/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SHALLOWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/array-crafted/zero_sum3.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-26 19:06:07,562 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-26 19:06:07,565 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-26 19:06:07,601 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-26 19:06:07,602 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-26 19:06:07,604 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-26 19:06:07,605 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-26 19:06:07,608 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-26 19:06:07,628 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-26 19:06:07,629 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-26 19:06:07,631 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-26 19:06:07,633 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-26 19:06:07,634 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-26 19:06:07,636 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-26 19:06:07,640 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-26 19:06:07,642 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-26 19:06:07,643 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-26 19:06:07,644 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-26 19:06:07,650 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-26 19:06:07,656 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-26 19:06:07,660 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-26 19:06:07,661 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-26 19:06:07,663 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-26 19:06:07,665 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-26 19:06:07,670 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-26 19:06:07,670 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-26 19:06:07,671 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-26 19:06:07,675 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-26 19:06:07,677 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-26 19:06:07,678 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-26 19:06:07,678 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-26 19:06:07,679 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-26 19:06:07,681 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-26 19:06:07,682 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-26 19:06:07,683 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-26 19:06:07,683 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-26 19:06:07,684 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-26 19:06:07,684 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-26 19:06:07,684 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-26 19:06:07,685 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-26 19:06:07,686 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-26 19:06:07,687 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-26 19:06:07,746 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-26 19:06:07,747 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-26 19:06:07,752 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-26 19:06:07,752 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-26 19:06:07,752 INFO L138 SettingsManager]: * Use SBE=true [2020-10-26 19:06:07,753 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-26 19:06:07,753 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-26 19:06:07,754 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-26 19:06:07,754 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-26 19:06:07,754 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-26 19:06:07,755 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-26 19:06:07,755 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-26 19:06:07,756 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-26 19:06:07,756 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-26 19:06:07,756 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-26 19:06:07,756 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-26 19:06:07,756 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-26 19:06:07,757 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-26 19:06:07,757 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-26 19:06:07,757 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-26 19:06:07,757 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-26 19:06:07,758 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 19:06:07,758 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-26 19:06:07,759 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-26 19:06:07,759 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-26 19:06:07,760 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-26 19:06:07,760 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-26 19:06:07,760 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-26 19:06:07,760 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-26 19:06:07,760 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-26 19:06:08,144 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-26 19:06:08,194 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-26 19:06:08,198 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-26 19:06:08,199 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-26 19:06:08,200 INFO L275 PluginConnector]: CDTParser initialized [2020-10-26 19:06:08,201 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-crafted/zero_sum3.c [2020-10-26 19:06:08,282 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/128360106/b6706e2529cd4684b0d1c26cab2cf288/FLAG7454ab02b [2020-10-26 19:06:08,859 INFO L306 CDTParser]: Found 1 translation units. [2020-10-26 19:06:08,860 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-crafted/zero_sum3.c [2020-10-26 19:06:08,869 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/128360106/b6706e2529cd4684b0d1c26cab2cf288/FLAG7454ab02b [2020-10-26 19:06:09,229 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/128360106/b6706e2529cd4684b0d1c26cab2cf288 [2020-10-26 19:06:09,232 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-26 19:06:09,239 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-26 19:06:09,245 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-26 19:06:09,245 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-26 19:06:09,249 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-26 19:06:09,249 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 07:06:09" (1/1) ... [2020-10-26 19:06:09,253 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@10a99e30 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:06:09, skipping insertion in model container [2020-10-26 19:06:09,254 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 07:06:09" (1/1) ... [2020-10-26 19:06:09,262 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-26 19:06:09,278 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-26 19:06:09,443 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 19:06:09,453 INFO L203 MainTranslator]: Completed pre-run [2020-10-26 19:06:09,478 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 19:06:09,495 INFO L208 MainTranslator]: Completed translation [2020-10-26 19:06:09,496 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:06:09 WrapperNode [2020-10-26 19:06:09,496 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-26 19:06:09,497 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-26 19:06:09,497 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-26 19:06:09,497 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-26 19:06:09,510 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:06:09" (1/1) ... [2020-10-26 19:06:09,511 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:06:09" (1/1) ... [2020-10-26 19:06:09,519 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:06:09" (1/1) ... [2020-10-26 19:06:09,520 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:06:09" (1/1) ... [2020-10-26 19:06:09,528 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:06:09" (1/1) ... [2020-10-26 19:06:09,541 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:06:09" (1/1) ... [2020-10-26 19:06:09,543 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:06:09" (1/1) ... [2020-10-26 19:06:09,550 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-26 19:06:09,551 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-26 19:06:09,551 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-26 19:06:09,551 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-26 19:06:09,552 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:06:09" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 19:06:09,645 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-26 19:06:09,645 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-26 19:06:09,646 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-26 19:06:09,646 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-26 19:06:09,646 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-26 19:06:09,647 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-26 19:06:09,648 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-26 19:06:09,648 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-26 19:06:09,648 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-26 19:06:09,648 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-26 19:06:09,650 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-26 19:06:09,650 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-26 19:06:09,650 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_short [2020-10-26 19:06:09,651 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-26 19:06:09,651 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-26 19:06:09,652 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-26 19:06:09,652 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-26 19:06:09,652 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-26 19:06:09,653 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-26 19:06:09,653 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-26 19:06:10,346 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-26 19:06:10,346 INFO L298 CfgBuilder]: Removed 7 assume(true) statements. [2020-10-26 19:06:10,348 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 07:06:10 BoogieIcfgContainer [2020-10-26 19:06:10,348 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-26 19:06:10,352 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-26 19:06:10,352 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-26 19:06:10,355 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-26 19:06:10,356 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 07:06:09" (1/3) ... [2020-10-26 19:06:10,357 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@438d5c96 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 07:06:10, skipping insertion in model container [2020-10-26 19:06:10,357 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:06:09" (2/3) ... [2020-10-26 19:06:10,358 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@438d5c96 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 07:06:10, skipping insertion in model container [2020-10-26 19:06:10,358 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 07:06:10" (3/3) ... [2020-10-26 19:06:10,360 INFO L111 eAbstractionObserver]: Analyzing ICFG zero_sum3.c [2020-10-26 19:06:10,374 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-26 19:06:10,380 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-26 19:06:10,395 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-26 19:06:10,436 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-26 19:06:10,436 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-26 19:06:10,437 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-26 19:06:10,437 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-26 19:06:10,437 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-26 19:06:10,437 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-26 19:06:10,437 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-26 19:06:10,437 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-26 19:06:10,462 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-10-26 19:06:10,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-26 19:06:10,472 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:06:10,473 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] [2020-10-26 19:06:10,473 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:06:10,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:06:10,482 INFO L82 PathProgramCache]: Analyzing trace with hash 924121920, now seen corresponding path program 1 times [2020-10-26 19:06:10,491 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:06:10,492 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [805308472] [2020-10-26 19:06:10,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:06:10,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:06:10,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:10,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:10,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:10,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:10,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:10,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:10,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:11,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:12,321 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:06:12,322 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-26 19:06:12,322 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-26 19:06:12,322 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1698 [2020-10-26 19:06:12,325 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:06:12,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:06:12,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:06:12,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 19:06:12,326 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-26 19:06:12,465 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:06:12,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:06:12,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:12,488 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:06:12,488 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:06:12,489 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:06:12,489 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-26 19:06:12,489 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:06:12,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:06:12,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:06:12,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:06:12,490 