/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.4 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops/linear_sea.ch.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-14 05:36:22,334 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-14 05:36:22,336 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-14 05:36:22,381 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-14 05:36:22,382 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-14 05:36:22,393 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-14 05:36:22,394 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-14 05:36:22,399 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-14 05:36:22,401 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-14 05:36:22,404 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-14 05:36:22,408 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-14 05:36:22,409 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-14 05:36:22,409 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-14 05:36:22,410 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-14 05:36:22,411 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-14 05:36:22,412 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-14 05:36:22,413 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-14 05:36:22,413 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-14 05:36:22,415 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-14 05:36:22,417 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-14 05:36:22,418 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-14 05:36:22,419 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-14 05:36:22,420 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-14 05:36:22,421 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-14 05:36:22,424 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-14 05:36:22,424 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-14 05:36:22,424 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-14 05:36:22,425 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-14 05:36:22,426 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-14 05:36:22,426 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-14 05:36:22,427 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-14 05:36:22,427 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-14 05:36:22,428 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-14 05:36:22,429 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-14 05:36:22,430 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-14 05:36:22,430 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-14 05:36:22,431 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-14 05:36:22,431 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-14 05:36:22,431 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-14 05:36:22,432 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-14 05:36:22,433 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-14 05:36:22,433 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-14 05:36:22,456 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-14 05:36:22,456 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-14 05:36:22,457 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-14 05:36:22,458 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-14 05:36:22,458 INFO L138 SettingsManager]: * Use SBE=true [2020-10-14 05:36:22,458 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-14 05:36:22,458 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-14 05:36:22,459 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-14 05:36:22,459 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-14 05:36:22,459 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-14 05:36:22,459 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-14 05:36:22,459 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-14 05:36:22,460 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-14 05:36:22,460 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-14 05:36:22,460 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-14 05:36:22,460 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-14 05:36:22,460 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-14 05:36:22,461 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-14 05:36:22,461 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-14 05:36:22,461 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-14 05:36:22,461 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-14 05:36:22,461 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 05:36:22,462 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-14 05:36:22,462 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-14 05:36:22,462 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-14 05:36:22,462 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-14 05:36:22,462 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-14 05:36:22,462 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-14 05:36:22,463 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-14 05:36:22,463 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; [2020-10-14 05:36:22,780 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-14 05:36:22,793 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-14 05:36:22,797 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-14 05:36:22,799 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-14 05:36:22,799 INFO L275 PluginConnector]: CDTParser initialized [2020-10-14 05:36:22,800 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/linear_sea.ch.c [2020-10-14 05:36:22,854 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1533bc6e1/7a400f424b64436db786b478569834e5/FLAGbf35306c8 [2020-10-14 05:36:23,267 INFO L306 CDTParser]: Found 1 translation units. [2020-10-14 05:36:23,267 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/linear_sea.ch.c [2020-10-14 05:36:23,275 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1533bc6e1/7a400f424b64436db786b478569834e5/FLAGbf35306c8 [2020-10-14 05:36:23,713 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1533bc6e1/7a400f424b64436db786b478569834e5 [2020-10-14 05:36:23,722 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-14 05:36:23,724 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-14 05:36:23,725 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-14 05:36:23,725 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-14 05:36:23,729 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-14 05:36:23,730 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 05:36:23" (1/1) ... [2020-10-14 05:36:23,733 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@590f663f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:36:23, skipping insertion in model container [2020-10-14 05:36:23,734 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 05:36:23" (1/1) ... [2020-10-14 05:36:23,742 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-14 05:36:23,761 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-14 05:36:23,941 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 05:36:23,954 INFO L203 MainTranslator]: Completed pre-run [2020-10-14 05:36:23,974 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 05:36:23,991 INFO L208 MainTranslator]: Completed translation [2020-10-14 05:36:23,992 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:36:23 WrapperNode [2020-10-14 05:36:23,992 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-14 05:36:23,993 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-14 05:36:23,993 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-14 05:36:23,993 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-14 05:36:24,120 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:36:23" (1/1) ... [2020-10-14 05:36:24,122 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:36:23" (1/1) ... [2020-10-14 05:36:24,133 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:36:23" (1/1) ... [2020-10-14 05:36:24,134 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:36:23" (1/1) ... [2020-10-14 05:36:24,163 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:36:23" (1/1) ... [2020-10-14 05:36:24,172 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:36:23" (1/1) ... [2020-10-14 05:36:24,175 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:36:23" (1/1) ... [2020-10-14 05:36:24,184 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-14 05:36:24,184 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-14 05:36:24,184 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-14 05:36:24,185 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-14 05:36:24,186 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:36:23" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 05:36:24,265 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-14 05:36:24,265 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-14 05:36:24,266 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-14 05:36:24,266 INFO L138 BoogieDeclarations]: Found implementation of procedure linear_search [2020-10-14 05:36:24,266 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-14 05:36:24,266 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-14 05:36:24,266 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-14 05:36:24,266 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-14 05:36:24,267 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-10-14 05:36:24,267 INFO L130 BoogieDeclarations]: Found specification of procedure linear_search [2020-10-14 05:36:24,267 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-14 05:36:24,267 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-14 05:36:24,267 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-14 05:36:24,267 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-14 05:36:24,268 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-14 05:36:24,268 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-14 05:36:24,268 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-14 05:36:24,599 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-14 05:36:24,600 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-14 05:36:24,604 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 05:36:24 BoogieIcfgContainer [2020-10-14 05:36:24,605 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-14 05:36:24,612 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-14 05:36:24,612 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-14 05:36:24,616 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-14 05:36:24,616 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 05:36:23" (1/3) ... [2020-10-14 05:36:24,617 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30555d88 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 05:36:24, skipping insertion in model container [2020-10-14 05:36:24,617 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:36:23" (2/3) ... [2020-10-14 05:36:24,618 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30555d88 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 05:36:24, skipping insertion in model container [2020-10-14 05:36:24,618 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 05:36:24" (3/3) ... [2020-10-14 05:36:24,620 INFO L109 eAbstractionObserver]: Analyzing ICFG linear_sea.ch.c [2020-10-14 05:36:24,631 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-14 05:36:24,638 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-14 05:36:24,653 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-14 05:36:24,680 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-14 05:36:24,681 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-14 05:36:24,681 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-14 05:36:24,681 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-14 05:36:24,681 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-14 05:36:24,681 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-14 05:36:24,681 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-14 05:36:24,682 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-14 05:36:24,704 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states. [2020-10-14 05:36:24,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-14 05:36:24,713 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:36:24,714 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:36:24,715 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:36:24,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:36:24,722 INFO L82 PathProgramCache]: Analyzing trace with hash -1860043698, now seen corresponding path program 1 times [2020-10-14 05:36:24,733 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:36:24,735 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [47907747] [2020-10-14 05:36:24,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:36:24,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:36:24,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:36:25,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:36:25,572 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:36:25,572 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-14 05:36:25,572 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:36:25,573 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 658 [2020-10-14 05:36:25,576 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:36:25,576 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:36:25,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:36:25,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-14 05:36:25,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:36:25,578 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-14 05:36:25,642 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:36:25,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:36:25,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:36:25,653 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:36:25,654 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:36:25,655 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:36:25,655 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-14 05:36:25,655 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:36:25,655 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:36:25,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:36:25,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:36:25,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:36:25,656 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:36:25,661 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 05:36:25,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:36:25,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:36:25,672 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:36:25,673 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-14 05:36:25,673 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:36:25,673 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-14 05:36:25,674 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:36:25,674 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:36:25,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:36:25,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-10-14 05:36:25,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:36:25,675 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:36:25,681 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:36:25,682 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [47907747] [2020-10-14 05:36:25,684 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 05:36:25,685 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-14 05:36:25,686 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639164382] [2020-10-14 05:36:25,691 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-14 05:36:25,691 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:36:25,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-14 05:36:25,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-14 05:36:25,709 INFO L87 Difference]: Start difference. First operand 28 states. Second operand 3 states. [2020-10-14 05:36:25,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:36:25,799 INFO L93 Difference]: Finished difference Result 44 states and 51 transitions. [2020-10-14 05:36:25,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-14 05:36:25,801 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-10-14 05:36:25,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:36:25,811 INFO L225 Difference]: With dead ends: 44 [2020-10-14 05:36:25,811 INFO L226 Difference]: Without dead ends: 21 [2020-10-14 05:36:25,815 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-14 05:36:25,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-10-14 05:36:25,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-10-14 05:36:25,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-10-14 05:36:25,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2020-10-14 05:36:25,863 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 18 [2020-10-14 05:36:25,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:36:25,864 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2020-10-14 05:36:25,864 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-14 05:36:25,865 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2020-10-14 05:36:25,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-14 05:36:25,866 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:36:25,866 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] [2020-10-14 05:36:25,866 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-14 05:36:25,867 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:36:25,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:36:25,867 INFO L82 PathProgramCache]: Analyzing trace with hash 916881159, now seen corresponding path program 1 times [2020-10-14 05:36:25,868 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:36:25,868 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [178487869] [2020-10-14 05:36:25,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:36:25,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:36:25,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:36:26,298 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:36:26,298 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-14 05:36:26,299 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:36:26,299 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 385 [2020-10-14 05:36:26,299 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:36:26,300 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:36:26,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-14 05:36:26,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-14 05:36:26,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-14 05:36:26,301 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:36:26,375 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:36:26,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:36:26,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:36:26,383 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:36:26,389 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:36:26,389 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:36:26,389 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-14 05:36:26,389 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:36:26,390 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:36:26,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:36:26,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:36:26,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:36:26,390 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:36:26,395 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 05:36:26,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:36:26,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:36:26,455 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:36:26,456 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-14 05:36:26,456 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:36:26,456 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 52 [2020-10-14 05:36:26,456 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:36:26,457 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:36:26,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 05:36:26,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:36:26,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-14 05:36:26,459 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-14 05:36:26,485 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:36:26,485 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [178487869] [2020-10-14 05:36:26,485 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 05:36:26,486 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-14 05:36:26,486 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124208837] [2020-10-14 05:36:26,490 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-14 05:36:26,490 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:36:26,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-14 05:36:26,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-14 05:36:26,491 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand 7 states. [2020-10-14 05:36:26,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:36:26,655 INFO L93 Difference]: Finished difference Result 29 states and 30 transitions. [2020-10-14 05:36:26,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-14 05:36:26,656 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 20 [2020-10-14 05:36:26,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:36:26,657 INFO L225 Difference]: With dead ends: 29 [2020-10-14 05:36:26,657 INFO L226 Difference]: Without dead ends: 21 [2020-10-14 05:36:26,659 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-10-14 05:36:26,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-10-14 05:36:26,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-10-14 05:36:26,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-10-14 05:36:26,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-10-14 05:36:26,665 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 20 [2020-10-14 05:36:26,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:36:26,666 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-10-14 05:36:26,666 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-14 05:36:26,666 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-10-14 05:36:26,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-14 05:36:26,667 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:36:26,667 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] [2020-10-14 05:36:26,667 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-14 05:36:26,667 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:36:26,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:36:26,668 INFO L82 PathProgramCache]: Analyzing trace with hash -1635275802, now seen corresponding path program 1 times [2020-10-14 05:36:26,668 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:36:26,669 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [640615370] [2020-10-14 05:36:26,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:36:26,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:36:26,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:36:26,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:36:26,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:36:27,033 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:36:27,033 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-14 05:36:27,034 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:36:27,034 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 345 [2020-10-14 05:36:27,034 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:36:27,034 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:36:27,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 05:36:27,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:36:27,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-14 05:36:27,035 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:36:27,090 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:36:27,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:36:27,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:36:27,096 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:36:27,097 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:36:27,097 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:36:27,097 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-14 05:36:27,098 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:36:27,098 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:36:27,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:36:27,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:36:27,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:36:27,099 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:36:27,105 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 05:36:27,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:36:27,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:36:27,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:36:27,276 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:36:27,276 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-14 05:36:27,277 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:36:27,277 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 158 [2020-10-14 05:36:27,277 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:36:27,277 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:36:27,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 05:36:27,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 05:36:27,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-14 05:36:27,278 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:36:27,333 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:36:27,333 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [640615370] [2020-10-14 05:36:27,334 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 05:36:27,334 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-14 05:36:27,334 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920114776] [2020-10-14 05:36:27,335 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 05:36:27,335 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:36:27,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 05:36:27,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-14 05:36:27,336 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 6 states. [2020-10-14 05:36:27,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:36:27,496 INFO L93 Difference]: Finished difference Result 33 states and 35 transitions. [2020-10-14 05:36:27,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-14 05:36:27,497 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2020-10-14 05:36:27,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:36:27,498 INFO L225 Difference]: With dead ends: 33 [2020-10-14 05:36:27,499 INFO L226 Difference]: Without dead ends: 24 [2020-10-14 05:36:27,499 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-10-14 05:36:27,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-10-14 05:36:27,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-10-14 05:36:27,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-14 05:36:27,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2020-10-14 05:36:27,506 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 20 [2020-10-14 05:36:27,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:36:27,507 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2020-10-14 05:36:27,507 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 05:36:27,507 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2020-10-14 05:36:27,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-14 05:36:27,508 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:36:27,508 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:36:27,509 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-14 05:36:27,509 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:36:27,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:36:27,509 INFO L82 PathProgramCache]: Analyzing trace with hash 636491705, now seen corresponding path program 1 times [2020-10-14 05:36:27,510 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:36:27,510 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [874577681] [2020-10-14 05:36:27,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:36:27,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:36:27,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:36:27,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:36:28,034 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:36:28,035 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-14 05:36:28,035 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:36:28,035 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 504 [2020-10-14 05:36:28,036 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:36:28,036 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:36:28,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 05:36:28,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 05:36:28,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-14 05:36:28,038 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-14 05:36:28,110 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:36:28,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:36:28,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:36:28,118 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:36:28,118 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:36:28,119 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:36:28,119 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-14 05:36:28,119 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:36:28,120 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:36:28,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:36:28,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:36:28,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:36:28,120 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:36:28,123 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 05:36:28,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:36:28,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:36:28,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:36:28,423 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:36:28,424 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-10-14 05:36:28,424 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:36:28,424 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 281 [2020-10-14 05:36:28,424 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:36:28,425 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:36:28,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-14 05:36:28,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 05:36:28,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-14 05:36:28,425 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:36:28,602 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 05:36:28,602 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [874577681] [2020-10-14 05:36:28,602 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:36:28,603 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-14 05:36:28,603 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202244913] [2020-10-14 05:36:28,603 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-14 05:36:28,604 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:36:28,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-14 05:36:28,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-14 05:36:28,605 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 8 states. [2020-10-14 05:36:28,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:36:28,944 INFO L93 Difference]: Finished difference Result 35 states and 37 transitions. [2020-10-14 05:36:28,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-14 05:36:28,945 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 23 [2020-10-14 05:36:28,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:36:28,948 INFO L225 Difference]: With dead ends: 35 [2020-10-14 05:36:28,948 INFO L226 Difference]: Without dead ends: 26 [2020-10-14 05:36:28,949 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-10-14 05:36:28,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-10-14 05:36:28,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2020-10-14 05:36:28,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-14 05:36:28,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2020-10-14 05:36:28,956 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 23 [2020-10-14 05:36:28,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:36:28,957 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2020-10-14 05:36:28,957 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-14 05:36:28,957 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2020-10-14 05:36:28,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-14 05:36:28,958 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:36:28,958 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:36:28,958 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-14 05:36:28,959 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:36:28,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:36:28,959 INFO L82 PathProgramCache]: Analyzing trace with hash 243464695, now seen corresponding path program 1 times [2020-10-14 05:36:28,959 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:36:28,960 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1079105332] [2020-10-14 05:36:28,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:36:28,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:36:28,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:36:29,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:36:29,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:36:29,718 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:36:29,719 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-14 05:36:29,719 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:36:29,719 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 740 [2020-10-14 05:36:29,719 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:36:29,720 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:36:29,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 05:36:29,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 05:36:29,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-14 05:36:29,721 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:36:29,777 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:36:29,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:36:29,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:36:29,782 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:36:29,782 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:36:29,782 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:36:29,783 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 05:36:29,783 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:36:29,783 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:36:29,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:36:29,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:36:29,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:36:29,784 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:36:29,786 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 05:36:29,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:36:29,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:36:29,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:36:29,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:36:30,081 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:36:30,082 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-10-14 05:36:30,082 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:36:30,082 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 288 [2020-10-14 05:36:30,083 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:36:30,083 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:36:30,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 05:36:30,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 05:36:30,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-14 05:36:30,084 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:36:30,155 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:36:30,155 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1079105332] [2020-10-14 05:36:30,156 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:36:30,156 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-14 05:36:30,156 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661640156] [2020-10-14 05:36:30,157 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-14 05:36:30,157 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:36:30,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-14 05:36:30,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-14 05:36:30,158 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 7 states. [2020-10-14 05:36:30,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:36:30,368 INFO L93 Difference]: Finished difference Result 38 states and 41 transitions. [2020-10-14 05:36:30,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-14 05:36:30,369 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 23 [2020-10-14 05:36:30,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:36:30,370 INFO L225 Difference]: With dead ends: 38 [2020-10-14 05:36:30,370 INFO L226 Difference]: Without dead ends: 29 [2020-10-14 05:36:30,371 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-10-14 05:36:30,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-14 05:36:30,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2020-10-14 05:36:30,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-14 05:36:30,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2020-10-14 05:36:30,377 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 23 [2020-10-14 05:36:30,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:36:30,378 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2020-10-14 05:36:30,378 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-14 05:36:30,378 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2020-10-14 05:36:30,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-14 05:36:30,379 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:36:30,379 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:36:30,379 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-14 05:36:30,380 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:36:30,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:36:30,380 INFO L82 PathProgramCache]: Analyzing trace with hash -1625384636, now seen corresponding path program 2 times [2020-10-14 05:36:30,380 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:36:30,381 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [782742895] [2020-10-14 05:36:30,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:36:30,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:36:30,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:36:30,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:36:30,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:36:32,160 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:36:32,160 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-14 05:36:32,160 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:36:32,160 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1754 [2020-10-14 05:36:32,161 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:36:32,161 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:36:32,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-14 05:36:32,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 05:36:32,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-14 05:36:32,162 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:36:32,507 WARN L193 SmtUtils]: Spent 288.00 ms on a formula simplification. DAG size of input: 162 DAG size of output: 25 [2020-10-14 05:36:32,522 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:36:32,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:36:32,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:36:32,528 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:36:32,528 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:36:32,528 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:36:32,529 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 05:36:32,529 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:36:32,529 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:36:32,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:36:32,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:36:32,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:36:32,530 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:36:32,532 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 05:36:32,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:36:32,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:36:32,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:36:32,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:36:33,252 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:36:33,252 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-14 05:36:33,252 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:36:33,252 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 706 [2020-10-14 05:36:33,253 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:36:33,253 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:36:33,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-14 05:36:33,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 05:36:33,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-14 05:36:33,254 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:36:33,681 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:36:33,682 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [782742895] [2020-10-14 05:36:33,682 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:36:33,682 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-14 05:36:33,683 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659764812] [2020-10-14 05:36:33,683 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-14 05:36:33,684 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:36:33,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-14 05:36:33,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-10-14 05:36:33,684 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand 9 states. [2020-10-14 05:36:34,197 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-10-14 05:36:34,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:36:34,281 INFO L93 Difference]: Finished difference Result 41 states and 45 transitions. [2020-10-14 05:36:34,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-14 05:36:34,282 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 26 [2020-10-14 05:36:34,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:36:34,284 INFO L225 Difference]: With dead ends: 41 [2020-10-14 05:36:34,284 INFO L226 Difference]: Without dead ends: 32 [2020-10-14 05:36:34,287 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2020-10-14 05:36:34,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-10-14 05:36:34,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2020-10-14 05:36:34,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-14 05:36:34,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2020-10-14 05:36:34,300 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 26 [2020-10-14 05:36:34,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:36:34,301 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2020-10-14 05:36:34,301 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-14 05:36:34,302 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2020-10-14 05:36:34,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-14 05:36:34,303 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:36:34,304 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:36:34,304 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-14 05:36:34,305 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:36:34,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:36:34,305 INFO L82 PathProgramCache]: Analyzing trace with hash -854746409, now seen corresponding path program 3 times [2020-10-14 05:36:34,306 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:36:34,306 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [528650718] [2020-10-14 05:36:34,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:36:34,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:36:34,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:36:34,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:36:34,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:36:35,946 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:36:35,947 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-14 05:36:35,947 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:36:35,947 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1586 [2020-10-14 05:36:35,947 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:36:35,947 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:36:35,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 05:36:35,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 05:36:35,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-14 05:36:35,948 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:36:36,292 WARN L193 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 214 DAG size of output: 24 [2020-10-14 05:36:36,308 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:36:36,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:36:36,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:36:36,312 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:36:36,312 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:36:36,312 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:36:36,313 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 05:36:36,313 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:36:36,313 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:36:36,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:36:36,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:36:36,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:36:36,314 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:36:36,316 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 05:36:36,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:36:36,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:36:36,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:36:36,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:36:37,319 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:36:37,319 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-14 05:36:37,319 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:36:37,320 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 985 [2020-10-14 05:36:37,320 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:36:37,320 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:36:37,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-14 05:36:37,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 05:36:37,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-14 05:36:37,321 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:36:37,884 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:36:37,885 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [528650718] [2020-10-14 05:36:37,885 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:36:37,886 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-14 05:36:37,886 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248779582] [2020-10-14 05:36:37,887 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-14 05:36:37,887 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:36:37,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-14 05:36:37,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-10-14 05:36:37,888 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand 11 states. [2020-10-14 05:36:38,874 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 61 [2020-10-14 05:36:39,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:36:39,094 INFO L93 Difference]: Finished difference Result 55 states and 63 transitions. [2020-10-14 05:36:39,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-14 05:36:39,095 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 29 [2020-10-14 05:36:39,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:36:39,096 INFO L225 Difference]: With dead ends: 55 [2020-10-14 05:36:39,096 INFO L226 Difference]: Without dead ends: 34 [2020-10-14 05:36:39,097 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=87, Invalid=333, Unknown=0, NotChecked=0, Total=420 [2020-10-14 05:36:39,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-14 05:36:39,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2020-10-14 05:36:39,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-14 05:36:39,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2020-10-14 05:36:39,110 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 29 [2020-10-14 05:36:39,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:36:39,110 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2020-10-14 05:36:39,111 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-14 05:36:39,111 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2020-10-14 05:36:39,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-14 05:36:39,113 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:36:39,113 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:36:39,114 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-14 05:36:39,114 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:36:39,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:36:39,115 INFO L82 PathProgramCache]: Analyzing trace with hash 628477028, now seen corresponding path program 4 times [2020-10-14 05:36:39,115 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:36:39,115 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [523222968] [2020-10-14 05:36:39,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:36:39,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:36:39,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:36:39,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:36:39,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:36:40,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:36:41,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:36:41,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:36:44,172 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:36:44,177 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-14 05:36:44,178 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 05:36:44,178 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-14 05:36:44,181 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:36:44,182 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:36:44,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-14 05:36:44,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 05:36:44,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-14 05:36:44,183 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-14 05:36:44,532 WARN L193 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 25 [2020-10-14 05:36:44,556 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:36:44,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:36:44,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:36:44,562 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:36:44,563 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:36:44,563 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:36:44,564 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 05:36:44,564 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:36:44,564 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:36:44,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:36:44,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:36:44,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:36:44,566 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:36:44,568 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 05:36:44,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:36:44,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:36:44,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:36:45,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:36:45,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:36:45,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:36:45,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:36:47,586 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:36:47,587 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-14 05:36:47,587 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 05:36:47,587 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2974 [2020-10-14 05:36:47,587 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:36:47,588 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:36:47,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-14 05:36:47,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 05:36:47,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-14 05:36:47,588 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:36:48,188 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 38 [2020-10-14 05:36:48,539 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 48 [2020-10-14 05:36:48,702 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 38 [2020-10-14 05:36:48,844 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:36:48,844 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [523222968] [2020-10-14 05:36:48,845 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:36:48,845 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-14 05:36:48,845 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784796661] [2020-10-14 05:36:48,846 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-14 05:36:48,846 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:36:48,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-14 05:36:48,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2020-10-14 05:36:48,852 INFO L87 Difference]: Start difference. First operand 33 states and 36 transitions. Second operand 13 states. [2020-10-14 05:36:50,081 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 71 [2020-10-14 05:36:50,256 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 72 [2020-10-14 05:36:50,633 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 78 [2020-10-14 05:36:50,896 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 60 [2020-10-14 05:36:51,084 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 62 [2020-10-14 05:36:51,434 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2020-10-14 05:36:51,614 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2020-10-14 05:36:51,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:36:51,905 INFO L93 Difference]: Finished difference Result 67 states and 75 transitions. [2020-10-14 05:36:51,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-14 05:36:51,913 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 32 [2020-10-14 05:36:51,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:36:51,914 INFO L225 Difference]: With dead ends: 67 [2020-10-14 05:36:51,914 INFO L226 Difference]: Without dead ends: 37 [2020-10-14 05:36:51,915 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=215, Invalid=841, Unknown=0, NotChecked=0, Total=1056 [2020-10-14 05:36:51,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-14 05:36:51,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2020-10-14 05:36:51,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-14 05:36:51,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2020-10-14 05:36:51,923 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 32 [2020-10-14 05:36:51,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:36:51,923 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2020-10-14 05:36:51,924 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-14 05:36:51,924 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2020-10-14 05:36:51,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-14 05:36:51,925 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:36:51,925 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:36:51,925 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-14 05:36:51,925 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:36:51,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:36:51,926 INFO L82 PathProgramCache]: Analyzing trace with hash 714347447, now seen corresponding path program 5 times [2020-10-14 05:36:51,926 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:36:51,926 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [5477202] [2020-10-14 05:36:51,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:36:51,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:36:51,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:36:52,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:36:52,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:36:53,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:36:53,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:36:53,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:36:54,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:36:55,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:36:56,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:36:57,118 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:36:57,118 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-14 05:36:57,118 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-14 05:36:57,119 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5153 [2020-10-14 05:36:57,119 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:36:57,119 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:36:57,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-14 05:36:57,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 05:36:57,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-14 05:36:57,120 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:36:57,468 WARN L193 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 28 [2020-10-14 05:36:57,482 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:36:57,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:36:57,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:36:57,486 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:36:57,486 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:36:57,487 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:36:57,487 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 05:36:57,487 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:36:57,488 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:36:57,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:36:57,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:36:57,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:36:57,489 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:36:57,491 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 05:36:57,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:36:57,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:36:57,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:36:57,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:36:58,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:36:58,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:36:59,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:36:59,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:36:59,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:36:59,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:37:02,517 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:37:02,518 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-14 05:37:02,518 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-14 05:37:02,518 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-14 05:37:02,518 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:37:02,519 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:37:02,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-14 05:37:02,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 05:37:02,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-14 05:37:02,519 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0