/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=0.6 --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_label48.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 06:45:48,671 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 06:45:48,675 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 06:45:48,719 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 06:45:48,720 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 06:45:48,727 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 06:45:48,730 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 06:45:48,734 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 06:45:48,737 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 06:45:48,741 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 06:45:48,742 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 06:45:48,743 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 06:45:48,743 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 06:45:48,746 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 06:45:48,749 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 06:45:48,751 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 06:45:48,753 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 06:45:48,754 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 06:45:48,756 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 06:45:48,766 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 06:45:48,768 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 06:45:48,769 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 06:45:48,771 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 06:45:48,772 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 06:45:48,789 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 06:45:48,790 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 06:45:48,790 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 06:45:48,791 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 06:45:48,791 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 06:45:48,792 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 06:45:48,793 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 06:45:48,794 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 06:45:48,798 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 06:45:48,798 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 06:45:48,802 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 06:45:48,802 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 06:45:48,803 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 06:45:48,803 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 06:45:48,804 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 06:45:48,805 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 06:45:48,806 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 06:45:48,807 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 06:45:48,846 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 06:45:48,847 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 06:45:48,848 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 06:45:48,848 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 06:45:48,848 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 06:45:48,849 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 06:45:48,849 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 06:45:48,849 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 06:45:48,849 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 06:45:48,849 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 06:45:48,850 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 06:45:48,850 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 06:45:48,850 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 06:45:48,850 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 06:45:48,850 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 06:45:48,851 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 06:45:48,851 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 06:45:48,851 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 06:45:48,851 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 06:45:48,851 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 06:45:48,852 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 06:45:48,852 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 06:45:48,852 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 06:45:48,852 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 06:45:48,852 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 06:45:48,853 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 06:45:48,853 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 06:45:48,853 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 06:45:48,853 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 06:45:48,853 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=0.6;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=0.6;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=0.6;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=0.6;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=0.6;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=0.6;log-additional-information=true; [2020-09-25 06:45:49,339 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 06:45:49,365 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 06:45:49,370 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 06:45:49,371 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 06:45:49,373 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 06:45:49,374 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem02_label48.c [2020-09-25 06:45:49,466 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3cc63d52d/b4c134ce76834edf99ffa07bc9d18a10/FLAG09802ecfc [2020-09-25 06:45:50,158 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 06:45:50,159 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem02_label48.c [2020-09-25 06:45:50,189 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3cc63d52d/b4c134ce76834edf99ffa07bc9d18a10/FLAG09802ecfc [2020-09-25 06:45:50,378 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3cc63d52d/b4c134ce76834edf99ffa07bc9d18a10 [2020-09-25 06:45:50,394 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 06:45:50,403 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 06:45:50,407 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 06:45:50,407 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 06:45:50,411 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 06:45:50,413 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 06:45:50" (1/1) ... [2020-09-25 06:45:50,418 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@321fecde and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 06:45:50, skipping insertion in model container [2020-09-25 06:45:50,419 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 06:45:50" (1/1) ... [2020-09-25 06:45:50,429 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 06:45:50,510 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 06:45:50,945 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 06:45:50,956 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 06:45:51,205 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 06:45:51,225 INFO L208 MainTranslator]: Completed translation [2020-09-25 06:45:51,226 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 06:45:51 WrapperNode [2020-09-25 06:45:51,226 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 06:45:51,227 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 06:45:51,227 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 06:45:51,228 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 06:45:51,244 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 06:45:51" (1/1) ... [2020-09-25 06:45:51,244 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 06:45:51" (1/1) ... [2020-09-25 06:45:51,264 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 06:45:51" (1/1) ... [2020-09-25 06:45:51,265 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 06:45:51" (1/1) ... [2020-09-25 06:45:51,306 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 06:45:51" (1/1) ... [2020-09-25 06:45:51,325 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 06:45:51" (1/1) ... [2020-09-25 06:45:51,333 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 06:45:51" (1/1) ... [2020-09-25 06:45:51,342 