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:06:12,504 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:06:12,505 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [805308472] [2020-10-26 19:06:12,507 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 19:06:12,508 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-26 19:06:12,509 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203327389] [2020-10-26 19:06:12,514 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-26 19:06:12,515 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:06:12,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-26 19:06:12,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 19:06:12,537 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 4 states. [2020-10-26 19:06:12,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:06:12,705 INFO L93 Difference]: Finished difference Result 78 states and 109 transitions. [2020-10-26 19:06:12,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-26 19:06:12,707 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2020-10-26 19:06:12,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:06:12,715 INFO L225 Difference]: With dead ends: 78 [2020-10-26 19:06:12,715 INFO L226 Difference]: Without dead ends: 35 [2020-10-26 19:06:12,718 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 19:06:12,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-10-26 19:06:12,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2020-10-26 19:06:12,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-26 19:06:12,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 40 transitions. [2020-10-26 19:06:12,762 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 40 transitions. Word has length 25 [2020-10-26 19:06:12,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:06:12,762 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 40 transitions. [2020-10-26 19:06:12,762 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-26 19:06:12,763 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 40 transitions. [2020-10-26 19:06:12,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-26 19:06:12,764 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:06:12,764 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] [2020-10-26 19:06:12,764 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-26 19:06:12,765 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:06:12,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:06:12,765 INFO L82 PathProgramCache]: Analyzing trace with hash -545905132, now seen corresponding path program 1 times [2020-10-26 19:06:12,766 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:06:12,766 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [810543805] [2020-10-26 19:06:12,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:06:12,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:06:12,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:12,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:12,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:12,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:12,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:12,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:12,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:14,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:17,784 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:06:17,785 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-26 19:06:17,788 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-26 19:06:17,789 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-26 19:06:17,789 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:06:17,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-26 19:06:17,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:06:17,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-26 19:06:17,791 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:06:17,877 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:06:17,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:06:17,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:17,888 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:06:17,896 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:06:17,896 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:06:17,896 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:06:17,896 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:06:17,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:06:17,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:06:17,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:06:17,897 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:06:17,905 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-26 19:06:17,906 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [810543805] [2020-10-26 19:06:17,906 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 19:06:17,906 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-26 19:06:17,906 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790443810] [2020-10-26 19:06:17,908 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-26 19:06:17,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:06:17,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-26 19:06:17,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-26 19:06:17,920 INFO L87 Difference]: Start difference. First operand 34 states and 40 transitions. Second operand 5 states. [2020-10-26 19:06:18,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:06:18,296 INFO L93 Difference]: Finished difference Result 67 states and 83 transitions. [2020-10-26 19:06:18,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-26 19:06:18,297 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 27 [2020-10-26 19:06:18,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:06:18,300 INFO L225 Difference]: With dead ends: 67 [2020-10-26 19:06:18,300 INFO L226 Difference]: Without dead ends: 46 [2020-10-26 19:06:18,303 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-26 19:06:18,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-26 19:06:18,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 40. [2020-10-26 19:06:18,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-26 19:06:18,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 46 transitions. [2020-10-26 19:06:18,325 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 46 transitions. Word has length 27 [2020-10-26 19:06:18,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:06:18,327 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 46 transitions. [2020-10-26 19:06:18,327 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-26 19:06:18,327 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 46 transitions. [2020-10-26 19:06:18,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-26 19:06:18,329 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:06:18,329 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] [2020-10-26 19:06:18,329 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-26 19:06:18,329 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:06:18,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:06:18,330 INFO L82 PathProgramCache]: Analyzing trace with hash 156019424, now seen corresponding path program 1 times [2020-10-26 19:06:18,331 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:06:18,331 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [6374236] [2020-10-26 19:06:18,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:06:18,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:06:18,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:18,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:18,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:18,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:18,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:18,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:19,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:23,357 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:06:23,357 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-26 19:06:23,357 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-26 19:06:23,357 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-26 19:06:23,358 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:06:23,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 19:06:23,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:06:23,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-26 19:06:23,358 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:06:23,444 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:06:23,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:06:23,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:23,454 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:06:23,454 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:06:23,455 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:06:23,455 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 19:06:23,455 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:06:23,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:06:23,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:06:23,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:06:23,456 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:06:23,465 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-26 19:06:23,465 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [6374236] [2020-10-26 19:06:23,465 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:06:23,466 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-26 19:06:23,466 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096002085] [2020-10-26 19:06:23,467 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-26 19:06:23,467 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:06:23,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-26 19:06:23,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-26 19:06:23,471 INFO L87 Difference]: Start difference. First operand 40 states and 46 transitions. Second operand 6 states. [2020-10-26 19:06:23,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:06:23,754 INFO L93 Difference]: Finished difference Result 78 states and 94 transitions. [2020-10-26 19:06:23,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-26 19:06:23,754 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 39 [2020-10-26 19:06:23,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:06:23,755 INFO L225 Difference]: With dead ends: 78 [2020-10-26 19:06:23,756 INFO L226 Difference]: Without dead ends: 52 [2020-10-26 19:06:23,756 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-10-26 19:06:23,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-26 19:06:23,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2020-10-26 19:06:23,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-26 19:06:23,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 58 transitions. [2020-10-26 19:06:23,766 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 58 transitions. Word has length 39 [2020-10-26 19:06:23,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:06:23,766 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 58 transitions. [2020-10-26 19:06:23,766 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-26 19:06:23,767 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 58 transitions. [2020-10-26 19:06:23,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-26 19:06:23,768 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:06:23,768 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:06:23,769 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-26 19:06:23,769 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:06:23,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:06:23,771 INFO L82 PathProgramCache]: Analyzing trace with hash 973835692, now seen corresponding path program 2 times [2020-10-26 19:06:23,771 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:06:23,772 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1347958699] [2020-10-26 19:06:23,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:06:23,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:06:23,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:23,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:24,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:24,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:26,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:27,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:28,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:28,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:28,816 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:06:28,816 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-26 19:06:28,816 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-26 19:06:28,817 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-26 19:06:28,817 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:06:28,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-26 19:06:28,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:06:28,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-26 19:06:28,819 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:06:29,440 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:06:29,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:06:29,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:29,448 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:06:29,448 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:06:29,448 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:06:29,448 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:06:29,449 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:06:29,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:06:29,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:06:29,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:06:29,449 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:06:29,468 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-26 19:06:29,469 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1347958699] [2020-10-26 19:06:29,469 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:06:29,469 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-26 19:06:29,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153854775] [2020-10-26 19:06:29,470 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-26 19:06:29,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:06:29,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-26 19:06:29,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2020-10-26 19:06:29,471 INFO L87 Difference]: Start difference. First operand 52 states and 58 transitions. Second operand 16 states. [2020-10-26 19:06:30,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:06:30,062 INFO L93 Difference]: Finished difference Result 90 states and 101 transitions. [2020-10-26 19:06:30,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-26 19:06:30,062 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 51 [2020-10-26 19:06:30,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:06:30,064 INFO L225 Difference]: With dead ends: 90 [2020-10-26 19:06:30,064 INFO L226 Difference]: Without dead ends: 84 [2020-10-26 19:06:30,065 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 7 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2020-10-26 19:06:30,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-26 19:06:30,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 81. [2020-10-26 19:06:30,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-26 19:06:30,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 92 transitions. [2020-10-26 19:06:30,078 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 92 transitions. Word has length 51 [2020-10-26 19:06:30,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:06:30,079 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 92 transitions. [2020-10-26 19:06:30,079 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-26 19:06:30,079 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 92 transitions. [2020-10-26 19:06:30,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-26 19:06:30,081 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:06:30,081 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:06:30,081 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-26 19:06:30,082 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:06:30,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:06:30,082 INFO L82 PathProgramCache]: Analyzing trace with hash 847967982, now seen corresponding path program 3 times [2020-10-26 19:06:30,083 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:06:30,083 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1885169661] [2020-10-26 19:06:30,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:06:30,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:06:30,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:30,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:30,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:30,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:30,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:35,103 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:06:35,103 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-26 19:06:35,103 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:06:35,103 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-26 19:06:35,104 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:06:35,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-26 19:06:35,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:06:35,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-26 19:06:35,105 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:06:35,168 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:06:35,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:06:35,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:35,177 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:06:35,177 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:06:35,177 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:06:35,177 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:06:35,178 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:06:35,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:06:35,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:06:35,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:06:35,178 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:06:35,185 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2020-10-26 19:06:35,185 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1885169661] [2020-10-26 19:06:35,185 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:06:35,186 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-26 19:06:35,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577291094] [2020-10-26 19:06:35,187 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-26 19:06:35,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:06:35,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-26 19:06:35,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-26 19:06:35,189 INFO L87 Difference]: Start difference. First operand 81 states and 92 transitions. Second operand 5 states. [2020-10-26 19:06:35,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:06:35,318 INFO L93 Difference]: Finished difference Result 154 states and 176 transitions. [2020-10-26 19:06:35,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 19:06:35,318 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 53 [2020-10-26 19:06:35,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:06:35,320 INFO L225 Difference]: With dead ends: 154 [2020-10-26 19:06:35,320 INFO L226 Difference]: Without dead ends: 83 [2020-10-26 19:06:35,321 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-26 19:06:35,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-26 19:06:35,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2020-10-26 19:06:35,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-26 19:06:35,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 94 transitions. [2020-10-26 19:06:35,342 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 94 transitions. Word has length 53 [2020-10-26 19:06:35,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:06:35,342 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 94 transitions. [2020-10-26 19:06:35,342 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-26 19:06:35,343 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 94 transitions. [2020-10-26 19:06:35,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-26 19:06:35,347 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:06:35,347 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:06:35,347 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-26 19:06:35,347 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:06:35,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:06:35,352 INFO L82 PathProgramCache]: Analyzing trace with hash -852427024, now seen corresponding path program 4 times [2020-10-26 19:06:35,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:06:35,352 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1398309624] [2020-10-26 19:06:35,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:06:35,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:06:35,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:35,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:35,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:35,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:35,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:38,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:40,385 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:06:40,385 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-26 19:06:40,386 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-26 19:06:40,386 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-26 19:06:40,386 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:06:40,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 19:06:40,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:06:40,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-26 19:06:40,387 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:06:40,514 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:06:40,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:06:40,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:40,522 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:06:40,523 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:06:40,523 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:06:40,523 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 19:06:40,523 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:06:40,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:06:40,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:06:40,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:06:40,524 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:06:40,535 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-10-26 19:06:40,535 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1398309624] [2020-10-26 19:06:40,537 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:06:40,537 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-26 19:06:40,537 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323875611] [2020-10-26 19:06:40,538 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-26 19:06:40,538 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:06:40,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-26 19:06:40,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-10-26 19:06:40,539 INFO L87 Difference]: Start difference. First operand 83 states and 94 transitions. Second operand 10 states. [2020-10-26 19:06:40,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:06:40,934 INFO L93 Difference]: Finished difference Result 160 states and 182 transitions. [2020-10-26 19:06:40,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-26 19:06:40,934 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 55 [2020-10-26 19:06:40,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:06:40,935 INFO L225 Difference]: With dead ends: 160 [2020-10-26 19:06:40,935 INFO L226 Difference]: Without dead ends: 86 [2020-10-26 19:06:40,936 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2020-10-26 19:06:40,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-26 19:06:40,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2020-10-26 19:06:40,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-26 19:06:40,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 96 transitions. [2020-10-26 19:06:40,949 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 96 transitions. Word has length 55 [2020-10-26 19:06:40,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:06:40,950 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 96 transitions. [2020-10-26 19:06:40,950 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-26 19:06:40,950 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 96 transitions. [2020-10-26 19:06:40,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-26 19:06:40,954 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:06:40,954 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:06:40,954 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-26 19:06:40,954 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:06:40,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:06:40,955 INFO L82 PathProgramCache]: Analyzing trace with hash 1450511986, now seen corresponding path program 5 times [2020-10-26 19:06:40,955 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:06:40,955 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2040819862] [2020-10-26 19:06:40,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:06:40,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:06:40,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:40,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:41,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:41,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:41,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:41,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:41,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:45,977 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:06:45,977 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-26 19:06:45,978 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-26 19:06:45,978 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-26 19:06:45,978 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:06:45,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 19:06:45,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:06:45,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-26 19:06:45,979 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:06:46,109 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:06:46,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:06:46,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:46,117 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:06:46,118 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:06:46,118 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:06:46,118 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 19:06:46,118 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:06:46,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:06:46,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:06:46,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:06:46,119 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:06:46,127 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-10-26 19:06:46,128 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2040819862] [2020-10-26 19:06:46,128 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:06:46,128 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-26 19:06:46,128 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346575416] [2020-10-26 19:06:46,130 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-26 19:06:46,130 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:06:46,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-26 19:06:46,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-26 19:06:46,132 INFO L87 Difference]: Start difference. First operand 85 states and 96 transitions. Second operand 10 states. [2020-10-26 19:06:46,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:06:46,475 INFO L93 Difference]: Finished difference Result 127 states and 147 transitions. [2020-10-26 19:06:46,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 19:06:46,476 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 57 [2020-10-26 19:06:46,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:06:46,477 INFO L225 Difference]: With dead ends: 127 [2020-10-26 19:06:46,478 INFO L226 Difference]: Without dead ends: 68 [2020-10-26 19:06:46,479 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-10-26 19:06:46,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-26 19:06:46,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2020-10-26 19:06:46,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-26 19:06:46,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 74 transitions. [2020-10-26 19:06:46,487 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 74 transitions. Word has length 57 [2020-10-26 19:06:46,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:06:46,488 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 74 transitions. [2020-10-26 19:06:46,488 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-26 19:06:46,488 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 74 transitions. [2020-10-26 19:06:46,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-26 19:06:46,489 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:06:46,489 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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] [2020-10-26 19:06:46,489 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-26 19:06:46,489 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:06:46,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:06:46,490 INFO L82 PathProgramCache]: Analyzing trace with hash 316100860, now seen corresponding path program 6 times [2020-10-26 19:06:46,490 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:06:46,490 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1288793257] [2020-10-26 19:06:46,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:06:46,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:06:46,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:47,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:47,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:49,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:51,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:51,536 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:06:51,536 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-26 19:06:51,536 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:06:51,536 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-26 19:06:51,537 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:06:51,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 45 [2020-10-26 19:06:51,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:06:51,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-26 19:06:51,537 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:06:54,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:06:54,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:06:54,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:54,351 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:06:54,351 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:06:54,351 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:06:54,351 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:06:54,351 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:06:54,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:06:54,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:06:54,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:06:54,352 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:06:54,402 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 2 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:06:54,403 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1288793257] [2020-10-26 19:06:54,403 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:06:54,403 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2020-10-26 19:06:54,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529829018] [2020-10-26 19:06:54,404 INFO L461 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-10-26 19:06:54,404 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:06:54,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-10-26 19:06:54,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=1882, Unknown=0, NotChecked=0, Total=2070 [2020-10-26 19:06:54,407 INFO L87 Difference]: Start difference. First operand 68 states and 74 transitions. Second operand 46 states. [2020-10-26 19:06:55,293 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 46 [2020-10-26 19:06:57,475 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 49 [2020-10-26 19:06:59,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:06:59,571 INFO L93 Difference]: Finished difference Result 159 states and 177 transitions. [2020-10-26 19:06:59,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-10-26 19:06:59,572 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 67 [2020-10-26 19:06:59,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:06:59,575 INFO L225 Difference]: With dead ends: 159 [2020-10-26 19:06:59,575 INFO L226 Difference]: Without dead ends: 153 [2020-10-26 19:06:59,578 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1287 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=501, Invalid=5351, Unknown=0, NotChecked=0, Total=5852 [2020-10-26 19:06:59,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-10-26 19:06:59,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 139. [2020-10-26 19:06:59,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-10-26 19:06:59,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 155 transitions. [2020-10-26 19:06:59,597 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 155 transitions. Word has length 67 [2020-10-26 19:06:59,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:06:59,598 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 155 transitions. [2020-10-26 19:06:59,598 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-10-26 19:06:59,598 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 155 transitions. [2020-10-26 19:06:59,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-26 19:06:59,599 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:06:59,599 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 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] [2020-10-26 19:06:59,600 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-26 19:06:59,600 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:06:59,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:06:59,600 INFO L82 PathProgramCache]: Analyzing trace with hash -1098807746, now seen corresponding path program 7 times [2020-10-26 19:06:59,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:06:59,601 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1766472335] [2020-10-26 19:06:59,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:06:59,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:06:59,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:59,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:59,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:59,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:07:00,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:07:04,623 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:07:04,623 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-26 19:07:04,624 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:07:04,624 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-26 19:07:04,624 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:07:04,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-26 19:07:04,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:07:04,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-26 19:07:04,624 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:07:04,766 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:07:04,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:07:04,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:07:04,788 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:07:04,792 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:07:04,793 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:07:04,793 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-26 19:07:04,793 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:07:04,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:07:04,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:07:04,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:07:04,794 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:07:04,803 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-10-26 19:07:04,804 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1766472335] [2020-10-26 19:07:04,809 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:07:04,810 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-26 19:07:04,810 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351678078] [2020-10-26 19:07:04,811 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-26 19:07:04,812 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:07:04,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-26 19:07:04,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-26 19:07:04,813 INFO L87 Difference]: Start difference. First operand 139 states and 155 transitions. Second operand 12 states. [2020-10-26 19:07:05,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:07:05,327 INFO L93 Difference]: Finished difference Result 233 states and 259 transitions. [2020-10-26 19:07:05,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-26 19:07:05,327 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 69 [2020-10-26 19:07:05,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:07:05,329 INFO L225 Difference]: With dead ends: 233 [2020-10-26 19:07:05,329 INFO L226 Difference]: Without dead ends: 108 [2020-10-26 19:07:05,331 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2020-10-26 19:07:05,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-10-26 19:07:05,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 107. [2020-10-26 19:07:05,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-10-26 19:07:05,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 118 transitions. [2020-10-26 19:07:05,348 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 118 transitions. Word has length 69 [2020-10-26 19:07:05,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:07:05,348 INFO L481 AbstractCegarLoop]: Abstraction has 107 states and 118 transitions. [2020-10-26 19:07:05,348 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-26 19:07:05,349 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 118 transitions. [2020-10-26 19:07:05,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-26 19:07:05,350 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:07:05,350 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 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] [2020-10-26 19:07:05,350 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-26 19:07:05,350 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:07:05,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:07:05,351 INFO L82 PathProgramCache]: Analyzing trace with hash 1030441536, now seen corresponding path program 8 times [2020-10-26 19:07:05,351 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:07:05,351 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2133144143] [2020-10-26 19:07:05,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:07:05,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:07:05,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:07:05,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:07:05,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:07:05,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:07:06,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:07:06,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:07:06,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:07:10,378 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:07:10,378 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-26 19:07:10,378 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-26 19:07:10,378 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-26 19:07:10,379 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:07:10,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-26 19:07:10,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:07:10,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-26 19:07:10,379 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:07:10,502 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:07:10,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:07:10,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:07:10,507 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:07:10,507 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:07:10,507 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:07:10,508 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:07:10,508 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:07:10,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:07:10,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:07:10,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:07:10,510 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:07:10,521 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2020-10-26 19:07:10,521 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2133144143] [2020-10-26 19:07:10,521 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:07:10,521 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-26 19:07:10,522 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015445172] [2020-10-26 19:07:10,522 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-26 19:07:10,522 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:07:10,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-26 19:07:10,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-26 19:07:10,523 INFO L87 Difference]: Start difference. First operand 107 states and 118 transitions. Second operand 12 states. [2020-10-26 19:07:11,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:07:11,106 INFO L93 Difference]: Finished difference Result 157 states and 177 transitions. [2020-10-26 19:07:11,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-26 19:07:11,107 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 71 [2020-10-26 19:07:11,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:07:11,108 INFO L225 Difference]: With dead ends: 157 [2020-10-26 19:07:11,108 INFO L226 Difference]: Without dead ends: 82 [2020-10-26 19:07:11,109 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=92, Invalid=214, Unknown=0, NotChecked=0, Total=306 [2020-10-26 19:07:11,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-26 19:07:11,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2020-10-26 19:07:11,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-26 19:07:11,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 88 transitions. [2020-10-26 19:07:11,122 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 88 transitions. Word has length 71 [2020-10-26 19:07:11,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:07:11,122 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 88 transitions. [2020-10-26 19:07:11,123 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-26 19:07:11,123 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 88 transitions. [2020-10-26 19:07:11,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-26 19:07:11,124 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:07:11,124 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 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] [2020-10-26 19:07:11,124 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-26 19:07:11,124 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:07:11,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:07:11,125 INFO L82 PathProgramCache]: Analyzing trace with hash -1932627126, now seen corresponding path program 9 times [2020-10-26 19:07:11,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:07:11,125 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1438109314] [2020-10-26 19:07:11,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:07:11,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:07:11,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:07:12,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:07:13,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:07:15,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:07:16,212 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:07:16,212 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-26 19:07:16,212 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:07:16,213 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-26 19:07:16,213 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:07:16,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 59 [2020-10-26 19:07:16,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:07:16,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-10-26 19:07:16,213 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:07:19,090 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 32 [2020-10-26 19:07:19,852 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 33 [2020-10-26 19:07:20,831 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 42 [2020-10-26 19:07:22,981 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:07:22,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:07:22,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:07:22,992 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:07:22,992 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:07:22,992 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:07:22,992 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:07:22,992 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:07:22,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:07:22,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:07:22,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:07:22,993 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:07:23,053 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 15 proven. 97 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:07:23,054 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1438109314] [2020-10-26 19:07:23,054 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:07:23,054 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58] total 58 [2020-10-26 19:07:23,054 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096928464] [2020-10-26 19:07:23,055 INFO L461 AbstractCegarLoop]: Interpolant automaton has 58 states [2020-10-26 19:07:23,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:07:23,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2020-10-26 19:07:23,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=421, Invalid=2885, Unknown=0, NotChecked=0, Total=3306 [2020-10-26 19:07:23,058 INFO L87 Difference]: Start difference. First operand 82 states and 88 transitions. Second operand 58 states. [2020-10-26 19:07:23,499 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 36 [2020-10-26 19:07:24,485 WARN L193 SmtUtils]: Spent 350.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 83 [2020-10-26 19:07:25,039 WARN L193 SmtUtils]: Spent 365.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 84 [2020-10-26 19:07:25,479 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 73 [2020-10-26 19:07:26,031 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 58 [2020-10-26 19:07:26,522 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 51 [2020-10-26 19:07:26,799 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 47 [2020-10-26 19:07:27,232 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 51 [2020-10-26 19:07:27,983 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 51 [2020-10-26 19:07:28,479 WARN L193 SmtUtils]: Spent 354.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 85 [2020-10-26 19:07:29,512 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 42 [2020-10-26 19:07:30,018 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 53 [2020-10-26 19:07:30,292 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 48 [2020-10-26 19:07:30,577 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 39 [2020-10-26 19:07:30,883 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 46 [2020-10-26 19:07:34,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:07:34,193 INFO L93 Difference]: Finished difference Result 177 states and 195 transitions. [2020-10-26 19:07:34,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-10-26 19:07:34,194 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 81 [2020-10-26 19:07:34,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:07:34,196 INFO L225 Difference]: With dead ends: 177 [2020-10-26 19:07:34,196 INFO L226 Difference]: Without dead ends: 88 [2020-10-26 19:07:34,201 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 3 SyntacticMatches, 3 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1765 ImplicationChecksByTransitivity, 12.7s TimeCoverageRelationStatistics Valid=1234, Invalid=6776, Unknown=0, NotChecked=0, Total=8010 [2020-10-26 19:07:34,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-26 19:07:34,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 84. [2020-10-26 19:07:34,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-26 19:07:34,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 90 transitions. [2020-10-26 19:07:34,214 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 90 transitions. Word has length 81 [2020-10-26 19:07:34,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:07:34,214 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 90 transitions. [2020-10-26 19:07:34,214 INFO L482 AbstractCegarLoop]: Interpolant automaton has 58 states. [2020-10-26 19:07:34,214 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 90 transitions. [2020-10-26 19:07:34,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-26 19:07:34,215 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:07:34,215 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 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] [2020-10-26 19:07:34,216 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-26 19:07:34,216 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:07:34,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:07:34,216 INFO L82 PathProgramCache]: Analyzing trace with hash 607667276, now seen corresponding path program 10 times [2020-10-26 19:07:34,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:07:34,217 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1524330438] [2020-10-26 19:07:34,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:07:34,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:07:34,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:07:34,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:07:34,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:07:34,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:07:35,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:07:39,236 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:07:39,236 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-10-26 19:07:39,236 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:07:39,236 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-26 19:07:39,236 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:07:39,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-26 19:07:39,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:07:39,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-26 19:07:39,237 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:07:39,412 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:07:39,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:07:39,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:07:39,417 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:07:39,417 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:07:39,417 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:07:39,418 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:07:39,418 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:07:39,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:07:39,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:07:39,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:07:39,418 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:07:39,428 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2020-10-26 19:07:39,429 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1524330438] [2020-10-26 19:07:39,429 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:07:39,429 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-26 19:07:39,429 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484461120] [2020-10-26 19:07:39,430 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-26 19:07:39,430 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:07:39,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-26 19:07:39,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2020-10-26 19:07:39,431 INFO L87 Difference]: Start difference. First operand 84 states and 90 transitions. Second operand 14 states. [2020-10-26 19:07:40,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:07:40,088 INFO L93 Difference]: Finished difference Result 152 states and 168 transitions. [2020-10-26 19:07:40,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-26 19:07:40,089 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 83 [2020-10-26 19:07:40,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:07:40,091 INFO L225 Difference]: With dead ends: 152 [2020-10-26 19:07:40,091 INFO L226 Difference]: Without dead ends: 96 [2020-10-26 19:07:40,092 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=128, Invalid=292, Unknown=0, NotChecked=0, Total=420 [2020-10-26 19:07:40,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-26 19:07:40,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2020-10-26 19:07:40,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-10-26 19:07:40,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 102 transitions. [2020-10-26 19:07:40,105 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 102 transitions. Word has length 83 [2020-10-26 19:07:40,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:07:40,105 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 102 transitions. [2020-10-26 19:07:40,105 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-26 19:07:40,105 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 102 transitions. [2020-10-26 19:07:40,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-10-26 19:07:40,106 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:07:40,106 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 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] [2020-10-26 19:07:40,106 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-26 19:07:40,107 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:07:40,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:07:40,107 INFO L82 PathProgramCache]: Analyzing trace with hash -1690831592, now seen corresponding path program 11 times [2020-10-26 19:07:40,107 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:07:40,107 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [681444554] [2020-10-26 19:07:40,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:07:40,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:07:40,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:07:41,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:07:43,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:07:45,222 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:07:45,222 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 105 [2020-10-26 19:07:45,222 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:07:45,223 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5059 [2020-10-26 19:07:45,223 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:07:45,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 66 [2020-10-26 19:07:45,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:07:45,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 89 [2020-10-26 19:07:45,223 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:07:49,331 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:07:49,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:07:49,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:07:49,338 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:07:49,338 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:07:49,339 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:07:49,339 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:07:49,339 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:07:49,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:07:49,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:07:49,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:07:49,340 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:07:49,392 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 0 proven. 150 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-10-26 19:07:49,392 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [681444554] [2020-10-26 19:07:49,392 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:07:49,392 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50] total 50 [2020-10-26 19:07:49,393 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705750686] [2020-10-26 19:07:49,393 INFO L461 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-10-26 19:07:49,393 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:07:49,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-10-26 19:07:49,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=2324, Unknown=0, NotChecked=0, Total=2450 [2020-10-26 19:07:49,395 INFO L87 Difference]: Start difference. First operand 96 states and 102 transitions. Second operand 50 states. [2020-10-26 19:07:50,794 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 55 [2020-10-26 19:07:54,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:07:54,716 INFO L93 Difference]: Finished difference Result 164 states and 175 transitions. [2020-10-26 19:07:54,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-26 19:07:54,717 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 95 [2020-10-26 19:07:54,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:07:54,719 INFO L225 Difference]: With dead ends: 164 [2020-10-26 19:07:54,719 INFO L226 Difference]: Without dead ends: 158 [2020-10-26 19:07:54,722 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 6 SyntacticMatches, 15 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 896 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=263, Invalid=4707, Unknown=0, NotChecked=0, Total=4970 [2020-10-26 19:07:54,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2020-10-26 19:07:54,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 149. [2020-10-26 19:07:54,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2020-10-26 19:07:54,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 160 transitions. [2020-10-26 19:07:54,741 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 160 transitions. Word has length 95 [2020-10-26 19:07:54,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:07:54,742 INFO L481 AbstractCegarLoop]: Abstraction has 149 states and 160 transitions. [2020-10-26 19:07:54,742 INFO L482 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-10-26 19:07:54,742 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 160 transitions. [2020-10-26 19:07:54,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-10-26 19:07:54,743 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:07:54,743 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 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] [2020-10-26 19:07:54,743 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-26 19:07:54,744 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:07:54,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:07:54,744 INFO L82 PathProgramCache]: Analyzing trace with hash 12473178, now seen corresponding path program 12 times [2020-10-26 19:07:54,744 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:07:54,745 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2028980732] [2020-10-26 19:07:54,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:07:54,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:07:54,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:07:54,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:07:54,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:07:54,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:07:56,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:07:59,768 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:07:59,769 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 107 [2020-10-26 19:07:59,769 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:07:59,769 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-26 19:07:59,769 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:07:59,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-26 19:07:59,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:07:59,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-26 19:07:59,769 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:07:59,985 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:07:59,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:07:59,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:07:59,990 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:07:59,991 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:07:59,991 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:07:59,991 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:07:59,991 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:07:59,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:07:59,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:07:59,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:07:59,992 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:08:00,015 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 125 trivial. 0 not checked. [2020-10-26 19:08:00,015 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2028980732] [2020-10-26 19:08:00,015 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:08:00,015 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-26 19:08:00,016 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570652120] [2020-10-26 19:08:00,016 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-26 19:08:00,016 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:08:00,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-26 19:08:00,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2020-10-26 19:08:00,017 INFO L87 Difference]: Start difference. First operand 149 states and 160 transitions. Second operand 16 states. [2020-10-26 19:08:01,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:08:01,002 INFO L93 Difference]: Finished difference Result 292 states and 314 transitions. [2020-10-26 19:08:01,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-26 19:08:01,003 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 97 [2020-10-26 19:08:01,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:08:01,004 INFO L225 Difference]: With dead ends: 292 [2020-10-26 19:08:01,005 INFO L226 Difference]: Without dead ends: 152 [2020-10-26 19:08:01,006 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=133, Invalid=419, Unknown=0, NotChecked=0, Total=552 [2020-10-26 19:08:01,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-10-26 19:08:01,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 151. [2020-10-26 19:08:01,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2020-10-26 19:08:01,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 162 transitions. [2020-10-26 19:08:01,023 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 162 transitions. Word has length 97 [2020-10-26 19:08:01,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:08:01,024 INFO L481 AbstractCegarLoop]: Abstraction has 151 states and 162 transitions. [2020-10-26 19:08:01,024 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-26 19:08:01,024 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 162 transitions. [2020-10-26 19:08:01,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-10-26 19:08:01,025 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:08:01,025 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 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] [2020-10-26 19:08:01,025 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-26 19:08:01,025 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:08:01,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:08:01,026 INFO L82 PathProgramCache]: Analyzing trace with hash -172367780, now seen corresponding path program 13 times [2020-10-26 19:08:01,026 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:08:01,026 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [118306392] [2020-10-26 19:08:01,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:08:01,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:08:01,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:08:01,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:08:01,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:08:01,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:08:02,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:08:06,057 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:08:06,057 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 109 [2020-10-26 19:08:06,057 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:08:06,058 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-26 19:08:06,058 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:08:06,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-26 19:08:06,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:08:06,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-26 19:08:06,058 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:08:06,262 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:08:06,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:08:06,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:08:06,267 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:08:06,267 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:08:06,267 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:08:06,268 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:08:06,268 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:08:06,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:08:06,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:08:06,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:08:06,268 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:08:06,287 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2020-10-26 19:08:06,288 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [118306392] [2020-10-26 19:08:06,288 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:08:06,288 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-26 19:08:06,288 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272457746] [2020-10-26 19:08:06,289 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-26 19:08:06,289 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:08:06,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-26 19:08:06,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2020-10-26 19:08:06,290 INFO L87 Difference]: Start difference. First operand 151 states and 162 transitions. Second operand 16 states. [2020-10-26 19:08:07,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:08:07,065 INFO L93 Difference]: Finished difference Result 217 states and 237 transitions. [2020-10-26 19:08:07,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-26 19:08:07,066 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 99 [2020-10-26 19:08:07,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:08:07,067 INFO L225 Difference]: With dead ends: 217 [2020-10-26 19:08:07,067 INFO L226 Difference]: Without dead ends: 110 [2020-10-26 19:08:07,069 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=169, Invalid=383, Unknown=0, NotChecked=0, Total=552 [2020-10-26 19:08:07,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-10-26 19:08:07,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2020-10-26 19:08:07,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-26 19:08:07,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 116 transitions. [2020-10-26 19:08:07,083 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 116 transitions. Word has length 99 [2020-10-26 19:08:07,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:08:07,083 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 116 transitions. [2020-10-26 19:08:07,083 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-26 19:08:07,083 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 116 transitions. [2020-10-26 19:08:07,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-10-26 19:08:07,084 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:08:07,084 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 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] [2020-10-26 19:08:07,085 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-26 19:08:07,085 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:08:07,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:08:07,085 INFO L82 PathProgramCache]: Analyzing trace with hash 799454822, now seen corresponding path program 14 times [2020-10-26 19:08:07,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:08:07,086 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1301526107] [2020-10-26 19:08:07,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:08:07,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:08:07,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:08:08,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:08:11,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:08:13,559 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:08:13,559 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 119 [2020-10-26 19:08:13,559 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:08:13,560 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6398 [2020-10-26 19:08:13,560 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:08:13,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 78 [2020-10-26 19:08:13,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:08:13,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 103 [2020-10-26 19:08:13,560 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:08:16,191 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 50 [2020-10-26 19:08:22,126 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:08:22,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:08:22,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:08:22,135 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:08:22,135 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:08:22,136 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:08:22,136 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:08:22,136 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:08:22,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:08:22,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:08:22,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:08:22,137 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:08:22,241 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 216 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-26 19:08:22,241 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1301526107] [2020-10-26 19:08:22,242 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:08:22,242 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64] total 64 [2020-10-26 19:08:22,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502675866] [2020-10-26 19:08:22,242 INFO L461 AbstractCegarLoop]: Interpolant automaton has 64 states [2020-10-26 19:08:22,243 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:08:22,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2020-10-26 19:08:22,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=3865, Unknown=0, NotChecked=0, Total=4032 [2020-10-26 19:08:22,245 INFO L87 Difference]: Start difference. First operand 110 states and 116 transitions. Second operand 64 states. [2020-10-26 19:08:22,867 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 66 [2020-10-26 19:08:23,227 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 66 [2020-10-26 19:08:23,585 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 66 [2020-10-26 19:08:23,953 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 67 [2020-10-26 19:08:24,324 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 66 [2020-10-26 19:08:25,156 WARN L193 SmtUtils]: Spent 336.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 92 [2020-10-26 19:08:25,832 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 69 [2020-10-26 19:08:26,320 WARN L193 SmtUtils]: Spent 335.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 88 [2020-10-26 19:08:26,728 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 66 [2020-10-26 19:08:27,116 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 66 [2020-10-26 19:08:27,486 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 67 [2020-10-26 19:08:27,866 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 69 [2020-10-26 19:08:28,957 WARN L193 SmtUtils]: Spent 396.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 99 [2020-10-26 19:08:29,586 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 75 [2020-10-26 19:08:30,186 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 73 [2020-10-26 19:08:34,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:08:34,642 INFO L93 Difference]: Finished difference Result 194 states and 205 transitions. [2020-10-26 19:08:34,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-26 19:08:34,643 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 109 [2020-10-26 19:08:34,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:08:34,645 INFO L225 Difference]: With dead ends: 194 [2020-10-26 19:08:34,645 INFO L226 Difference]: Without dead ends: 188 [2020-10-26 19:08:34,648 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 4 SyntacticMatches, 15 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1300 ImplicationChecksByTransitivity, 13.9s TimeCoverageRelationStatistics Valid=344, Invalid=7312, Unknown=0, NotChecked=0, Total=7656 [2020-10-26 19:08:34,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2020-10-26 19:08:34,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 171. [2020-10-26 19:08:34,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2020-10-26 19:08:34,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 182 transitions. [2020-10-26 19:08:34,668 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 182 transitions. Word has length 109 [2020-10-26 19:08:34,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:08:34,668 INFO L481 AbstractCegarLoop]: Abstraction has 171 states and 182 transitions. [2020-10-26 19:08:34,668 INFO L482 AbstractCegarLoop]: Interpolant automaton has 64 states. [2020-10-26 19:08:34,668 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 182 transitions. [2020-10-26 19:08:34,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-10-26 19:08:34,670 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:08:34,670 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 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] [2020-10-26 19:08:34,670 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-26 19:08:34,670 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:08:34,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:08:34,671 INFO L82 PathProgramCache]: Analyzing trace with hash -1796712152, now seen corresponding path program 15 times [2020-10-26 19:08:34,671 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:08:34,671 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [292875399] [2020-10-26 19:08:34,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:08:34,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:08:34,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:08:34,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:08:34,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:08:34,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:08:36,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:08:39,701 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:08:39,701 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 121 [2020-10-26 19:08:39,701 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:08:39,701 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-26 19:08:39,701 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:08:39,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-26 19:08:39,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:08:39,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-26 19:08:39,701 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:08:39,991 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:08:39,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:08:39,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:08:39,997 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:08:39,998 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:08:39,998 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:08:39,998 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:08:39,998 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:08:39,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:08:39,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:08:39,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:08:39,999 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:08:40,010 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 49 proven. 36 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2020-10-26 19:08:40,011 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [292875399] [2020-10-26 19:08:40,011 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:08:40,011 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-26 19:08:40,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000143189] [2020-10-26 19:08:40,012 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-26 19:08:40,012 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:08:40,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-26 19:08:40,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2020-10-26 19:08:40,013 INFO L87 Difference]: Start difference. First operand 171 states and 182 transitions. Second operand 18 states. [2020-10-26 19:08:41,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:08:41,238 INFO L93 Difference]: Finished difference Result 336 states and 358 transitions. [2020-10-26 19:08:41,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-26 19:08:41,239 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 111 [2020-10-26 19:08:41,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:08:41,241 INFO L225 Difference]: With dead ends: 336 [2020-10-26 19:08:41,241 INFO L226 Difference]: Without dead ends: 174 [2020-10-26 19:08:41,242 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=167, Invalid=535, Unknown=0, NotChecked=0, Total=702 [2020-10-26 19:08:41,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2020-10-26 19:08:41,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 173. [2020-10-26 19:08:41,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2020-10-26 19:08:41,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 184 transitions. [2020-10-26 19:08:41,265 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 184 transitions. Word has length 111 [2020-10-26 19:08:41,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:08:41,265 INFO L481 AbstractCegarLoop]: Abstraction has 173 states and 184 transitions. [2020-10-26 19:08:41,265 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-26 19:08:41,265 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 184 transitions. [2020-10-26 19:08:41,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-10-26 19:08:41,266 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:08:41,266 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 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] [2020-10-26 19:08:41,266 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-26 19:08:41,266 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:08:41,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:08:41,267 INFO L82 PathProgramCache]: Analyzing trace with hash 1138752170, now seen corresponding path program 16 times [2020-10-26 19:08:41,267 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:08:41,267 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1789355572] [2020-10-26 19:08:41,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:08:41,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:08:41,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:08:41,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:08:41,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:08:41,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:08:44,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:08:44,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:08:44,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:08:46,292 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:08:46,292 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 123 [2020-10-26 19:08:46,292 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-26 19:08:46,293 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-26 19:08:46,293 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:08:46,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-26 19:08:46,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:08:46,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-26 19:08:46,293 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:08:46,578 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:08:46,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:08:46,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:08:46,584 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:08:46,584 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:08:46,584 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:08:46,584 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:08:46,584 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:08:46,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:08:46,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:08:46,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:08:46,584 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:08:46,596 INFO L134 CoverageAnalysis]: Checked inductivity of 278 backedges. 36 proven. 49 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2020-10-26 19:08:46,596 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1789355572] [2020-10-26 19:08:46,596 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:08:46,596 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-26 19:08:46,597 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495478394] [2020-10-26 19:08:46,597 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-26 19:08:46,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:08:46,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-26 19:08:46,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2020-10-26 19:08:46,598 INFO L87 Difference]: Start difference. First operand 173 states and 184 transitions. Second operand 18 states. [2020-10-26 19:08:47,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:08:47,720 INFO L93 Difference]: Finished difference Result 247 states and 267 transitions. [2020-10-26 19:08:47,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-26 19:08:47,721 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 113 [2020-10-26 19:08:47,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:08:47,722 INFO L225 Difference]: With dead ends: 247 [2020-10-26 19:08:47,723 INFO L226 Difference]: Without dead ends: 124 [2020-10-26 19:08:47,724 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=215, Invalid=487, Unknown=0, NotChecked=0, Total=702 [2020-10-26 19:08:47,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-10-26 19:08:47,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2020-10-26 19:08:47,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-10-26 19:08:47,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 130 transitions. [2020-10-26 19:08:47,742 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 130 transitions. Word has length 113 [2020-10-26 19:08:47,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:08:47,742 INFO L481 AbstractCegarLoop]: Abstraction has 124 states and 130 transitions. [2020-10-26 19:08:47,742 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-26 19:08:47,742 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 130 transitions. [2020-10-26 19:08:47,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2020-10-26 19:08:47,744 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:08:47,744 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 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] [2020-10-26 19:08:47,744 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-26 19:08:47,744 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:08:47,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:08:47,745 INFO L82 PathProgramCache]: Analyzing trace with hash -47868108, now seen corresponding path program 17 times [2020-10-26 19:08:47,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:08:47,745 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1000451147] [2020-10-26 19:08:47,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:08:47,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:08:47,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:08:50,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:08:53,095 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:08:53,095 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 133 [2020-10-26 19:08:53,095 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:08:53,096 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5229 [2020-10-26 19:08:53,096 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:08:53,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 97 [2020-10-26 19:08:53,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:08:53,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 117 [2020-10-26 19:08:53,096 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:08:55,422 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 42 [2020-10-26 19:08:55,617 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 39 [2020-10-26 19:08:55,806 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 39 [2020-10-26 19:08:56,010 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 43 [2020-10-26 19:08:56,225 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 43 [2020-10-26 19:08:56,479 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 46 [2020-10-26 19:08:56,711 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 41 [2020-10-26 19:08:56,944 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 38 [2020-10-26 19:08:57,157 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 38 [2020-10-26 19:08:57,381 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 41 [2020-10-26 19:08:58,045 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 36 [2020-10-26 19:08:59,563 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 33 [2020-10-26 19:08:59,836 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 37 [2020-10-26 19:09:00,104 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 34 [2020-10-26 19:09:01,185 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 41 [2020-10-26 19:09:01,490 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 38 [2020-10-26 19:09:01,837 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 41 [2020-10-26 19:09:02,512 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 39 [2020-10-26 19:09:02,931 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 43 [2020-10-26 19:09:03,321 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 36 [2020-10-26 19:09:03,723 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 39 [2020-10-26 19:09:04,152 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 40 [2020-10-26 19:09:04,570 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 38 [2020-10-26 19:09:05,002 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 37 [2020-10-26 19:09:05,400 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 36 [2020-10-26 19:09:05,747 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 38 [2020-10-26 19:09:06,082 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 35 [2020-10-26 19:09:06,391 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 32 [2020-10-26 19:09:06,951 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 45 [2020-10-26 19:09:07,391 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 46 [2020-10-26 19:09:07,857 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 49 [2020-10-26 19:09:08,286 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 51 [2020-10-26 19:09:08,718 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 41 [2020-10-26 19:09:09,146 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 44 [2020-10-26 19:09:09,570 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 47 [2020-10-26 19:09:09,954 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 45 [2020-10-26 19:09:10,353 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 45 [2020-10-26 19:09:10,768 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 49 [2020-10-26 19:09:11,144 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 48 [2020-10-26 19:09:11,518 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 45 [2020-10-26 19:09:11,866 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 45 [2020-10-26 19:09:16,119 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:09:16,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:09:16,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:09:16,130 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:09:16,131 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:09:16,131 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:09:16,131 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:09:16,131 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:09:16,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:09:16,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:09:16,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:09:16,131 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:09:16,294 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 55 proven. 288 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:09:16,294 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1000451147] [2020-10-26 19:09:16,294 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:09:16,294 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [94] total 94 [2020-10-26 19:09:16,295 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86677951] [2020-10-26 19:09:16,295 INFO L461 AbstractCegarLoop]: Interpolant automaton has 94 states [2020-10-26 19:09:16,295 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:09:16,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2020-10-26 19:09:16,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1097, Invalid=7645, Unknown=0, NotChecked=0, Total=8742 [2020-10-26 19:09:16,298 INFO L87 Difference]: Start difference. First operand 124 states and 130 transitions. Second operand 94 states. [2020-10-26 19:09:17,152 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 178 DAG size of output: 36 [2020-10-26 19:09:18,149 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 60 [2020-10-26 19:09:18,565 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 60 [2020-10-26 19:09:19,791 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 73 [2020-10-26 19:09:20,527 WARN L193 SmtUtils]: Spent 406.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 88 [2020-10-26 19:09:21,153 WARN L193 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 71 [2020-10-26 19:09:21,802 WARN L193 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 58 [2020-10-26 19:09:22,480 WARN L193 SmtUtils]: Spent 341.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 77 [2020-10-26 19:09:23,211 WARN L193 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 62 [2020-10-26 19:09:23,643 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 61 [2020-10-26 19:09:23,999 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 50 [2020-10-26 19:09:24,362 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 55 [2020-10-26 19:09:24,752 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 61 [2020-10-26 19:09:25,247 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 61 [2020-10-26 19:09:25,708 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 59 [2020-10-26 19:09:26,118 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 58 [2020-10-26 19:09:26,533 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 57 [2020-10-26 19:09:26,941 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 56 [2020-10-26 19:09:27,367 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 54 [2020-10-26 19:09:27,941 WARN L193 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 82 [2020-10-26 19:09:28,416 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 60 [2020-10-26 19:09:28,809 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 38 [2020-10-26 19:09:29,567 WARN L193 SmtUtils]: Spent 369.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 72 [2020-10-26 19:09:30,127 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 50 [2020-10-26 19:09:30,858 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 46 [2020-10-26 19:09:31,585 WARN L193 SmtUtils]: Spent 349.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 75 [2020-10-26 19:09:42,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:09:42,085 INFO L93 Difference]: Finished difference Result 252 states and 270 transitions. [2020-10-26 19:09:42,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2020-10-26 19:09:42,088 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 123 [2020-10-26 19:09:42,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:09:42,089 INFO L225 Difference]: With dead ends: 252 [2020-10-26 19:09:42,090 INFO L226 Difference]: Without dead ends: 127 [2020-10-26 19:09:42,094 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 3 SyntacticMatches, 5 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3875 ImplicationChecksByTransitivity, 33.4s TimeCoverageRelationStatistics Valid=2077, Invalid=13673, Unknown=0, NotChecked=0, Total=15750 [2020-10-26 19:09:42,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-10-26 19:09:42,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 126. [2020-10-26 19:09:42,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-10-26 19:09:42,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 132 transitions. [2020-10-26 19:09:42,110 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 132 transitions. Word has length 123 [2020-10-26 19:09:42,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:09:42,110 INFO L481 AbstractCegarLoop]: Abstraction has 126 states and 132 transitions. [2020-10-26 19:09:42,110 INFO L482 AbstractCegarLoop]: Interpolant automaton has 94 states. [2020-10-26 19:09:42,110 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 132 transitions. [2020-10-26 19:09:42,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2020-10-26 19:09:42,111 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:09:42,111 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 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] [2020-10-26 19:09:42,112 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-26 19:09:42,112 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:09:42,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:09:42,112 INFO L82 PathProgramCache]: Analyzing trace with hash 2000487862, now seen corresponding path program 18 times [2020-10-26 19:09:42,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:09:42,113 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1782022812] [2020-10-26 19:09:42,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:09:42,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:09:42,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:09:42,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:09:42,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:09:42,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:09:46,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:09:47,137 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:09:47,138 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 135 [2020-10-26 19:09:47,138 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:09:47,138 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-26 19:09:47,138 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:09:47,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-26 19:09:47,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:09:47,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-26 19:09:47,138 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:09:47,727 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:09:47,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:09:47,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:09:47,735 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:09:47,735 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:09:47,735 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:09:47,735 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:09:47,735 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:09:47,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:09:47,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:09:47,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:09:47,736 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:09:47,768 INFO L134 CoverageAnalysis]: Checked inductivity of 358 backedges. 36 proven. 77 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2020-10-26 19:09:47,769 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1782022812] [2020-10-26 19:09:47,769 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:09:47,769 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-26 19:09:47,769 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504181630] [2020-10-26 19:09:47,770 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-26 19:09:47,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:09:47,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-26 19:09:47,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2020-10-26 19:09:47,771 INFO L87 Difference]: Start difference. First operand 126 states and 132 transitions. Second operand 20 states. [2020-10-26 19:09:49,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:09:49,315 INFO L93 Difference]: Finished difference Result 224 states and 240 transitions. [2020-10-26 19:09:49,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-26 19:09:49,317 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 125 [2020-10-26 19:09:49,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:09:49,318 INFO L225 Difference]: With dead ends: 224 [2020-10-26 19:09:49,319 INFO L226 Difference]: Without dead ends: 138 [2020-10-26 19:09:49,319 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=252, Invalid=618, Unknown=0, NotChecked=0, Total=870 [2020-10-26 19:09:49,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-10-26 19:09:49,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 138. [2020-10-26 19:09:49,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-10-26 19:09:49,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 144 transitions. [2020-10-26 19:09:49,339 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 144 transitions. Word has length 125 [2020-10-26 19:09:49,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:09:49,339 INFO L481 AbstractCegarLoop]: Abstraction has 138 states and 144 transitions. [2020-10-26 19:09:49,339 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-26 19:09:49,339 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 144 transitions. [2020-10-26 19:09:49,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2020-10-26 19:09:49,341 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:09:49,341 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 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] [2020-10-26 19:09:49,341 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-26 19:09:49,341 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:09:49,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:09:49,342 INFO L82 PathProgramCache]: Analyzing trace with hash -2043185278, now seen corresponding path program 19 times [2020-10-26 19:09:49,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:09:49,342 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1475100003] [2020-10-26 19:09:49,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:09:49,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:09:49,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:09:52,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:09:55,148 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:09:55,148 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 147 [2020-10-26 19:09:55,148 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:09:55,148 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5675 [2020-10-26 19:09:55,149 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:09:55,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 102 [2020-10-26 19:09:55,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:09:55,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 131 [2020-10-26 19:09:55,149 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0