/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=LOWLEXORDER --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_label42.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 21:42:58,850 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 21:42:58,853 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 21:42:58,882 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 21:42:58,882 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 21:42:58,883 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 21:42:58,885 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 21:42:58,887 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 21:42:58,889 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 21:42:58,890 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 21:42:58,891 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 21:42:58,892 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 21:42:58,892 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 21:42:58,894 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 21:42:58,895 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 21:42:58,896 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 21:42:58,897 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 21:42:58,902 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 21:42:58,904 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 21:42:58,906 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 21:42:58,911 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 21:42:58,913 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 21:42:58,916 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 21:42:58,919 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 21:42:58,922 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 21:42:58,925 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 21:42:58,925 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 21:42:58,926 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 21:42:58,927 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 21:42:58,930 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... 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[2020-09-24 21:42:58,936 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 21:42:58,937 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 21:42:58,939 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 21:42:58,940 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 [2020-09-24 21:42:59,000 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 21:42:59,001 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 21:42:59,003 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 21:42:59,003 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 21:42:59,003 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 21:42:59,003 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 21:42:59,003 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 21:42:59,004 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 21:42:59,005 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 21:42:59,005 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 21:42:59,005 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 21:42:59,005 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 21:42:59,005 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 21:42:59,006 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 21:42:59,006 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 21:42:59,006 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 21:42:59,006 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 21:42:59,006 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 21:42:59,007 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 21:42:59,008 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 21:42:59,008 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 21:42:59,008 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 21:42:59,009 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 21:42:59,009 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 21:42:59,009 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 21:42:59,009 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 21:42:59,009 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 21:42:59,010 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 21:42:59,010 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 21:42:59,010 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=LOWLEXORDER;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=LOWLEXORDER;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=LOWLEXORDER;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=LOWLEXORDER;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=LOWLEXORDER;log-additional-information=true; [2020-09-24 21:42:59,472 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 21:42:59,492 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 21:42:59,497 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 21:42:59,499 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 21:42:59,501 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 21:42:59,502 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem02_label42.c [2020-09-24 21:42:59,578 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4fe15c105/a92f77157ce749968b0e2987a08cf415/FLAG8966fda48 [2020-09-24 21:43:00,226 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 21:43:00,227 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem02_label42.c [2020-09-24 21:43:00,241 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4fe15c105/a92f77157ce749968b0e2987a08cf415/FLAG8966fda48 [2020-09-24 21:43:00,445 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4fe15c105/a92f77157ce749968b0e2987a08cf415 [2020-09-24 21:43:00,460 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 21:43:00,467 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 21:43:00,468 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 21:43:00,468 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 21:43:00,473 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 21:43:00,474 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 09:43:00" (1/1) ... [2020-09-24 21:43:00,479 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@51d7e22e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:43:00, skipping insertion in model container [2020-09-24 21:43:00,479 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 09:43:00" (1/1) ... [2020-09-24 21:43:00,488 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 21:43:00,544 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 21:43:01,117 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 21:43:01,125 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 21:43:01,293 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 21:43:01,321 INFO L208 MainTranslator]: Completed translation [2020-09-24 21:43:01,323 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:43:01 WrapperNode [2020-09-24 21:43:01,323 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 21:43:01,324 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 21:43:01,324 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 21:43:01,324 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 21:43:01,339 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:43:01" (1/1) ... [2020-09-24 21:43:01,340 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:43:01" (1/1) ... [2020-09-24 21:43:01,359 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:43:01" (1/1) ... [2020-09-24 21:43:01,360 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:43:01" (1/1) ... [2020-09-24 21:43:01,403 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:43:01" (1/1) ... [2020-09-24 21:43:01,422 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:43:01" (1/1) ... [2020-09-24 21:43:01,428 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:43:01" (1/1) ... [2020-09-24 21:43:01,435 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 21:43:01,436 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 21:43:01,436 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 21:43:01,436 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 21:43:01,438 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:43:01" (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 [2020-09-24 21:43:01,518 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 21:43:01,519 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 21:43:01,519 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-09-24 21:43:01,519 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 21:43:01,519 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-09-24 21:43:01,519 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 21:43:01,519 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-24 21:43:01,519 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-09-24 21:43:01,520 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 21:43:01,520 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 21:43:01,520 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 21:43:03,052 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 21:43:03,053 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-24 21:43:03,072 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 09:43:03 BoogieIcfgContainer [2020-09-24 21:43:03,072 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 21:43:03,073 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 21:43:03,074 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 21:43:03,078 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 21:43:03,079 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 09:43:00" (1/3) ... [2020-09-24 21:43:03,080 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10cc4012 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 09:43:03, skipping insertion in model container [2020-09-24 21:43:03,081 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:43:01" (2/3) ... [2020-09-24 21:43:03,081 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10cc4012 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 09:43:03, skipping insertion in model container [2020-09-24 21:43:03,082 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 09:43:03" (3/3) ... [2020-09-24 21:43:03,084 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem02_label42.c [2020-09-24 21:43:03,096 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 21:43:03,112 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 21:43:03,135 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 21:43:03,180 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 21:43:03,180 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 21:43:03,181 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 21:43:03,181 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 21:43:03,181 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 21:43:03,181 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 21:43:03,181 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 21:43:03,181 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 21:43:03,213 INFO L276 IsEmpty]: Start isEmpty. Operand 527 states. [2020-09-24 21:43:03,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-09-24 21:43:03,235 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:43:03,238 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] [2020-09-24 21:43:03,243 INFO L427 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:43:03,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:43:03,250 INFO L82 PathProgramCache]: Analyzing trace with hash -551630175, now seen corresponding path program 1 times [2020-09-24 21:43:03,259 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:43:03,260 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [376496137] [2020-09-24 21:43:03,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:43:03,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:43:03,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:03,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:04,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:04,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:06,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:06,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:08,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:08,597 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:43:08,598 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 135 [2020-09-24 21:43:08,598 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-24 21:43:08,598 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5022 [2020-09-24 21:43:08,602 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:43:08,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-09-24 21:43:08,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-09-24 21:43:08,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-09-24 21:43:08,603 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-24 21:43:09,596 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:43:09,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:43:09,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:09,708 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:43:09,708 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-24 21:43:09,708 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:43:09,709 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 99 [2020-09-24 21:43:09,709 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:43:09,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-24 21:43:09,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:43:09,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-09-24 21:43:09,711 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:43:09,955 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:43:09,957 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [376496137] [2020-09-24 21:43:09,959 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 21:43:09,959 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2020-09-24 21:43:09,960 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017454473] [2020-09-24 21:43:09,970 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-24 21:43:09,970 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:43:09,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-24 21:43:09,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2020-09-24 21:43:09,993 INFO L87 Difference]: Start difference. First operand 527 states. Second operand 16 states. [2020-09-24 21:43:10,370 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2020-09-24 21:43:10,799 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 80 [2020-09-24 21:43:11,089 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 79 [2020-09-24 21:43:11,731 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 72 [2020-09-24 21:43:12,158 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 78 [2020-09-24 21:43:13,171 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 76 [2020-09-24 21:43:13,365 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 71 [2020-09-24 21:43:14,286 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 69 [2020-09-24 21:43:14,648 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 66 [2020-09-24 21:43:18,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:43:18,422 INFO L93 Difference]: Finished difference Result 1870 states and 2662 transitions. [2020-09-24 21:43:18,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-09-24 21:43:18,425 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 126 [2020-09-24 21:43:18,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:43:18,455 INFO L225 Difference]: With dead ends: 1870 [2020-09-24 21:43:18,455 INFO L226 Difference]: Without dead ends: 1241 [2020-09-24 21:43:18,469 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 365 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=415, Invalid=917, Unknown=0, NotChecked=0, Total=1332 [2020-09-24 21:43:18,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1241 states. [2020-09-24 21:43:18,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1241 to 1076. [2020-09-24 21:43:18,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1076 states. [2020-09-24 21:43:18,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1076 states to 1076 states and 1294 transitions. [2020-09-24 21:43:18,597 INFO L78 Accepts]: Start accepts. Automaton has 1076 states and 1294 transitions. Word has length 126 [2020-09-24 21:43:18,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:43:18,598 INFO L479 AbstractCegarLoop]: Abstraction has 1076 states and 1294 transitions. [2020-09-24 21:43:18,598 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-24 21:43:18,598 INFO L276 IsEmpty]: Start isEmpty. Operand 1076 states and 1294 transitions. [2020-09-24 21:43:18,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-09-24 21:43:18,612 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:43:18,612 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:43:18,612 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 21:43:18,613 INFO L427 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:43:18,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:43:18,613 INFO L82 PathProgramCache]: Analyzing trace with hash -690304765, now seen corresponding path program 1 times [2020-09-24 21:43:18,614 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:43:18,614 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [742756897] [2020-09-24 21:43:18,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:43:18,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:43:18,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:18,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:18,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:18,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:20,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:20,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:20,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:21,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:23,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:23,670 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:43:23,670 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 159 [2020-09-24 21:43:23,670 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-09-24 21:43:23,670 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-09-24 21:43:23,671 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:43:23,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-09-24 21:43:23,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-09-24 21:43:23,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 119 [2020-09-24 21:43:23,673 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-24 21:43:24,497 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 45 [2020-09-24 21:43:24,769 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 45 [2020-09-24 21:43:24,977 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 41 [2020-09-24 21:43:25,175 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 37 [2020-09-24 21:43:25,352 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 32 [2020-09-24 21:43:25,416 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:43:25,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:43:25,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:25,472 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:43:25,473 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-24 21:43:25,473 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:43:25,473 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 49 [2020-09-24 21:43:25,473 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:43:25,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-24 21:43:25,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:43:25,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-09-24 21:43:25,474 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:43:25,566 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-24 21:43:25,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:43:25,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:25,623 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:43:25,624 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-09-24 21:43:25,624 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:43:25,624 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 51 [2020-09-24 21:43:25,624 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:43:25,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 21:43:25,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-24 21:43:25,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-09-24 21:43:25,625 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:43:26,134 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:43:26,134 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [742756897] [2020-09-24 21:43:26,135 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:43:26,135 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-09-24 21:43:26,135 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551735435] [2020-09-24 21:43:26,138 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-24 21:43:26,139 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:43:26,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-24 21:43:26,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2020-09-24 21:43:26,140 INFO L87 Difference]: Start difference. First operand 1076 states and 1294 transitions. Second operand 19 states. [2020-09-24 21:43:27,111 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 86 [2020-09-24 21:43:27,437 WARN L193 SmtUtils]: Spent 291.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 104 [2020-09-24 21:43:27,988 WARN L193 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 97 [2020-09-24 21:43:28,355 WARN L193 SmtUtils]: Spent 300.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 94 [2020-09-24 21:43:28,576 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 62 [2020-09-24 21:43:29,238 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 58 [2020-09-24 21:43:29,628 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 83 [2020-09-24 21:43:30,152 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 87 [2020-09-24 21:43:30,295 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 55 [2020-09-24 21:43:30,666 WARN L193 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 79 [2020-09-24 21:43:31,023 WARN L193 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 91 [2020-09-24 21:43:32,025 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 79 [2020-09-24 21:43:32,876 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 76 [2020-09-24 21:43:33,437 WARN L193 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 86 [2020-09-24 21:43:34,644 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 75 [2020-09-24 21:43:35,515 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 72 [2020-09-24 21:43:36,109 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 69 [2020-09-24 21:43:36,656 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 66 [2020-09-24 21:43:39,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:43:39,031 INFO L93 Difference]: Finished difference Result 4063 states and 5408 transitions. [2020-09-24 21:43:39,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-09-24 21:43:39,033 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 148 [2020-09-24 21:43:39,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:43:39,058 INFO L225 Difference]: With dead ends: 4063 [2020-09-24 21:43:39,059 INFO L226 Difference]: Without dead ends: 3067 [2020-09-24 21:43:39,067 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 512 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=631, Invalid=1531, Unknown=0, NotChecked=0, Total=2162 [2020-09-24 21:43:39,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3067 states. [2020-09-24 21:43:39,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3067 to 2844. [2020-09-24 21:43:39,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2844 states. [2020-09-24 21:43:39,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2844 states to 2844 states and 3418 transitions. [2020-09-24 21:43:39,196 INFO L78 Accepts]: Start accepts. Automaton has 2844 states and 3418 transitions. Word has length 148 [2020-09-24 21:43:39,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:43:39,197 INFO L479 AbstractCegarLoop]: Abstraction has 2844 states and 3418 transitions. [2020-09-24 21:43:39,197 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-24 21:43:39,197 INFO L276 IsEmpty]: Start isEmpty. Operand 2844 states and 3418 transitions. [2020-09-24 21:43:39,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2020-09-24 21:43:39,208 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:43:39,209 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 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] [2020-09-24 21:43:39,209 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 21:43:39,210 INFO L427 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:43:39,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:43:39,210 INFO L82 PathProgramCache]: Analyzing trace with hash -221683794, now seen corresponding path program 1 times [2020-09-24 21:43:39,210 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:43:39,210 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2007805181] [2020-09-24 21:43:39,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:43:39,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:43:39,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:39,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:39,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:39,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:39,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:40,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:41,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:42,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:42,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:43,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:43,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:44,259 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:43:44,259 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 174 [2020-09-24 21:43:44,260 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-09-24 21:43:44,260 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-09-24 21:43:44,260 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:43:44,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-09-24 21:43:44,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-09-24 21:43:44,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 138 [2020-09-24 21:43:44,261 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:43:44,409 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:43:44,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:43:44,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:44,455 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:43:44,456 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-24 21:43:44,456 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:43:44,456 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 41 [2020-09-24 21:43:44,456 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:43:44,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 21:43:44,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:43:44,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-09-24 21:43:44,457 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:43:44,493 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-24 21:43:44,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:43:44,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:44,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:44,526 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:43:44,527 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-24 21:43:44,527 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 21:43:44,527 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 29 [2020-09-24 21:43:44,527 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:43:44,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 21:43:44,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-24 21:43:44,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-09-24 21:43:44,528 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:43:44,553 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-09-24 21:43:44,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:43:44,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:44,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:44,620 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:43:44,621 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-09-24 21:43:44,621 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 21:43:44,621 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 63 [2020-09-24 21:43:44,621 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:43:44,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-24 21:43:44,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-24 21:43:44,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-09-24 21:43:44,622 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:43:45,114 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-09-24 21:43:45,115 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2007805181] [2020-09-24 21:43:45,115 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:43:45,115 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-09-24 21:43:45,116 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514573128] [2020-09-24 21:43:45,117 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-24 21:43:45,117 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:43:45,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-24 21:43:45,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-09-24 21:43:45,118 INFO L87 Difference]: Start difference. First operand 2844 states and 3418 transitions. Second operand 13 states. [2020-09-24 21:43:45,833 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 59 [2020-09-24 21:43:46,241 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 58 [2020-09-24 21:43:47,955 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2020-09-24 21:43:50,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:43:50,696 INFO L93 Difference]: Finished difference Result 8430 states and 11099 transitions. [2020-09-24 21:43:50,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-24 21:43:50,697 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 161 [2020-09-24 21:43:50,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:43:50,726 INFO L225 Difference]: With dead ends: 8430 [2020-09-24 21:43:50,727 INFO L226 Difference]: Without dead ends: 5311 [2020-09-24 21:43:50,740 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=265, Invalid=547, Unknown=0, NotChecked=0, Total=812 [2020-09-24 21:43:50,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5311 states. [2020-09-24 21:43:50,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5311 to 4363. [2020-09-24 21:43:50,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4363 states. [2020-09-24 21:43:50,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4363 states to 4363 states and 5325 transitions. [2020-09-24 21:43:50,876 INFO L78 Accepts]: Start accepts. Automaton has 4363 states and 5325 transitions. Word has length 161 [2020-09-24 21:43:50,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:43:50,876 INFO L479 AbstractCegarLoop]: Abstraction has 4363 states and 5325 transitions. [2020-09-24 21:43:50,876 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-24 21:43:50,876 INFO L276 IsEmpty]: Start isEmpty. Operand 4363 states and 5325 transitions. [2020-09-24 21:43:50,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2020-09-24 21:43:50,888 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:43:50,889 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:43:50,889 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 21:43:50,889 INFO L427 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:43:50,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:43:50,890 INFO L82 PathProgramCache]: Analyzing trace with hash 1931458201, now seen corresponding path program 1 times [2020-09-24 21:43:50,890 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:43:50,890 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [964882154] [2020-09-24 21:43:50,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:43:50,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:43:50,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:50,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:51,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking...