/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=SMALLESTAMONGWIDE --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/eca-rers2012/Problem02_label07.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 11:15:25,679 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 11:15:25,683 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 11:15:25,710 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 11:15:25,710 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 11:15:25,712 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 11:15:25,713 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 11:15:25,715 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 11:15:25,717 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 11:15:25,718 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 11:15:25,719 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 11:15:25,721 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 11:15:25,721 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 11:15:25,722 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 11:15:25,724 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 11:15:25,725 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 11:15:25,726 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 11:15:25,727 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 11:15:25,729 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 11:15:25,731 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 11:15:25,733 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 11:15:25,735 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 11:15:25,736 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 11:15:25,737 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 11:15:25,740 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 11:15:25,740 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 11:15:25,741 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 11:15:25,742 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 11:15:25,742 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 11:15:25,743 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 11:15:25,744 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 11:15:25,745 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 11:15:25,746 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 11:15:25,747 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 11:15:25,748 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 11:15:25,748 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 11:15:25,749 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 11:15:25,749 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 11:15:25,750 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 11:15:25,751 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 11:15:25,752 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 11:15:25,753 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 11:15:25,780 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 11:15:25,781 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 11:15:25,782 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 11:15:25,782 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 11:15:25,782 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 11:15:25,783 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 11:15:25,783 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 11:15:25,783 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 11:15:25,783 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 11:15:25,783 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 11:15:25,784 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 11:15:25,784 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 11:15:25,784 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 11:15:25,784 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 11:15:25,784 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 11:15:25,785 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 11:15:25,785 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 11:15:25,785 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 11:15:25,785 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 11:15:25,786 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 11:15:25,786 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 11:15:25,786 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 11:15:25,786 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 11:15:25,787 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 11:15:25,787 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 11:15:25,787 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 11:15:25,787 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 11:15:25,787 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 11:15:25,788 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 11:15:25,788 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=SMALLESTAMONGWIDE;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=SMALLESTAMONGWIDE;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=SMALLESTAMONGWIDE;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=SMALLESTAMONGWIDE;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=SMALLESTAMONGWIDE;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=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true; [2020-09-25 11:15:26,244 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 11:15:26,263 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 11:15:26,267 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 11:15:26,269 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 11:15:26,270 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 11:15:26,271 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem02_label07.c [2020-09-25 11:15:26,352 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4350e898d/9abca567d9ad4d598f241e5e8692cc8e/FLAG19f46f7af [2020-09-25 11:15:27,031 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 11:15:27,032 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem02_label07.c [2020-09-25 11:15:27,045 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4350e898d/9abca567d9ad4d598f241e5e8692cc8e/FLAG19f46f7af [2020-09-25 11:15:27,265 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4350e898d/9abca567d9ad4d598f241e5e8692cc8e [2020-09-25 11:15:27,278 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 11:15:27,284 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 11:15:27,287 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 11:15:27,288 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 11:15:27,292 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 11:15:27,293 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 11:15:27" (1/1) ... [2020-09-25 11:15:27,298 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@47591dab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:15:27, skipping insertion in model container [2020-09-25 11:15:27,299 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 11:15:27" (1/1) ... [2020-09-25 11:15:27,309 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 11:15:27,376 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 11:15:27,937 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 11:15:27,951 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 11:15:28,053 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 11:15:28,073 INFO L208 MainTranslator]: Completed translation [2020-09-25 11:15:28,075 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:15:28 WrapperNode [2020-09-25 11:15:28,076 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 11:15:28,077 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 11:15:28,078 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 11:15:28,078 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 11:15:28,099 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:15:28" (1/1) ... [2020-09-25 11:15:28,100 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:15:28" (1/1) ... [2020-09-25 11:15:28,121 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:15:28" (1/1) ... [2020-09-25 11:15:28,122 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:15:28" (1/1) ... [2020-09-25 11:15:28,174 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:15:28" (1/1) ... [2020-09-25 11:15:28,194 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:15:28" (1/1) ... [2020-09-25 11:15:28,199 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:15:28" (1/1) ... [2020-09-25 11:15:28,207 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 11:15:28,207 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 11:15:28,207 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 11:15:28,208 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 11:15:28,211 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:15:28" (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 11:15:28,291 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 11:15:28,292 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 11:15:28,292 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-09-25 11:15:28,292 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 11:15:28,293 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-09-25 11:15:28,293 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 11:15:28,293 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-25 11:15:28,294 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-09-25 11:15:28,294 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 11:15:28,294 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 11:15:28,294 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 11:15:29,782 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 11:15:29,782 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-25 11:15:29,791 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 11:15:29 BoogieIcfgContainer [2020-09-25 11:15:29,792 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 11:15:29,793 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 11:15:29,793 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 11:15:29,797 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 11:15:29,798 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 11:15:27" (1/3) ... [2020-09-25 11:15:29,799 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d3905fb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 11:15:29, skipping insertion in model container [2020-09-25 11:15:29,799 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:15:28" (2/3) ... [2020-09-25 11:15:29,800 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d3905fb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 11:15:29, skipping insertion in model container [2020-09-25 11:15:29,800 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 11:15:29" (3/3) ... [2020-09-25 11:15:29,802 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem02_label07.c [2020-09-25 11:15:29,815 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 11:15:29,835 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 11:15:29,859 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 11:15:29,907 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 11:15:29,907 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 11:15:29,907 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 11:15:29,907 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 11:15:29,908 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 11:15:29,908 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 11:15:29,908 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 11:15:29,908 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 11:15:29,949 INFO L276 IsEmpty]: Start isEmpty. Operand 527 states. [2020-09-25 11:15:29,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2020-09-25 11:15:29,974 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:15:29,976 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 11:15:29,976 INFO L427 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:15:29,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:15:29,983 INFO L82 PathProgramCache]: Analyzing trace with hash 228287402, now seen corresponding path program 1 times [2020-09-25 11:15:29,992 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:15:29,992 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1438333178] [2020-09-25 11:15:29,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:15:30,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:15:30,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:15:30,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:15:31,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:15:31,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:15:32,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:15:33,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:15:34,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:15:35,283 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:15:35,284 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 174 [2020-09-25 11:15:35,284 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-25 11:15:35,284 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-09-25 11:15:35,288 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:15:35,288 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:15:35,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 11:15:35,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-25 11:15:35,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 154 [2020-09-25 11:15:35,289 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-09-25 11:15:35,501 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 11:15:35,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:15:35,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:15:35,539 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:15:35,540 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 11:15:35,540 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:15:35,540 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 29 [2020-09-25 11:15:35,541 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:15:35,541 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:15:35,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 11:15:35,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:15:35,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-09-25 11:15:35,542 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:15:35,625 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 11:15:35,626 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1438333178] [2020-09-25 11:15:35,629 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 11:15:35,629 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-25 11:15:35,630 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595396213] [2020-09-25 11:15:35,638 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 11:15:35,639 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 11:15:35,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 11:15:35,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-25 11:15:35,665 INFO L87 Difference]: Start difference. First operand 527 states. Second operand 5 states. [2020-09-25 11:15:38,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 11:15:38,868 INFO L93 Difference]: Finished difference Result 1420 states and 2015 transitions. [2020-09-25 11:15:38,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-25 11:15:38,871 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 165 [2020-09-25 11:15:38,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 11:15:38,899 INFO L225 Difference]: With dead ends: 1420 [2020-09-25 11:15:38,899 INFO L226 Difference]: Without dead ends: 837 [2020-09-25 11:15:38,913 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-09-25 11:15:38,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 837 states. [2020-09-25 11:15:39,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 837 to 774. [2020-09-25 11:15:39,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 774 states. [2020-09-25 11:15:39,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 774 states to 774 states and 946 transitions. [2020-09-25 11:15:39,035 INFO L78 Accepts]: Start accepts. Automaton has 774 states and 946 transitions. Word has length 165 [2020-09-25 11:15:39,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 11:15:39,036 INFO L479 AbstractCegarLoop]: Abstraction has 774 states and 946 transitions. [2020-09-25 11:15:39,036 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 11:15:39,037 INFO L276 IsEmpty]: Start isEmpty. Operand 774 states and 946 transitions. [2020-09-25 11:15:39,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2020-09-25 11:15:39,047 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:15:39,048 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:15:39,048 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 11:15:39,048 INFO L427 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:15:39,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:15:39,049 INFO L82 PathProgramCache]: Analyzing trace with hash 938728200, now seen corresponding path program 1 times [2020-09-25 11:15:39,049 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:15:39,050 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1513315357] [2020-09-25 11:15:39,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:15:39,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:15:39,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:15:39,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:15:39,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:15:40,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:15:40,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:15:43,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:15:43,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:15:44,102 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:15:44,102 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 198 [2020-09-25 11:15:44,103 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-25 11:15:44,103 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-09-25 11:15:44,103 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:15:44,103 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:15:44,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 11:15:44,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 44 [2020-09-25 11:15:44,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 153 [2020-09-25 11:15:44,104 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:15:44,260 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 11:15:44,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:15:44,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:15:44,276 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:15:44,276 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 11:15:44,277 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:15:44,277 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-09-25 11:15:44,277 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:15:44,277 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:15:44,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 11:15:44,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:15:44,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 11:15:44,278 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:15:44,296 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-25 11:15:44,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:15:44,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:15:44,319 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:15:44,319 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-09-25 11:15:44,319 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:15:44,320 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-09-25 11:15:44,320 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:15:44,320 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:15:44,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 11:15:44,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:15:44,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-25 11:15:44,321 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:15:44,372 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 11:15:44,373 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1513315357] [2020-09-25 11:15:44,373 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 11:15:44,374 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-25 11:15:44,374 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191531402] [2020-09-25 11:15:44,376 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 11:15:44,377 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 11:15:44,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 11:15:44,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-25 11:15:44,378 INFO L87 Difference]: Start difference. First operand 774 states and 946 transitions. Second operand 5 states. [2020-09-25 11:15:46,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 11:15:46,369 INFO L93 Difference]: Finished difference Result 1990 states and 2530 transitions. [2020-09-25 11:15:46,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-25 11:15:46,369 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 187 [2020-09-25 11:15:46,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 11:15:46,380 INFO L225 Difference]: With dead ends: 1990 [2020-09-25 11:15:46,380 INFO L226 Difference]: Without dead ends: 1238 [2020-09-25 11:15:46,385 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-09-25 11:15:46,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1238 states. [2020-09-25 11:15:46,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1238 to 1228. [2020-09-25 11:15:46,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1228 states. [2020-09-25 11:15:46,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1228 states to 1228 states and 1542 transitions. [2020-09-25 11:15:46,446 INFO L78 Accepts]: Start accepts. Automaton has 1228 states and 1542 transitions. Word has length 187 [2020-09-25 11:15:46,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 11:15:46,447 INFO L479 AbstractCegarLoop]: Abstraction has 1228 states and 1542 transitions. [2020-09-25 11:15:46,447 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 11:15:46,448 INFO L276 IsEmpty]: Start isEmpty. Operand 1228 states and 1542 transitions. [2020-09-25 11:15:46,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2020-09-25 11:15:46,456 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:15:46,457 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:15:46,457 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 11:15:46,457 INFO L427 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:15:46,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:15:46,458 INFO L82 PathProgramCache]: Analyzing trace with hash 817937001, now seen corresponding path program 1 times [2020-09-25 11:15:46,458 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:15:46,459 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1751339550] [2020-09-25 11:15:46,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:15:46,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:15:46,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:15:46,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:15:46,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:15:47,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:15:48,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:15:51,500 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:15:51,501 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 242 [2020-09-25 11:15:51,501 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-25 11:15:51,501 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-09-25 11:15:51,501 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:15:51,502 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:15:51,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-09-25 11:15:51,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-09-25 11:15:51,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 176 [2020-09-25 11:15:51,504 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-09-25 11:15:51,813 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 11:15:51,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:15:51,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:15:51,848 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:15:51,849 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 11:15:51,849 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:15:51,850 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-09-25 11:15:51,850 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:15:51,850 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:15:51,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 11:15:51,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:15:51,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-09-25 11:15:51,852 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:15:51,880 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-25 11:15:51,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:15:51,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:15:51,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:15:52,000 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:15:52,001 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-09-25 11:15:52,001 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 11:15:52,002 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 109 [2020-09-25 11:15:52,002 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:15:52,003 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:15:52,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-25 11:15:52,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:15:52,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-09-25 11:15:52,004 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:15:52,019 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2020-09-25 11:15:52,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:15:52,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:15:52,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:15:52,274 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:15:52,274 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-09-25 11:15:52,275 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 11:15:52,275 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 247 [2020-09-25 11:15:52,276 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:15:52,276 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:15:52,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 11:15:52,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-25 11:15:52,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-09-25 11:15:52,277 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:15:52,852 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 51 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-25 11:15:52,853 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1751339550] [2020-09-25 11:15:52,853 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 11:15:52,854 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-09-25 11:15:52,854 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727773679] [2020-09-25 11:15:52,855 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-25 11:15:52,855 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 11:15:52,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-25 11:15:52,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-09-25 11:15:52,856 INFO L87 Difference]: Start difference. First operand 1228 states and 1542 transitions. Second operand 12 states. [2020-09-25 11:15:53,521 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 59 [2020-09-25 11:15:54,874 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 64 [2020-09-25 11:15:57,266 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 61 [2020-09-25 11:15:57,530 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 64 [2020-09-25 11:15:58,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 11:15:58,292 INFO L93 Difference]: Finished difference Result 3640 states and 4969 transitions. [2020-09-25 11:15:58,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-25 11:15:58,293 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 229 [2020-09-25 11:15:58,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 11:15:58,309 INFO L225 Difference]: With dead ends: 3640 [2020-09-25 11:15:58,309 INFO L226 Difference]: Without dead ends: 2225 [2020-09-25 11:15:58,318 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=193, Invalid=407, Unknown=0, NotChecked=0, Total=600 [2020-09-25 11:15:58,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2225 states. [2020-09-25 11:15:58,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2225 to 2215. [2020-09-25 11:15:58,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2215 states. [2020-09-25 11:15:58,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2215 states to 2215 states and 2742 transitions. [2020-09-25 11:15:58,394 INFO L78 Accepts]: Start accepts. Automaton has 2215 states and 2742 transitions. Word has length 229 [2020-09-25 11:15:58,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 11:15:58,394 INFO L479 AbstractCegarLoop]: Abstraction has 2215 states and 2742 transitions. [2020-09-25 11:15:58,426 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-25 11:15:58,427 INFO L276 IsEmpty]: Start isEmpty. Operand 2215 states and 2742 transitions. [2020-09-25 11:15:58,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 307 [2020-09-25 11:15:58,446 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:15:58,446 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:15:58,447 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 11:15:58,447 INFO L427 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:15:58,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:15:58,449 INFO L82 PathProgramCache]: Analyzing trace with hash 865061289, now seen corresponding path program 1 times [2020-09-25 11:15:58,450 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:15:58,450 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [408634577] [2020-09-25 11:15:58,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:15:58,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:15:58,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:15:58,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:15:58,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:15:59,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:15:59,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:15:59,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:16:00,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:16:00,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:16:01,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:16:01,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:16:03,513 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:16:03,513 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 321 [2020-09-25 11:16:03,513 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-09-25 11:16:03,513 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-09-25 11:16:03,514 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:16:03,514 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:16:03,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 11:16:03,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 79 [2020-09-25 11:16:03,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 241 [2020-09-25 11:16:03,515 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:16:03,650 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 11:16:03,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:16:03,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:16:03,667 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:16:03,668 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 11:16:03,668 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:16:03,669 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-09-25 11:16:03,669 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:16:03,669 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:16:03,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 11:16:03,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:16:03,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 11:16:03,671 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:16:03,740 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-25 11:16:03,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:16:03,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:16:03,751 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:16:03,751 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-09-25 11:16:03,752 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:16:03,752 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-25 11:16:03,752 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:16:03,752 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:16:03,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 11:16:03,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:16:03,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 11:16:03,753 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:16:03,757 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2020-09-25 11:16:03,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:16:03,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:16:03,797 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:16:03,798 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-09-25 11:16:03,798 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:16:03,798 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 35 [2020-09-25 11:16:03,799 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:16:03,799 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:16:03,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 11:16:03,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:16:03,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-09-25 11:16:03,801 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:16:03,811 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2020-09-25 11:16:03,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:16:03,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:16:03,941 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:16:03,941 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-09-25 11:16:03,941 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:16:03,942 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 109 [2020-09-25 11:16:03,942 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:16:03,942 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:16:03,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 11:16:03,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-25 11:16:03,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-09-25 11:16:03,943 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:16:04,121 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 80 proven. 73 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-09-25 11:16:04,121 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [408634577] [2020-09-25 11:16:04,122 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 11:16:04,122 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-09-25 11:16:04,122 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667810062] [2020-09-25 11:16:04,123 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-25 11:16:04,123 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 11:16:04,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-25 11:16:04,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-09-25 11:16:04,124 INFO L87 Difference]: Start difference. First operand 2215 states and 2742 transitions. Second operand 6 states. [2020-09-25 11:16:06,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 11:16:06,343 INFO L93 Difference]: Finished difference Result 5868 states and 7535 transitions. [2020-09-25 11:16:06,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-25 11:16:06,344 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 306 [2020-09-25 11:16:06,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 11:16:06,368 INFO L225 Difference]: With dead ends: 5868 [2020-09-25 11:16:06,369 INFO L226 Difference]: Without dead ends: 3675 [2020-09-25 11:16:06,382 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-09-25 11:16:06,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3675 states. [2020-09-25 11:16:06,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3675 to 3533. [2020-09-25 11:16:06,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3533 states. [2020-09-25 11:16:06,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3533 states to 3533 states and 4501 transitions. [2020-09-25 11:16:06,554 INFO L78 Accepts]: Start accepts. Automaton has 3533 states and 4501 transitions. Word has length 306 [2020-09-25 11:16:06,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 11:16:06,554 INFO L479 AbstractCegarLoop]: Abstraction has 3533 states and 4501 transitions. [2020-09-25 11:16:06,555 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-25 11:16:06,555 INFO L276 IsEmpty]: Start isEmpty. Operand 3533 states and 4501 transitions. [2020-09-25 11:16:06,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 320 [2020-09-25 11:16:06,581 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:16:06,582 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:16:06,582 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-25 11:16:06,582 INFO L427 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:16:06,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:16:06,583 INFO L82 PathProgramCache]: Analyzing trace with hash -93889228, now seen corresponding path program 1 times [2020-09-25 11:16:06,585 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:16:06,586 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [520708983] [2020-09-25 11:16:06,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:16:06,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:16:06,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:16:06,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:16:06,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:16:06,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:16:07,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:16:07,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:16:11,633 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:16:11,634 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 334 [2020-09-25 11:16:11,634 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-09-25 11:16:11,634 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-09-25 11:16:11,634 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:16:11,634 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:16:11,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 11:16:11,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 95 [2020-09-25 11:16:11,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 86 [2020-09-25 11:16:11,635 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 11:16:11,749 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 11:16:11,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:16:11,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:16:11,766 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:16:11,767 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 11:16:11,767 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:16:11,768 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-09-25 11:16:11,768 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:16:11,768 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:16:11,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 11:16:11,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:16:11,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 11:16:11,770 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:16:11,794 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-25 11:16:11,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:16:11,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:16:11,815 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:16:11,815 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 11:16:11,816 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:16:11,816 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-09-25 11:16:11,816 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:16:11,816 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:16:11,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 11:16:11,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:16:11,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 11:16:11,817 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:16:11,823 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-09-25 11:16:11,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:16:11,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:16:11,886 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:16:11,887 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-09-25 11:16:11,887 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:16:11,887 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 52 [2020-09-25 11:16:11,888 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:16:11,888 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:16:11,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 11:16:11,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:16:11,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-09-25 11:16:11,890 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:16:11,908 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2020-09-25 11:16:11,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:16:11,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:16:12,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:16:12,325 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:16:12,325 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-09-25 11:16:12,325 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 11:16:12,326 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 388 [2020-09-25 11:16:12,326 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:16:12,326 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:16:12,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 11:16:12,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-25 11:16:12,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-09-25 11:16:12,327 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:16:12,625 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 189 proven. 2 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-09-25 11:16:12,626 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [520708983] [2020-09-25 11:16:12,626 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 11:16:12,627 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-25 11:16:12,627 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451644584] [2020-09-25 11:16:12,629 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-25 11:16:12,629 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 11:16:12,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-25 11:16:12,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-09-25 11:16:12,630 INFO L87 Difference]: Start difference. First operand 3533 states and 4501 transitions. Second operand 7 states.