/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=0.4 --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/Problem01_label38.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 05:33:57,775 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 05:33:57,779 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 05:33:57,825 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 05:33:57,825 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 05:33:57,833 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 05:33:57,835 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 05:33:57,839 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 05:33:57,841 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 05:33:57,844 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 05:33:57,845 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 05:33:57,846 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 05:33:57,846 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 05:33:57,849 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 05:33:57,852 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 05:33:57,853 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 05:33:57,855 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 05:33:57,856 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 05:33:57,858 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 05:33:57,866 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 05:33:57,868 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 05:33:57,869 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 05:33:57,870 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 05:33:57,870 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 05:33:57,883 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 05:33:57,883 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 05:33:57,883 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 05:33:57,886 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 05:33:57,886 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 05:33:57,887 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 05:33:57,888 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 05:33:57,888 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 05:33:57,890 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 05:33:57,891 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 05:33:57,892 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 05:33:57,892 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 05:33:57,893 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 05:33:57,893 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 05:33:57,893 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 05:33:57,894 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 05:33:57,896 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 05:33:57,897 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 05:33:57,941 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 05:33:57,942 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 05:33:57,944 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 05:33:57,944 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 05:33:57,944 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 05:33:57,945 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 05:33:57,945 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 05:33:57,945 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 05:33:57,945 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 05:33:57,946 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 05:33:57,947 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 05:33:57,947 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 05:33:57,947 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 05:33:57,948 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 05:33:57,948 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 05:33:57,948 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 05:33:57,948 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 05:33:57,948 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 05:33:57,949 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 05:33:57,949 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 05:33:57,949 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 05:33:57,949 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 05:33:57,949 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 05:33:57,950 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 05:33:57,950 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 05:33:57,950 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 05:33:57,950 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 05:33:57,950 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 05:33:57,951 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 05:33:57,951 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=0.4;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=0.4;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=0.4;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=0.4;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=0.4;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=0.4;log-additional-information=true; [2020-09-25 05:33:58,380 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 05:33:58,398 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 05:33:58,403 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 05:33:58,405 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 05:33:58,405 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 05:33:58,406 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem01_label38.c [2020-09-25 05:33:58,504 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4544a3c85/3316c05fa466467bb3a927e59f605105/FLAG412351e72 [2020-09-25 05:33:59,141 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 05:33:59,142 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem01_label38.c [2020-09-25 05:33:59,156 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4544a3c85/3316c05fa466467bb3a927e59f605105/FLAG412351e72 [2020-09-25 05:33:59,375 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4544a3c85/3316c05fa466467bb3a927e59f605105 [2020-09-25 05:33:59,391 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 05:33:59,398 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 05:33:59,401 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 05:33:59,402 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 05:33:59,406 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 05:33:59,407 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 05:33:59" (1/1) ... [2020-09-25 05:33:59,412 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@75e37eeb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 05:33:59, skipping insertion in model container [2020-09-25 05:33:59,412 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 05:33:59" (1/1) ... [2020-09-25 05:33:59,422 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 05:33:59,501 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 05:34:00,039 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 05:34:00,046 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 05:34:00,291 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 05:34:00,311 INFO L208 MainTranslator]: Completed translation [2020-09-25 05:34:00,312 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 05:34:00 WrapperNode [2020-09-25 05:34:00,312 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 05:34:00,313 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 05:34:00,313 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 05:34:00,313 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 05:34:00,334 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 05:34:00" (1/1) ... [2020-09-25 05:34:00,335 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 05:34:00" (1/1) ... [2020-09-25 05:34:00,353 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 05:34:00" (1/1) ... [2020-09-25 05:34:00,354 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 05:34:00" (1/1) ... [2020-09-25 05:34:00,392 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 05:34:00" (1/1) ... [2020-09-25 05:34:00,407 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 05:34:00" (1/1) ... [2020-09-25 05:34:00,411 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 05:34:00" (1/1) ... [2020-09-25 