69 [2020-10-12 20:02:39,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:02:39,919 INFO L479 AbstractCegarLoop]: Abstraction has 2310 states and 3571 transitions. [2020-10-12 20:02:39,919 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 20:02:39,920 INFO L276 IsEmpty]: Start isEmpty. Operand 2310 states and 3571 transitions. [2020-10-12 20:02:39,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-12 20:02:39,922 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:02:39,922 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 20:02:39,922 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-12 20:02:39,922 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:02:39,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:02:39,923 INFO L82 PathProgramCache]: Analyzing trace with hash 5084694, now seen corresponding path program 1 times [2020-10-12 20:02:39,923 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:02:39,923 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [799348329] [2020-10-12 20:02:39,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:02:39,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:02:39,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:02:40,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:02:40,387 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:02:40,387 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-12 20:02:40,388 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 20:02:40,388 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 439 [2020-10-12 20:02:40,388 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:02:40,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 20:02:40,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 20:02:40,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-12 20:02:40,389 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:02:40,560 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2020-10-12 20:02:40,561 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:02:40,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:02:40,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:02:40,591 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:02:40,592 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:02:40,592 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:02:40,592 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-12 20:02:40,592 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:02:40,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 20:02:40,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:02:40,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 20:02:40,593 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:02:40,613 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 20:02:40,613 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [799348329] [2020-10-12 20:02:40,614 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 20:02:40,614 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-12 20:02:40,614 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555589358] [2020-10-12 20:02:40,615 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 20:02:40,615 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:02:40,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 20:02:40,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-12 20:02:40,616 INFO L87 Difference]: Start difference. First operand 2310 states and 3571 transitions. Second operand 6 states. [2020-10-12 20:02:40,896 WARN L193 SmtUtils]: Spent 238.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2020-10-12 20:02:42,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:02:42,102 INFO L93 Difference]: Finished difference Result 6557 states and 10174 transitions. [2020-10-12 20:02:42,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-12 20:02:42,102 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 69 [2020-10-12 20:02:42,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:02:42,128 INFO L225 Difference]: With dead ends: 6557 [2020-10-12 20:02:42,128 INFO L226 Difference]: Without dead ends: 4320 [2020-10-12 20:02:42,134 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-12 20:02:42,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4320 states. [2020-10-12 20:02:42,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4320 to 4318. [2020-10-12 20:02:42,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4318 states. [2020-10-12 20:02:42,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4318 states to 4318 states and 6647 transitions. [2020-10-12 20:02:42,476 INFO L78 Accepts]: Start accepts. Automaton has 4318 states and 6647 transitions. Word has length 69 [2020-10-12 20:02:42,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:02:42,476 INFO L479 AbstractCegarLoop]: Abstraction has 4318 states and 6647 transitions. [2020-10-12 20:02:42,476 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 20:02:42,477 INFO L276 IsEmpty]: Start isEmpty. Operand 4318 states and 6647 transitions. [2020-10-12 20:02:42,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-12 20:02:42,479 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:02:42,479 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 20:02:42,479 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-12 20:02:42,479 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:02:42,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:02:42,480 INFO L82 PathProgramCache]: Analyzing trace with hash -1121481750, now seen corresponding path program 1 times [2020-10-12 20:02:42,480 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:02:42,480 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1029869294] [2020-10-12 20:02:42,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:02:42,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:02:42,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:02:42,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:02:42,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:02:44,366 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:02:44,367 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-12 20:02:44,367 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 20:02:44,367 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1860 [2020-10-12 20:02:44,367 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:02:44,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 20:02:44,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 20:02:44,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-12 20:02:44,368 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:02:44,736 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2020-10-12 20:02:44,737 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:02:44,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:02:44,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:02:44,772 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:02:44,772 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:02:44,773 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:02:44,773 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-12 20:02:44,773 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:02:44,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 20:02:44,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:02:44,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 20:02:44,775 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 20:02:44,810 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 20:02:44,811 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1029869294] [2020-10-12 20:02:44,813 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 20:02:44,813 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-12 20:02:44,814 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978826710] [2020-10-12 20:02:44,815 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-12 20:02:44,815 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:02:44,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-12 20:02:44,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-10-12 20:02:44,816 INFO L87 Difference]: Start difference. First operand 4318 states and 6647 transitions. Second operand 11 states. [2020-10-12 20:02:45,092 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 132 [2020-10-12 20:02:47,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:02:47,665 INFO L93 Difference]: Finished difference Result 12903 states and 19888 transitions. [2020-10-12 20:02:47,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-12 20:02:47,666 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 70 [2020-10-12 20:02:47,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:02:47,719 INFO L225 Difference]: With dead ends: 12903 [2020-10-12 20:02:47,719 INFO L226 Difference]: Without dead ends: 10297 [2020-10-12 20:02:47,728 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2020-10-12 20:02:47,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10297 states. [2020-10-12 20:02:48,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10297 to 4413. [2020-10-12 20:02:48,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4413 states. [2020-10-12 20:02:48,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4413 states to 4413 states and 6774 transitions. [2020-10-12 20:02:48,190 INFO L78 Accepts]: Start accepts. Automaton has 4413 states and 6774 transitions. Word has length 70 [2020-10-12 20:02:48,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:02:48,191 INFO L479 AbstractCegarLoop]: Abstraction has 4413 states and 6774 transitions. [2020-10-12 20:02:48,191 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-12 20:02:48,191 INFO L276 IsEmpty]: Start isEmpty. Operand 4413 states and 6774 transitions. [2020-10-12 20:02:48,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-12 20:02:48,199 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:02:48,199 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 20:02:48,200 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-12 20:02:48,200 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:02:48,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:02:48,200 INFO L82 PathProgramCache]: Analyzing trace with hash -868979926, now seen corresponding path program 1 times [2020-10-12 20:02:48,200 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:02:48,201 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1176268518] [2020-10-12 20:02:48,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:02:48,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:02:48,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:02:48,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:02:48,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:02:49,846 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:02:49,846 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-12 20:02:49,846 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 20:02:49,847 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1620 [2020-10-12 20:02:49,847 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:02:49,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 20:02:49,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 20:02:49,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-12 20:02:49,848 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 20:02:50,332 WARN L193 SmtUtils]: Spent 242.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2020-10-12 20:02:50,333 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:02:50,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:02:50,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:02:50,359 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:02:50,359 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:02:50,360 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:02:50,360 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-12 20:02:50,360 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:02:50,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 20:02:50,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:02:50,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 20:02:50,361 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:02:50,401 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 20:02:50,402 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1176268518] [2020-10-12 20:02:50,402 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 20:02:50,402 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-12 20:02:50,403 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619979627] [2020-10-12 20:02:50,403 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-12 20:02:50,404 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:02:50,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-12 20:02:50,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-10-12 20:02:50,405 INFO L87 Difference]: Start difference. First operand 4413 states and 6774 transitions. Second operand 11 states. [2020-10-12 20:02:50,698 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2020-10-12 20:02:54,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:02:54,395 INFO L93 Difference]: Finished difference Result 11598 states and 17697 transitions. [2020-10-12 20:02:54,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-12 20:02:54,396 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 70 [2020-10-12 20:02:54,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:02:54,438 INFO L225 Difference]: With dead ends: 11598 [2020-10-12 20:02:54,438 INFO L226 Difference]: Without dead ends: 10963 [2020-10-12 20:02:54,444 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=210, Invalid=602, Unknown=0, NotChecked=0, Total=812 [2020-10-12 20:02:54,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10963 states. [2020-10-12 20:02:54,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10963 to 4413. [2020-10-12 20:02:54,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4413 states. [2020-10-12 20:02:54,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4413 states to 4413 states and 6772 transitions. [2020-10-12 20:02:54,891 INFO L78 Accepts]: Start accepts. Automaton has 4413 states and 6772 transitions. Word has length 70 [2020-10-12 20:02:54,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:02:54,892 INFO L479 AbstractCegarLoop]: Abstraction has 4413 states and 6772 transitions. [2020-10-12 20:02:54,892 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-12 20:02:54,892 INFO L276 IsEmpty]: Start isEmpty. Operand 4413 states and 6772 transitions. [2020-10-12 20:02:54,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-12 20:02:54,894 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:02:54,895 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 20:02:54,895 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-12 20:02:54,895 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:02:54,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:02:54,895 INFO L82 PathProgramCache]: Analyzing trace with hash -1742349430, now seen corresponding path program 1 times [2020-10-12 20:02:54,896 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:02:54,896 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1463267651] [2020-10-12 20:02:54,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:02:54,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:02:54,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:02:55,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:02:55,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:02:56,489 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:02:56,490 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-12 20:02:56,490 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 20:02:56,490 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1568 [2020-10-12 20:02:56,490 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:02:56,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 20:02:56,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 20:02:56,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-12 20:02:56,491 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:02:56,831 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2020-10-12 20:02:56,832 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:02:56,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:02:56,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:02:56,858 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:02:56,858 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:02:56,858 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:02:56,858 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-12 20:02:56,859 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:02:56,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 20:02:56,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:02:56,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 20:02:56,859 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:02:56,893 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 20:02:56,894 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1463267651] [2020-10-12 20:02:56,898 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 20:02:56,898 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-12 20:02:56,899 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717893266] [2020-10-12 20:02:56,899 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-12 20:02:56,899 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:02:56,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-12 20:02:56,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2020-10-12 20:02:56,900 INFO L87 Difference]: Start difference. First operand 4413 states and 6772 transitions. Second operand 11 states. [2020-10-12 20:02:57,183 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 138 [2020-10-12 20:03:01,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:03:01,741 INFO L93 Difference]: Finished difference Result 19614 states and 30422 transitions. [2020-10-12 20:03:01,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-12 20:03:01,741 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 70 [2020-10-12 20:03:01,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:03:01,783 INFO L225 Difference]: With dead ends: 19614 [2020-10-12 20:03:01,783 INFO L226 Difference]: Without dead ends: 17508 [2020-10-12 20:03:01,792 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=175, Invalid=527, Unknown=0, NotChecked=0, Total=702 [2020-10-12 20:03:01,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17508 states. [2020-10-12 20:03:02,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17508 to 4566. [2020-10-12 20:03:02,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4566 states. [2020-10-12 20:03:02,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4566 states to 4566 states and 6974 transitions. [2020-10-12 20:03:02,291 INFO L78 Accepts]: Start accepts. Automaton has 4566 states and 6974 transitions. Word has length 70 [2020-10-12 20:03:02,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:03:02,291 INFO L479 AbstractCegarLoop]: Abstraction has 4566 states and 6974 transitions. [2020-10-12 20:03:02,291 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-12 20:03:02,291 INFO L276 IsEmpty]: Start isEmpty. Operand 4566 states and 6974 transitions. [2020-10-12 20:03:02,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-12 20:03:02,294 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:03:02,294 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 20:03:02,295 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-12 20:03:02,295 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:03:02,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:03:02,295 INFO L82 PathProgramCache]: Analyzing trace with hash -35248825, now seen corresponding path program 1 times [2020-10-12 20:03:02,295 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:03:02,296 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1335091509] [2020-10-12 20:03:02,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:03:02,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:03:02,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:03:02,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:03:02,715 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:03:02,716 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-12 20:03:02,716 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 20:03:02,716 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 398 [2020-10-12 20:03:02,716 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:03:02,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 20:03:02,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 20:03:02,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-12 20:03:02,717 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:03:02,866 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:03:02,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:03:02,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:03:02,887 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:03:02,888 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:03:02,888 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:03:02,888 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-12 20:03:02,888 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:03:02,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 20:03:02,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:03:02,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 20:03:02,890 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 20:03:02,903 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 20:03:02,904 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1335091509] [2020-10-12 20:03:02,904 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 20:03:02,904 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-12 20:03:02,904 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356389580] [2020-10-12 20:03:02,905 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 20:03:02,905 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:03:02,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 20:03:02,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-12 20:03:02,906 INFO L87 Difference]: Start difference. First operand 4566 states and 6974 transitions. Second operand 6 states. [2020-10-12 20:03:03,082 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2020-10-12 20:03:04,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:03:04,714 INFO L93 Difference]: Finished difference Result 13241 states and 20280 transitions. [2020-10-12 20:03:04,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-12 20:03:04,715 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 70 [2020-10-12 20:03:04,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:03:04,742 INFO L225 Difference]: With dead ends: 13241 [2020-10-12 20:03:04,742 INFO L226 Difference]: Without dead ends: 8727 [2020-10-12 20:03:04,754 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-12 20:03:04,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8727 states. [2020-10-12 20:03:05,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8727 to 8725. [2020-10-12 20:03:05,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8725 states. [2020-10-12 20:03:05,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8725 states to 8725 states and 13298 transitions. [2020-10-12 20:03:05,583 INFO L78 Accepts]: Start accepts. Automaton has 8725 states and 13298 transitions. Word has length 70 [2020-10-12 20:03:05,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:03:05,584 INFO L479 AbstractCegarLoop]: Abstraction has 8725 states and 13298 transitions. [2020-10-12 20:03:05,584 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 20:03:05,584 INFO L276 IsEmpty]: Start isEmpty. Operand 8725 states and 13298 transitions. [2020-10-12 20:03:05,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-12 20:03:05,589 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:03:05,589 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 20:03:05,589 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-12 20:03:05,589 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:03:05,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:03:05,590 INFO L82 PathProgramCache]: Analyzing trace with hash 1064422929, now seen corresponding path program 1 times [2020-10-12 20:03:05,590 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:03:05,590 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2065904035] [2020-10-12 20:03:05,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:03:05,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:03:05,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:03:05,744 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:03:05,745 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-12 20:03:05,745 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:03:05,745 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 130 [2020-10-12 20:03:05,745 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:03:05,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-12 20:03:05,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 73 [2020-10-12 20:03:05,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-12 20:03:05,746 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:03:05,937 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2020-10-12 20:03:05,937 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:03:05,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:03:05,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:03:05,952 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:03:05,952 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:03:05,952 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:03:05,953 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-12 20:03:05,953 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:03:05,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 20:03:05,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:03:05,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 20:03:05,954 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 20:03:05,972 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 20:03:05,973 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2065904035] [2020-10-12 20:03:05,973 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 20:03:05,974 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-12 20:03:05,974 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722240437] [2020-10-12 20:03:05,974 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-12 20:03:05,975 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:03:05,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-12 20:03:05,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-12 20:03:05,976 INFO L87 Difference]: Start difference. First operand 8725 states and 13298 transitions. Second operand 5 states. [2020-10-12 20:03:08,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:03:08,115 INFO L93 Difference]: Finished difference Result 16679 states and 25443 transitions. [2020-10-12 20:03:08,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-12 20:03:08,115 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 71 [2020-10-12 20:03:08,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:03:08,153 INFO L225 Difference]: With dead ends: 16679 [2020-10-12 20:03:08,154 INFO L226 Difference]: Without dead ends: 16677 [2020-10-12 20:03:08,160 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 [2020-10-12 20:03:08,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16677 states. [2020-10-12 20:03:09,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16677 to 8981. [2020-10-12 20:03:09,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8981 states. [2020-10-12 20:03:09,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8981 states to 8981 states and 13554 transitions. [2020-10-12 20:03:09,172 INFO L78 Accepts]: Start accepts. Automaton has 8981 states and 13554 transitions. Word has length 71 [2020-10-12 20:03:09,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:03:09,172 INFO L479 AbstractCegarLoop]: Abstraction has 8981 states and 13554 transitions. [2020-10-12 20:03:09,172 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-12 20:03:09,173 INFO L276 IsEmpty]: Start isEmpty. Operand 8981 states and 13554 transitions. [2020-10-12 20:03:09,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-12 20:03:09,176 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:03:09,176 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 20:03:09,176 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-12 20:03:09,176 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:03:09,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:03:09,177 INFO L82 PathProgramCache]: Analyzing trace with hash -1102286699, now seen corresponding path program 1 times [2020-10-12 20:03:09,177 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:03:09,177 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [323473893] [2020-10-12 20:03:09,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:03:09,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:03:09,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:03:09,320 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:03:09,320 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-12 20:03:09,320 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:03:09,320 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 120 [2020-10-12 20:03:09,321 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:03:09,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-12 20:03:09,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-12 20:03:09,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-12 20:03:09,321 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:03:09,487 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2020-10-12 20:03:09,487 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:03:09,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:03:09,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:03:09,509 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:03:09,509 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:03:09,509 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:03:09,509 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-12 20:03:09,510 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:03:09,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 20:03:09,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:03:09,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 20:03:09,510 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:03:09,530 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 20:03:09,531 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [323473893] [2020-10-12 20:03:09,531 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 20:03:09,531 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-12 20:03:09,531 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236103196] [2020-10-12 20:03:09,532 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-12 20:03:09,532 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:03:09,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-12 20:03:09,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-12 20:03:09,532 INFO L87 Difference]: Start difference. First operand 8981 states and 13554 transitions. Second operand 5 states. [2020-10-12 20:03:09,691 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2020-10-12 20:03:11,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:03:11,666 INFO L93 Difference]: Finished difference Result 23589 states and 35696 transitions. [2020-10-12 20:03:11,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-12 20:03:11,667 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 72 [2020-10-12 20:03:11,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:03:11,702 INFO L225 Difference]: With dead ends: 23589 [2020-10-12 20:03:11,702 INFO L226 Difference]: Without dead ends: 15635 [2020-10-12 20:03:11,720 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-12 20:03:11,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15635 states. [2020-10-12 20:03:13,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15635 to 15513. [2020-10-12 20:03:13,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15513 states. [2020-10-12 20:03:13,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15513 states to 15513 states and 23190 transitions. [2020-10-12 20:03:13,302 INFO L78 Accepts]: Start accepts. Automaton has 15513 states and 23190 transitions. Word has length 72 [2020-10-12 20:03:13,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:03:13,302 INFO L479 AbstractCegarLoop]: Abstraction has 15513 states and 23190 transitions. [2020-10-12 20:03:13,302 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-12 20:03:13,302 INFO L276 IsEmpty]: Start isEmpty. Operand 15513 states and 23190 transitions. [2020-10-12 20:03:13,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-12 20:03:13,306 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:03:13,306 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 20:03:13,306 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-12 20:03:13,306 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:03:13,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:03:13,307 INFO L82 PathProgramCache]: Analyzing trace with hash -1065091068, now seen corresponding path program 1 times [2020-10-12 20:03:13,307 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:03:13,307 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [113102270] [2020-10-12 20:03:13,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:03:13,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:03:13,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:03:13,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:03:13,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:03:14,923 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:03:14,923 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-12 20:03:14,924 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 20:03:14,924 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1593 [2020-10-12 20:03:14,924 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:03:14,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 20:03:14,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 20:03:14,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-12 20:03:14,925 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:03:15,242 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2020-10-12 20:03:15,243 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:03:15,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:03:15,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:03:15,255 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:03:15,255 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:03:15,256 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:03:15,256 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-12 20:03:15,256 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:03:15,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 20:03:15,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:03:15,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 20:03:15,257 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:03:15,279 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 20:03:15,279 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [113102270] [2020-10-12 20:03:15,280 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 20:03:15,280 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-12 20:03:15,280 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025246598] [2020-10-12 20:03:15,280 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-12 20:03:15,281 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:03:15,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-12 20:03:15,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-12 20:03:15,281 INFO L87 Difference]: Start difference. First operand 15513 states and 23190 transitions. Second operand 10 states. [2020-10-12 20:03:15,438 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2020-10-12 20:03:16,085 WARN L193 SmtUtils]: Spent 487.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2020-10-12 20:03:21,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:03:21,872 INFO L93 Difference]: Finished difference Result 65765 states and 98471 transitions. [2020-10-12 20:03:21,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-12 20:03:21,873 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 72 [2020-10-12 20:03:21,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:03:21,998 INFO L225 Difference]: With dead ends: 65765 [2020-10-12 20:03:21,998 INFO L226 Difference]: Without dead ends: 50527 [2020-10-12 20:03:22,036 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2020-10-12 20:03:22,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50527 states. [2020-10-12 20:03:24,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50527 to 22777. [2020-10-12 20:03:24,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22777 states. [2020-10-12 20:03:24,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22777 states to 22777 states and 33995 transitions. [2020-10-12 20:03:24,845 INFO L78 Accepts]: Start accepts. Automaton has 22777 states and 33995 transitions. Word has length 72 [2020-10-12 20:03:24,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:03:24,846 INFO L479 AbstractCegarLoop]: Abstraction has 22777 states and 33995 transitions. [2020-10-12 20:03:24,846 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-12 20:03:24,846 INFO L276 IsEmpty]: Start isEmpty. Operand 22777 states and 33995 transitions. [2020-10-12 20:03:24,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-12 20:03:24,851 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:03:24,851 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 20:03:24,851 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-12 20:03:24,852 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:03:24,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:03:24,852 INFO L82 PathProgramCache]: Analyzing trace with hash -701969532, now seen corresponding path program 1 times [2020-10-12 20:03:24,852 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:03:24,852 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1681710903] [2020-10-12 20:03:24,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:03:24,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:03:24,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:03:24,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:03:25,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:03:26,232 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:03:26,232 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-12 20:03:26,232 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 20:03:26,233 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1361 [2020-10-12 20:03:26,233 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:03:26,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 20:03:26,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 20:03:26,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-12 20:03:26,234 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 20:03:26,529 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2020-10-12 20:03:26,530 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:03:26,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:03:26,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:03:26,537 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:03:26,537 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:03:26,538 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:03:26,538 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 20:03:26,538 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:03:26,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 20:03:26,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:03:26,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 20:03:26,538 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:03:26,551 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 20:03:26,552 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1681710903] [2020-10-12 20:03:26,552 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 20:03:26,552 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-12 20:03:26,552 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025157886] [2020-10-12 20:03:26,553 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-12 20:03:26,553 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:03:26,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-12 20:03:26,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-12 20:03:26,553 INFO L87 Difference]: Start difference. First operand 22777 states and 33995 transitions. Second operand 10 states. [2020-10-12 20:03:26,702 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2020-10-12 20:03:42,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:03:42,444 INFO L93 Difference]: Finished difference Result 149734 states and 224661 transitions. [2020-10-12 20:03:42,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-12 20:03:42,444 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 72 [2020-10-12 20:03:42,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:03:42,658 INFO L225 Difference]: With dead ends: 149734 [2020-10-12 20:03:42,658 INFO L226 Difference]: Without dead ends: 127396 [2020-10-12 20:03:42,717 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=92, Invalid=288, Unknown=0, NotChecked=0, Total=380 [2020-10-12 20:03:42,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127396 states. [2020-10-12 20:03:49,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127396 to 43417. [2020-10-12 20:03:49,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43417 states. [2020-10-12 20:03:49,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43417 states to 43417 states and 65086 transitions. [2020-10-12 20:03:49,332 INFO L78 Accepts]: Start accepts. Automaton has 43417 states and 65086 transitions. Word has length 72 [2020-10-12 20:03:49,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:03:49,332 INFO L479 AbstractCegarLoop]: Abstraction has 43417 states and 65086 transitions. [2020-10-12 20:03:49,333 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-12 20:03:49,333 INFO L276 IsEmpty]: Start isEmpty. Operand 43417 states and 65086 transitions. [2020-10-12 20:03:49,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-12 20:03:49,338 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:03:49,338 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 20:03:49,338 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-12 20:03:49,338 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:03:49,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:03:49,339 INFO L82 PathProgramCache]: Analyzing trace with hash -1620115166, now seen corresponding path program 1 times [2020-10-12 20:03:49,339 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:03:49,339 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2086140573] [2020-10-12 20:03:49,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:03:49,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:03:49,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:03:49,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:03:49,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:03:51,087 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:03:51,088 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-12 20:03:51,088 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 20:03:51,088 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1724 [2020-10-12 20:03:51,088 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:03:51,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 20:03:51,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 20:03:51,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-12 20:03:51,088 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:03:51,486 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2020-10-12 20:03:51,487 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:03:51,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:03:51,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:03:51,501 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:03:51,502 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:03:51,502 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:03:51,502 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-12 20:03:51,503 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:03:51,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 20:03:51,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:03:51,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 20:03:51,504 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 20:03:51,542 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 20:03:51,542 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2086140573] [2020-10-12 20:03:51,542 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 20:03:51,543 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-12 20:03:51,543 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838820501] [2020-10-12 20:03:51,544 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-12 20:03:51,544 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:03:51,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-12 20:03:51,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-12 20:03:51,545 INFO L87 Difference]: Start difference. First operand 43417 states and 65086 transitions. Second operand 10 states. [2020-10-12 20:03:51,764 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2020-10-12 20:04:06,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:04:06,110 INFO L93 Difference]: Finished difference Result 140375 states and 210761 transitions. [2020-10-12 20:04:06,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-12 20:04:06,111 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 72 [2020-10-12 20:04:06,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:04:06,244 INFO L225 Difference]: With dead ends: 140375 [2020-10-12 20:04:06,244 INFO L226 Difference]: Without dead ends: 97486 [2020-10-12 20:04:06,286 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2020-10-12 20:04:06,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97486 states. [2020-10-12 20:04:15,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97486 to 63666. [2020-10-12 20:04:15,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63666 states. [2020-10-12 20:04:15,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63666 states to 63666 states and 95413 transitions. [2020-10-12 20:04:15,792 INFO L78 Accepts]: Start accepts. Automaton has 63666 states and 95413 transitions. Word has length 72 [2020-10-12 20:04:15,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:04:15,793 INFO L479 AbstractCegarLoop]: Abstraction has 63666 states and 95413 transitions. [2020-10-12 20:04:15,793 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-12 20:04:15,793 INFO L276 IsEmpty]: Start isEmpty. Operand 63666 states and 95413 transitions. [2020-10-12 20:04:15,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-12 20:04:15,797 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:04:15,797 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 20:04:15,798 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-12 20:04:15,798 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:04:15,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:04:15,798 INFO L82 PathProgramCache]: Analyzing trace with hash 1039266945, now seen corresponding path program 1 times [2020-10-12 20:04:15,799 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:04:15,799 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1392507960] [2020-10-12 20:04:15,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:04:15,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:04:15,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:04:15,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:04:15,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:04:16,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:04:17,721 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:04:17,722 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-12 20:04:17,722 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 20:04:17,722 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1903 [2020-10-12 20:04:17,722 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:04:17,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 20:04:17,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 20:04:17,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-12 20:04:17,723 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:04:17,977 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:04:17,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:04:17,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:04:17,996 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:04:17,996 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:04:17,996 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:04:17,996 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-12 20:04:17,997 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:04:17,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 20:04:17,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:04:17,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 20:04:17,998 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:04:18,029 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 20:04:18,029 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1392507960] [2020-10-12 20:04:18,030 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 20:04:18,030 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-12 20:04:18,030 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339625551] [2020-10-12 20:04:18,030 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 20:04:18,030 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:04:18,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 20:04:18,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-12 20:04:18,031 INFO L87 Difference]: Start difference. First operand 63666 states and 95413 transitions. Second operand 8 states. [2020-10-12 20:04:18,175 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2020-10-12 20:04:32,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:04:32,469 INFO L93 Difference]: Finished difference Result 144325 states and 215709 transitions. [2020-10-12 20:04:32,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-12 20:04:32,470 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 73 [2020-10-12 20:04:32,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:04:32,580 INFO L225 Difference]: With dead ends: 144325 [2020-10-12 20:04:32,580 INFO L226 Difference]: Without dead ends: 81183 [2020-10-12 20:04:32,635 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2020-10-12 20:04:32,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81183 states. [2020-10-12 20:04:39,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81183 to 49314. [2020-10-12 20:04:39,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49314 states. [2020-10-12 20:04:39,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49314 states to 49314 states and 73934 transitions. [2020-10-12 20:04:39,460 INFO L78 Accepts]: Start accepts. Automaton has 49314 states and 73934 transitions. Word has length 73 [2020-10-12 20:04:39,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:04:39,460 INFO L479 AbstractCegarLoop]: Abstraction has 49314 states and 73934 transitions. [2020-10-12 20:04:39,460 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 20:04:39,461 INFO L276 IsEmpty]: Start isEmpty. Operand 49314 states and 73934 transitions. [2020-10-12 20:04:39,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-12 20:04:39,464 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:04:39,464 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 20:04:39,464 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-12 20:04:39,464 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:04:39,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:04:39,465 INFO L82 PathProgramCache]: Analyzing trace with hash -1551340055, now seen corresponding path program 1 times [2020-10-12 20:04:39,465 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:04:39,465 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [660449120] [2020-10-12 20:04:39,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:04:39,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:04:39,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:04:39,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:04:39,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:04:39,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:04:40,973 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:04:40,973 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-12 20:04:40,973 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 20:04:40,974 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1488 [2020-10-12 20:04:40,974 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:04:40,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 20:04:40,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 20:04:40,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-12 20:04:40,974 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:04:41,253 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2020-10-12 20:04:41,254 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:04:41,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:04:41,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:04:41,278 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:04:41,278 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:04:41,278 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:04:41,279 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-12 20:04:41,279 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:04:41,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 20:04:41,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:04:41,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 20:04:41,280 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:04:41,306 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 20:04:41,307 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [660449120] [2020-10-12 20:04:41,310 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 20:04:41,310 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-12 20:04:41,311 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277350515] [2020-10-12 20:04:41,311 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 20:04:41,311 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:04:41,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 20:04:41,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-12 20:04:41,312 INFO L87 Difference]: Start difference. First operand 49314 states and 73934 transitions. Second operand 8 states. [2020-10-12 20:04:41,453 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2020-10-12 20:05:07,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:05:07,526 INFO L93 Difference]: Finished difference Result 200483 states and 298912 transitions. [2020-10-12 20:05:07,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-12 20:05:07,526 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 73 [2020-10-12 20:05:07,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:05:07,834 INFO L225 Difference]: With dead ends: 200483 [2020-10-12 20:05:07,835 INFO L226 Difference]: Without dead ends: 151997 [2020-10-12 20:05:07,887 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2020-10-12 20:05:07,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151997 states. [2020-10-12 20:05:15,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151997 to 48749. [2020-10-12 20:05:15,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48749 states. [2020-10-12 20:05:15,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48749 states to 48749 states and 72798 transitions. [2020-10-12 20:05:15,538 INFO L78 Accepts]: Start accepts. Automaton has 48749 states and 72798 transitions. Word has length 73 [2020-10-12 20:05:15,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:05:15,539 INFO L479 AbstractCegarLoop]: Abstraction has 48749 states and 72798 transitions. [2020-10-12 20:05:15,539 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 20:05:15,539 INFO L276 IsEmpty]: Start isEmpty. Operand 48749 states and 72798 transitions. [2020-10-12 20:05:15,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-12 20:05:15,541 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:05:15,541 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 20:05:15,542 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-12 20:05:15,542 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:05:15,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:05:15,542 INFO L82 PathProgramCache]: Analyzing trace with hash -520885437, now seen corresponding path program 1 times [2020-10-12 20:05:15,542 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:05:15,543 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1017334007] [2020-10-12 20:05:15,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:05:15,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:05:15,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:05:15,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:05:15,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:05:15,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:05:16,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:05:16,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:05:17,833 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:05:17,834 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-12 20:05:17,834 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 20:05:17,834 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2273 [2020-10-12 20:05:17,834 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:05:17,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-12 20:05:17,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 20:05:17,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-12 20:05:17,835 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:05:18,122 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2020-10-12 20:05:18,123 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:05:18,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:05:18,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:05:18,140 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:05:18,140 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:05:18,140 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:05:18,141 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-12 20:05:18,141 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:05:18,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 20:05:18,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:05:18,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 20:05:18,141 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:05:18,170 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 20:05:18,170 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1017334007] [2020-10-12 20:05:18,171 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 20:05:18,171 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-10-12 20:05:18,171 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029378552] [2020-10-12 20:05:18,171 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-12 20:05:18,172 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:05:18,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-12 20:05:18,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2020-10-12 20:05:18,172 INFO L87 Difference]: Start difference. First operand 48749 states and 72798 transitions. Second operand 12 states. [2020-10-12 20:05:18,504 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 126