/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SingleStatement --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.2 --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/ldv-regression/test25-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 04:23:17,594 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 04:23:17,599 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 04:23:17,643 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 04:23:17,643 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 04:23:17,650 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 04:23:17,653 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 04:23:17,656 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 04:23:17,659 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 04:23:17,662 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 04:23:17,663 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 04:23:17,664 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 04:23:17,665 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 04:23:17,668 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 04:23:17,671 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 04:23:17,672 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 04:23:17,674 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 04:23:17,675 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 04:23:17,677 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 04:23:17,685 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 04:23:17,687 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 04:23:17,688 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 04:23:17,689 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 04:23:17,690 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 04:23:17,702 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 04:23:17,702 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 04:23:17,702 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 04:23:17,712 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 04:23:17,712 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 04:23:17,713 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 04:23:17,714 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 04:23:17,715 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 04:23:17,715 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 04:23:17,716 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 04:23:17,717 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 04:23:17,718 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 04:23:17,718 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 04:23:17,719 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 04:23:17,719 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 04:23:17,720 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 04:23:17,721 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 04:23:17,722 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-09-25 04:23:17,747 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 04:23:17,747 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 04:23:17,748 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 04:23:17,748 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 04:23:17,749 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 04:23:17,749 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 04:23:17,749 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 04:23:17,749 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 04:23:17,750 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 04:23:17,750 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 04:23:17,750 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 04:23:17,750 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 04:23:17,750 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 04:23:17,751 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 04:23:17,751 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 04:23:17,751 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 04:23:17,751 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 04:23:17,751 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 04:23:17,752 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 04:23:17,752 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 04:23:17,752 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 04:23:17,752 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 04:23:17,753 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 04:23:17,753 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 04:23:17,753 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 04:23:17,753 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 04:23:17,753 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 04:23:17,754 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 04:23:17,754 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 04:23:17,754 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SingleStatement Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.2;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.2;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.2;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.2;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.2;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.2;log-additional-information=true; [2020-09-25 04:23:18,216 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 04:23:18,234 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 04:23:18,238 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 04:23:18,240 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 04:23:18,240 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 04:23:18,241 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/test25-2.c [2020-09-25 04:23:18,335 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2b2d5be25/7c9ed23d3ffb46f1b8193ca80acc652e/FLAG62fa4698a [2020-09-25 04:23:18,849 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 04:23:18,850 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/ldv-regression/test25-2.c [2020-09-25 04:23:18,858 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2b2d5be25/7c9ed23d3ffb46f1b8193ca80acc652e/FLAG62fa4698a [2020-09-25 04:23:19,197 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2b2d5be25/7c9ed23d3ffb46f1b8193ca80acc652e [2020-09-25 04:23:19,211 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 04:23:19,217 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 04:23:19,219 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 04:23:19,219 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 04:23:19,223 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 04:23:19,224 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 04:23:19" (1/1) ... [2020-09-25 04:23:19,229 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@87e4b2e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 04:23:19, skipping insertion in model container [2020-09-25 04:23:19,229 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 04:23:19" (1/1) ... [2020-09-25 04:23:19,238 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 04:23:19,264 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 04:23:19,494 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 04:23:19,505 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 04:23:19,529 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 04:23:19,639 INFO L208 MainTranslator]: Completed translation [2020-09-25 04:23:19,640 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 04:23:19 WrapperNode [2020-09-25 04:23:19,640 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 04:23:19,641 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 04:23:19,641 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 04:23:19,641 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 04:23:19,656 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 04:23:19" (1/1) ... [2020-09-25 04:23:19,656 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 04:23:19" (1/1) ... [2020-09-25 04:23:19,666 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 04:23:19" (1/1) ... [2020-09-25 04:23:19,666 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 04:23:19" (1/1) ... [2020-09-25 04:23:19,677 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 04:23:19" (1/1) ... [2020-09-25 04:23:19,683 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 04:23:19" (1/1) ... [2020-09-25 04:23:19,685 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 04:23:19" (1/1) ... [2020-09-25 04:23:19,687 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 04:23:19,688 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 04:23:19,688 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 04:23:19,688 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 04:23:19,689 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 04:23:19" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 04:23:19,779 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 04:23:19,779 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 04:23:19,780 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2020-09-25 04:23:19,780 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 04:23:19,780 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 04:23:19,780 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-25 04:23:19,781 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-09-25 04:23:19,781 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-09-25 04:23:19,781 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-25 04:23:19,781 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 04:23:19,781 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-25 04:23:19,781 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-25 04:23:19,782 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-09-25 04:23:19,782 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-25 04:23:19,782 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 04:23:19,782 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 04:23:20,135 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 04:23:20,136 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-09-25 04:23:20,141 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 04:23:20 BoogieIcfgContainer [2020-09-25 04:23:20,141 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 04:23:20,142 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 04:23:20,143 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 04:23:20,146 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 04:23:20,147 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 04:23:19" (1/3) ... [2020-09-25 04:23:20,148 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d9e78b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 04:23:20, skipping insertion in model container [2020-09-25 04:23:20,148 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 04:23:19" (2/3) ... [2020-09-25 04:23:20,148 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d9e78b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 04:23:20, skipping insertion in model container [2020-09-25 04:23:20,148 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 04:23:20" (3/3) ... [2020-09-25 04:23:20,150 INFO L109 eAbstractionObserver]: Analyzing ICFG test25-2.c [2020-09-25 04:23:20,161 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 04:23:20,173 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 04:23:20,195 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 04:23:20,223 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 04:23:20,223 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 04:23:20,223 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 04:23:20,224 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 04:23:20,224 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 04:23:20,224 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 04:23:20,224 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 04:23:20,224 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 04:23:20,247 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states. [2020-09-25 04:23:20,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-09-25 04:23:20,254 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 04:23:20,255 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] [2020-09-25 04:23:20,256 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 04:23:20,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 04:23:20,262 INFO L82 PathProgramCache]: Analyzing trace with hash 144198137, now seen corresponding path program 1 times [2020-09-25 04:23:20,272 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 04:23:20,273 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [73778535] [2020-09-25 04:23:20,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 04:23:20,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:23:20,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:23:20,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:23:20,794 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:23:20,798 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-09-25 04:23:20,798 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 04:23:20,798 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 373 [2020-09-25 04:23:20,804 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:23:20,804 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:23:20,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 04:23:20,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 36 [2020-09-25 04:23:20,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 04:23:20,806 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-09-25 04:23:20,872 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 04:23:20,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:23:20,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:23:20,889 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:23:20,889 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 04:23:20,890 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 04:23:20,890 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-09-25 04:23:20,890 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:23:20,890 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:23:20,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 04:23:20,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 04:23:20,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 04:23:20,892 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 04:23:20,899 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-09-25 04:23:20,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:23:20,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:23:20,933 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:23:20,934 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-09-25 04:23:20,934 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 04:23:20,934 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-09-25 04:23:20,935 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:23:20,935 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:23:20,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 04:23:20,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-25 04:23:20,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 04:23:20,936 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 04:23:20,949 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 04:23:20,950 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [73778535] [2020-09-25 04:23:20,952 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 04:23:20,952 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-25 04:23:20,953 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837543776] [2020-09-25 04:23:20,959 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-25 04:23:20,960 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 04:23:20,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-25 04:23:20,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-25 04:23:20,981 INFO L87 Difference]: Start difference. First operand 77 states. Second operand 3 states. [2020-09-25 04:23:21,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 04:23:21,151 INFO L93 Difference]: Finished difference Result 124 states and 134 transitions. [2020-09-25 04:23:21,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-25 04:23:21,153 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 44 [2020-09-25 04:23:21,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 04:23:21,166 INFO L225 Difference]: With dead ends: 124 [2020-09-25 04:23:21,167 INFO L226 Difference]: Without dead ends: 60 [2020-09-25 04:23:21,171 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-25 04:23:21,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-09-25 04:23:21,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2020-09-25 04:23:21,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-09-25 04:23:21,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2020-09-25 04:23:21,225 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 44 [2020-09-25 04:23:21,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 04:23:21,226 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2020-09-25 04:23:21,226 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-25 04:23:21,226 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2020-09-25 04:23:21,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-09-25 04:23:21,228 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 04:23:21,228 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 04:23:21,229 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 04:23:21,229 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 04:23:21,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 04:23:21,230 INFO L82 PathProgramCache]: Analyzing trace with hash 608042528, now seen corresponding path program 1 times [2020-09-25 04:23:21,230 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 04:23:21,231 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1969492980] [2020-09-25 04:23:21,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 04:23:21,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:23:21,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:23:21,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:23:22,041 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:23:22,042 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-09-25 04:23:22,042 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 04:23:22,042 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 788 [2020-09-25 04:23:22,043 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:23:22,043 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:23:22,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 04:23:22,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-09-25 04:23:22,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-09-25 04:23:22,044 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 04:23:22,078 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 04:23:22,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:23:22,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:23:22,087 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:23:22,087 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 04:23:22,088 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 04:23:22,088 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-25 04:23:22,088 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:23:22,089 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:23:22,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 04:23:22,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 04:23:22,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 04:23:22,090 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 04:23:22,094 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-09-25 04:23:22,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:23:22,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:23:22,107 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:23:22,107 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-09-25 04:23:22,107 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 04:23:22,108 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-09-25 04:23:22,108 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:23:22,108 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:23:22,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 04:23:22,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-25 04:23:22,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 04:23:22,109 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 04:23:22,115 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 04:23:22,116 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1969492980] [2020-09-25 04:23:22,116 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 04:23:22,117 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-25 04:23:22,117 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824039286] [2020-09-25 04:23:22,119 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-25 04:23:22,119 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 04:23:22,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-25 04:23:22,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 04:23:22,120 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand 4 states. [2020-09-25 04:23:22,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 04:23:22,254 INFO L93 Difference]: Finished difference Result 104 states and 106 transitions. [2020-09-25 04:23:22,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-25 04:23:22,255 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 46 [2020-09-25 04:23:22,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 04:23:22,257 INFO L225 Difference]: With dead ends: 104 [2020-09-25 04:23:22,257 INFO L226 Difference]: Without dead ends: 69 [2020-09-25 04:23:22,258 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 04:23:22,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-09-25 04:23:22,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 61. [2020-09-25 04:23:22,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-09-25 04:23:22,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 62 transitions. [2020-09-25 04:23:22,268 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 62 transitions. Word has length 46 [2020-09-25 04:23:22,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 04:23:22,269 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 62 transitions. [2020-09-25 04:23:22,269 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-25 04:23:22,269 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 62 transitions. [2020-09-25 04:23:22,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-09-25 04:23:22,271 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 04:23:22,271 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 04:23:22,272 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 04:23:22,272 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 04:23:22,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 04:23:22,272 INFO L82 PathProgramCache]: Analyzing trace with hash 1644606330, now seen corresponding path program 1 times [2020-09-25 04:23:22,273 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 04:23:22,273 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [467908899] [2020-09-25 04:23:22,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 04:23:22,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:23:22,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:23:22,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:23:23,732 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:23:23,733 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-09-25 04:23:23,733 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 04:23:23,733 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1442 [2020-09-25 04:23:23,734 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:23:23,734 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:23:23,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 04:23:23,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-09-25 04:23:23,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-09-25 04:23:23,736 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 04:23:23,797 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 04:23:23,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:23:23,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:23:23,805 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:23:23,806 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 04:23:23,806 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 04:23:23,806 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-25 04:23:23,807 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:23:23,807 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:23:23,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 04:23:23,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 04:23:23,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 04:23:23,808 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 04:23:23,810 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-09-25 04:23:23,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:23:23,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:23:23,822 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:23:23,823 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-09-25 04:23:23,823 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 04:23:23,823 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-09-25 04:23:23,823 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:23:23,824 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:23:23,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 04:23:23,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-25 04:23:23,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 04:23:23,825 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 04:23:23,856 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 04:23:23,857 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [467908899] [2020-09-25 04:23:23,857 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 04:23:23,858 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-09-25 04:23:23,858 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366589124] [2020-09-25 04:23:23,859 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-25 04:23:23,859 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 04:23:23,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-25 04:23:23,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-09-25 04:23:23,860 INFO L87 Difference]: Start difference. First operand 61 states and 62 transitions. Second operand 6 states. [2020-09-25 04:23:24,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 04:23:24,071 INFO L93 Difference]: Finished difference Result 114 states and 116 transitions. [2020-09-25 04:23:24,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-25 04:23:24,072 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 56 [2020-09-25 04:23:24,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 04:23:24,073 INFO L225 Difference]: With dead ends: 114 [2020-09-25 04:23:24,074 INFO L226 Difference]: Without dead ends: 79 [2020-09-25 04:23:24,074 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-09-25 04:23:24,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-09-25 04:23:24,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 71. [2020-09-25 04:23:24,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-09-25 04:23:24,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 72 transitions. [2020-09-25 04:23:24,084 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 72 transitions. Word has length 56 [2020-09-25 04:23:24,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 04:23:24,085 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 72 transitions. [2020-09-25 04:23:24,085 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-25 04:23:24,085 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 72 transitions. [2020-09-25 04:23:24,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-09-25 04:23:24,087 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 04:23:24,087 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 04:23:24,087 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 04:23:24,087 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 04:23:24,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 04:23:24,088 INFO L82 PathProgramCache]: Analyzing trace with hash 278397012, now seen corresponding path program 2 times [2020-09-25 04:23:24,088 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 04:23:24,089 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1107151849] [2020-09-25 04:23:24,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 04:23:24,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:23:24,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:23:24,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:23:26,366 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:23:26,367 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-09-25 04:23:26,367 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 04:23:26,368 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2242 [2020-09-25 04:23:26,368 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:23:26,369 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:23:26,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 04:23:26,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-09-25 04:23:26,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-09-25 04:23:26,370 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 04:23:26,456 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 04:23:26,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:23:26,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:23:26,482 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:23:26,482 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 04:23:26,483 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 04:23:26,483 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-25 04:23:26,483 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:23:26,483 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:23:26,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 04:23:26,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 04:23:26,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 04:23:26,484 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 04:23:26,487 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2020-09-25 04:23:26,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:23:26,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:23:26,498 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:23:26,498 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-09-25 04:23:26,499 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 04:23:26,499 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-25 04:23:26,499 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:23:26,499 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:23:26,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 04:23:26,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-25 04:23:26,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 04:23:26,500 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 04:23:26,508 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 04:23:26,508 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1107151849] [2020-09-25 04:23:26,509 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 04:23:26,509 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-25 04:23:26,509 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49251253] [2020-09-25 04:23:26,510 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-25 04:23:26,510 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 04:23:26,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-25 04:23:26,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-09-25 04:23:26,511 INFO L87 Difference]: Start difference. First operand 71 states and 72 transitions. Second operand 8 states. [2020-09-25 04:23:26,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 04:23:26,711 INFO L93 Difference]: Finished difference Result 124 states and 126 transitions. [2020-09-25 04:23:26,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-25 04:23:26,711 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 66 [2020-09-25 04:23:26,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 04:23:26,713 INFO L225 Difference]: With dead ends: 124 [2020-09-25 04:23:26,713 INFO L226 Difference]: Without dead ends: 89 [2020-09-25 04:23:26,714 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2020-09-25 04:23:26,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-09-25 04:23:26,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 81. [2020-09-25 04:23:26,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-09-25 04:23:26,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 82 transitions. [2020-09-25 04:23:26,722 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 82 transitions. Word has length 66 [2020-09-25 04:23:26,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 04:23:26,723 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 82 transitions. [2020-09-25 04:23:26,723 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-25 04:23:26,723 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 82 transitions. [2020-09-25 04:23:26,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-09-25 04:23:26,724 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 04:23:26,725 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 04:23:26,725 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-25 04:23:26,725 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 04:23:26,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 04:23:26,726 INFO L82 PathProgramCache]: Analyzing trace with hash 767198382, now seen corresponding path program 3 times [2020-09-25 04:23:26,726 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 04:23:26,726 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1583860982] [2020-09-25 04:23:26,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 04:23:26,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:23:26,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:23:26,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:23:30,112 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:23:30,113 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-09-25 04:23:30,113 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 04:23:30,113 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3363 [2020-09-25 04:23:30,114 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:23:30,114 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:23:30,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 04:23:30,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-09-25 04:23:30,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-09-25 04:23:30,115 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 04:23:30,224 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 04:23:30,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:23:30,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:23:30,233 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:23:30,233 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 04:23:30,233 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 04:23:30,234 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-25 04:23:30,234 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:23:30,234 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:23:30,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 04:23:30,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 04:23:30,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 04:23:30,235 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 04:23:30,238 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2020-09-25 04:23:30,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:23:30,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:23:30,254 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:23:30,255 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-09-25 04:23:30,255 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 04:23:30,255 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-09-25 04:23:30,255 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:23:30,256 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:23:30,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 04:23:30,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-25 04:23:30,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 04:23:30,257 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 04:23:30,269 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 04:23:30,270 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1583860982] [2020-09-25 04:23:30,270 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 04:23:30,270 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-25 04:23:30,270 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186958098] [2020-09-25 04:23:30,272 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-25 04:23:30,275 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 04:23:30,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-25 04:23:30,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-09-25 04:23:30,277 INFO L87 Difference]: Start difference. First operand 81 states and 82 transitions. Second operand 10 states. [2020-09-25 04:23:30,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 04:23:30,580 INFO L93 Difference]: Finished difference Result 134 states and 136 transitions. [2020-09-25 04:23:30,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-25 04:23:30,581 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 76 [2020-09-25 04:23:30,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 04:23:30,582 INFO L225 Difference]: With dead ends: 134 [2020-09-25 04:23:30,582 INFO L226 Difference]: Without dead ends: 99 [2020-09-25 04:23:30,583 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2020-09-25 04:23:30,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-09-25 04:23:30,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 91. [2020-09-25 04:23:30,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-09-25 04:23:30,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 92 transitions. [2020-09-25 04:23:30,597 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 92 transitions. Word has length 76 [2020-09-25 04:23:30,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 04:23:30,597 INFO L479 AbstractCegarLoop]: Abstraction has 91 states and 92 transitions. [2020-09-25 04:23:30,597 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-25 04:23:30,599 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 92 transitions. [2020-09-25 04:23:30,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-09-25 04:23:30,601 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 04:23:30,602 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 04:23:30,603 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-25 04:23:30,603 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 04:23:30,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 04:23:30,603 INFO L82 PathProgramCache]: Analyzing trace with hash 216981640, now seen corresponding path program 4 times [2020-09-25 04:23:30,603 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 04:23:30,605 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2007460412] [2020-09-25 04:23:30,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 04:23:30,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:23:30,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:23:30,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:23:34,905 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:23:34,906 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-09-25 04:23:34,906 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 04:23:34,906 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4276 [2020-09-25 04:23:34,906 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:23:34,907 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:23:34,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-25 04:23:34,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 64 [2020-09-25 04:23:34,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-09-25 04:23:34,908 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 04:23:35,128 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 04:23:35,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:23:35,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:23:35,137 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:23:35,137 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 04:23:35,137 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 04:23:35,138 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-25 04:23:35,138 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:23:35,138 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:23:35,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 04:23:35,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 04:23:35,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 04:23:35,139 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 04:23:35,142 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2020-09-25 04:23:35,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:23:35,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:23:35,153 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:23:35,154 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-09-25 04:23:35,154 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 04:23:35,154 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-25 04:23:35,154 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:23:35,155 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:23:35,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 04:23:35,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-25 04:23:35,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 04:23:35,156 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 04:23:35,168 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-09-25 04:23:35,169 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2007460412] [2020-09-25 04:23:35,170 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 04:23:35,170 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-09-25 04:23:35,170 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315131803] [2020-09-25 04:23:35,171 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-25 04:23:35,171 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 04:23:35,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-25 04:23:35,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-09-25 04:23:35,172 INFO L87 Difference]: Start difference. First operand 91 states and 92 transitions. Second operand 9 states. [2020-09-25 04:23:35,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 04:23:35,497 INFO L93 Difference]: Finished difference Result 112 states and 113 transitions. [2020-09-25 04:23:35,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-25 04:23:35,498 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 86 [2020-09-25 04:23:35,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 04:23:35,499 INFO L225 Difference]: With dead ends: 112 [2020-09-25 04:23:35,500 INFO L226 Difference]: Without dead ends: 96 [2020-09-25 04:23:35,500 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2020-09-25 04:23:35,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-09-25 04:23:35,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 93. [2020-09-25 04:23:35,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-09-25 04:23:35,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 94 transitions. [2020-09-25 04:23:35,515 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 94 transitions. Word has length 86 [2020-09-25 04:23:35,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 04:23:35,515 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 94 transitions. [2020-09-25 04:23:35,516 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-25 04:23:35,517 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 94 transitions. [2020-09-25 04:23:35,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-09-25 04:23:35,524 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 04:23:35,525 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 04:23:35,525 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-25 04:23:35,525 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 04:23:35,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 04:23:35,526 INFO L82 PathProgramCache]: Analyzing trace with hash 49337248, now seen corresponding path program 1 times [2020-09-25 04:23:35,526 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 04:23:35,526 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2043975880] [2020-09-25 04:23:35,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 04:23:35,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:23:35,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:23:35,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:23:38,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:23:40,555 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:23:40,555 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-09-25 04:23:40,556 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 04:23:40,556 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-09-25 04:23:40,557 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:23:40,557 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:23:40,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 04:23:40,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 64 [2020-09-25 04:23:40,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-09-25 04:23:40,559 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 04:23:40,764 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 04:23:40,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:23:40,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:23:40,772 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:23:40,772 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 04:23:40,773 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 04:23:40,774 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-25 04:23:40,774 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:23:40,775 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:23:40,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 04:23:40,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 04:23:40,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 04:23:40,776 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 04:23:40,778 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2020-09-25 04:23:40,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:23:40,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:23:40,790 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:23:40,790 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-09-25 04:23:40,790 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 04:23:40,791 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-25 04:23:40,791 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:23:40,792 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:23:40,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 04:23:40,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-25 04:23:40,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 04:23:40,793 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 04:23:40,817 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-09-25 04:23:40,818 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2043975880] [2020-09-25 04:23:40,818 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 04:23:40,818 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-25 04:23:40,820 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787660175] [2020-09-25 04:23:40,821 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-25 04:23:40,822 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 04:23:40,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-25 04:23:40,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-09-25 04:23:40,823 INFO L87 Difference]: Start difference. First operand 93 states and 94 transitions. Second operand 10 states. [2020-09-25 04:23:41,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 04:23:41,334 INFO L93 Difference]: Finished difference Result 118 states and 119 transitions. [2020-09-25 04:23:41,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-25 04:23:41,335 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 92 [2020-09-25 04:23:41,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 04:23:41,337 INFO L225 Difference]: With dead ends: 118 [2020-09-25 04:23:41,338 INFO L226 Difference]: Without dead ends: 102 [2020-09-25 04:23:41,342 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2020-09-25 04:23:41,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-09-25 04:23:41,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 99. [2020-09-25 04:23:41,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-09-25 04:23:41,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 100 transitions. [2020-09-25 04:23:41,359 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 100 transitions. Word has length 92 [2020-09-25 04:23:41,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 04:23:41,362 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 100 transitions. [2020-09-25 04:23:41,362 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-25 04:23:41,362 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 100 transitions. [2020-09-25 04:23:41,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-09-25 04:23:41,365 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 04:23:41,366 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 04:23:41,366 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-25 04:23:41,366 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 04:23:41,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 04:23:41,367 INFO L82 PathProgramCache]: Analyzing trace with hash 872813752, now seen corresponding path program 2 times [2020-09-25 04:23:41,367 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 04:23:41,368 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1468464035] [2020-09-25 04:23:41,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 04:23:41,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:23:41,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:23:41,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:23:44,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:23:46,406 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:23:46,406 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 107 [2020-09-25 04:23:46,406 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 04:23:46,406 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-09-25 04:23:46,407 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:23:46,407 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:23:46,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-25 04:23:46,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-09-25 04:23:46,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-09-25 04:23:46,408 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 04:23:46,526 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 04:23:46,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:23:46,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:23:46,533 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:23:46,533 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 04:23:46,534 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 04:23:46,535 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-25 04:23:46,535 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:23:46,535 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:23:46,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 04:23:46,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 04:23:46,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 04:23:46,536 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 04:23:46,538 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2020-09-25 04:23:46,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:23:46,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:23:46,546 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:23:46,546 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-09-25 04:23:46,547 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 04:23:46,547 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-25 04:23:46,547 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:23:46,547 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:23:46,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 04:23:46,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-25 04:23:46,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 04:23:46,548 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 04:23:46,559 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-09-25 04:23:46,559 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1468464035] [2020-09-25 04:23:46,560 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 04:23:46,560 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-09-25 04:23:46,560 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993961631] [2020-09-25 04:23:46,560 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-25 04:23:46,561 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 04:23:46,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-25 04:23:46,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-09-25 04:23:46,561 INFO L87 Difference]: Start difference. First operand 99 states and 100 transitions. Second operand 12 states. [2020-09-25 04:23:46,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 04:23:46,804 INFO L93 Difference]: Finished difference Result 160 states and 162 transitions. [2020-09-25 04:23:46,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-25 04:23:46,805 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 98 [2020-09-25 04:23:46,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 04:23:46,806 INFO L225 Difference]: With dead ends: 160 [2020-09-25 04:23:46,806 INFO L226 Difference]: Without dead ends: 117 [2020-09-25 04:23:46,807 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=125, Invalid=255, Unknown=0, NotChecked=0, Total=380 [2020-09-25 04:23:46,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-09-25 04:23:46,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 109. [2020-09-25 04:23:46,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-09-25 04:23:46,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 110 transitions. [2020-09-25 04:23:46,819 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 110 transitions. Word has length 98 [2020-09-25 04:23:46,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 04:23:46,819 INFO L479 AbstractCegarLoop]: Abstraction has 109 states and 110 transitions. [2020-09-25 04:23:46,819 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-25 04:23:46,819 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 110 transitions. [2020-09-25 04:23:46,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-09-25 04:23:46,820 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 04:23:46,820 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 04:23:46,821 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-25 04:23:46,821 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 04:23:46,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 04:23:46,822 INFO L82 PathProgramCache]: Analyzing trace with hash -1007636206, now seen corresponding path program 3 times [2020-09-25 04:23:46,822 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 04:23:46,822 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [900720877] [2020-09-25 04:23:46,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 04:23:46,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:23:46,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:23:46,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:23:50,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:23:51,860 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:23:51,860 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 117 [2020-09-25 04:23:51,860 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 04:23:51,861 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-09-25 04:23:51,861 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:23:51,861 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:23:51,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-09-25 04:23:51,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 74 [2020-09-25 04:23:51,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-09-25 04:23:51,862 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 04:23:52,041 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 04:23:52,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:23:52,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:23:52,051 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:23:52,051 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 04:23:52,051 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 04:23:52,052 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-25 04:23:52,052 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:23:52,052 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:23:52,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 04:23:52,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 04:23:52,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 04:23:52,053 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 04:23:52,055 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2020-09-25 04:23:52,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:23:52,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:23:52,065 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:23:52,066 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-09-25 04:23:52,066 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 04:23:52,066 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-25 04:23:52,067 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:23:52,067 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:23:52,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 04:23:52,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-25 04:23:52,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 04:23:52,069 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 04:23:52,094 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2020-09-25 04:23:52,099 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [900720877] [2020-09-25 04:23:52,100 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 04:23:52,100 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-25 04:23:52,100 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215595805] [2020-09-25 04:23:52,101 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-25 04:23:52,101 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 04:23:52,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-25 04:23:52,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2020-09-25 04:23:52,103 INFO L87 Difference]: Start difference. First operand 109 states and 110 transitions. Second operand 11 states. [2020-09-25 04:23:52,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 04:23:52,495 INFO L93 Difference]: Finished difference Result 134 states and 135 transitions. [2020-09-25 04:23:52,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-25 04:23:52,495 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 108 [2020-09-25 04:23:52,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 04:23:52,496 INFO L225 Difference]: With dead ends: 134 [2020-09-25 04:23:52,497 INFO L226 Difference]: Without dead ends: 118 [2020-09-25 04:23:52,497 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-09-25 04:23:52,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-09-25 04:23:52,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 115. [2020-09-25 04:23:52,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-09-25 04:23:52,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 116 transitions. [2020-09-25 04:23:52,504 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 116 transitions. Word has length 108 [2020-09-25 04:23:52,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 04:23:52,505 INFO L479 AbstractCegarLoop]: Abstraction has 115 states and 116 transitions. [2020-09-25 04:23:52,505 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-25 04:23:52,505 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 116 transitions. [2020-09-25 04:23:52,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-09-25 04:23:52,506 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 04:23:52,506 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 04:23:52,507 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-25 04:23:52,507 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 04:23:52,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 04:23:52,507 INFO L82 PathProgramCache]: Analyzing trace with hash 1232245930, now seen corresponding path program 4 times [2020-09-25 04:23:52,508 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 04:23:52,508 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1851427605] [2020-09-25 04:23:52,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 04:23:52,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:23:52,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:23:52,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:23:56,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:23:57,547 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:23:57,548 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 123 [2020-09-25 04:23:57,548 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 04:23:57,548 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-09-25 04:23:57,548 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:23:57,548 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:23:57,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-09-25 04:23:57,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-09-25 04:23:57,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-09-25 04:23:57,549 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 04:23:57,672 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 04:23:57,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:23:57,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:23:57,679 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:23:57,679 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 04:23:57,679 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 04:23:57,679 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-25 04:23:57,679 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:23:57,680 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:23:57,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 04:23:57,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 04:23:57,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 04:23:57,680 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 04:23:57,682 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2020-09-25 04:23:57,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:23:57,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:23:57,688 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:23:57,689 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-09-25 04:23:57,689 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 04:23:57,689 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-25 04:23:57,689 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:23:57,689 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:23:57,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 04:23:57,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-25 04:23:57,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 04:23:57,690 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 04:23:57,712 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-09-25 04:23:57,712 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1851427605] [2020-09-25 04:23:57,712 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 04:23:57,713 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-09-25 04:23:57,713 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754594320] [2020-09-25 04:23:57,713 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-25 04:23:57,714 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 04:23:57,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-25 04:23:57,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2020-09-25 04:23:57,714 INFO L87 Difference]: Start difference. First operand 115 states and 116 transitions. Second operand 14 states. [2020-09-25 04:23:58,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 04:23:58,135 INFO L93 Difference]: Finished difference Result 182 states and 184 transitions. [2020-09-25 04:23:58,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-25 04:23:58,136 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 114 [2020-09-25 04:23:58,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 04:23:58,138 INFO L225 Difference]: With dead ends: 182 [2020-09-25 04:23:58,138 INFO L226 Difference]: Without dead ends: 133 [2020-09-25 04:23:58,139 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=180, Invalid=372, Unknown=0, NotChecked=0, Total=552 [2020-09-25 04:23:58,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-09-25 04:23:58,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 125. [2020-09-25 04:23:58,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-09-25 04:23:58,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 126 transitions. [2020-09-25 04:23:58,152 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 126 transitions. Word has length 114 [2020-09-25 04:23:58,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 04:23:58,153 INFO L479 AbstractCegarLoop]: Abstraction has 125 states and 126 transitions. [2020-09-25 04:23:58,153 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-25 04:23:58,153 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 126 transitions. [2020-09-25 04:23:58,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-09-25 04:23:58,155 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 04:23:58,156 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 04:23:58,156 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-25 04:23:58,156 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 04:23:58,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 04:23:58,157 INFO L82 PathProgramCache]: Analyzing trace with hash -1537393404, now seen corresponding path program 5 times [2020-09-25 04:23:58,157 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 04:23:58,158 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [235676170] [2020-09-25 04:23:58,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 04:23:58,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:23:58,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:23:58,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:24:02,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:24:03,197 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:24:03,198 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 133 [2020-09-25 04:24:03,198 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 04:24:03,198 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-09-25 04:24:03,198 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:24:03,198 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:24:03,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-25 04:24:03,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 84 [2020-09-25 04:24:03,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-09-25 04:24:03,199 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 04:24:03,373 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 04:24:03,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:24:03,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:24:03,380 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:24:03,381 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 04:24:03,381 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 04:24:03,381 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-25 04:24:03,382 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:24:03,382 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:24:03,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 04:24:03,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 04:24:03,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 04:24:03,383 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 04:24:03,385 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2020-09-25 04:24:03,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:24:03,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:24:03,395 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:24:03,395 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-09-25 04:24:03,396 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 04:24:03,396 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-25 04:24:03,396 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:24:03,396 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:24:03,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 04:24:03,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-25 04:24:03,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 04:24:03,397 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 04:24:03,432 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2020-09-25 04:24:03,433 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [235676170] [2020-09-25 04:24:03,433 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 04:24:03,434 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-09-25 04:24:03,434 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160772213] [2020-09-25 04:24:03,434 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-25 04:24:03,434 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 04:24:03,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-25 04:24:03,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2020-09-25 04:24:03,436 INFO L87 Difference]: Start difference. First operand 125 states and 126 transitions. Second operand 12 states. [2020-09-25 04:24:03,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 04:24:03,856 INFO L93 Difference]: Finished difference Result 150 states and 151 transitions. [2020-09-25 04:24:03,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-25 04:24:03,856 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 124 [2020-09-25 04:24:03,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 04:24:03,858 INFO L225 Difference]: With dead ends: 150 [2020-09-25 04:24:03,858 INFO L226 Difference]: Without dead ends: 134 [2020-09-25 04:24:03,859 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2020-09-25 04:24:03,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-09-25 04:24:03,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 131. [2020-09-25 04:24:03,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-09-25 04:24:03,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 132 transitions. [2020-09-25 04:24:03,866 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 132 transitions. Word has length 124 [2020-09-25 04:24:03,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 04:24:03,866 INFO L479 AbstractCegarLoop]: Abstraction has 131 states and 132 transitions. [2020-09-25 04:24:03,866 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-25 04:24:03,866 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 132 transitions. [2020-09-25 04:24:03,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-09-25 04:24:03,868 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 04:24:03,868 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 04:24:03,869 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-09-25 04:24:03,869 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 04:24:03,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 04:24:03,869 INFO L82 PathProgramCache]: Analyzing trace with hash 749658908, now seen corresponding path program 6 times [2020-09-25 04:24:03,870 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 04:24:03,870 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [292166892] [2020-09-25 04:24:03,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 04:24:03,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:24:03,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:24:04,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking...