/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=5000 --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 18:31:01,251 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 18:31:01,255 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 18:31:01,281 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 18:31:01,282 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 18:31:01,283 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 18:31:01,284 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 18:31:01,286 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 18:31:01,288 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 18:31:01,289 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 18:31:01,290 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 18:31:01,291 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 18:31:01,291 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 18:31:01,294 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 18:31:01,296 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 18:31:01,298 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 18:31:01,299 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 18:31:01,303 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 18:31:01,306 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 18:31:01,309 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 18:31:01,312 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 18:31:01,315 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 18:31:01,316 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 18:31:01,317 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 18:31:01,321 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 18:31:01,322 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 18:31:01,322 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 18:31:01,323 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 18:31:01,324 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 18:31:01,327 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 18:31:01,327 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 18:31:01,328 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 18:31:01,329 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 18:31:01,329 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 18:31:01,331 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 18:31:01,331 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 18:31:01,332 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 18:31:01,332 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 18:31:01,332 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 18:31:01,333 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 18:31:01,335 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 18:31:01,336 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 18:31:01,393 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 18:31:01,394 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 18:31:01,395 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 18:31:01,395 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 18:31:01,395 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 18:31:01,395 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 18:31:01,396 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 18:31:01,396 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 18:31:01,396 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 18:31:01,396 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 18:31:01,396 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 18:31:01,397 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 18:31:01,397 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 18:31:01,397 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 18:31:01,397 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 18:31:01,397 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 18:31:01,398 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 18:31:01,398 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 18:31:01,398 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 18:31:01,398 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 18:31:01,399 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 18:31:01,399 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 18:31:01,399 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 18:31:01,399 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 18:31:01,399 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 18:31:01,400 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 18:31:01,400 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 18:31:01,400 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 18:31:01,400 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 18:31:01,400 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=5000;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=5000;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=5000;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=5000;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=5000;interpolation-heuristic=SMALLEST;log-additional-information=true; [2020-09-24 18:31:01,893 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 18:31:01,920 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 18:31:01,924 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 18:31:01,927 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 18:31:01,928 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 18:31:01,930 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-industry-pattern/aiob_4.c.v+cfa-reducer.c [2020-09-24 18:31:02,019 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a99130748/ee0a8661e217464ca8ae0f3c837a3cf4/FLAG10a2e5efe [2020-09-24 18:31:02,597 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 18:31:02,598 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-industry-pattern/aiob_4.c.v+cfa-reducer.c [2020-09-24 18:31:02,611 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a99130748/ee0a8661e217464ca8ae0f3c837a3cf4/FLAG10a2e5efe [2020-09-24 18:31:02,872 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a99130748/ee0a8661e217464ca8ae0f3c837a3cf4 [2020-09-24 18:31:02,885 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 18:31:02,892 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 18:31:02,893 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 18:31:02,894 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 18:31:02,898 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 18:31:02,899 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 06:31:02" (1/1) ... [2020-09-24 18:31:02,903 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7ab3eb2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:31:02, skipping insertion in model container [2020-09-24 18:31:02,904 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 06:31:02" (1/1) ... [2020-09-24 18:31:02,913 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 18:31:02,961 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 18:31:03,273 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 18:31:03,285 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 18:31:03,465 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 18:31:03,484 INFO L208 MainTranslator]: Completed translation [2020-09-24 18:31:03,484 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:31:03 WrapperNode [2020-09-24 18:31:03,484 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 18:31:03,485 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 18:31:03,485 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 18:31:03,486 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 18:31:03,501 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:31:03" (1/1) ... [2020-09-24 18:31:03,501 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:31:03" (1/1) ... [2020-09-24 18:31:03,521 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:31:03" (1/1) ... [2020-09-24 18:31:03,521 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:31:03" (1/1) ... [2020-09-24 18:31:03,553 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:31:03" (1/1) ... [2020-09-24 18:31:03,558 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:31:03" (1/1) ... [2020-09-24 18:31:03,562 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:31:03" (1/1) ... [2020-09-24 18:31:03,568 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 18:31:03,569 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 18:31:03,569 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 18:31:03,569 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 18:31:03,570 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:31:03" (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 18:31:03,670 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 18:31:03,671 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 18:31:03,671 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 18:31:03,671 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 18:31:03,672 INFO L130 BoogieDeclarations]: Found specification of procedure Id_MCDC_89 [2020-09-24 18:31:03,673 INFO L130 BoogieDeclarations]: Found specification of procedure fopen [2020-09-24 18:31:03,673 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 18:31:03,673 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-24 18:31:03,674 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-24 18:31:03,675 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-24 18:31:03,675 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-09-24 18:31:03,675 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-09-24 18:31:03,675 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-24 18:31:03,675 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 18:31:03,676 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 18:31:03,677 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-24 18:31:03,677 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-09-24 18:31:04,585 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 18:31:04,585 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-24 18:31:04,593 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 06:31:04 BoogieIcfgContainer [2020-09-24 18:31:04,594 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 18:31:04,596 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 18:31:04,596 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 18:31:04,600 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 18:31:04,600 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 06:31:02" (1/3) ... [2020-09-24 18:31:04,601 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@633b3cdc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 06:31:04, skipping insertion in model container [2020-09-24 18:31:04,601 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:31:03" (2/3) ... [2020-09-24 18:31:04,602 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@633b3cdc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 06:31:04, skipping insertion in model container [2020-09-24 18:31:04,602 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 06:31:04" (3/3) ... [2020-09-24 18:31:04,604 INFO L109 eAbstractionObserver]: Analyzing ICFG aiob_4.c.v+cfa-reducer.c [2020-09-24 18:31:04,616 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 18:31:04,628 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 18:31:04,650 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 18:31:04,685 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 18:31:04,686 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 18:31:04,686 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 18:31:04,686 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 18:31:04,686 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 18:31:04,686 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 18:31:04,687 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 18:31:04,687 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 18:31:04,715 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states. [2020-09-24 18:31:04,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 318 [2020-09-24 18:31:04,737 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 18:31:04,738 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 18:31:04,739 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 18:31:04,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 18:31:04,747 INFO L82 PathProgramCache]: Analyzing trace with hash 1533680843, now seen corresponding path program 1 times [2020-09-24 18:31:04,758 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 18:31:04,759 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [96770266] [2020-09-24 18:31:04,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 18:31:05,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:31:05,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:31:06,142 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:31:06,143 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 324 [2020-09-24 18:31:06,143 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:31:06,143 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1017 [2020-09-24 18:31:06,146 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:31:06,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 18:31:06,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 317 [2020-09-24 18:31:06,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-24 18:31:06,147 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-09-24 18:31:06,468 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 18:31:06,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:31:06,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:31:06,498 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:31:06,498 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-24 18:31:06,498 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:31:06,499 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-09-24 18:31:06,499 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:31:06,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:31:06,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:31:06,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:31:06,500 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 18:31:06,639 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 18:31:06,640 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [96770266] [2020-09-24 18:31:06,642 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 18:31:06,642 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-09-24 18:31:06,643 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357050356] [2020-09-24 18:31:06,650 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-24 18:31:06,651 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 18:31:06,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-24 18:31:06,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-09-24 18:31:06,671 INFO L87 Difference]: Start difference. First operand 348 states. Second operand 6 states. [2020-09-24 18:31:07,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 18:31:07,396 INFO L93 Difference]: Finished difference Result 386 states and 393 transitions. [2020-09-24 18:31:07,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-24 18:31:07,398 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 317 [2020-09-24 18:31:07,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 18:31:07,418 INFO L225 Difference]: With dead ends: 386 [2020-09-24 18:31:07,418 INFO L226 Difference]: Without dead ends: 349 [2020-09-24 18:31:07,423 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 18:31:07,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2020-09-24 18:31:07,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 330. [2020-09-24 18:31:07,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 330 states. [2020-09-24 18:31:07,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 331 transitions. [2020-09-24 18:31:07,494 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 331 transitions. Word has length 317 [2020-09-24 18:31:07,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 18:31:07,497 INFO L479 AbstractCegarLoop]: Abstraction has 330 states and 331 transitions. [2020-09-24 18:31:07,497 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-24 18:31:07,498 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 331 transitions. [2020-09-24 18:31:07,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 318 [2020-09-24 18:31:07,513 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 18:31:07,514 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 18:31:07,514 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 18:31:07,515 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 18:31:07,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 18:31:07,517 INFO L82 PathProgramCache]: Analyzing trace with hash 770044171, now seen corresponding path program 1 times [2020-09-24 18:31:07,517 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 18:31:07,517 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [124938462] [2020-09-24 18:31:07,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 18:31:07,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:31:07,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:31:08,351 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:31:08,351 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 324 [2020-09-24 18:31:08,351 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:31:08,352 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 735 [2020-09-24 18:31:08,352 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:31:08,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-24 18:31:08,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 311 [2020-09-24 18:31:08,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-24 18:31:08,353 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 18:31:08,497 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 18:31:08,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:31:08,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:31:08,525 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:31:08,525 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-24 18:31:08,526 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:31:08,526 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-09-24 18:31:08,526 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:31:08,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:31:08,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:31:08,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:31:08,528 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 18:31:08,716 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 18:31:08,717 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [124938462] [2020-09-24 18:31:08,717 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 18:31:08,717 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-24 18:31:08,717 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545772511] [2020-09-24 18:31:08,723 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 18:31:08,724 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 18:31:08,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 18:31:08,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-24 18:31:08,733 INFO L87 Difference]: Start difference. First operand 330 states and 331 transitions. Second operand 5 states. [2020-09-24 18:31:09,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 18:31:09,599 INFO L93 Difference]: Finished difference Result 374 states and 377 transitions. [2020-09-24 18:31:09,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-24 18:31:09,600 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 317 [2020-09-24 18:31:09,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 18:31:09,611 INFO L225 Difference]: With dead ends: 374 [2020-09-24 18:31:09,612 INFO L226 Difference]: Without dead ends: 349 [2020-09-24 18:31:09,615 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-09-24 18:31:09,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2020-09-24 18:31:09,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 335. [2020-09-24 18:31:09,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 335 states. [2020-09-24 18:31:09,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 336 transitions. [2020-09-24 18:31:09,662 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 336 transitions. Word has length 317 [2020-09-24 18:31:09,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 18:31:09,667 INFO L479 AbstractCegarLoop]: Abstraction has 335 states and 336 transitions. [2020-09-24 18:31:09,667 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 18:31:09,667 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 336 transitions. [2020-09-24 18:31:09,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2020-09-24 18:31:09,678 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 18:31:09,679 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 18:31:09,679 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 18:31:09,679 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 18:31:09,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 18:31:09,680 INFO L82 PathProgramCache]: Analyzing trace with hash -913925315, now seen corresponding path program 1 times [2020-09-24 18:31:09,680 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 18:31:09,681 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1739965511] [2020-09-24 18:31:09,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 18:31:09,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:31:09,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:31:10,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:31:12,439 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:31:12,440 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 341 [2020-09-24 18:31:12,440 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 18:31:12,440 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2670 [2020-09-24 18:31:12,441 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:31:12,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 18:31:12,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 311 [2020-09-24 18:31:12,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-09-24 18:31:12,442 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 18:31:12,655 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 18:31:12,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:31:12,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:31:12,700 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:31:12,701 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-24 18:31:12,701 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:31:12,701 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 39 [2020-09-24 18:31:12,701 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:31:12,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:31:12,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:31:12,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:31:12,702 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:31:12,786 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 18:31:12,787 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1739965511] [2020-09-24 18:31:12,787 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 18:31:12,787 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-09-24 18:31:12,788 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006460] [2020-09-24 18:31:12,788 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-24 18:31:12,789 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 18:31:12,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-24 18:31:12,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-09-24 18:31:12,790 INFO L87 Difference]: Start difference. First operand 335 states and 336 transitions. Second operand 6 states. [2020-09-24 18:31:13,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 18:31:13,594 INFO L93 Difference]: Finished difference Result 391 states and 394 transitions. [2020-09-24 18:31:13,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-24 18:31:13,595 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 334 [2020-09-24 18:31:13,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 18:31:13,597 INFO L225 Difference]: With dead ends: 391 [2020-09-24 18:31:13,598 INFO L226 Difference]: Without dead ends: 366 [2020-09-24 18:31:13,600 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 18:31:13,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2020-09-24 18:31:13,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 352. [2020-09-24 18:31:13,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 352 states. [2020-09-24 18:31:13,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 353 transitions. [2020-09-24 18:31:13,626 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 353 transitions. Word has length 334 [2020-09-24 18:31:13,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 18:31:13,629 INFO L479 AbstractCegarLoop]: Abstraction has 352 states and 353 transitions. [2020-09-24 18:31:13,629 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-24 18:31:13,629 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 353 transitions. [2020-09-24 18:31:13,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 352 [2020-09-24 18:31:13,635 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 18:31:13,635 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 18:31:13,635 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 18:31:13,636 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 18:31:13,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 18:31:13,636 INFO L82 PathProgramCache]: Analyzing trace with hash 646798155, now seen corresponding path program 2 times [2020-09-24 18:31:13,636 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 18:31:13,637 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1600170444] [2020-09-24 18:31:13,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 18:31:13,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:31:13,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:31:14,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:31:15,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:31:18,711 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:31:18,712 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 358 [2020-09-24 18:31:18,712 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-24 18:31:18,712 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-09-24 18:31:18,713 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:31:18,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-24 18:31:18,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 311 [2020-09-24 18:31:18,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-09-24 18:31:18,714 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 18:31:18,969 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 18:31:18,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:31:18,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:31:18,987 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:31:18,987 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-24 18:31:18,988 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:31:18,988 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-09-24 18:31:18,988 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:31:18,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:31:18,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:31:18,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:31:18,994 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-09-24 18:31:19,134 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 18:31:19,136 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1600170444] [2020-09-24 18:31:19,136 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 18:31:19,137 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-24 18:31:19,137 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203275926] [2020-09-24 18:31:19,138 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-24 18:31:19,138 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 18:31:19,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-24 18:31:19,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-09-24 18:31:19,140 INFO L87 Difference]: Start difference. First operand 352 states and 353 transitions. Second operand 7 states. [2020-09-24 18:31:19,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 18:31:19,996 INFO L93 Difference]: Finished difference Result 408 states and 411 transitions. [2020-09-24 18:31:19,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-24 18:31:19,997 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 351 [2020-09-24 18:31:19,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 18:31:20,006 INFO L225 Difference]: With dead ends: 408 [2020-09-24 18:31:20,007 INFO L226 Difference]: Without dead ends: 383 [2020-09-24 18:31:20,008 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 18:31:20,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2020-09-24 18:31:20,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 369. [2020-09-24 18:31:20,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 369 states. [2020-09-24 18:31:20,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 369 states to 369 states and 370 transitions. [2020-09-24 18:31:20,026 INFO L78 Accepts]: Start accepts. Automaton has 369 states and 370 transitions. Word has length 351 [2020-09-24 18:31:20,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 18:31:20,027 INFO L479 AbstractCegarLoop]: Abstraction has 369 states and 370 transitions. [2020-09-24 18:31:20,027 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-24 18:31:20,027 INFO L276 IsEmpty]: Start isEmpty. Operand 369 states and 370 transitions. [2020-09-24 18:31:20,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 369 [2020-09-24 18:31:20,037 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 18:31:20,037 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 18:31:20,037 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-24 18:31:20,037 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 18:31:20,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 18:31:20,038 INFO L82 PathProgramCache]: Analyzing trace with hash -539428611, now seen corresponding path program 3 times [2020-09-24 18:31:20,038 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 18:31:20,039 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1281049777] [2020-09-24 18:31:20,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 18:31:20,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:31:20,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:31:20,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:31:23,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:31:25,243 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:31:25,243 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 375 [2020-09-24 18:31:25,244 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-24 18:31:25,244 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5126 [2020-09-24 18:31:25,244 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:31:25,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 18:31:25,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 311 [2020-09-24 18:31:25,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-09-24 18:31:25,245 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:31:25,448 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 18:31:25,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:31:25,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:31:25,469 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:31:25,469 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-24 18:31:25,469 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:31:25,470 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-09-24 18:31:25,470 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:31:25,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:31:25,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:31:25,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:31:25,471 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:31:25,601 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 18:31:25,602 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1281049777] [2020-09-24 18:31:25,602 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 18:31:25,602 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-24 18:31:25,602 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721606051] [2020-09-24 18:31:25,603 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-24 18:31:25,603 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 18:31:25,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-24 18:31:25,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-09-24 18:31:25,604 INFO L87 Difference]: Start difference. First operand 369 states and 370 transitions. Second operand 8 states. [2020-09-24 18:31:26,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 18:31:26,600 INFO L93 Difference]: Finished difference Result 425 states and 428 transitions. [2020-09-24 18:31:26,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-24 18:31:26,600 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 368 [2020-09-24 18:31:26,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 18:31:26,603 INFO L225 Difference]: With dead ends: 425 [2020-09-24 18:31:26,603 INFO L226 Difference]: Without dead ends: 400 [2020-09-24 18:31:26,605 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 18:31:26,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400 states. [2020-09-24 18:31:26,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400 to 386. [2020-09-24 18:31:26,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 386 states. [2020-09-24 18:31:26,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 387 transitions. [2020-09-24 18:31:26,617 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 387 transitions. Word has length 368 [2020-09-24 18:31:26,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 18:31:26,618 INFO L479 AbstractCegarLoop]: Abstraction has 386 states and 387 transitions. [2020-09-24 18:31:26,618 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-24 18:31:26,619 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 387 transitions. [2020-09-24 18:31:26,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 386 [2020-09-24 18:31:26,625 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 18:31:26,626 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 18:31:26,626 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-24 18:31:26,626 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 18:31:26,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 18:31:26,627 INFO L82 PathProgramCache]: Analyzing trace with hash -1425394293, now seen corresponding path program 4 times [2020-09-24 18:31:26,627 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 18:31:26,627 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [51832340] [2020-09-24 18:31:26,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 18:31:26,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:31:26,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:31:27,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:31:29,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:31:32,227 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:31:32,227 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 392 [2020-09-24 18:31:32,228 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-24 18:31:32,228 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5533 [2020-09-24 18:31:32,228 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:31:32,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-24 18:31:32,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 311 [2020-09-24 18:31:32,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-09-24 18:31:32,229 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:31:32,440 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 18:31:32,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:31:32,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:31:32,459 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:31:32,459 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-24 18:31:32,460 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:31:32,460 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-09-24 18:31:32,460 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:31:32,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:31:32,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:31:32,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:31:32,461 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:31:32,585 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 18:31:32,585 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [51832340] [2020-09-24 18:31:32,586 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 18:31:32,586 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-24 18:31:32,586 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568597190] [2020-09-24 18:31:32,587 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-24 18:31:32,587 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 18:31:32,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-24 18:31:32,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-09-24 18:31:32,588 INFO L87 Difference]: Start difference. First operand 386 states and 387 transitions. Second operand 9 states. [2020-09-24 18:31:33,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 18:31:33,799 INFO L93 Difference]: Finished difference Result 442 states and 445 transitions. [2020-09-24 18:31:33,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-24 18:31:33,803 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 385 [2020-09-24 18:31:33,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 18:31:33,807 INFO L225 Difference]: With dead ends: 442 [2020-09-24 18:31:33,807 INFO L226 Difference]: Without dead ends: 417 [2020-09-24 18:31:33,808 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 18:31:33,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2020-09-24 18:31:33,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 403. [2020-09-24 18:31:33,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 403 states. [2020-09-24 18:31:33,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 404 transitions. [2020-09-24 18:31:33,833 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 404 transitions. Word has length 385 [2020-09-24 18:31:33,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 18:31:33,834 INFO L479 AbstractCegarLoop]: Abstraction has 403 states and 404 transitions. [2020-09-24 18:31:33,834 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-24 18:31:33,835 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 404 transitions. [2020-09-24 18:31:33,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 403 [2020-09-24 18:31:33,842 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 18:31:33,843 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 18:31:33,843 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-24 18:31:33,844 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 18:31:33,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 18:31:33,844 INFO L82 PathProgramCache]: Analyzing trace with hash -1042028867, now seen corresponding path program 5 times [2020-09-24 18:31:33,844 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 18:31:33,845 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [227020423] [2020-09-24 18:31:33,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 18:31:33,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:31:33,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:31:34,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:31:36,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:31:38,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:31:39,020 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:31:39,021 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 409 [2020-09-24 18:31:39,021 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-24 18:31:39,021 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5106 [2020-09-24 18:31:39,021 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:31:39,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-24 18:31:39,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 311 [2020-09-24 18:31:39,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 91 [2020-09-24 18:31:39,022 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:31:39,259 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 18:31:39,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:31:39,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:31:39,278 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:31:39,278 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-24 18:31:39,278 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:31:39,279 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-09-24 18:31:39,279 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:31:39,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:31:39,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:31:39,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:31:39,279 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:31:39,368 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 18:31:39,369 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [227020423] [2020-09-24 18:31:39,369 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 18:31:39,369 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-24 18:31:39,370 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954476306] [2020-09-24 18:31:39,371 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-24 18:31:39,371 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 18:31:39,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-24 18:31:39,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-09-24 18:31:39,371 INFO L87 Difference]: Start difference. First operand 403 states and 404 transitions. Second operand 10 states. [2020-09-24 18:31:40,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 18:31:40,520 INFO L93 Difference]: Finished difference Result 459 states and 462 transitions. [2020-09-24 18:31:40,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-24 18:31:40,521 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 402 [2020-09-24 18:31:40,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 18:31:40,525 INFO L225 Difference]: With dead ends: 459 [2020-09-24 18:31:40,525 INFO L226 Difference]: Without dead ends: 434 [2020-09-24 18:31:40,526 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 18:31:40,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2020-09-24 18:31:40,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 420. [2020-09-24 18:31:40,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 420 states. [2020-09-24 18:31:40,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 420 states to 420 states and 421 transitions. [2020-09-24 18:31:40,540 INFO L78 Accepts]: Start accepts. Automaton has 420 states and 421 transitions. Word has length 402 [2020-09-24 18:31:40,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 18:31:40,541 INFO L479 AbstractCegarLoop]: Abstraction has 420 states and 421 transitions. [2020-09-24 18:31:40,541 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-24 18:31:40,541 INFO L276 IsEmpty]: Start isEmpty. Operand 420 states and 421 transitions. [2020-09-24 18:31:40,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 420 [2020-09-24 18:31:40,544 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 18:31:40,544 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 18:31:40,544 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-24 18:31:40,545 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 18:31:40,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 18:31:40,545 INFO L82 PathProgramCache]: Analyzing trace with hash 1509982155, now seen corresponding path program 6 times [2020-09-24 18:31:40,545 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 18:31:40,546 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1082642870] [2020-09-24 18:31:40,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 18:31:40,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:31:40,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:31:41,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:31:42,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:31:45,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:31:45,653 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:31:45,653 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 426 [2020-09-24 18:31:45,653 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-24 18:31:45,653 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5044 [2020-09-24 18:31:45,653 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:31:45,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-09-24 18:31:45,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 311 [2020-09-24 18:31:45,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 108 [2020-09-24 18:31:45,654 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:31:45,913 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 18:31:45,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:31:45,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:31:45,932 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:31:45,932 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-24 18:31:45,932 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:31:45,933 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-09-24 18:31:45,933 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:31:45,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:31:45,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:31:45,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:31:45,934 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:31:46,068 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 18:31:46,068 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1082642870] [2020-09-24 18:31:46,068 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 18:31:46,069 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-24 18:31:46,069 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794371418] [2020-09-24 18:31:46,069 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-24 18:31:46,069 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 18:31:46,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-24 18:31:46,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-09-24 18:31:46,070 INFO L87 Difference]: Start difference. First operand 420 states and 421 transitions. Second operand 11 states. [2020-09-24 18:31:47,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 18:31:47,427 INFO L93 Difference]: Finished difference Result 476 states and 479 transitions. [2020-09-24 18:31:47,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-24 18:31:47,428 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 419 [2020-09-24 18:31:47,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 18:31:47,432 INFO L225 Difference]: With dead ends: 476 [2020-09-24 18:31:47,432 INFO L226 Difference]: Without dead ends: 451 [2020-09-24 18:31:47,433 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 18:31:47,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2020-09-24 18:31:47,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 437. [2020-09-24 18:31:47,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 437 states. [2020-09-24 18:31:47,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 437 states to 437 states and 438 transitions. [2020-09-24 18:31:47,447 INFO L78 Accepts]: Start accepts. Automaton has 437 states and 438 transitions. Word has length 419 [2020-09-24 18:31:47,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 18:31:47,448 INFO L479 AbstractCegarLoop]: Abstraction has 437 states and 438 transitions. [2020-09-24 18:31:47,448 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-24 18:31:47,448 INFO L276 IsEmpty]: Start isEmpty. Operand 437 states and 438 transitions. [2020-09-24 18:31:47,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 437 [2020-09-24 18:31:47,451 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 18:31:47,451 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 18:31:47,451 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-24 18:31:47,452 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 18:31:47,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 18:31:47,452 INFO L82 PathProgramCache]: Analyzing trace with hash 1837327485, now seen corresponding path program 7 times [2020-09-24 18:31:47,452 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 18:31:47,452 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [50650253] [2020-09-24 18:31:47,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 18:31:47,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:31:47,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:31:48,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking...