/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=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.3 --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_sum4.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-29 03:23:01,591 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-29 03:23:01,594 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-29 03:23:01,633 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-29 03:23:01,634 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-29 03:23:01,636 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-29 03:23:01,637 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-29 03:23:01,640 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-29 03:23:01,642 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-29 03:23:01,643 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-29 03:23:01,645 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-29 03:23:01,646 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-29 03:23:01,647 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-29 03:23:01,648 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-29 03:23:01,649 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-29 03:23:01,651 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-29 03:23:01,652 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-29 03:23:01,653 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-29 03:23:01,655 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-29 03:23:01,658 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-29 03:23:01,660 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-29 03:23:01,662 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-29 03:23:01,664 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-29 03:23:01,665 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-29 03:23:01,668 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-29 03:23:01,669 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-29 03:23:01,669 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-29 03:23:01,670 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-29 03:23:01,671 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-29 03:23:01,672 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-29 03:23:01,673 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-29 03:23:01,674 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-29 03:23:01,675 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-29 03:23:01,676 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-29 03:23:01,677 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-29 03:23:01,678 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-29 03:23:01,679 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-29 03:23:01,679 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-29 03:23:01,679 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-29 03:23:01,681 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-29 03:23:01,682 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-29 03:23:01,683 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 [2020-10-29 03:23:01,741 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-29 03:23:01,742 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-29 03:23:01,744 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-29 03:23:01,745 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-29 03:23:01,745 INFO L138 SettingsManager]: * Use SBE=true [2020-10-29 03:23:01,746 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-29 03:23:01,746 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-29 03:23:01,748 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-29 03:23:01,749 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-29 03:23:01,749 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-29 03:23:01,749 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-29 03:23:01,750 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-29 03:23:01,750 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-29 03:23:01,750 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-29 03:23:01,751 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-29 03:23:01,751 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-29 03:23:01,751 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-29 03:23:01,751 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-29 03:23:01,752 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-29 03:23:01,753 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-29 03:23:01,753 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-29 03:23:01,753 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 03:23:01,754 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-29 03:23:01,754 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-29 03:23:01,754 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-29 03:23:01,754 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-29 03:23:01,755 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-29 03:23:01,755 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-29 03:23:01,755 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-29 03:23:01,755 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true;unknown-allowed=true; [2020-10-29 03:23:02,207 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-29 03:23:02,234 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-29 03:23:02,237 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-29 03:23:02,239 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-29 03:23:02,240 INFO L275 PluginConnector]: CDTParser initialized [2020-10-29 03:23:02,241 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-crafted/zero_sum4.c [2020-10-29 03:23:02,330 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c29429b16/73a9b5db694245e88c3cfa966bcf8e9e/FLAGe973e3f6d [2020-10-29 03:23:03,008 INFO L306 CDTParser]: Found 1 translation units. [2020-10-29 03:23:03,010 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-crafted/zero_sum4.c [2020-10-29 03:23:03,021 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c29429b16/73a9b5db694245e88c3cfa966bcf8e9e/FLAGe973e3f6d [2020-10-29 03:23:03,346 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c29429b16/73a9b5db694245e88c3cfa966bcf8e9e [2020-10-29 03:23:03,350 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-29 03:23:03,357 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-29 03:23:03,359 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-29 03:23:03,359 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-29 03:23:03,363 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-29 03:23:03,364 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 03:23:03" (1/1) ... [2020-10-29 03:23:03,369 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@24d8da27 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 03:23:03, skipping insertion in model container [2020-10-29 03:23:03,370 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 03:23:03" (1/1) ... [2020-10-29 03:23:03,380 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-29 03:23:03,406 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-29 03:23:03,582 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 03:23:03,592 INFO L203 MainTranslator]: Completed pre-run [2020-10-29 03:23:03,630 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 03:23:03,658 INFO L208 MainTranslator]: Completed translation [2020-10-29 03:23:03,659 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 03:23:03 WrapperNode [2020-10-29 03:23:03,659 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-29 03:23:03,660 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-29 03:23:03,660 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-29 03:23:03,660 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-29 03:23:03,675 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 03:23:03" (1/1) ... [2020-10-29 03:23:03,678 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 03:23:03" (1/1) ... [2020-10-29 03:23:03,698 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 03:23:03" (1/1) ... [2020-10-29 03:23:03,699 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 03:23:03" (1/1) ... [2020-10-29 03:23:03,725 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 03:23:03" (1/1) ... [2020-10-29 03:23:03,744 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 03:23:03" (1/1) ... [2020-10-29 03:23:03,747 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 03:23:03" (1/1) ... [2020-10-29 03:23:03,757 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-29 03:23:03,759 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-29 03:23:03,760 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-29 03:23:03,760 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-29 03:23:03,761 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 03:23:03" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 03:23:03,860 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-29 03:23:03,860 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-29 03:23:03,861 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-29 03:23:03,861 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-29 03:23:03,862 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-29 03:23:03,863 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-29 03:23:03,863 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-29 03:23:03,863 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-29 03:23:03,863 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-29 03:23:03,864 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-29 03:23:03,865 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-29 03:23:03,866 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-29 03:23:03,866 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_short [2020-10-29 03:23:03,866 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-29 03:23:03,866 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-29 03:23:03,868 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-29 03:23:03,868 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-29 03:23:03,868 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-29 03:23:03,868 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-29 03:23:03,869 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-29 03:23:04,478 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-29 03:23:04,478 INFO L298 CfgBuilder]: Removed 9 assume(true) statements. [2020-10-29 03:23:04,480 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 03:23:04 BoogieIcfgContainer [2020-10-29 03:23:04,481 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-29 03:23:04,483 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-29 03:23:04,483 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-29 03:23:04,487 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-29 03:23:04,488 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.10 03:23:03" (1/3) ... [2020-10-29 03:23:04,489 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e6a2f8f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 03:23:04, skipping insertion in model container [2020-10-29 03:23:04,489 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 03:23:03" (2/3) ... [2020-10-29 03:23:04,490 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e6a2f8f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 03:23:04, skipping insertion in model container [2020-10-29 03:23:04,490 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 03:23:04" (3/3) ... [2020-10-29 03:23:04,492 INFO L111 eAbstractionObserver]: Analyzing ICFG zero_sum4.c [2020-10-29 03:23:04,508 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-29 03:23:04,514 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-29 03:23:04,529 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-29 03:23:04,562 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-29 03:23:04,563 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-29 03:23:04,563 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-29 03:23:04,563 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-29 03:23:04,563 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-29 03:23:04,563 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-29 03:23:04,563 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-29 03:23:04,564 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-29 03:23:04,586 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states. [2020-10-29 03:23:04,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-29 03:23:04,595 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:23:04,596 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] [2020-10-29 03:23:04,597 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:23:04,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:23:04,605 INFO L82 PathProgramCache]: Analyzing trace with hash 784075536, now seen corresponding path program 1 times [2020-10-29 03:23:04,616 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:23:04,617 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [567524123] [2020-10-29 03:23:04,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:23:04,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:23:04,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:04,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:04,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:04,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:05,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:05,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:05,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:05,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:05,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:05,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:08,739 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:23:08,740 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-29 03:23:08,740 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-29 03:23:08,740 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3966 [2020-10-29 03:23:08,743 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:23:08,744 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:23:08,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 03:23:08,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 03:23:08,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-29 03:23:08,745 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-29 03:23:08,929 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:23:08,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:23:08,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:08,951 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:23:08,951 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:23:08,952 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:23:08,952 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-29 03:23:08,952 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:23:08,952 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:23:08,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:23:08,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:23:08,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:23:08,953 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 03:23:08,971 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 03:23:08,972 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [567524123] [2020-10-29 03:23:08,975 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 03:23:08,975 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 03:23:08,977 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362134532] [2020-10-29 03:23:08,984 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 03:23:08,985 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:23:09,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 03:23:09,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-29 03:23:09,017 INFO L87 Difference]: Start difference. First operand 50 states. Second operand 5 states. [2020-10-29 03:23:09,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:23:09,562 INFO L93 Difference]: Finished difference Result 109 states and 161 transitions. [2020-10-29 03:23:09,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-29 03:23:09,565 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 29 [2020-10-29 03:23:09,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:23:09,575 INFO L225 Difference]: With dead ends: 109 [2020-10-29 03:23:09,575 INFO L226 Difference]: Without dead ends: 55 [2020-10-29 03:23:09,579 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-29 03:23:09,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-29 03:23:09,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 47. [2020-10-29 03:23:09,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-29 03:23:09,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 55 transitions. [2020-10-29 03:23:09,634 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 55 transitions. Word has length 29 [2020-10-29 03:23:09,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:23:09,635 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 55 transitions. [2020-10-29 03:23:09,635 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 03:23:09,635 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 55 transitions. [2020-10-29 03:23:09,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-29 03:23:09,637 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:23:09,637 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:23:09,638 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-29 03:23:09,638 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:23:09,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:23:09,639 INFO L82 PathProgramCache]: Analyzing trace with hash -1846873870, now seen corresponding path program 1 times [2020-10-29 03:23:09,639 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:23:09,639 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [579686956] [2020-10-29 03:23:09,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:23:09,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:23:09,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:09,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:09,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:09,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:09,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:09,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:10,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:10,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:14,673 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:23:14,674 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-29 03:23:14,674 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-29 03:23:14,675 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-29 03:23:14,676 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:23:14,676 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:23:14,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 03:23:14,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 03:23:14,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-29 03:23:14,677 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 03:23:14,787 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:23:14,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:23:14,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:14,800 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:23:14,800 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:23:14,801 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:23:14,801 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-29 03:23:14,801 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:23:14,802 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:23:14,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:23:14,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:23:14,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:23:14,803 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 03:23:14,812 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-29 03:23:14,813 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [579686956] [2020-10-29 03:23:14,814 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:23:14,814 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-29 03:23:14,815 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778232913] [2020-10-29 03:23:14,817 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 03:23:14,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:23:14,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 03:23:14,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-29 03:23:14,833 INFO L87 Difference]: Start difference. First operand 47 states and 55 transitions. Second operand 6 states. [2020-10-29 03:23:15,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:23:15,258 INFO L93 Difference]: Finished difference Result 97 states and 119 transitions. [2020-10-29 03:23:15,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-29 03:23:15,259 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 45 [2020-10-29 03:23:15,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:23:15,262 INFO L225 Difference]: With dead ends: 97 [2020-10-29 03:23:15,262 INFO L226 Difference]: Without dead ends: 63 [2020-10-29 03:23:15,264 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 [2020-10-29 03:23:15,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-29 03:23:15,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2020-10-29 03:23:15,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-29 03:23:15,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 71 transitions. [2020-10-29 03:23:15,295 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 71 transitions. Word has length 45 [2020-10-29 03:23:15,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:23:15,295 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 71 transitions. [2020-10-29 03:23:15,295 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 03:23:15,296 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 71 transitions. [2020-10-29 03:23:15,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-29 03:23:15,300 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:23:15,300 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 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, 1, 1] [2020-10-29 03:23:15,301 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-29 03:23:15,301 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:23:15,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:23:15,304 INFO L82 PathProgramCache]: Analyzing trace with hash -350043134, now seen corresponding path program 2 times [2020-10-29 03:23:15,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:23:15,305 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [928744391] [2020-10-29 03:23:15,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:23:15,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:23:15,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:15,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:15,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:16,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:17,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:20,334 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:23:20,334 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-29 03:23:20,335 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 03:23:20,335 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-29 03:23:20,335 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:23:20,335 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:23:20,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-29 03:23:20,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 03:23:20,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-29 03:23:20,336 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 03:23:21,294 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:23:21,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:23:21,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:21,303 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:23:21,304 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:23:21,304 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:23:21,304 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 03:23:21,304 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:23:21,305 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:23:21,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:23:21,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:23:21,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:23:21,305 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 03:23:21,333 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 03:23:21,334 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [928744391] [2020-10-29 03:23:21,334 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:23:21,334 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-29 03:23:21,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101854387] [2020-10-29 03:23:21,335 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-29 03:23:21,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:23:21,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-29 03:23:21,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2020-10-29 03:23:21,337 INFO L87 Difference]: Start difference. First operand 63 states and 71 transitions. Second operand 19 states. [2020-10-29 03:23:22,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:23:22,480 INFO L93 Difference]: Finished difference Result 113 states and 128 transitions. [2020-10-29 03:23:22,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-29 03:23:22,481 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 61 [2020-10-29 03:23:22,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:23:22,483 INFO L225 Difference]: With dead ends: 113 [2020-10-29 03:23:22,483 INFO L226 Difference]: Without dead ends: 107 [2020-10-29 03:23:22,484 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 13 SyntacticMatches, 9 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2020-10-29 03:23:22,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-29 03:23:22,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 104. [2020-10-29 03:23:22,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-29 03:23:22,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 119 transitions. [2020-10-29 03:23:22,501 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 119 transitions. Word has length 61 [2020-10-29 03:23:22,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:23:22,501 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 119 transitions. [2020-10-29 03:23:22,501 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-29 03:23:22,502 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 119 transitions. [2020-10-29 03:23:22,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-29 03:23:22,506 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:23:22,506 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 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, 1, 1] [2020-10-29 03:23:22,507 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-29 03:23:22,507 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:23:22,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:23:22,508 INFO L82 PathProgramCache]: Analyzing trace with hash 991755204, now seen corresponding path program 3 times [2020-10-29 03:23:22,508 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:23:22,508 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1935470084] [2020-10-29 03:23:22,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:23:22,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:23:22,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:22,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:22,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:22,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:22,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:23,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:27,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:27,530 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:23:27,530 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-29 03:23:27,530 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-29 03:23:27,539 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-29 03:23:27,540 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:23:27,540 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:23:27,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-29 03:23:27,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-10-29 03:23:27,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-29 03:23:27,541 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:23:27,676 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:23:27,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:23:27,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:27,684 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:23:27,685 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:23:27,685 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:23:27,685 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 03:23:27,685 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:23:27,686 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:23:27,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:23:27,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:23:27,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:23:27,686 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:23:27,702 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-10-29 03:23:27,702 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1935470084] [2020-10-29 03:23:27,703 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:23:27,703 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-29 03:23:27,705 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227154596] [2020-10-29 03:23:27,705 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-29 03:23:27,706 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:23:27,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-29 03:23:27,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-29 03:23:27,707 INFO L87 Difference]: Start difference. First operand 104 states and 119 transitions. Second operand 10 states. [2020-10-29 03:23:28,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:23:28,686 INFO L93 Difference]: Finished difference Result 163 states and 190 transitions. [2020-10-29 03:23:28,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-29 03:23:28,688 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 63 [2020-10-29 03:23:28,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:23:28,689 INFO L225 Difference]: With dead ends: 163 [2020-10-29 03:23:28,689 INFO L226 Difference]: Without dead ends: 121 [2020-10-29 03:23:28,693 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2020-10-29 03:23:28,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-29 03:23:28,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 110. [2020-10-29 03:23:28,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-29 03:23:28,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 124 transitions. [2020-10-29 03:23:28,712 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 124 transitions. Word has length 63 [2020-10-29 03:23:28,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:23:28,712 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 124 transitions. [2020-10-29 03:23:28,714 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-29 03:23:28,714 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 124 transitions. [2020-10-29 03:23:28,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-29 03:23:28,716 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:23:28,717 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 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, 1, 1] [2020-10-29 03:23:28,720 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-29 03:23:28,720 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:23:28,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:23:28,720 INFO L82 PathProgramCache]: Analyzing trace with hash -951692028, now seen corresponding path program 4 times [2020-10-29 03:23:28,722 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:23:28,722 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [25504372] [2020-10-29 03:23:28,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:23:28,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:23:28,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:28,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:28,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:28,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:28,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:28,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:29,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:33,746 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:23:33,746 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-29 03:23:33,747 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-29 03:23:33,747 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-29 03:23:33,747 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:23:33,747 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:23:33,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-29 03:23:33,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-10-29 03:23:33,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-29 03:23:33,748 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 03:23:33,893 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:23:33,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:23:33,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:33,899 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:23:33,899 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:23:33,900 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:23:33,900 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 03:23:33,900 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:23:33,900 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:23:33,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:23:33,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:23:33,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:23:33,901 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:23:33,909 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-10-29 03:23:33,910 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [25504372] [2020-10-29 03:23:33,910 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:23:33,910 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-29 03:23:33,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826002341] [2020-10-29 03:23:33,911 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-29 03:23:33,911 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:23:33,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-29 03:23:33,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-29 03:23:33,912 INFO L87 Difference]: Start difference. First operand 110 states and 124 transitions. Second operand 10 states. [2020-10-29 03:23:34,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:23:34,501 INFO L93 Difference]: Finished difference Result 185 states and 206 transitions. [2020-10-29 03:23:34,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-29 03:23:34,502 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 63 [2020-10-29 03:23:34,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:23:34,503 INFO L225 Difference]: With dead ends: 185 [2020-10-29 03:23:34,503 INFO L226 Difference]: Without dead ends: 87 [2020-10-29 03:23:34,506 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2020-10-29 03:23:34,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-29 03:23:34,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 79. [2020-10-29 03:23:34,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-29 03:23:34,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 87 transitions. [2020-10-29 03:23:34,531 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 87 transitions. Word has length 63 [2020-10-29 03:23:34,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:23:34,532 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 87 transitions. [2020-10-29 03:23:34,532 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-29 03:23:34,532 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 87 transitions. [2020-10-29 03:23:34,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-29 03:23:34,533 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:23:34,533 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 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, 1, 1, 1, 1] [2020-10-29 03:23:34,534 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-29 03:23:34,534 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:23:34,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:23:34,541 INFO L82 PathProgramCache]: Analyzing trace with hash -904153326, now seen corresponding path program 5 times [2020-10-29 03:23:34,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:23:34,541 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1112903562] [2020-10-29 03:23:34,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:23:34,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:23:34,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:34,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:35,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:36,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:38,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:39,580 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:23:39,581 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-29 03:23:39,581 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 03:23:39,581 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-29 03:23:39,581 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:23:39,581 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:23:39,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 52 [2020-10-29 03:23:39,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 03:23:39,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-29 03:23:39,582 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 03:23:41,639 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:23:41,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:23:41,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:41,646 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:23:41,646 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:23:41,646 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:23:41,646 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 03:23:41,646 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:23:41,647 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:23:41,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:23:41,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:23:41,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:23:41,647 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:23:41,693 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 03:23:41,693 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1112903562] [2020-10-29 03:23:41,693 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:23:41,694 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-29 03:23:41,694 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412815965] [2020-10-29 03:23:41,694 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-29 03:23:41,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:23:41,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-29 03:23:41,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1155, Unknown=0, NotChecked=0, Total=1260 [2020-10-29 03:23:41,696 INFO L87 Difference]: Start difference. First operand 79 states and 87 transitions. Second operand 36 states. [2020-10-29 03:23:43,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:23:43,468 INFO L93 Difference]: Finished difference Result 143 states and 158 transitions. [2020-10-29 03:23:43,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-29 03:23:43,472 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 77 [2020-10-29 03:23:43,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:23:43,473 INFO L225 Difference]: With dead ends: 143 [2020-10-29 03:23:43,473 INFO L226 Difference]: Without dead ends: 137 [2020-10-29 03:23:43,475 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 14 SyntacticMatches, 7 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 397 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=115, Invalid=1291, Unknown=0, NotChecked=0, Total=1406 [2020-10-29 03:23:43,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-10-29 03:23:43,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 132. [2020-10-29 03:23:43,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-10-29 03:23:43,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 147 transitions. [2020-10-29 03:23:43,493 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 147 transitions. Word has length 77 [2020-10-29 03:23:43,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:23:43,494 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 147 transitions. [2020-10-29 03:23:43,494 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-29 03:23:43,494 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 147 transitions. [2020-10-29 03:23:43,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-29 03:23:43,496 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:23:43,496 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 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, 1, 1, 1, 1] [2020-10-29 03:23:43,496 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-29 03:23:43,497 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:23:43,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:23:43,497 INFO L82 PathProgramCache]: Analyzing trace with hash 1655790292, now seen corresponding path program 6 times [2020-10-29 03:23:43,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:23:43,498 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2428078] [2020-10-29 03:23:43,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:23:43,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:23:43,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:43,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:43,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:43,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:43,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:44,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:48,510 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:23:48,510 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-29 03:23:48,511 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-29 03:23:48,511 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-29 03:23:48,511 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:23:48,511 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:23:48,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-29 03:23:48,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-29 03:23:48,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-29 03:23:48,512 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:23:48,637 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:23:48,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:23:48,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:48,644 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:23:48,644 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:23:48,644 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:23:48,644 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 03:23:48,645 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:23:48,645 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:23:48,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:23:48,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:23:48,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:23:48,646 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:23:48,656 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2020-10-29 03:23:48,657 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2428078] [2020-10-29 03:23:48,657 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:23:48,657 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-29 03:23:48,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944712100] [2020-10-29 03:23:48,659 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-29 03:23:48,660 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:23:48,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-29 03:23:48,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-29 03:23:48,662 INFO L87 Difference]: Start difference. First operand 132 states and 147 transitions. Second operand 12 states. [2020-10-29 03:23:49,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:23:49,416 INFO L93 Difference]: Finished difference Result 269 states and 302 transitions. [2020-10-29 03:23:49,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-29 03:23:49,417 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 79 [2020-10-29 03:23:49,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:23:49,419 INFO L225 Difference]: With dead ends: 269 [2020-10-29 03:23:49,419 INFO L226 Difference]: Without dead ends: 157 [2020-10-29 03:23:49,424 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2020-10-29 03:23:49,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2020-10-29 03:23:49,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 141. [2020-10-29 03:23:49,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-10-29 03:23:49,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 155 transitions. [2020-10-29 03:23:49,461 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 155 transitions. Word has length 79 [2020-10-29 03:23:49,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:23:49,461 INFO L481 AbstractCegarLoop]: Abstraction has 141 states and 155 transitions. [2020-10-29 03:23:49,461 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-29 03:23:49,461 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 155 transitions. [2020-10-29 03:23:49,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-29 03:23:49,470 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:23:49,470 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 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, 1, 1, 1, 1] [2020-10-29 03:23:49,471 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-29 03:23:49,474 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:23:49,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:23:49,475 INFO L82 PathProgramCache]: Analyzing trace with hash 1003391572, now seen corresponding path program 7 times [2020-10-29 03:23:49,475 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:23:49,476 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [521567485] [2020-10-29 03:23:49,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:23:49,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:23:49,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:49,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:49,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:49,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:49,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:49,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:54,503 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:23:54,503 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-29 03:23:54,503 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-29 03:23:54,503 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-29 03:23:54,503 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:23:54,503 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:23:54,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-29 03:23:54,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-29 03:23:54,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-29 03:23:54,504 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:23:54,637 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:23:54,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:23:54,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:54,646 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:23:54,646 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:23:54,646 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:23:54,646 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-29 03:23:54,647 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:23:54,647 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:23:54,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:23:54,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:23:54,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:23:54,648 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 03:23:54,667 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2020-10-29 03:23:54,667 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [521567485] [2020-10-29 03:23:54,669 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:23:54,669 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-29 03:23:54,670 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432136406] [2020-10-29 03:23:54,670 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-29 03:23:54,671 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:23:54,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-29 03:23:54,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-29 03:23:54,675 INFO L87 Difference]: Start difference. First operand 141 states and 155 transitions. Second operand 12 states. [2020-10-29 03:23:55,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:23:55,570 INFO L93 Difference]: Finished difference Result 149 states and 163 transitions. [2020-10-29 03:23:55,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-29 03:23:55,570 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 79 [2020-10-29 03:23:55,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:23:55,571 INFO L225 Difference]: With dead ends: 149 [2020-10-29 03:23:55,572 INFO L226 Difference]: Without dead ends: 95 [2020-10-29 03:23:55,573 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2020-10-29 03:23:55,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-29 03:23:55,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2020-10-29 03:23:55,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-10-29 03:23:55,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 103 transitions. [2020-10-29 03:23:55,591 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 103 transitions. Word has length 79 [2020-10-29 03:23:55,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:23:55,591 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 103 transitions. [2020-10-29 03:23:55,591 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-29 03:23:55,592 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 103 transitions. [2020-10-29 03:23:55,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-10-29 03:23:55,598 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:23:55,599 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 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, 1, 1, 1, 1] [2020-10-29 03:23:55,602 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-29 03:23:55,603 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:23:55,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:23:55,604 INFO L82 PathProgramCache]: Analyzing trace with hash -44709342, now seen corresponding path program 8 times [2020-10-29 03:23:55,604 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:23:55,604 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1617344422] [2020-10-29 03:23:55,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:23:55,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:23:55,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:55,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:57,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:24:00,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:24:01,758 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:24:01,759 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 103 [2020-10-29 03:24:01,759 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 03:24:01,759 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6141 [2020-10-29 03:24:01,759 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:24:01,760 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:24:01,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 70 [2020-10-29 03:24:01,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 03:24:01,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 87 [2020-10-29 03:24:01,760 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:24:06,798 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:24:06,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:24:06,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:24:06,808 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:24:06,808 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:24:06,808 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:24:06,808 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 03:24:06,808 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:24:06,809 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:24:06,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:24:06,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:24:06,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:24:06,809 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:24:06,897 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 03:24:06,897 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1617344422] [2020-10-29 03:24:06,898 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:24:06,898 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53] total 53 [2020-10-29 03:24:06,898 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967165432] [2020-10-29 03:24:06,899 INFO L461 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-10-29 03:24:06,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:24:06,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-10-29 03:24:06,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=2626, Unknown=0, NotChecked=0, Total=2756 [2020-10-29 03:24:06,902 INFO L87 Difference]: Start difference. First operand 95 states and 103 transitions. Second operand 53 states. [2020-10-29 03:24:08,859 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 68 [2020-10-29 03:24:11,481 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 62 [2020-10-29 03:24:11,969 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 62 [2020-10-29 03:24:12,397 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 58 [2020-10-29 03:24:16,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:24:16,210 INFO L93 Difference]: Finished difference Result 173 states and 188 transitions. [2020-10-29 03:24:16,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-29 03:24:16,210 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 93 [2020-10-29 03:24:16,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:24:16,211 INFO L225 Difference]: With dead ends: 173 [2020-10-29 03:24:16,212 INFO L226 Difference]: Without dead ends: 167 [2020-10-29 03:24:16,216 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 14 SyntacticMatches, 8 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1233 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=358, Invalid=6782, Unknown=0, NotChecked=0, Total=7140 [2020-10-29 03:24:16,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2020-10-29 03:24:16,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 160. [2020-10-29 03:24:16,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-10-29 03:24:16,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 175 transitions. [2020-10-29 03:24:16,233 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 175 transitions. Word has length 93 [2020-10-29 03:24:16,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:24:16,234 INFO L481 AbstractCegarLoop]: Abstraction has 160 states and 175 transitions. [2020-10-29 03:24:16,234 INFO L482 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-10-29 03:24:16,234 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 175 transitions. [2020-10-29 03:24:16,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-10-29 03:24:16,235 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:24:16,235 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 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, 1, 1, 1, 1] [2020-10-29 03:24:16,236 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-29 03:24:16,236 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:24:16,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:24:16,236 INFO L82 PathProgramCache]: Analyzing trace with hash 1927469540, now seen corresponding path program 9 times [2020-10-29 03:24:16,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:24:16,237 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [860622373] [2020-10-29 03:24:16,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:24:16,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:24:16,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:24:16,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:24:16,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:24:16,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:24:16,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:24:16,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:24:21,250 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:24:21,251 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 105 [2020-10-29 03:24:21,251 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-29 03:24:21,251 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-29 03:24:21,251 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:24:21,251 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:24:21,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-29 03:24:21,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 34 [2020-10-29 03:24:21,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-29 03:24:21,252 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:24:21,452 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:24:21,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:24:21,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:24:21,458 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:24:21,459 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:24:21,459 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:24:21,460 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 03:24:21,461 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:24:21,461 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:24:21,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:24:21,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:24:21,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:24:21,464 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-29 03:24:21,477 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2020-10-29 03:24:21,478 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [860622373] [2020-10-29 03:24:21,478 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:24:21,478 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-29 03:24:21,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386382335] [2020-10-29 03:24:21,479 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-29 03:24:21,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:24:21,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-29 03:24:21,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-10-29 03:24:21,480 INFO L87 Difference]: Start difference. First operand 160 states and 175 transitions. Second operand 14 states. [2020-10-29 03:24:22,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:24:22,748 INFO L93 Difference]: Finished difference Result 247 states and 274 transitions. [2020-10-29 03:24:22,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-29 03:24:22,749 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 95 [2020-10-29 03:24:22,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:24:22,751 INFO L225 Difference]: With dead ends: 247 [2020-10-29 03:24:22,751 INFO L226 Difference]: Without dead ends: 181 [2020-10-29 03:24:22,753 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=145, Invalid=455, Unknown=0, NotChecked=0, Total=600 [2020-10-29 03:24:22,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2020-10-29 03:24:22,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 162. [2020-10-29 03:24:22,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-10-29 03:24:22,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 176 transitions. [2020-10-29 03:24:22,770 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 176 transitions. Word has length 95 [2020-10-29 03:24:22,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:24:22,770 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 176 transitions. [2020-10-29 03:24:22,770 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-29 03:24:22,770 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 176 transitions. [2020-10-29 03:24:22,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-10-29 03:24:22,771 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:24:22,772 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 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, 1, 1, 1, 1] [2020-10-29 03:24:22,772 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-29 03:24:22,772 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:24:22,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:24:22,773 INFO L82 PathProgramCache]: Analyzing trace with hash 416305956, now seen corresponding path program 10 times [2020-10-29 03:24:22,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:24:22,773 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [60703192] [2020-10-29 03:24:22,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:24:22,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:24:22,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:24:22,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:24:22,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:24:22,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:24:22,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:24:23,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:24:27,787 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:24:27,787 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 105 [2020-10-29 03:24:27,787 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-29 03:24:27,787 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-29 03:24:27,787 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:24:27,787 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:24:27,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-29 03:24:27,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-29 03:24:27,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-10-29 03:24:27,788 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:24:27,963 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:24:27,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:24:27,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:24:27,969 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:24:27,969 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:24:27,969 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:24:27,969 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 03:24:27,970 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:24:27,970 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:24:27,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:24:27,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:24:27,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:24:27,970 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:24:27,982 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2020-10-29 03:24:27,982 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [60703192] [2020-10-29 03:24:27,982 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:24:27,982 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-29 03:24:27,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353926086] [2020-10-29 03:24:27,983 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-29 03:24:27,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:24:27,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-29 03:24:27,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-10-29 03:24:27,984 INFO L87 Difference]: Start difference. First operand 162 states and 176 transitions. Second operand 14 states. [2020-10-29 03:24:28,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:24:28,909 INFO L93 Difference]: Finished difference Result 269 states and 290 transitions. [2020-10-29 03:24:28,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-29 03:24:28,910 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 95 [2020-10-29 03:24:28,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:24:28,911 INFO L225 Difference]: With dead ends: 269 [2020-10-29 03:24:28,912 INFO L226 Difference]: Without dead ends: 119 [2020-10-29 03:24:28,913 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2020-10-29 03:24:28,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-10-29 03:24:28,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 111. [2020-10-29 03:24:28,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-10-29 03:24:28,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 119 transitions. [2020-10-29 03:24:28,924 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 119 transitions. Word has length 95 [2020-10-29 03:24:28,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:24:28,925 INFO L481 AbstractCegarLoop]: Abstraction has 111 states and 119 transitions. [2020-10-29 03:24:28,925 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-29 03:24:28,925 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 119 transitions. [2020-10-29 03:24:28,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-10-29 03:24:28,926 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:24:28,926 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 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, 1, 1, 1, 1] [2020-10-29 03:24:28,927 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-29 03:24:28,927 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:24:28,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:24:28,927 INFO L82 PathProgramCache]: Analyzing trace with hash -816775886, now seen corresponding path program 11 times [2020-10-29 03:24:28,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:24:28,928 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1447571725] [2020-10-29 03:24:28,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:24:28,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:24:28,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:24:29,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:24:31,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:24:33,945 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:24:33,945 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 119 [2020-10-29 03:24:33,945 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 03:24:33,945 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-29 03:24:33,945 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:24:33,945 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:24:33,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 88 [2020-10-29 03:24:33,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 03:24:33,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 103 [2020-10-29 03:24:33,946 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:24:36,285 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 36 [2020-10-29 03:24:36,531 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 34 [2020-10-29 03:24:36,741 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 35 [2020-10-29 03:24:36,972 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 37 [2020-10-29 03:24:37,195 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 36 [2020-10-29 03:24:37,436 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 38 [2020-10-29 03:24:37,687 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 40 [2020-10-29 03:24:37,938 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 42 [2020-10-29 03:24:38,223 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 34 [2020-10-29 03:24:38,698 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 45 [2020-10-29 03:24:38,978 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 45 [2020-10-29 03:24:39,199 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 36 [2020-10-29 03:24:39,637 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 35 [2020-10-29 03:24:39,874 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 38 [2020-10-29 03:24:40,100 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 36 [2020-10-29 03:24:40,342 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 34 [2020-10-29 03:24:40,666 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 46 [2020-10-29 03:24:40,987 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 42 [2020-10-29 03:24:41,483 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 38 [2020-10-29 03:24:41,738 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 35 [2020-10-29 03:24:42,070 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 45 [2020-10-29 03:24:42,413 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 47 [2020-10-29 03:24:42,759 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 42 [2020-10-29 03:24:43,111 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 43 [2020-10-29 03:24:43,430 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 43 [2020-10-29 03:24:43,719 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 41 [2020-10-29 03:24:44,015 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 42 [2020-10-29 03:24:44,322 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 46 [2020-10-29 03:24:44,617 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 43 [2020-10-29 03:24:45,329 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 38 [2020-10-29 03:24:47,086 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 29 [2020-10-29 03:24:48,182 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 31 [2020-10-29 03:24:53,151 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:24:53,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:24:53,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:24:53,163 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:24:53,163 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:24:53,163 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:24:53,163 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 03:24:53,163 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:24:53,163 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:24:53,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:24:53,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:24:53,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:24:53,164 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:24:53,285 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 7 proven. 193 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 03:24:53,286 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1447571725] [2020-10-29 03:24:53,286 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:24:53,286 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [89] total 89 [2020-10-29 03:24:53,286 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115458776] [2020-10-29 03:24:53,287 INFO L461 AbstractCegarLoop]: Interpolant automaton has 89 states [2020-10-29 03:24:53,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:24:53,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2020-10-29 03:24:53,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=414, Invalid=7418, Unknown=0, NotChecked=0, Total=7832 [2020-10-29 03:24:53,290 INFO L87 Difference]: Start difference. First operand 111 states and 119 transitions. Second operand 89 states. [2020-10-29 03:24:53,648 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 3 [2020-10-29 03:24:54,213 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 165 DAG size of output: 36 [2020-10-29 03:24:56,706 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 53 [2020-10-29 03:24:57,033 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 47 [2020-10-29 03:24:57,729 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 63 [2020-10-29 03:24:58,164 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 60 [2020-10-29 03:24:58,816 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 44 [2020-10-29 03:24:59,130 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 60 [2020-10-29 03:25:00,718 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 58 [2020-10-29 03:25:01,201 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 72 [2020-10-29 03:25:01,819 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 47 [2020-10-29 03:25:02,238 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 39 [2020-10-29 03:25:02,900 WARN L193 SmtUtils]: Spent 412.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 68 [2020-10-29 03:25:03,581 WARN L193 SmtUtils]: Spent 315.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 62 [2020-10-29 03:25:05,523 WARN L193 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 62 [2020-10-29 03:25:06,001 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 45 [2020-10-29 03:25:06,749 WARN L193 SmtUtils]: Spent 351.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 85 [2020-10-29 03:25:07,313 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 38 [2020-10-29 03:25:08,052 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 37 [2020-10-29 03:25:08,648 WARN L193 SmtUtils]: Spent 388.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 52 [2020-10-29 03:25:09,244 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 48 [2020-10-29 03:25:09,872 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 43 [2020-10-29 03:25:10,426 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 39 [2020-10-29 03:25:11,017 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 39 [2020-10-29 03:25:11,624 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 36 [2020-10-29 03:25:12,259 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 29 [2020-10-29 03:25:12,926 WARN L193 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 25 [2020-10-29 03:25:13,510 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 26 [2020-10-29 03:25:14,427 WARN L193 SmtUtils]: Spent 510.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 46 [2020-10-29 03:25:14,980 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 34 [2020-10-29 03:25:15,756 WARN L193 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 46 [2020-10-29 03:25:16,069 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 34 [2020-10-29 03:25:17,025 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 32 [2020-10-29 03:25:17,474 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 25 [2020-10-29 03:25:18,005 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 34 [2020-10-29 03:25:18,478 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 35 [2020-10-29 03:25:18,896 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 35 [2020-10-29 03:25:19,309 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 31 [2020-10-29 03:25:19,844 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 32 [2020-10-29 03:25:20,859 WARN L193 SmtUtils]: Spent 602.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 54 [2020-10-29 03:25:22,102 WARN L193 SmtUtils]: Spent 541.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 102 [2020-10-29 03:25:22,677 WARN L193 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 63 [2020-10-29 03:25:23,810 WARN L193 SmtUtils]: Spent 650.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 105 [2020-10-29 03:25:24,440 WARN L193 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 58 [2020-10-29 03:25:30,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:25:30,378 INFO L93 Difference]: Finished difference Result 221 states and 241 transitions. [2020-10-29 03:25:30,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2020-10-29 03:25:30,380 INFO L78 Accepts]: Start accepts. Automaton has 89 states. Word has length 109 [2020-10-29 03:25:30,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:25:30,382 INFO L225 Difference]: With dead ends: 221 [2020-10-29 03:25:30,382 INFO L226 Difference]: Without dead ends: 202 [2020-10-29 03:25:30,388 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4783 ImplicationChecksByTransitivity, 41.8s TimeCoverageRelationStatistics Valid=1493, Invalid=20559, Unknown=0, NotChecked=0, Total=22052 [2020-10-29 03:25:30,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2020-10-29 03:25:30,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 176. [2020-10-29 03:25:30,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2020-10-29 03:25:30,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 190 transitions. [2020-10-29 03:25:30,408 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 190 transitions. Word has length 109 [2020-10-29 03:25:30,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:25:30,408 INFO L481 AbstractCegarLoop]: Abstraction has 176 states and 190 transitions. [2020-10-29 03:25:30,408 INFO L482 AbstractCegarLoop]: Interpolant automaton has 89 states. [2020-10-29 03:25:30,409 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 190 transitions. [2020-10-29 03:25:30,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-10-29 03:25:30,410 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:25:30,410 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 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, 1, 1, 1, 1] [2020-10-29 03:25:30,411 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-29 03:25:30,411 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:25:30,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:25:30,411 INFO L82 PathProgramCache]: Analyzing trace with hash -416188172, now seen corresponding path program 12 times [2020-10-29 03:25:30,412 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:25:30,412 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1668618960] [2020-10-29 03:25:30,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:25:30,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:25:30,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:25:30,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:25:30,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:25:30,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:25:30,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:25:32,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:25:35,426 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:25:35,426 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 121 [2020-10-29 03:25:35,426 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-29 03:25:35,426 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-29 03:25:35,427 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:25:35,427 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:25:35,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-29 03:25:35,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-29 03:25:35,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-29 03:25:35,427 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:25:35,784 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:25:35,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:25:35,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:25:35,789 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:25:35,789 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:25:35,789 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:25:35,789 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 03:25:35,790 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:25:35,790 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:25:35,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:25:35,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:25:35,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:25:35,790 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:25:35,804 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2020-10-29 03:25:35,804 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1668618960] [2020-10-29 03:25:35,804 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:25:35,804 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-29 03:25:35,804 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033147698] [2020-10-29 03:25:35,805 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-29 03:25:35,805 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:25:35,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-29 03:25:35,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2020-10-29 03:25:35,806 INFO L87 Difference]: Start difference. First operand 176 states and 190 transitions. Second operand 16 states. [2020-10-29 03:25:37,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:25:37,939 INFO L93 Difference]: Finished difference Result 406 states and 442 transitions. [2020-10-29 03:25:37,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-29 03:25:37,942 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 111 [2020-10-29 03:25:37,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:25:37,944 INFO L225 Difference]: With dead ends: 406 [2020-10-29 03:25:37,944 INFO L226 Difference]: Without dead ends: 213 [2020-10-29 03:25:37,946 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=123, Invalid=383, Unknown=0, NotChecked=0, Total=506 [2020-10-29 03:25:37,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2020-10-29 03:25:37,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 197. [2020-10-29 03:25:37,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 197 states. [2020-10-29 03:25:37,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 211 transitions. [2020-10-29 03:25:37,981 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 211 transitions. Word has length 111 [2020-10-29 03:25:37,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:25:37,981 INFO L481 AbstractCegarLoop]: Abstraction has 197 states and 211 transitions. [2020-10-29 03:25:37,981 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-29 03:25:37,981 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 211 transitions. [2020-10-29 03:25:37,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-10-29 03:25:37,983 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:25:37,983 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 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, 1, 1, 1, 1] [2020-10-29 03:25:37,983 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-29 03:25:37,983 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:25:37,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:25:37,984 INFO L82 PathProgramCache]: Analyzing trace with hash 982927476, now seen corresponding path program 13 times [2020-10-29 03:25:37,984 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:25:37,985 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1711300173] [2020-10-29 03:25:37,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:25:37,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:25:37,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:25:38,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:25:38,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:25:38,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:25:38,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:25:39,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:25:42,996 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:25:42,997 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 121 [2020-10-29 03:25:42,997 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-29 03:25:42,997 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-29 03:25:42,997 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:25:42,997 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:25:42,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-29 03:25:42,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-29 03:25:42,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-29 03:25:42,998 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:25:43,345 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:25:43,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:25:43,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:25:43,351 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:25:43,351 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:25:43,351 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:25:43,352 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 03:25:43,352 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:25:43,352 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:25:43,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:25:43,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:25:43,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:25:43,353 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:25:43,373 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2020-10-29 03:25:43,373 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1711300173] [2020-10-29 03:25:43,373 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:25:43,374 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-29 03:25:43,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125850867] [2020-10-29 03:25:43,374 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-29 03:25:43,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:25:43,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-29 03:25:43,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2020-10-29 03:25:43,377 INFO L87 Difference]: Start difference. First operand 197 states and 211 transitions. Second operand 16 states. [2020-10-29 03:25:45,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:25:45,328 INFO L93 Difference]: Finished difference Result 205 states and 219 transitions. [2020-10-29 03:25:45,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-29 03:25:45,330 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 111 [2020-10-29 03:25:45,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:25:45,333 INFO L225 Difference]: With dead ends: 205 [2020-10-29 03:25:45,333 INFO L226 Difference]: Without dead ends: 127 [2020-10-29 03:25:45,334 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=193, Invalid=619, Unknown=0, NotChecked=0, Total=812 [2020-10-29 03:25:45,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-10-29 03:25:45,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2020-10-29 03:25:45,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-10-29 03:25:45,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 135 transitions. [2020-10-29 03:25:45,350 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 135 transitions. Word has length 111 [2020-10-29 03:25:45,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:25:45,350 INFO L481 AbstractCegarLoop]: Abstraction has 127 states and 135 transitions. [2020-10-29 03:25:45,350 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-29 03:25:45,350 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 135 transitions. [2020-10-29 03:25:45,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2020-10-29 03:25:45,352 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:25:45,352 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 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, 1, 1, 1, 1] [2020-10-29 03:25:45,352 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-29 03:25:45,353 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:25:45,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:25:45,353 INFO L82 PathProgramCache]: Analyzing trace with hash 109924418, now seen corresponding path program 14 times [2020-10-29 03:25:45,354 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:25:45,354 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1508522178] [2020-10-29 03:25:45,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:25:45,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:25:45,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:25:45,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:25:48,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:25:51,164 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:25:51,165 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 135 [2020-10-29 03:25:51,165 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 03:25:51,165 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5800 [2020-10-29 03:25:51,165 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:25:51,165 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:25:51,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 102 [2020-10-29 03:25:51,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 03:25:51,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 119 [2020-10-29 03:25:51,166 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:25:52,706 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2020-10-29 03:25:53,367 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 35 [2020-10-29 03:25:58,476 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 30 [2020-10-29 03:25:58,812 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 26 [2020-10-29 03:25:59,158 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 22 [2020-10-29 03:26:02,279 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 37 [2020-10-29 03:26:02,700 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 34 [2020-10-29 03:26:17,896 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:26:17,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:26:17,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:26:17,917 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:26:17,918 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:26:17,918 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:26:17,918 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 03:26:17,918 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:26:17,919 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:26:17,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:26:17,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:26:17,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:26:17,920 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 03:26:18,085 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 0 proven. 288 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 03:26:18,085 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1508522178] [2020-10-29 03:26:18,085 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:26:18,085 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [96] total 96 [2020-10-29 03:26:18,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686311065] [2020-10-29 03:26:18,086 INFO L461 AbstractCegarLoop]: Interpolant automaton has 96 states [2020-10-29 03:26:18,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:26:18,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2020-10-29 03:26:18,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=8867, Unknown=0, NotChecked=0, Total=9120 [2020-10-29 03:26:18,090 INFO L87 Difference]: Start difference. First operand 127 states and 135 transitions. Second operand 96 states. [2020-10-29 03:26:20,225 WARN L193 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 51 [2020-10-29 03:26:21,243 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-10-29 03:26:26,231 WARN L193 SmtUtils]: Spent 812.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 78 [2020-10-29 03:26:27,670 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-10-29 03:26:28,543 WARN L193 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 74 [2020-10-29 03:26:29,137 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 49 [2020-10-29 03:26:30,125 WARN L193 SmtUtils]: Spent 325.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 71 [2020-10-29 03:26:30,901 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-10-29 03:26:32,009 WARN L193 SmtUtils]: Spent 319.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 65 [2020-10-29 03:26:33,638 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-29 03:26:35,123 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-29 03:26:37,371 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2020-10-29 03:26:38,990 WARN L193 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 70 [2020-10-29 03:26:39,558 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 46 [2020-10-29 03:26:40,303 WARN L193 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 69 [2020-10-29 03:26:41,767 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-10-29 03:26:42,628 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 49 [2020-10-29 03:26:43,638 WARN L193 SmtUtils]: Spent 328.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 70 [2020-10-29 03:26:45,280 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-29 03:26:46,087 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 48 [2020-10-29 03:26:46,807 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 47 [2020-10-29 03:26:47,447 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 45