05:34:00,418 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 05:34:00,418 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 05:34:00,418 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 05:34:00,419 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 05:34:00,420 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 05:34:00" (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 05:34:00,501 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 05:34:00,502 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 05:34:00,502 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-09-25 05:34:00,502 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 05:34:00,502 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-09-25 05:34:00,502 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 05:34:00,502 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-25 05:34:00,502 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-09-25 05:34:00,503 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 05:34:00,503 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 05:34:00,503 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 05:34:01,847 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 05:34:01,847 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-25 05:34:01,861 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 05:34:01 BoogieIcfgContainer [2020-09-25 05:34:01,863 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 05:34:01,866 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 05:34:01,867 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 05:34:01,870 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 05:34:01,871 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 05:33:59" (1/3) ... [2020-09-25 05:34:01,872 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57f7315f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 05:34:01, skipping insertion in model container [2020-09-25 05:34:01,873 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 05:34:00" (2/3) ... [2020-09-25 05:34:01,873 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57f7315f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 05:34:01, skipping insertion in model container [2020-09-25 05:34:01,874 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 05:34:01" (3/3) ... [2020-09-25 05:34:01,877 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem01_label38.c [2020-09-25 05:34:01,886 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 05:34:01,896 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 05:34:01,917 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 05:34:01,952 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 05:34:01,952 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 05:34:01,952 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 05:34:01,952 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 05:34:01,953 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 05:34:01,953 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 05:34:01,953 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 05:34:01,953 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 05:34:01,985 INFO L276 IsEmpty]: Start isEmpty. Operand 525 states. [2020-09-25 05:34:02,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-09-25 05:34:02,005 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 05:34:02,006 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] [2020-09-25 05:34:02,007 INFO L427 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 05:34:02,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 05:34:02,015 INFO L82 PathProgramCache]: Analyzing trace with hash -857113145, now seen corresponding path program 1 times [2020-09-25 05:34:02,027 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 05:34:02,027 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1766651903] [2020-09-25 05:34:02,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 05:34:02,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:34:02,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:34:02,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:34:03,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:34:04,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:34:04,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:34:04,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:34:05,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:34:07,285 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:34:07,285 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 119 [2020-09-25 05:34:07,286 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-25 05:34:07,286 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-09-25 05:34:07,291 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:34:07,291 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:34:07,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 05:34:07,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-09-25 05:34:07,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 100 [2020-09-25 05:34:07,293 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-09-25 05:34:07,569 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 05:34:07,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:34:07,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:34:07,626 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:34:07,626 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-25 05:34:07,626 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 05:34:07,626 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 40 [2020-09-25 05:34:07,627 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:34:07,628 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:34:07,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 05:34:07,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 05:34:07,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-09-25 05:34:07,629 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 05:34:07,673 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 05:34:07,674 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1766651903] [2020-09-25 05:34:07,677 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 05:34:07,677 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-25 05:34:07,678 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826828342] [2020-09-25 05:34:07,686 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-25 05:34:07,686 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 05:34:07,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-25 05:34:07,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 05:34:07,708 INFO L87 Difference]: Start difference. First operand 525 states. Second operand 4 states. [2020-09-25 05:34:10,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 05:34:10,156 INFO L93 Difference]: Finished difference Result 1268 states and 1667 transitions. [2020-09-25 05:34:10,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-25 05:34:10,160 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 110 [2020-09-25 05:34:10,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 05:34:10,184 INFO L225 Difference]: With dead ends: 1268 [2020-09-25 05:34:10,185 INFO L226 Difference]: Without dead ends: 694 [2020-09-25 05:34:10,194 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 05:34:10,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 694 states. [2020-09-25 05:34:10,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 694 to 603. [2020-09-25 05:34:10,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 603 states. [2020-09-25 05:34:10,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 603 states to 603 states and 719 transitions. [2020-09-25 05:34:10,299 INFO L78 Accepts]: Start accepts. Automaton has 603 states and 719 transitions. Word has length 110 [2020-09-25 05:34:10,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 05:34:10,301 INFO L479 AbstractCegarLoop]: Abstraction has 603 states and 719 transitions. [2020-09-25 05:34:10,301 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-25 05:34:10,301 INFO L276 IsEmpty]: Start isEmpty. Operand 603 states and 719 transitions. [2020-09-25 05:34:10,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-09-25 05:34:10,311 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 05:34:10,312 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] [2020-09-25 05:34:10,312 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 05:34:10,312 INFO L427 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 05:34:10,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 05:34:10,313 INFO L82 PathProgramCache]: Analyzing trace with hash -431161361, now seen corresponding path program 1 times [2020-09-25 05:34:10,313 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 05:34:10,314 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [905518854] [2020-09-25 05:34:10,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 05:34:10,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:34:10,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:34:10,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:34:10,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:34:12,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:34:12,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:34:13,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:34:14,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:34:14,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:34:15,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:34:15,388 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:34:15,389 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 142 [2020-09-25 05:34:15,393 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-09-25 05:34:15,393 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5050 [2020-09-25 05:34:15,394 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:34:15,394 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:34:15,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 05:34:15,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 46 [2020-09-25 05:34:15,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 95 [2020-09-25 05:34:15,395 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 05:34:15,573 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 05:34:15,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:34:15,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:34:15,600 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:34:15,602 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-25 05:34:15,602 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 05:34:15,602 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-09-25 05:34:15,602 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:34:15,603 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:34:15,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 05:34:15,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 05:34:15,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 05:34:15,611 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 8 [2020-09-25 05:34:15,641 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-09-25 05:34:15,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:34:15,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:34:15,685 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:34:15,685 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-09-25 05:34:15,685 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 05:34:15,685 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 33 [2020-09-25 05:34:15,686 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:34:15,686 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:34:15,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 05:34:15,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 05:34:15,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-25 05:34:15,687 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 05:34:15,742 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 05:34:15,742 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [905518854] [2020-09-25 05:34:15,743 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 05:34:15,743 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-09-25 05:34:15,743 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532085171] [2020-09-25 05:34:15,747 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-25 05:34:15,748 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 05:34:15,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-25 05:34:15,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-25 05:34:15,748 INFO L87 Difference]: Start difference. First operand 603 states and 719 transitions. Second operand 6 states. [2020-09-25 05:34:18,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 05:34:18,717 INFO L93 Difference]: Finished difference Result 1877 states and 2385 transitions. [2020-09-25 05:34:18,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-25 05:34:18,717 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 131 [2020-09-25 05:34:18,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 05:34:18,727 INFO L225 Difference]: With dead ends: 1877 [2020-09-25 05:34:18,727 INFO L226 Difference]: Without dead ends: 1298 [2020-09-25 05:34:18,731 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-09-25 05:34:18,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1298 states. [2020-09-25 05:34:18,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1298 to 1034. [2020-09-25 05:34:18,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1034 states. [2020-09-25 05:34:18,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1034 states to 1034 states and 1310 transitions. [2020-09-25 05:34:18,793 INFO L78 Accepts]: Start accepts. Automaton has 1034 states and 1310 transitions. Word has length 131 [2020-09-25 05:34:18,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 05:34:18,794 INFO L479 AbstractCegarLoop]: Abstraction has 1034 states and 1310 transitions. [2020-09-25 05:34:18,795 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-25 05:34:18,795 INFO L276 IsEmpty]: Start isEmpty. Operand 1034 states and 1310 transitions. [2020-09-25 05:34:18,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2020-09-25 05:34:18,802 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 05:34:18,803 INFO L422 BasicCegarLoop]: trace histogram [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 05:34:18,803 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 05:34:18,803 INFO L427 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 05:34:18,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 05:34:18,804 INFO L82 PathProgramCache]: Analyzing trace with hash 39430160, now seen corresponding path program 1 times [2020-09-25 05:34:18,804 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 05:34:18,804 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1928060202] [2020-09-25 05:34:18,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 05:34:18,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:34:18,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:34:18,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:34:19,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:34:19,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:34:19,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:34:19,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:34:19,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:34:20,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:34:23,856 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:34:23,856 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 151 [2020-09-25 05:34:23,856 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-25 05:34:23,857 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-09-25 05:34:23,857 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:34:23,857 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:34:23,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 05:34:23,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 53 [2020-09-25 05:34:23,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 97 [2020-09-25 05:34:23,858 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 05:34:23,990 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 05:34:23,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:34:23,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:34:24,007 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:34:24,008 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-25 05:34:24,008 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 05:34:24,008 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-09-25 05:34:24,008 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:34:24,009 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:34:24,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 05:34:24,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 05:34:24,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 05:34:24,010 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 05:34:24,031 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-09-25 05:34:24,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:34:24,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:34:24,067 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:34:24,068 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-09-25 05:34:24,068 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 05:34:24,069 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 31 [2020-09-25 05:34:24,069 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:34:24,070 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:34:24,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 05:34:24,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 05:34:24,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-09-25 05:34:24,071 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 05:34:24,119 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 17 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 05:34:24,120 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1928060202] [2020-09-25 05:34:24,120 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 05:34:24,121 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-25 05:34:24,121 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523452564] [2020-09-25 05:34:24,122 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 05:34:24,122 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 05:34:24,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 05:34:24,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-25 05:34:24,123 INFO L87 Difference]: Start difference. First operand 1034 states and 1310 transitions. Second operand 5 states. [2020-09-25 05:34:26,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 05:34:26,132 INFO L93 Difference]: Finished difference Result 2483 states and 3245 transitions. [2020-09-25 05:34:26,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-25 05:34:26,133 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 140 [2020-09-25 05:34:26,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 05:34:26,146 INFO L225 Difference]: With dead ends: 2483 [2020-09-25 05:34:26,146 INFO L226 Difference]: Without dead ends: 998 [2020-09-25 05:34:26,154 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 2 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 05:34:26,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 998 states. [2020-09-25 05:34:26,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 998 to 988. [2020-09-25 05:34:26,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 988 states. [2020-09-25 05:34:26,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 988 states to 988 states and 1231 transitions. [2020-09-25 05:34:26,235 INFO L78 Accepts]: Start accepts. Automaton has 988 states and 1231 transitions. Word has length 140 [2020-09-25 05:34:26,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 05:34:26,236 INFO L479 AbstractCegarLoop]: Abstraction has 988 states and 1231 transitions. [2020-09-25 05:34:26,237 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 05:34:26,237 INFO L276 IsEmpty]: Start isEmpty. Operand 988 states and 1231 transitions. [2020-09-25 05:34:26,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2020-09-25 05:34:26,251 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 05:34:26,252 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:34:26,256 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 05:34:26,256 INFO L427 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 05:34:26,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 05:34:26,257 INFO L82 PathProgramCache]: Analyzing trace with hash -439956008, now seen corresponding path program 1 times [2020-09-25 05:34:26,257 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 05:34:26,259 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1225443773] [2020-09-25 05:34:26,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 05:34:26,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:34:26,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:34:26,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:34:27,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:34:27,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:34:27,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:34:28,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:34:31,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:34:31,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:34:31,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:34:31,315 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:34:31,315 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 158 [2020-09-25 05:34:31,316 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-09-25 05:34:31,316 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5024 [2020-09-25 05:34:31,316 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:34:31,316 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:34:31,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 05:34:31,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 58 [2020-09-25 05:34:31,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 99 [2020-09-25 05:34:31,317 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 05:34:31,410 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 05:34:31,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:34:31,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:34:31,427 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:34:31,427 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-25 05:34:31,428 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 05:34:31,428 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-09-25 05:34:31,428 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:34:31,428 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:34:31,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 05:34:31,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 05:34:31,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 05:34:31,429 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 05:34:31,452 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-09-25 05:34:31,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:34:31,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:34:31,499 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:34:31,499 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-09-25 05:34:31,500 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 05:34:31,500 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 37 [2020-09-25 05:34:31,500 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:34:31,501 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:34:31,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 05:34:31,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 05:34:31,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-09-25 05:34:31,502 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 05:34:31,564 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 25 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 05:34:31,564 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1225443773] [2020-09-25 05:34:31,565 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 05:34:31,565 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-25 05:34:31,565 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202248186] [2020-09-25 05:34:31,566 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 05:34:31,567 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 05:34:31,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 05:34:31,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-25 05:34:31,569 INFO L87 Difference]: Start difference. First operand 988 states and 1231 transitions. Second operand 5 states. [2020-09-25 05:34:33,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 05:34:33,907 INFO L93 Difference]: Finished difference Result 2684 states and 3490 transitions. [2020-09-25 05:34:33,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-25 05:34:33,908 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 147 [2020-09-25 05:34:33,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 05:34:33,936 INFO L225 Difference]: With dead ends: 2684 [2020-09-25 05:34:33,936 INFO L226 Difference]: Without dead ends: 1720 [2020-09-25 05:34:33,943 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 05:34:33,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1720 states. [2020-09-25 05:34:34,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1720 to 1276. [2020-09-25 05:34:34,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1276 states. [2020-09-25 05:34:34,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1276 states to 1276 states and 1571 transitions. [2020-09-25 05:34:34,037 INFO L78 Accepts]: Start accepts. Automaton has 1276 states and 1571 transitions. Word has length 147 [2020-09-25 05:34:34,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 05:34:34,038 INFO L479 AbstractCegarLoop]: Abstraction has 1276 states and 1571 transitions. [2020-09-25 05:34:34,038 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 05:34:34,038 INFO L276 IsEmpty]: Start isEmpty. Operand 1276 states and 1571 transitions. [2020-09-25 05:34:34,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2020-09-25 05:34:34,048 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 05:34:34,049 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, 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] [2020-09-25 05:34:34,049 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-25 05:34:34,049 INFO L427 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 05:34:34,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 05:34:34,050 INFO L82 PathProgramCache]: Analyzing trace with hash 1709240601, now seen corresponding path program 1 times [2020-09-25 05:34:34,050 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 05:34:34,051 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [924161899] [2020-09-25 05:34:34,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 05:34:34,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:34:34,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:34:34,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:34:34,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:34:34,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:34:34,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:34:34,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:34:36,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:34:39,115 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:34:39,115 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 164 [2020-09-25 05:34:39,116 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-25 05:34:39,116 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-09-25 05:34:39,116 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:34:39,116 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:34:39,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 05:34:39,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 66 [2020-09-25 05:34:39,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 97 [2020-09-25 05:34:39,117 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 05:34:39,213 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 05:34:39,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:34:39,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:34:39,230 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:34:39,230 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-25 05:34:39,230 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 05:34:39,231 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-09-25 05:34:39,231 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:34:39,231 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:34:39,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 05:34:39,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 05:34:39,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 05:34:39,232 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 05:34:39,256 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-09-25 05:34:39,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:34:39,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:34:39,318 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:34:39,319 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-09-25 05:34:39,319 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 05:34:39,319 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 51 [2020-09-25 05:34:39,319 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:34:39,319 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:34:39,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 05:34:39,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 05:34:39,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-09-25 05:34:39,320 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 05:34:39,360 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 33 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 05:34:39,361 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [924161899] [2020-09-25 05:34:39,361 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 05:34:39,361 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-25 05:34:39,361 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751226466] [2020-09-25 05:34:39,362 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 05:34:39,362 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 05:34:39,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 05:34:39,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-25 05:34:39,363 INFO L87 Difference]: Start difference. First operand 1276 states and 1571 transitions. Second operand 5 states. [2020-09-25 05:34:41,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 05:34:41,478 INFO L93 Difference]: Finished difference Result 3123 states and 3938 transitions. [2020-09-25 05:34:41,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-25 05:34:41,479 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 153 [2020-09-25 05:34:41,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 05:34:41,497 INFO L225 Difference]: With dead ends: 3123 [2020-09-25 05:34:41,497 INFO L226 Difference]: Without dead ends: 1871 [2020-09-25 05:34:41,507 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 05:34:41,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1871 states. [2020-09-25 05:34:41,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1871 to 1848. [2020-09-25 05:34:41,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1848 states. [2020-09-25 05:34:41,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1848 states to 1848 states and 2251 transitions. [2020-09-25 05:34:41,611 INFO L78 Accepts]: Start accepts. Automaton has 1848 states and 2251 transitions. Word has length 153 [2020-09-25 05:34:41,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 05:34:41,612 INFO L479 AbstractCegarLoop]: Abstraction has 1848 states and 2251 transitions. [2020-09-25 05:34:41,612 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 05:34:41,612 INFO L276 IsEmpty]: Start isEmpty. Operand 1848 states and 2251 transitions. [2020-09-25 05:34:41,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2020-09-25 05:34:41,625 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 05:34:41,625 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, 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] [2020-09-25 05:34:41,626 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-25 05:34:41,626 INFO L427 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 05:34:41,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 05:34:41,627 INFO L82 PathProgramCache]: Analyzing trace with hash 926609686, now seen corresponding path program 1 times [2020-09-25 05:34:41,627 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 05:34:41,627 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [36711238] [2020-09-25 05:34:41,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 05:34:41,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:34:41,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:34:41,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:34:42,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:34:42,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:34:42,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:34:43,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:34:43,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking...