/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 SingleStatement --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=1000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLEST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-industry-pattern/aiob_4.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 19:35:11,247 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 19:35:11,251 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 19:35:11,292 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 19:35:11,293 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 19:35:11,300 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 19:35:11,303 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 19:35:11,306 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 19:35:11,309 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 19:35:11,312 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 19:35:11,313 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 19:35:11,314 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 19:35:11,314 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 19:35:11,317 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 19:35:11,319 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 19:35:11,321 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 19:35:11,322 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 19:35:11,323 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 19:35:11,325 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 19:35:11,333 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 19:35:11,335 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 19:35:11,336 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 19:35:11,337 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 19:35:11,338 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 19:35:11,350 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 19:35:11,351 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 19:35:11,351 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 19:35:11,352 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 19:35:11,353 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 19:35:11,353 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 19:35:11,354 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 19:35:11,355 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 19:35:11,355 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 19:35:11,356 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 19:35:11,357 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 19:35:11,358 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 19:35:11,358 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 19:35:11,359 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 19:35:11,359 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 19:35:11,360 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 19:35:11,361 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 19:35:11,362 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 [2020-09-24 19:35:11,388 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 19:35:11,388 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 19:35:11,389 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 19:35:11,389 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 19:35:11,390 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 19:35:11,390 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 19:35:11,390 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 19:35:11,390 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 19:35:11,390 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 19:35:11,391 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 19:35:11,391 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 19:35:11,391 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 19:35:11,391 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 19:35:11,391 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 19:35:11,392 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 19:35:11,392 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 19:35:11,392 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 19:35:11,392 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 19:35:11,392 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 19:35:11,393 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 19:35:11,393 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 19:35:11,393 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 19:35:11,393 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 19:35:11,393 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 19:35:11,394 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 19:35:11,394 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 19:35:11,394 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 19:35:11,394 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 19:35:11,394 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 19:35:11,395 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 -> SingleStatement 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=1000;interpolation-heuristic=SMALLEST;log-additional-information=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=1000;interpolation-heuristic=SMALLEST;log-additional-information=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=1000;interpolation-heuristic=SMALLEST;log-additional-information=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=1000;interpolation-heuristic=SMALLEST;log-additional-information=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=1000;interpolation-heuristic=SMALLEST;log-additional-information=true; [2020-09-24 19:35:11,864 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 19:35:11,888 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 19:35:11,895 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 19:35:11,897 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 19:35:11,897 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 19:35:11,899 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-industry-pattern/aiob_4.c.v+cfa-reducer.c [2020-09-24 19:35:11,975 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/08f56e64b/2119e60dc2944085a6b80fced772a8b2/FLAG9f1fb7901 [2020-09-24 19:35:12,515 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 19:35:12,516 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-industry-pattern/aiob_4.c.v+cfa-reducer.c [2020-09-24 19:35:12,527 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/08f56e64b/2119e60dc2944085a6b80fced772a8b2/FLAG9f1fb7901 [2020-09-24 19:35:12,818 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/08f56e64b/2119e60dc2944085a6b80fced772a8b2 [2020-09-24 19:35:12,831 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 19:35:12,838 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 19:35:12,844 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 19:35:12,845 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 19:35:12,849 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 19:35:12,850 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 07:35:12" (1/1) ... [2020-09-24 19:35:12,856 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6cc622fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:35:12, skipping insertion in model container [2020-09-24 19:35:12,856 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 07:35:12" (1/1) ... [2020-09-24 19:35:12,867 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 19:35:12,922 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 19:35:13,309 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 19:35:13,323 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 19:35:13,509 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 19:35:13,530 INFO L208 MainTranslator]: Completed translation [2020-09-24 19:35:13,531 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:35:13 WrapperNode [2020-09-24 19:35:13,531 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 19:35:13,532 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 19:35:13,532 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 19:35:13,533 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 19:35:13,549 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:35:13" (1/1) ... [2020-09-24 19:35:13,549 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:35:13" (1/1) ... [2020-09-24 19:35:13,570 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:35:13" (1/1) ... [2020-09-24 19:35:13,571 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:35:13" (1/1) ... [2020-09-24 19:35:13,606 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:35:13" (1/1) ... [2020-09-24 19:35:13,610 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:35:13" (1/1) ... [2020-09-24 19:35:13,614 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:35:13" (1/1) ... [2020-09-24 19:35:13,620 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 19:35:13,621 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 19:35:13,621 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 19:35:13,621 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 19:35:13,623 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:35:13" (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 [2020-09-24 19:35:13,725 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 19:35:13,726 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 19:35:13,726 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 19:35:13,726 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 19:35:13,726 INFO L130 BoogieDeclarations]: Found specification of procedure Id_MCDC_89 [2020-09-24 19:35:13,727 INFO L130 BoogieDeclarations]: Found specification of procedure fopen [2020-09-24 19:35:13,727 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 19:35:13,727 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-24 19:35:13,728 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-24 19:35:13,728 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-24 19:35:13,728 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-09-24 19:35:13,729 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-09-24 19:35:13,729 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-24 19:35:13,729 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 19:35:13,729 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 19:35:13,730 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-24 19:35:13,730 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-09-24 19:35:14,703 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 19:35:14,703 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-24 19:35:14,711 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 07:35:14 BoogieIcfgContainer [2020-09-24 19:35:14,712 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 19:35:14,713 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 19:35:14,713 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 19:35:14,717 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 19:35:14,717 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 07:35:12" (1/3) ... [2020-09-24 19:35:14,718 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ccac591 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 07:35:14, skipping insertion in model container [2020-09-24 19:35:14,719 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:35:13" (2/3) ... [2020-09-24 19:35:14,719 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ccac591 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 07:35:14, skipping insertion in model container [2020-09-24 19:35:14,719 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 07:35:14" (3/3) ... [2020-09-24 19:35:14,722 INFO L109 eAbstractionObserver]: Analyzing ICFG aiob_4.c.v+cfa-reducer.c [2020-09-24 19:35:14,734 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 19:35:14,746 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 19:35:14,768 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 19:35:14,799 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 19:35:14,799 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 19:35:14,799 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 19:35:14,799 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 19:35:14,800 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 19:35:14,800 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 19:35:14,800 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 19:35:14,800 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 19:35:14,827 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states. [2020-09-24 19:35:14,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 318 [2020-09-24 19:35:14,851 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 19:35:14,852 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 19:35:14,853 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 19:35:14,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 19:35:14,866 INFO L82 PathProgramCache]: Analyzing trace with hash 1533680843, now seen corresponding path program 1 times [2020-09-24 19:35:14,878 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 19:35:14,879 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [89165330] [2020-09-24 19:35:14,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 19:35:15,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:35:15,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:35:16,320 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:35:16,321 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 324 [2020-09-24 19:35:16,321 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:35:16,321 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1045 [2020-09-24 19:35:16,323 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:35:16,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 19:35:16,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 317 [2020-09-24 19:35:16,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-24 19:35:16,324 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-09-24 19:35:16,640 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 19:35:16,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:35:16,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:35:16,690 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:35:16,691 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-24 19:35:16,691 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:35:16,691 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 37 [2020-09-24 19:35:16,692 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:35:16,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:35:16,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:35:16,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:35:16,694 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-24 19:35:16,857 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 19:35:16,858 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [89165330] [2020-09-24 19:35:16,861 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 19:35:16,861 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-09-24 19:35:16,862 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956603054] [2020-09-24 19:35:16,876 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-24 19:35:16,876 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 19:35:16,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-24 19:35:16,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-09-24 19:35:16,898 INFO L87 Difference]: Start difference. First operand 348 states. Second operand 6 states. [2020-09-24 19:35:17,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 19:35:17,858 INFO L93 Difference]: Finished difference Result 386 states and 393 transitions. [2020-09-24 19:35:17,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-24 19:35:17,860 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 317 [2020-09-24 19:35:17,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 19:35:17,898 INFO L225 Difference]: With dead ends: 386 [2020-09-24 19:35:17,898 INFO L226 Difference]: Without dead ends: 349 [2020-09-24 19:35:17,905 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2020-09-24 19:35:17,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2020-09-24 19:35:18,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 330. [2020-09-24 19:35:18,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 330 states. [2020-09-24 19:35:18,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 331 transitions. [2020-09-24 19:35:18,014 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 331 transitions. Word has length 317 [2020-09-24 19:35:18,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 19:35:18,020 INFO L479 AbstractCegarLoop]: Abstraction has 330 states and 331 transitions. [2020-09-24 19:35:18,020 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-24 19:35:18,020 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 331 transitions. [2020-09-24 19:35:18,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 318 [2020-09-24 19:35:18,037 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 19:35:18,037 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 19:35:18,038 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 19:35:18,038 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 19:35:18,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 19:35:18,039 INFO L82 PathProgramCache]: Analyzing trace with hash 770044171, now seen corresponding path program 1 times [2020-09-24 19:35:18,039 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 19:35:18,039 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1764123445] [2020-09-24 19:35:18,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 19:35:18,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:35:18,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:35:18,956 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:35:18,956 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 324 [2020-09-24 19:35:18,956 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:35:18,957 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 816 [2020-09-24 19:35:18,957 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:35:18,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-24 19:35:18,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 311 [2020-09-24 19:35:18,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-24 19:35:18,959 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 19:35:19,129 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 19:35:19,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:35:19,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:35:19,159 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:35:19,159 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-24 19:35:19,160 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:35:19,164 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-09-24 19:35:19,164 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:35:19,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:35:19,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:35:19,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:35:19,165 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 19:35:19,280 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 19:35:19,281 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1764123445] [2020-09-24 19:35:19,282 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 19:35:19,282 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-24 19:35:19,283 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507477040] [2020-09-24 19:35:19,287 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 19:35:19,288 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 19:35:19,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 19:35:19,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-24 19:35:19,298 INFO L87 Difference]: Start difference. First operand 330 states and 331 transitions. Second operand 5 states. [2020-09-24 19:35:20,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 19:35:20,136 INFO L93 Difference]: Finished difference Result 374 states and 377 transitions. [2020-09-24 19:35:20,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-24 19:35:20,137 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 317 [2020-09-24 19:35:20,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 19:35:20,143 INFO L225 Difference]: With dead ends: 374 [2020-09-24 19:35:20,144 INFO L226 Difference]: Without dead ends: 349 [2020-09-24 19:35:20,147 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-09-24 19:35:20,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2020-09-24 19:35:20,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 335. [2020-09-24 19:35:20,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 335 states. [2020-09-24 19:35:20,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 336 transitions. [2020-09-24 19:35:20,182 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 336 transitions. Word has length 317 [2020-09-24 19:35:20,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 19:35:20,182 INFO L479 AbstractCegarLoop]: Abstraction has 335 states and 336 transitions. [2020-09-24 19:35:20,182 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 19:35:20,182 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 336 transitions. [2020-09-24 19:35:20,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2020-09-24 19:35:20,193 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 19:35:20,194 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 19:35:20,194 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 19:35:20,195 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 19:35:20,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 19:35:20,195 INFO L82 PathProgramCache]: Analyzing trace with hash -913925315, now seen corresponding path program 1 times [2020-09-24 19:35:20,196 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 19:35:20,196 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1172438315] [2020-09-24 19:35:20,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 19:35:20,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:35:20,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:35:20,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:35:21,300 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:35:21,301 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 341 [2020-09-24 19:35:21,301 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 19:35:21,301 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1014 [2020-09-24 19:35:21,303 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:35:21,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 19:35:21,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 311 [2020-09-24 19:35:21,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-09-24 19:35:21,305 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-09-24 19:35:21,581 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 19:35:21,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:35:21,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:35:21,606 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:35:21,606 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-24 19:35:21,607 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:35:21,607 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-09-24 19:35:21,607 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:35:21,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:35:21,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:35:21,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:35:21,609 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 19:35:21,850 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 19:35:21,851 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1172438315] [2020-09-24 19:35:21,856 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 19:35:21,857 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-09-24 19:35:21,857 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006460] [2020-09-24 19:35:21,858 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-24 19:35:21,861 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 19:35:21,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-24 19:35:21,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-09-24 19:35:21,863 INFO L87 Difference]: Start difference. First operand 335 states and 336 transitions. Second operand 6 states. [2020-09-24 19:35:22,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 19:35:22,738 INFO L93 Difference]: Finished difference Result 391 states and 394 transitions. [2020-09-24 19:35:22,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-24 19:35:22,739 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 334 [2020-09-24 19:35:22,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 19:35:22,741 INFO L225 Difference]: With dead ends: 391 [2020-09-24 19:35:22,742 INFO L226 Difference]: Without dead ends: 366 [2020-09-24 19:35:22,744 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-09-24 19:35:22,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2020-09-24 19:35:22,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 352. [2020-09-24 19:35:22,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 352 states. [2020-09-24 19:35:22,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 353 transitions. [2020-09-24 19:35:22,757 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 353 transitions. Word has length 334 [2020-09-24 19:35:22,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 19:35:22,761 INFO L479 AbstractCegarLoop]: Abstraction has 352 states and 353 transitions. [2020-09-24 19:35:22,761 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-24 19:35:22,761 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 353 transitions. [2020-09-24 19:35:22,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 352 [2020-09-24 19:35:22,767 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 19:35:22,767 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 19:35:22,767 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 19:35:22,768 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 19:35:22,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 19:35:22,768 INFO L82 PathProgramCache]: Analyzing trace with hash 646798155, now seen corresponding path program 2 times [2020-09-24 19:35:22,769 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 19:35:22,769 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1600170444] [2020-09-24 19:35:22,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 19:35:22,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:35:22,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:35:23,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:35:23,967 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:35:23,968 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 358 [2020-09-24 19:35:23,968 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 19:35:23,968 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1087 [2020-09-24 19:35:23,968 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:35:23,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-24 19:35:23,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 311 [2020-09-24 19:35:23,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-09-24 19:35:23,969 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 19:35:24,286 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 19:35:24,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:35:24,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:35:24,311 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:35:24,311 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-24 19:35:24,311 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:35:24,312 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-09-24 19:35:24,312 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:35:24,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:35:24,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:35:24,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:35:24,318 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-09-24 19:35:24,440 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 10 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 19:35:24,441 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1600170444] [2020-09-24 19:35:24,442 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 19:35:24,442 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-24 19:35:24,442 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244977024] [2020-09-24 19:35:24,443 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-24 19:35:24,443 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 19:35:24,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-24 19:35:24,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-09-24 19:35:24,445 INFO L87 Difference]: Start difference. First operand 352 states and 353 transitions. Second operand 7 states. [2020-09-24 19:35:25,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 19:35:25,388 INFO L93 Difference]: Finished difference Result 408 states and 411 transitions. [2020-09-24 19:35:25,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-24 19:35:25,389 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 351 [2020-09-24 19:35:25,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 19:35:25,393 INFO L225 Difference]: With dead ends: 408 [2020-09-24 19:35:25,394 INFO L226 Difference]: Without dead ends: 383 [2020-09-24 19:35:25,395 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-09-24 19:35:25,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2020-09-24 19:35:25,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 369. [2020-09-24 19:35:25,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 369 states. [2020-09-24 19:35:25,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 369 states to 369 states and 370 transitions. [2020-09-24 19:35:25,413 INFO L78 Accepts]: Start accepts. Automaton has 369 states and 370 transitions. Word has length 351 [2020-09-24 19:35:25,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 19:35:25,414 INFO L479 AbstractCegarLoop]: Abstraction has 369 states and 370 transitions. [2020-09-24 19:35:25,414 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-24 19:35:25,414 INFO L276 IsEmpty]: Start isEmpty. Operand 369 states and 370 transitions. [2020-09-24 19:35:25,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 369 [2020-09-24 19:35:25,421 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 19:35:25,422 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 19:35:25,422 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-24 19:35:25,422 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 19:35:25,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 19:35:25,423 INFO L82 PathProgramCache]: Analyzing trace with hash -539428611, now seen corresponding path program 3 times [2020-09-24 19:35:25,424 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 19:35:25,424 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [839961702] [2020-09-24 19:35:25,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 19:35:25,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:35:25,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:35:26,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:35:26,531 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:35:26,531 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 375 [2020-09-24 19:35:26,532 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 19:35:26,532 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1026 [2020-09-24 19:35:26,532 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:35:26,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 19:35:26,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 311 [2020-09-24 19:35:26,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-09-24 19:35:26,534 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 19:35:26,796 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 19:35:26,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:35:26,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:35:26,824 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:35:26,825 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-24 19:35:26,825 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:35:26,826 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-09-24 19:35:26,826 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:35:26,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:35:26,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:35:26,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:35:26,827 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 19:35:27,116 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 15 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 19:35:27,117 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [839961702] [2020-09-24 19:35:27,117 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 19:35:27,118 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-24 19:35:27,118 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071458737] [2020-09-24 19:35:27,119 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-24 19:35:27,120 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 19:35:27,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-24 19:35:27,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-09-24 19:35:27,121 INFO L87 Difference]: Start difference. First operand 369 states and 370 transitions. Second operand 8 states. [2020-09-24 19:35:28,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 19:35:28,164 INFO L93 Difference]: Finished difference Result 425 states and 428 transitions. [2020-09-24 19:35:28,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-24 19:35:28,165 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 368 [2020-09-24 19:35:28,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 19:35:28,168 INFO L225 Difference]: With dead ends: 425 [2020-09-24 19:35:28,168 INFO L226 Difference]: Without dead ends: 400 [2020-09-24 19:35:28,171 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-09-24 19:35:28,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400 states. [2020-09-24 19:35:28,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400 to 386. [2020-09-24 19:35:28,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 386 states. [2020-09-24 19:35:28,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 387 transitions. [2020-09-24 19:35:28,189 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 387 transitions. Word has length 368 [2020-09-24 19:35:28,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 19:35:28,191 INFO L479 AbstractCegarLoop]: Abstraction has 386 states and 387 transitions. [2020-09-24 19:35:28,191 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-24 19:35:28,191 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 387 transitions. [2020-09-24 19:35:28,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 386 [2020-09-24 19:35:28,198 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 19:35:28,199 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 19:35:28,199 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-24 19:35:28,200 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 19:35:28,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 19:35:28,200 INFO L82 PathProgramCache]: Analyzing trace with hash -1425394293, now seen corresponding path program 4 times [2020-09-24 19:35:28,201 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 19:35:28,201 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [29850946] [2020-09-24 19:35:28,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 19:35:28,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:35:28,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:35:29,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:35:29,358 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:35:29,359 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 392 [2020-09-24 19:35:29,359 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 19:35:29,359 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1062 [2020-09-24 19:35:29,359 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:35:29,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-24 19:35:29,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 311 [2020-09-24 19:35:29,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-09-24 19:35:29,360 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 19:35:29,651 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 19:35:29,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:35:29,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:35:29,677 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:35:29,677 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-24 19:35:29,678 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:35:29,678 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-09-24 19:35:29,678 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:35:29,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:35:29,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:35:29,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:35:29,679 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:35:29,838 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 20 proven. 122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 19:35:29,838 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [29850946] [2020-09-24 19:35:29,839 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 19:35:29,840 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-24 19:35:29,840 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582769460] [2020-09-24 19:35:29,841 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-24 19:35:29,841 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 19:35:29,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-24 19:35:29,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-09-24 19:35:29,842 INFO L87 Difference]: Start difference. First operand 386 states and 387 transitions. Second operand 9 states. [2020-09-24 19:35:30,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 19:35:30,956 INFO L93 Difference]: Finished difference Result 442 states and 445 transitions. [2020-09-24 19:35:30,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-24 19:35:30,956 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 385 [2020-09-24 19:35:30,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 19:35:30,959 INFO L225 Difference]: With dead ends: 442 [2020-09-24 19:35:30,959 INFO L226 Difference]: Without dead ends: 417 [2020-09-24 19:35:30,961 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2020-09-24 19:35:30,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2020-09-24 19:35:30,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 403. [2020-09-24 19:35:30,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 403 states. [2020-09-24 19:35:30,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 404 transitions. [2020-09-24 19:35:30,978 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 404 transitions. Word has length 385 [2020-09-24 19:35:30,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 19:35:30,979 INFO L479 AbstractCegarLoop]: Abstraction has 403 states and 404 transitions. [2020-09-24 19:35:30,979 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-24 19:35:30,979 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 404 transitions. [2020-09-24 19:35:30,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 403 [2020-09-24 19:35:30,986 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 19:35:30,986 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 19:35:30,986 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-24 19:35:30,987 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 19:35:30,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 19:35:30,987 INFO L82 PathProgramCache]: Analyzing trace with hash -1042028867, now seen corresponding path program 5 times [2020-09-24 19:35:30,987 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 19:35:30,988 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1952418522] [2020-09-24 19:35:30,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 19:35:31,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:35:31,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:35:32,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:35:32,299 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:35:32,299 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 409 [2020-09-24 19:35:32,299 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 19:35:32,300 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1211 [2020-09-24 19:35:32,300 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:35:32,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-24 19:35:32,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 311 [2020-09-24 19:35:32,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 91 [2020-09-24 19:35:32,301 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:35:32,560 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 19:35:32,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:35:32,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:35:32,586 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:35:32,586 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-24 19:35:32,587 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:35:32,587 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-09-24 19:35:32,587 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:35:32,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:35:32,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:35:32,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:35:32,588 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:35:32,793 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 25 proven. 195 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 19:35:32,794 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1952418522] [2020-09-24 19:35:32,794 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 19:35:32,794 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-24 19:35:32,795 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258037013] [2020-09-24 19:35:32,796 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-24 19:35:32,796 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 19:35:32,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-24 19:35:32,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-09-24 19:35:32,797 INFO L87 Difference]: Start difference. First operand 403 states and 404 transitions. Second operand 10 states. [2020-09-24 19:35:34,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 19:35:34,004 INFO L93 Difference]: Finished difference Result 459 states and 462 transitions. [2020-09-24 19:35:34,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-24 19:35:34,005 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 402 [2020-09-24 19:35:34,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 19:35:34,008 INFO L225 Difference]: With dead ends: 459 [2020-09-24 19:35:34,008 INFO L226 Difference]: Without dead ends: 434 [2020-09-24 19:35:34,009 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2020-09-24 19:35:34,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2020-09-24 19:35:34,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 420. [2020-09-24 19:35:34,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 420 states. [2020-09-24 19:35:34,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 420 states to 420 states and 421 transitions. [2020-09-24 19:35:34,021 INFO L78 Accepts]: Start accepts. Automaton has 420 states and 421 transitions. Word has length 402 [2020-09-24 19:35:34,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 19:35:34,022 INFO L479 AbstractCegarLoop]: Abstraction has 420 states and 421 transitions. [2020-09-24 19:35:34,022 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-24 19:35:34,022 INFO L276 IsEmpty]: Start isEmpty. Operand 420 states and 421 transitions. [2020-09-24 19:35:34,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 420 [2020-09-24 19:35:34,025 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 19:35:34,026 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 19:35:34,026 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-24 19:35:34,026 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 19:35:34,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 19:35:34,027 INFO L82 PathProgramCache]: Analyzing trace with hash 1509982155, now seen corresponding path program 6 times [2020-09-24 19:35:34,027 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 19:35:34,027 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1673190277] [2020-09-24 19:35:34,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 19:35:34,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:35:34,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:35:35,142 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:35:35,143 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 426 [2020-09-24 19:35:35,143 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:35:35,143 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1042 [2020-09-24 19:35:35,144 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:35:35,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-09-24 19:35:35,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 311 [2020-09-24 19:35:35,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 108 [2020-09-24 19:35:35,144 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:35:35,457 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 19:35:35,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:35:35,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:35:35,480 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:35:35,480 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-24 19:35:35,480 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:35:35,480 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-09-24 19:35:35,481 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:35:35,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:35:35,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:35:35,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:35:35,482 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:35:35,725 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 30 proven. 285 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 19:35:35,726 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1673190277] [2020-09-24 19:35:35,726 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 19:35:35,727 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-24 19:35:35,727 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325681778] [2020-09-24 19:35:35,728 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-24 19:35:35,728 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 19:35:35,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-24 19:35:35,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-09-24 19:35:35,729 INFO L87 Difference]: Start difference. First operand 420 states and 421 transitions. Second operand 11 states. [2020-09-24 19:35:37,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 19:35:37,158 INFO L93 Difference]: Finished difference Result 476 states and 479 transitions. [2020-09-24 19:35:37,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-24 19:35:37,158 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 419 [2020-09-24 19:35:37,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 19:35:37,163 INFO L225 Difference]: With dead ends: 476 [2020-09-24 19:35:37,163 INFO L226 Difference]: Without dead ends: 451 [2020-09-24 19:35:37,164 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2020-09-24 19:35:37,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2020-09-24 19:35:37,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 437. [2020-09-24 19:35:37,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 437 states. [2020-09-24 19:35:37,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 437 states to 437 states and 438 transitions. [2020-09-24 19:35:37,177 INFO L78 Accepts]: Start accepts. Automaton has 437 states and 438 transitions. Word has length 419 [2020-09-24 19:35:37,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 19:35:37,178 INFO L479 AbstractCegarLoop]: Abstraction has 437 states and 438 transitions. [2020-09-24 19:35:37,178 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-24 19:35:37,178 INFO L276 IsEmpty]: Start isEmpty. Operand 437 states and 438 transitions. [2020-09-24 19:35:37,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 437 [2020-09-24 19:35:37,181 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 19:35:37,182 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 19:35:37,182 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-24 19:35:37,182 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 19:35:37,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 19:35:37,183 INFO L82 PathProgramCache]: Analyzing trace with hash 1837327485, now seen corresponding path program 7 times [2020-09-24 19:35:37,183 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 19:35:37,183 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2112277907] [2020-09-24 19:35:37,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 19:35:37,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:35:37,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:35:38,274 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:35:38,275 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 443 [2020-09-24 19:35:38,275 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:35:38,275 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1017 [2020-09-24 19:35:38,275 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:35:38,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-24 19:35:38,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 311 [2020-09-24 19:35:38,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 125 [2020-09-24 19:35:38,276 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:35:38,602 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 19:35:38,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:35:38,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:35:38,623 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:35:38,623 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-24 19:35:38,624 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:35:38,624 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-09-24 19:35:38,624 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:35:38,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:35:38,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:35:38,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:35:38,625 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 19:35:38,859 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 35 proven. 392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 19:35:38,864 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2112277907] [2020-09-24 19:35:38,865 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 19:35:38,866 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-09-24 19:35:38,866 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352009091] [2020-09-24 19:35:38,867 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-24 19:35:38,867 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 19:35:38,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-24 19:35:38,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-09-24 19:35:38,868 INFO L87 Difference]: Start difference. First operand 437 states and 438 transitions. Second operand 12 states. [2020-09-24 19:35:40,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 19:35:40,395 INFO L93 Difference]: Finished difference Result 493 states and 496 transitions. [2020-09-24 19:35:40,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-24 19:35:40,396 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 436 [2020-09-24 19:35:40,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 19:35:40,399 INFO L225 Difference]: With dead ends: 493 [2020-09-24 19:35:40,400 INFO L226 Difference]: Without dead ends: 468 [2020-09-24 19:35:40,401 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2020-09-24 19:35:40,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 468 states. [2020-09-24 19:35:40,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 468 to 454. [2020-09-24 19:35:40,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 454 states. [2020-09-24 19:35:40,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 454 states to 454 states and 455 transitions. [2020-09-24 19:35:40,414 INFO L78 Accepts]: Start accepts. Automaton has 454 states and 455 transitions. Word has length 436 [2020-09-24 19:35:40,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 19:35:40,415 INFO L479 AbstractCegarLoop]: Abstraction has 454 states and 455 transitions. [2020-09-24 19:35:40,415 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-24 19:35:40,415 INFO L276 IsEmpty]: Start isEmpty. Operand 454 states and 455 transitions. [2020-09-24 19:35:40,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 454 [2020-09-24 19:35:40,418 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 19:35:40,419 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 19:35:40,419 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-24 19:35:40,419 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 19:35:40,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 19:35:40,420 INFO L82 PathProgramCache]: Analyzing trace with hash 689191435, now seen corresponding path program 8 times [2020-09-24 19:35:40,420 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 19:35:40,420 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [297835571] [2020-09-24 19:35:40,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 19:35:40,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:35:40,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:35:41,567 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:35:41,568 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 460 [2020-09-24 19:35:41,568 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:35:41,568 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1070 [2020-09-24 19:35:41,568 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:35:41,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-09-24 19:35:41,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 311 [2020-09-24 19:35:41,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 142 [2020-09-24 19:35:41,569 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:35:41,945 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 19:35:41,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:35:41,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:35:41,966 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:35:41,967 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-24 19:35:41,967 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:35:41,967 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-09-24 19:35:41,967 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:35:41,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:35:41,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:35:41,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:35:41,968 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:35:42,223 INFO L134 CoverageAnalysis]: Checked inductivity of 556 backedges. 40 proven. 516 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 19:35:42,223 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [297835571] [2020-09-24 19:35:42,223 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 19:35:42,224 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-09-24 19:35:42,224 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459358612] [2020-09-24 19:35:42,225 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-24 19:35:42,225 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 19:35:42,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-24 19:35:42,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2020-09-24 19:35:42,226 INFO L87 Difference]: Start difference. First operand 454 states and 455 transitions. Second operand 13 states. [2020-09-24 19:35:43,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 19:35:44,000 INFO L93 Difference]: Finished difference Result 510 states and 513 transitions. [2020-09-24 19:35:44,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-24 19:35:44,000 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 453 [2020-09-24 19:35:44,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 19:35:44,004 INFO L225 Difference]: With dead ends: 510 [2020-09-24 19:35:44,005 INFO L226 Difference]: Without dead ends: 485 [2020-09-24 19:35:44,006 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2020-09-24 19:35:44,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 485 states. [2020-09-24 19:35:44,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 485 to 471. [2020-09-24 19:35:44,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 471 states. [2020-09-24 19:35:44,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 471 states to 471 states and 472 transitions. [2020-09-24 19:35:44,020 INFO L78 Accepts]: Start accepts. Automaton has 471 states and 472 transitions. Word has length 453 [2020-09-24 19:35:44,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 19:35:44,021 INFO L479 AbstractCegarLoop]: Abstraction has 471 states and 472 transitions. [2020-09-24 19:35:44,021 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-24 19:35:44,021 INFO L276 IsEmpty]: Start isEmpty. Operand 471 states and 472 transitions. [2020-09-24 19:35:44,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 471 [2020-09-24 19:35:44,024 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 19:35:44,025 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 19:35:44,025 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-24 19:35:44,025 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 19:35:44,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 19:35:44,026 INFO L82 PathProgramCache]: Analyzing trace with hash 1771270717, now seen corresponding path program 9 times [2020-09-24 19:35:44,026 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 19:35:44,026 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1254858337] [2020-09-24 19:35:44,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 19:35:44,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:35:44,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:35:45,104 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:35:45,104 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 477 [2020-09-24 19:35:45,104 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:35:45,105 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1002 [2020-09-24 19:35:45,105 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:35:45,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-09-24 19:35:45,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 311 [2020-09-24 19:35:45,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 159 [2020-09-24 19:35:45,106 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 19:35:45,471 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 19:35:45,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:35:45,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:35:45,491 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:35:45,491 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-24 19:35:45,491 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:35:45,492 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-09-24 19:35:45,492 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:35:45,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:35:45,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:35:45,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:35:45,493 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:35:45,712 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 45 proven. 657 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 19:35:45,712 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1254858337] [2020-09-24 19:35:45,713 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 19:35:45,713 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-09-24 19:35:45,713 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136033035] [2020-09-24 19:35:45,715 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-24 19:35:45,715 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 19:35:45,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-24 19:35:45,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2020-09-24 19:35:45,716 INFO L87 Difference]: Start difference. First operand 471 states and 472 transitions. Second operand 14 states. [2020-09-24 19:35:47,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 19:35:47,755 INFO L93 Difference]: Finished difference Result 527 states and 530 transitions. [2020-09-24 19:35:47,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-24 19:35:47,756 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 470 [2020-09-24 19:35:47,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 19:35:47,761 INFO L225 Difference]: With dead ends: 527 [2020-09-24 19:35:47,761 INFO L226 Difference]: Without dead ends: 502 [2020-09-24 19:35:47,762 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2020-09-24 19:35:47,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 502 states. [2020-09-24 19:35:47,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 502 to 488. [2020-09-24 19:35:47,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 488 states. [2020-09-24 19:35:47,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 488 states to 488 states and 489 transitions. [2020-09-24 19:35:47,778 INFO L78 Accepts]: Start accepts. Automaton has 488 states and 489 transitions. Word has length 470 [2020-09-24 19:35:47,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 19:35:47,779 INFO L479 AbstractCegarLoop]: Abstraction has 488 states and 489 transitions. [2020-09-24 19:35:47,779 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-24 19:35:47,779 INFO L276 IsEmpty]: Start isEmpty. Operand 488 states and 489 transitions. [2020-09-24 19:35:47,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 488 [2020-09-24 19:35:47,783 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 19:35:47,784 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 19:35:47,784 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-09-24 19:35:47,784 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 19:35:47,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 19:35:47,785 INFO L82 PathProgramCache]: Analyzing trace with hash -1528208309, now seen corresponding path program 10 times [2020-09-24 19:35:47,785 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 19:35:47,785 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1973170217] [2020-09-24 19:35:47,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 19:35:47,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:35:47,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:35:48,904 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:35:48,904 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 494 [2020-09-24 19:35:48,905 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:35:48,905 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1038 [2020-09-24 19:35:48,905 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:35:48,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-09-24 19:35:48,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 311 [2020-09-24 19:35:48,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 176 [2020-09-24 19:35:48,907 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 19:35:49,296 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 19:35:49,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:35:49,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:35:49,316 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:35:49,317 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-24 19:35:49,317 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:35:49,317 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-09-24 19:35:49,317 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:35:49,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:35:49,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:35:49,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:35:49,318 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:35:49,631 INFO L134 CoverageAnalysis]: Checked inductivity of 865 backedges. 50 proven. 815 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 19:35:49,632 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1973170217] [2020-09-24 19:35:49,632 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 19:35:49,632 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-09-24 19:35:49,633 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922934292] [2020-09-24 19:35:49,634 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-24 19:35:49,634 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 19:35:49,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-24 19:35:49,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2020-09-24 19:35:49,635 INFO L87 Difference]: Start difference. First operand 488 states and 489 transitions. Second operand 15 states. [2020-09-24 19:35:51,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 19:35:51,752 INFO L93 Difference]: Finished difference Result 544 states and 547 transitions. [2020-09-24 19:35:51,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-24 19:35:51,753 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 487 [2020-09-24 19:35:51,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 19:35:51,757 INFO L225 Difference]: With dead ends: 544 [2020-09-24 19:35:51,757 INFO L226 Difference]: Without dead ends: 519 [2020-09-24 19:35:51,758 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2020-09-24 19:35:51,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 519 states. [2020-09-24 19:35:51,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 519 to 505. [2020-09-24 19:35:51,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 505 states. [2020-09-24 19:35:51,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 505 states to 505 states and 506 transitions. [2020-09-24 19:35:51,779 INFO L78 Accepts]: Start accepts. Automaton has 505 states and 506 transitions. Word has length 487 [2020-09-24 19:35:51,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 19:35:51,780 INFO L479 AbstractCegarLoop]: Abstraction has 505 states and 506 transitions. [2020-09-24 19:35:51,780 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-24 19:35:51,781 INFO L276 IsEmpty]: Start isEmpty. Operand 505 states and 506 transitions. [2020-09-24 19:35:51,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 505 [2020-09-24 19:35:51,784 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 19:35:51,785 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 19:35:51,785 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-09-24 19:35:51,785 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 19:35:51,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 19:35:51,786 INFO L82 PathProgramCache]: Analyzing trace with hash -2047864835, now seen corresponding path program 11 times [2020-09-24 19:35:51,786 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 19:35:51,786 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [34603343] [2020-09-24 19:35:51,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 19:35:51,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:35:51,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:35:52,908 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:35:52,908 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 511 [2020-09-24 19:35:52,908 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:35:52,909 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1033 [2020-09-24 19:35:52,909 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:35:52,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-09-24 19:35:52,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 311 [2020-09-24 19:35:52,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 193 [2020-09-24 19:35:52,910 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:35:53,364 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 19:35:53,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:35:53,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:35:53,384 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:35:53,385 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-24 19:35:53,385 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:35:53,385 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-09-24 19:35:53,388 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:35:53,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:35:53,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:35:53,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:35:53,389 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:35:53,605 INFO L134 CoverageAnalysis]: Checked inductivity of 1045 backedges. 55 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 19:35:53,606 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [34603343] [2020-09-24 19:35:53,606 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 19:35:53,606 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-09-24 19:35:53,606 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347920886] [2020-09-24 19:35:53,607 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-24 19:35:53,607 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 19:35:53,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-24 19:35:53,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2020-09-24 19:35:53,608 INFO L87 Difference]: Start difference. First operand 505 states and 506 transitions. Second operand 16 states. [2020-09-24 19:35:55,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 19:35:55,932 INFO L93 Difference]: Finished difference Result 561 states and 564 transitions. [2020-09-24 19:35:55,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-24 19:35:55,933 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 504 [2020-09-24 19:35:55,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 19:35:55,937 INFO L225 Difference]: With dead ends: 561 [2020-09-24 19:35:55,937 INFO L226 Difference]: Without dead ends: 536 [2020-09-24 19:35:55,938 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=81, Invalid=731, Unknown=0, NotChecked=0, Total=812 [2020-09-24 19:35:55,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 536 states. [2020-09-24 19:35:55,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 536 to 522. [2020-09-24 19:35:55,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 522 states. [2020-09-24 19:35:55,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 522 states to 522 states and 523 transitions. [2020-09-24 19:35:55,956 INFO L78 Accepts]: Start accepts. Automaton has 522 states and 523 transitions. Word has length 504 [2020-09-24 19:35:55,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 19:35:55,957 INFO L479 AbstractCegarLoop]: Abstraction has 522 states and 523 transitions. [2020-09-24 19:35:55,957 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-24 19:35:55,957 INFO L276 IsEmpty]: Start isEmpty. Operand 522 states and 523 transitions. [2020-09-24 19:35:55,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 522 [2020-09-24 19:35:55,961 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 19:35:55,962 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 19:35:55,962 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-09-24 19:35:55,962 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 19:35:55,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 19:35:55,963 INFO L82 PathProgramCache]: Analyzing trace with hash 824442507, now seen corresponding path program 12 times [2020-09-24 19:35:55,963 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 19:35:55,964 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1073288880] [2020-09-24 19:35:55,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 19:35:56,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:35:56,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:35:57,089 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:35:57,090 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 528 [2020-09-24 19:35:57,090 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:35:57,090 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1036 [2020-09-24 19:35:57,090 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:35:57,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-09-24 19:35:57,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 311 [2020-09-24 19:35:57,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 210 [2020-09-24 19:35:57,091 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:35:57,571 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 19:35:57,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:35:57,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:35:57,593 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:35:57,593 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-24 19:35:57,594 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:35:57,594 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-09-24 19:35:57,594 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:35:57,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:35:57,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:35:57,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:35:57,595 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:35:57,908 INFO L134 CoverageAnalysis]: Checked inductivity of 1242 backedges. 60 proven. 1182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 19:35:57,908 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1073288880] [2020-09-24 19:35:57,908 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 19:35:57,908 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-09-24 19:35:57,909 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397623803] [2020-09-24 19:35:57,909 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-24 19:35:57,909 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 19:35:57,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-24 19:35:57,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2020-09-24 19:35:57,910 INFO L87 Difference]: Start difference. First operand 522 states and 523 transitions. Second operand 17 states.