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 06:45:51,342 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 06:45:51,343 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 06:45:51,343 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 06:45:51,344 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 06:45:51" (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 06:45:51,438 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 06:45:51,438 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 06:45:51,439 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-09-25 06:45:51,439 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 06:45:51,439 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-09-25 06:45:51,439 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 06:45:51,439 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-25 06:45:51,440 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-09-25 06:45:51,440 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 06:45:51,440 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 06:45:51,440 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 06:45:52,771 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 06:45:52,771 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-25 06:45:52,780 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 06:45:52 BoogieIcfgContainer [2020-09-25 06:45:52,781 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 06:45:52,782 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 06:45:52,782 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 06:45:52,787 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 06:45:52,787 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 06:45:50" (1/3) ... [2020-09-25 06:45:52,788 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67cce9eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 06:45:52, skipping insertion in model container [2020-09-25 06:45:52,788 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 06:45:51" (2/3) ... [2020-09-25 06:45:52,789 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67cce9eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 06:45:52, skipping insertion in model container [2020-09-25 06:45:52,789 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 06:45:52" (3/3) ... [2020-09-25 06:45:52,791 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem02_label48.c [2020-09-25 06:45:52,803 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 06:45:52,815 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 06:45:52,838 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 06:45:52,874 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 06:45:52,874 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 06:45:52,875 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 06:45:52,875 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 06:45:52,875 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 06:45:52,875 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 06:45:52,875 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 06:45:52,875 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 06:45:52,908 INFO L276 IsEmpty]: Start isEmpty. Operand 527 states. [2020-09-25 06:45:52,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2020-09-25 06:45:52,934 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 06:45:52,935 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] [2020-09-25 06:45:52,936 INFO L427 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 06:45:52,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 06:45:52,944 INFO L82 PathProgramCache]: Analyzing trace with hash 192415938, now seen corresponding path program 1 times [2020-09-25 06:45:52,956 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 06:45:52,956 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1121940282] [2020-09-25 06:45:52,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 06:45:53,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:45:53,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:45:53,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:45:54,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:45:54,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:45:55,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:45:56,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:45:56,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:45:58,237 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:45:58,238 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 172 [2020-09-25 06:45:58,238 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-25 06:45:58,239 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-09-25 06:45:58,243 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:45:58,244 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:45:58,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 06:45:58,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-09-25 06:45:58,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 153 [2020-09-25 06:45:58,245 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-09-25 06:45:58,529 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 06:45:58,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:45:58,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:45:58,577 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:45:58,577 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 06:45:58,577 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 06:45:58,577 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 37 [2020-09-25 06:45:58,578 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:45:58,579 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:45:58,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 06:45:58,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 06:45:58,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-09-25 06:45:58,580 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-25 06:45:58,653 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 06:45:58,655 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1121940282] [2020-09-25 06:45:58,657 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 06:45:58,658 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-25 06:45:58,660 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933022250] [2020-09-25 06:45:58,669 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-25 06:45:58,669 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 06:45:58,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-25 06:45:58,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 06:45:58,692 INFO L87 Difference]: Start difference. First operand 527 states. Second operand 4 states. [2020-09-25 06:46:01,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 06:46:01,017 INFO L93 Difference]: Finished difference Result 1386 states and 1837 transitions. [2020-09-25 06:46:01,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-25 06:46:01,022 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 163 [2020-09-25 06:46:01,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 06:46:01,062 INFO L225 Difference]: With dead ends: 1386 [2020-09-25 06:46:01,062 INFO L226 Difference]: Without dead ends: 787 [2020-09-25 06:46:01,074 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-25 06:46:01,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 787 states. [2020-09-25 06:46:01,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 787 to 733. [2020-09-25 06:46:01,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 733 states. [2020-09-25 06:46:01,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 733 states to 733 states and 884 transitions. [2020-09-25 06:46:01,190 INFO L78 Accepts]: Start accepts. Automaton has 733 states and 884 transitions. Word has length 163 [2020-09-25 06:46:01,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 06:46:01,191 INFO L479 AbstractCegarLoop]: Abstraction has 733 states and 884 transitions. [2020-09-25 06:46:01,192 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-25 06:46:01,192 INFO L276 IsEmpty]: Start isEmpty. Operand 733 states and 884 transitions. [2020-09-25 06:46:01,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2020-09-25 06:46:01,209 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 06:46:01,209 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 06:46:01,209 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 06:46:01,210 INFO L427 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 06:46:01,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 06:46:01,210 INFO L82 PathProgramCache]: Analyzing trace with hash 157617646, now seen corresponding path program 1 times [2020-09-25 06:46:01,210 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 06:46:01,210 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1824123460] [2020-09-25 06:46:01,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 06:46:01,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:46:01,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:46:01,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:46:01,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:46:01,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:46:02,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:46:06,311 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:46:06,311 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 192 [2020-09-25 06:46:06,311 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-25 06:46:06,312 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-09-25 06:46:06,313 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:46:06,313 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:46:06,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 06:46:06,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 42 [2020-09-25 06:46:06,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 149 [2020-09-25 06:46:06,318 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-09-25 06:46:06,437 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 06:46:06,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:46:06,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:46:06,454 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:46:06,454 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 06:46:06,455 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 06:46:06,455 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-09-25 06:46:06,455 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:46:06,455 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:46:06,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 06:46:06,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 06:46:06,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 06:46:06,456 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 06:46:06,476 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-25 06:46:06,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:46:06,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:46:06,495 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:46:06,495 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-09-25 06:46:06,495 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 06:46:06,495 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-09-25 06:46:06,496 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:46:06,496 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:46:06,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 06:46:06,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 06:46:06,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 06:46:06,497 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 06:46:06,543 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 06:46:06,544 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1824123460] [2020-09-25 06:46:06,544 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 06:46:06,544 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-25 06:46:06,544 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304164862] [2020-09-25 06:46:06,547 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 06:46:06,547 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 06:46:06,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 06:46:06,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-25 06:46:06,548 INFO L87 Difference]: Start difference. First operand 733 states and 884 transitions. Second operand 5 states. [2020-09-25 06:46:08,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 06:46:08,896 INFO L93 Difference]: Finished difference Result 1900 states and 2381 transitions. [2020-09-25 06:46:08,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-25 06:46:08,897 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 181 [2020-09-25 06:46:08,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 06:46:08,907 INFO L225 Difference]: With dead ends: 1900 [2020-09-25 06:46:08,907 INFO L226 Difference]: Without dead ends: 1189 [2020-09-25 06:46:08,910 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-09-25 06:46:08,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1189 states. [2020-09-25 06:46:08,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1189 to 1055. [2020-09-25 06:46:08,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1055 states. [2020-09-25 06:46:08,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1055 states to 1055 states and 1308 transitions. [2020-09-25 06:46:08,966 INFO L78 Accepts]: Start accepts. Automaton has 1055 states and 1308 transitions. Word has length 181 [2020-09-25 06:46:08,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 06:46:08,967 INFO L479 AbstractCegarLoop]: Abstraction has 1055 states and 1308 transitions. [2020-09-25 06:46:08,967 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 06:46:08,967 INFO L276 IsEmpty]: Start isEmpty. Operand 1055 states and 1308 transitions. [2020-09-25 06:46:08,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2020-09-25 06:46:08,973 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 06:46:08,973 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 06:46:08,974 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 06:46:08,974 INFO L427 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 06:46:08,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 06:46:08,974 INFO L82 PathProgramCache]: Analyzing trace with hash -1809000221, now seen corresponding path program 1 times [2020-09-25 06:46:08,974 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 06:46:08,975 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [115451776] [2020-09-25 06:46:08,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 06:46:09,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:46:09,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:46:09,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:46:09,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:46:10,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:46:11,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:46:12,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:46:12,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:46:13,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:46:14,027 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:46:14,027 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 198 [2020-09-25 06:46:14,027 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-25 06:46:14,027 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-09-25 06:46:14,028 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:46:14,028 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:46:14,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-25 06:46:14,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 45 [2020-09-25 06:46:14,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 96 [2020-09-25 06:46:14,031 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-09-25 06:46:14,255 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 06:46:14,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:46:14,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:46:14,275 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:46:14,275 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 06:46:14,275 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 06:46:14,276 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-09-25 06:46:14,276 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:46:14,276 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:46:14,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 06:46:14,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 06:46:14,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 06:46:14,277 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 06:46:14,296 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-25 06:46:14,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:46:14,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:46:14,348 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:46:14,348 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-09-25 06:46:14,349 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 06:46:14,349 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 44 [2020-09-25 06:46:14,350 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:46:14,350 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:46:14,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-25 06:46:14,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 06:46:14,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-09-25 06:46:14,351 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 06:46:14,523 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 06:46:14,523 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [115451776] [2020-09-25 06:46:14,524 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 06:46:14,524 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-25 06:46:14,524 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156337015] [2020-09-25 06:46:14,525 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-25 06:46:14,526 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 06:46:14,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-25 06:46:14,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-09-25 06:46:14,526 INFO L87 Difference]: Start difference. First operand 1055 states and 1308 transitions. Second operand 8 states. [2020-09-25 06:46:15,362 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2020-09-25 06:46:18,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 06:46:18,634 INFO L93 Difference]: Finished difference Result 3284 states and 4426 transitions. [2020-09-25 06:46:18,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-25 06:46:18,635 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 187 [2020-09-25 06:46:18,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 06:46:18,653 INFO L225 Difference]: With dead ends: 3284 [2020-09-25 06:46:18,657 INFO L226 Difference]: Without dead ends: 2000 [2020-09-25 06:46:18,666 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2020-09-25 06:46:18,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2000 states. [2020-09-25 06:46:18,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2000 to 1950. [2020-09-25 06:46:18,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1950 states. [2020-09-25 06:46:18,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1950 states to 1950 states and 2318 transitions. [2020-09-25 06:46:18,751 INFO L78 Accepts]: Start accepts. Automaton has 1950 states and 2318 transitions. Word has length 187 [2020-09-25 06:46:18,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 06:46:18,752 INFO L479 AbstractCegarLoop]: Abstraction has 1950 states and 2318 transitions. [2020-09-25 06:46:18,752 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-25 06:46:18,752 INFO L276 IsEmpty]: Start isEmpty. Operand 1950 states and 2318 transitions. [2020-09-25 06:46:18,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2020-09-25 06:46:18,762 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 06:46:18,762 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:46:18,763 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 06:46:18,763 INFO L427 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 06:46:18,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 06:46:18,771 INFO L82 PathProgramCache]: Analyzing trace with hash 559246375, now seen corresponding path program 1 times [2020-09-25 06:46:18,772 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 06:46:18,772 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [33216766] [2020-09-25 06:46:18,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 06:46:18,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:46:18,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:46:18,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:46:18,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:46:19,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:46:23,800 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:46:23,800 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 208 [2020-09-25 06:46:23,800 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-25 06:46:23,800 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-09-25 06:46:23,801 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:46:23,801 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:46:23,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-09-25 06:46:23,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-09-25 06:46:23,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 136 [2020-09-25 06:46:23,802 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 06:46:24,025 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 06:46:24,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:46:24,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:46:24,067 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:46:24,067 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 06:46:24,068 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 06:46:24,068 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 36 [2020-09-25 06:46:24,068 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:46:24,069 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:46:24,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 06:46:24,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 06:46:24,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-09-25 06:46:24,070 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 06:46:24,094 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-25 06:46:24,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:46:24,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:46:24,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:46:24,276 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:46:24,277 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-09-25 06:46:24,277 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 06:46:24,277 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 173 [2020-09-25 06:46:24,277 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:46:24,278 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:46:24,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-25 06:46:24,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 06:46:24,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-09-25 06:46:24,280 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-25 06:46:24,458 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 22 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 06:46:24,458 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [33216766] [2020-09-25 06:46:24,458 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 06:46:24,459 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-25 06:46:24,459 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421427924] [2020-09-25 06:46:24,459 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-25 06:46:24,460 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 06:46:24,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-25 06:46:24,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-09-25 06:46:24,460 INFO L87 Difference]: Start difference. First operand 1950 states and 2318 transitions. Second operand 11 states. [2020-09-25 06:46:25,307 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 62 [2020-09-25 06:46:28,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 06:46:28,343 INFO L93 Difference]: Finished difference Result 4773 states and 5993 transitions. [2020-09-25 06:46:28,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-25 06:46:28,344 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 197 [2020-09-25 06:46:28,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 06:46:28,354 INFO L225 Difference]: With dead ends: 4773 [2020-09-25 06:46:28,355 INFO L226 Difference]: Without dead ends: 1918 [2020-09-25 06:46:28,364 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=117, Invalid=263, Unknown=0, NotChecked=0, Total=380 [2020-09-25 06:46:28,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1918 states. [2020-09-25 06:46:28,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1918 to 1878. [2020-09-25 06:46:28,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1878 states. [2020-09-25 06:46:28,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1878 states to 1878 states and 2188 transitions. [2020-09-25 06:46:28,424 INFO L78 Accepts]: Start accepts. Automaton has 1878 states and 2188 transitions. Word has length 197 [2020-09-25 06:46:28,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 06:46:28,424 INFO L479 AbstractCegarLoop]: Abstraction has 1878 states and 2188 transitions. [2020-09-25 06:46:28,425 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-25 06:46:28,425 INFO L276 IsEmpty]: Start isEmpty. Operand 1878 states and 2188 transitions. [2020-09-25 06:46:28,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2020-09-25 06:46:28,433 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 06:46:28,434 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 06:46:28,434 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-25 06:46:28,434 INFO L427 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 06:46:28,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 06:46:28,435 INFO L82 PathProgramCache]: Analyzing trace with hash 1532689640, now seen corresponding path program 1 times [2020-09-25 06:46:28,435 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 06:46:28,435 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1780053328] [2020-09-25 06:46:28,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 06:46:28,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:46:28,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:46:28,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:46:28,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:46:28,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:46:29,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:46:30,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:46:31,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:46:32,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:46:33,477 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:46:33,477 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 214 [2020-09-25 06:46:33,477 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-25 06:46:33,478 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-09-25 06:46:33,478 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:46:33,478 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:46:33,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 06:46:33,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 41 [2020-09-25 06:46:33,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-09-25 06:46:33,478 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 06:46:33,538 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 06:46:33,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:46:33,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:46:33,548 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:46:33,548 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 06:46:33,548 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 06:46:33,548 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-25 06:46:33,549 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:46:33,549 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:46:33,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 06:46:33,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 06:46:33,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 06:46:33,549 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 06:46:33,569 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-25 06:46:33,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:46:33,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:46:33,585 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:46:33,585 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-09-25 06:46:33,585 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 06:46:33,585 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-09-25 06:46:33,586 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:46:33,586 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:46:33,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 06:46:33,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 06:46:33,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-09-25 06:46:33,587 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 06:46:33,590 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-09-25 06:46:33,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:46:33,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:46:33,650 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:46:33,650 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-09-25 06:46:33,651 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 06:46:33,651 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 55 [2020-09-25 06:46:33,651 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:46:33,651 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:46:33,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 06:46:33,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-25 06:46:33,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-09-25 06:46:33,652 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 06:46:33,745 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 33 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-25 06:46:33,745 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1780053328] [2020-09-25 06:46:33,746 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 06:46:33,746 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-25 06:46:33,746 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053243281] [2020-09-25 06:46:33,746 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-25 06:46:33,747 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 06:46:33,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-25 06:46:33,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-09-25 06:46:33,747 INFO L87 Difference]: Start difference. First operand 1878 states and 2188 transitions. Second operand 7 states. [2020-09-25 06:46:36,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 06:46:36,528 INFO L93 Difference]: Finished difference Result 3819 states and 4593 transitions. [2020-09-25 06:46:36,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-25 06:46:36,528 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 201 [2020-09-25 06:46:36,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 06:46:36,539 INFO L225 Difference]: With dead ends: 3819 [2020-09-25 06:46:36,539 INFO L226 Difference]: Without dead ends: 1963 [2020-09-25 06:46:36,545 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-09-25 06:46:36,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1963 states. [2020-09-25 06:46:36,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1963 to 1763. [2020-09-25 06:46:36,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1763 states. [2020-09-25 06:46:36,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1763 states to 1763 states and 2026 transitions. [2020-09-25 06:46:36,604 INFO L78 Accepts]: Start accepts. Automaton has 1763 states and 2026 transitions. Word has length 201 [2020-09-25 06:46:36,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 06:46:36,604 INFO L479 AbstractCegarLoop]: Abstraction has 1763 states and 2026 transitions. [2020-09-25 06:46:36,605 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-25 06:46:36,605 INFO L276 IsEmpty]: Start isEmpty. Operand 1763 states and 2026 transitions. [2020-09-25 06:46:36,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2020-09-25 06:46:36,613 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 06:46:36,613 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:46:36,613 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-25 06:46:36,613 INFO L427 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 06:46:36,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 06:46:36,614 INFO L82 PathProgramCache]: Analyzing trace with hash 867383139, now seen corresponding path program 1 times [2020-09-25 06:46:36,614 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 06:46:36,615 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2060069183] [2020-09-25 06:46:36,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 06:46:36,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:46:36,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:46:36,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:46:36,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:46:37,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking...