/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_label11.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 21:41:28,969 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 21:41:28,972 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 21:41:28,998 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 21:41:28,999 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 21:41:29,000 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 21:41:29,001 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 21:41:29,003 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 21:41:29,004 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 21:41:29,005 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 21:41:29,006 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 21:41:29,007 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 21:41:29,008 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 21:41:29,009 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 21:41:29,010 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 21:41:29,011 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 21:41:29,012 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 21:41:29,013 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 21:41:29,014 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 21:41:29,016 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 21:41:29,018 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 21:41:29,019 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 21:41:29,020 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 21:41:29,021 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 21:41:29,023 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 21:41:29,024 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 21:41:29,024 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 21:41:29,025 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 21:41:29,025 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 21:41:29,026 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 21:41:29,026 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 21:41:29,027 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 21:41:29,028 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 21:41:29,029 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 21:41:29,030 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 21:41:29,030 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 21:41:29,031 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 21:41:29,031 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 21:41:29,031 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 21:41:29,032 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 21:41:29,033 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 21:41:29,034 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 21:41:29,060 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 21:41:29,060 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 21:41:29,061 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 21:41:29,062 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 21:41:29,062 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 21:41:29,062 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 21:41:29,062 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 21:41:29,062 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 21:41:29,063 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 21:41:29,063 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 21:41:29,063 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 21:41:29,063 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 21:41:29,063 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 21:41:29,064 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 21:41:29,064 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 21:41:29,064 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 21:41:29,064 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 21:41:29,064 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 21:41:29,065 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 21:41:29,065 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 21:41:29,065 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 21:41:29,065 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 21:41:29,065 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 21:41:29,066 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 21:41:29,066 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 21:41:29,066 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 21:41:29,066 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 21:41:29,066 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 21:41:29,067 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 21:41:29,067 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 21:41:29,505 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 21:41:29,522 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 21:41:29,526 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 21:41:29,528 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 21:41:29,529 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 21:41:29,530 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem02_label11.c [2020-09-24 21:41:29,615 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e11a20eb1/91dad5d8d0f34f99a133ec05a983de6c/FLAG7ad2965a1 [2020-09-24 21:41:30,267 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 21:41:30,269 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem02_label11.c [2020-09-24 21:41:30,285 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e11a20eb1/91dad5d8d0f34f99a133ec05a983de6c/FLAG7ad2965a1 [2020-09-24 21:41:30,454 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e11a20eb1/91dad5d8d0f34f99a133ec05a983de6c [2020-09-24 21:41:30,471 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 21:41:30,480 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 21:41:30,484 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 21:41:30,484 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 21:41:30,488 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 21:41:30,490 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 09:41:30" (1/1) ... [2020-09-24 21:41:30,494 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 24.09 09:41:30, skipping insertion in model container [2020-09-24 21:41:30,495 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 09:41:30" (1/1) ... [2020-09-24 21:41:30,505 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 21:41:30,556 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 21:41:31,112 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 21:41:31,119 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 21:41:31,229 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 21:41:31,255 INFO L208 MainTranslator]: Completed translation [2020-09-24 21:41:31,256 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:41:31 WrapperNode [2020-09-24 21:41:31,256 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 21:41:31,257 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 21:41:31,258 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 21:41:31,258 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 21:41:31,273 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:41:31" (1/1) ... [2020-09-24 21:41:31,273 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:41:31" (1/1) ... [2020-09-24 21:41:31,294 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:41:31" (1/1) ... [2020-09-24 21:41:31,294 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:41:31" (1/1) ... [2020-09-24 21:41:31,334 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:41:31" (1/1) ... [2020-09-24 21:41:31,363 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:41:31" (1/1) ... [2020-09-24 21:41:31,368 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:41:31" (1/1) ... [2020-09-24 21:41:31,375 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 21:41:31,376 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 21:41:31,376 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 21:41:31,376 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 21:41:31,378 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:41:31" (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 21:41:31,460 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 21:41:31,460 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 21:41:31,460 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-09-24 21:41:31,460 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 21:41:31,461 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-09-24 21:41:31,461 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 21:41:31,461 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-24 21:41:31,461 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-09-24 21:41:31,461 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 21:41:31,462 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 21:41:31,462 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 21:41:32,821 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 21:41:32,822 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-24 21:41:32,831 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 09:41:32 BoogieIcfgContainer [2020-09-24 21:41:32,831 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 21:41:32,832 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 21:41:32,833 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 21:41:32,836 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 21:41:32,837 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 09:41:30" (1/3) ... [2020-09-24 21:41:32,838 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39890648 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 09:41:32, skipping insertion in model container [2020-09-24 21:41:32,838 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:41:31" (2/3) ... [2020-09-24 21:41:32,839 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39890648 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 09:41:32, skipping insertion in model container [2020-09-24 21:41:32,839 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 09:41:32" (3/3) ... [2020-09-24 21:41:32,841 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem02_label11.c [2020-09-24 21:41:32,853 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 21:41:32,864 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 21:41:32,887 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 21:41:32,922 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 21:41:32,923 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 21:41:32,923 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 21:41:32,923 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 21:41:32,923 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 21:41:32,923 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 21:41:32,923 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 21:41:32,924 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 21:41:32,956 INFO L276 IsEmpty]: Start isEmpty. Operand 527 states. [2020-09-24 21:41:32,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2020-09-24 21:41:32,977 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:41:32,978 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:41:32,979 INFO L427 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:41:32,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:41:32,987 INFO L82 PathProgramCache]: Analyzing trace with hash 604783425, now seen corresponding path program 1 times [2020-09-24 21:41:32,999 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:41:32,999 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [829968196] [2020-09-24 21:41:33,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:41:33,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:41:33,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:33,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:33,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:34,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:34,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:35,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:36,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:37,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:37,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:38,289 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:41:38,289 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 143 [2020-09-24 21:41:38,289 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-09-24 21:41:38,290 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-09-24 21:41:38,294 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:41:38,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-09-24 21:41:38,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-09-24 21:41:38,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-09-24 21:41:38,295 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-09-24 21:41:38,972 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:41:38,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:41:38,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:39,083 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:41:39,084 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-24 21:41:39,085 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:41:39,085 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 98 [2020-09-24 21:41:39,086 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:41:39,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-24 21:41:39,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:41:39,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-09-24 21:41:39,089 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-24 21:41:39,347 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 21:41:39,348 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [829968196] [2020-09-24 21:41:39,351 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 21:41:39,351 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2020-09-24 21:41:39,352 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068620127] [2020-09-24 21:41:39,359 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-24 21:41:39,360 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:41:39,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-24 21:41:39,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-09-24 21:41:39,382 INFO L87 Difference]: Start difference. First operand 527 states. Second operand 17 states. [2020-09-24 21:41:39,904 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 73 [2020-09-24 21:41:40,163 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 73 [2020-09-24 21:41:40,383 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 80 [2020-09-24 21:41:40,627 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 79 [2020-09-24 21:41:40,871 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 78 [2020-09-24 21:41:41,299 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 73 [2020-09-24 21:41:41,546 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 71 [2020-09-24 21:41:41,971 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 77 [2020-09-24 21:41:42,868 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 74 [2020-09-24 21:41:43,079 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 75 [2020-09-24 21:41:43,264 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 70 [2020-09-24 21:41:43,622 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 72 [2020-09-24 21:41:44,430 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 68 [2020-09-24 21:41:44,911 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 65 [2020-09-24 21:41:45,109 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 71 [2020-09-24 21:41:46,078 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 69 [2020-09-24 21:41:46,494 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 66 [2020-09-24 21:41:48,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:41:48,822 INFO L93 Difference]: Finished difference Result 1860 states and 2652 transitions. [2020-09-24 21:41:48,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-09-24 21:41:48,824 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 134 [2020-09-24 21:41:48,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:41:48,856 INFO L225 Difference]: With dead ends: 1860 [2020-09-24 21:41:48,856 INFO L226 Difference]: Without dead ends: 1230 [2020-09-24 21:41:48,866 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 493 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=539, Invalid=1353, Unknown=0, NotChecked=0, Total=1892 [2020-09-24 21:41:48,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1230 states. [2020-09-24 21:41:48,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1230 to 1070. [2020-09-24 21:41:48,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1070 states. [2020-09-24 21:41:48,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1070 states to 1070 states and 1287 transitions. [2020-09-24 21:41:48,998 INFO L78 Accepts]: Start accepts. Automaton has 1070 states and 1287 transitions. Word has length 134 [2020-09-24 21:41:48,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:41:48,999 INFO L479 AbstractCegarLoop]: Abstraction has 1070 states and 1287 transitions. [2020-09-24 21:41:48,999 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-24 21:41:49,000 INFO L276 IsEmpty]: Start isEmpty. Operand 1070 states and 1287 transitions. [2020-09-24 21:41:49,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2020-09-24 21:41:49,010 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:41:49,010 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:41:49,011 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 21:41:49,011 INFO L427 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:41:49,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:41:49,012 INFO L82 PathProgramCache]: Analyzing trace with hash -652427357, now seen corresponding path program 1 times [2020-09-24 21:41:49,012 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:41:49,012 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [991068346] [2020-09-24 21:41:49,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:41:49,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:41:49,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:49,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:49,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:49,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:49,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:50,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:50,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:51,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:52,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:53,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:53,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:54,078 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:41:54,079 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 167 [2020-09-24 21:41:54,079 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-09-24 21:41:54,079 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-09-24 21:41:54,079 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:41:54,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-09-24 21:41:54,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-09-24 21:41:54,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 119 [2020-09-24 21:41:54,080 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:41:54,790 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 35 [2020-09-24 21:41:54,941 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 34 [2020-09-24 21:41:55,096 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 32 [2020-09-24 21:41:55,266 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:41:55,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:41:55,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:55,330 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:41:55,330 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-24 21:41:55,331 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:41:55,331 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 54 [2020-09-24 21:41:55,331 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:41:55,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-24 21:41:55,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:41:55,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-09-24 21:41:55,361 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 29 [2020-09-24 21:41:55,450 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-24 21:41:55,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:41:55,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:55,529 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:41:55,530 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-09-24 21:41:55,530 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:41:55,530 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 72 [2020-09-24 21:41:55,530 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:41:55,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 21:41:55,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-24 21:41:55,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-09-24 21:41:55,531 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:41:55,752 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 21:41:55,753 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [991068346] [2020-09-24 21:41:55,753 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:41:55,753 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-09-24 21:41:55,754 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366978900] [2020-09-24 21:41:55,756 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-24 21:41:55,756 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:41:55,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-24 21:41:55,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2020-09-24 21:41:55,757 INFO L87 Difference]: Start difference. First operand 1070 states and 1287 transitions. Second operand 19 states. [2020-09-24 21:41:56,523 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 78 [2020-09-24 21:41:56,781 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 85 [2020-09-24 21:41:57,276 WARN L193 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 82 [2020-09-24 21:41:57,571 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 81 [2020-09-24 21:41:58,489 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 74 [2020-09-24 21:41:58,949 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 78 [2020-09-24 21:41:59,330 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 74 [2020-09-24 21:41:59,647 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 80 [2020-09-24 21:42:00,580 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 73 [2020-09-24 21:42:01,310 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 73 [2020-09-24 21:42:01,756 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 78 [2020-09-24 21:42:02,744 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 71 [2020-09-24 21:42:03,432 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 71 [2020-09-24 21:42:03,908 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 68 [2020-09-24 21:42:04,344 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 68 [2020-09-24 21:42:06,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:42:06,196 INFO L93 Difference]: Finished difference Result 4079 states and 5454 transitions. [2020-09-24 21:42:06,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-09-24 21:42:06,197 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 156 [2020-09-24 21:42:06,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:42:06,223 INFO L225 Difference]: With dead ends: 4079 [2020-09-24 21:42:06,223 INFO L226 Difference]: Without dead ends: 3089 [2020-09-24 21:42:06,233 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 547 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=593, Invalid=1477, Unknown=0, NotChecked=0, Total=2070 [2020-09-24 21:42:06,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3089 states. [2020-09-24 21:42:06,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3089 to 3017. [2020-09-24 21:42:06,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3017 states. [2020-09-24 21:42:06,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3017 states to 3017 states and 3660 transitions. [2020-09-24 21:42:06,390 INFO L78 Accepts]: Start accepts. Automaton has 3017 states and 3660 transitions. Word has length 156 [2020-09-24 21:42:06,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:42:06,392 INFO L479 AbstractCegarLoop]: Abstraction has 3017 states and 3660 transitions. [2020-09-24 21:42:06,392 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-24 21:42:06,393 INFO L276 IsEmpty]: Start isEmpty. Operand 3017 states and 3660 transitions. [2020-09-24 21:42:06,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2020-09-24 21:42:06,410 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:42:06,410 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, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:42:06,411 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 21:42:06,411 INFO L427 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:42:06,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:42:06,411 INFO L82 PathProgramCache]: Analyzing trace with hash 1238072142, now seen corresponding path program 1 times [2020-09-24 21:42:06,412 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:42:06,412 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [353825037] [2020-09-24 21:42:06,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:42:06,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:42:06,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:42:06,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:42:07,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:42:07,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:42:07,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:42:08,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:42:08,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:42:08,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:42:10,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:42:11,451 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:42:11,451 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 182 [2020-09-24 21:42:11,451 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-09-24 21:42:11,452 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-09-24 21:42:11,452 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:42:11,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-09-24 21:42:11,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-09-24 21:42:11,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 138 [2020-09-24 21:42:11,453 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:42:11,641 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:42:11,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:42:11,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:42:11,705 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:42:11,705 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-24 21:42:11,706 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:42:11,707 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 51 [2020-09-24 21:42:11,714 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:42:11,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 21:42:11,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:42:11,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-09-24 21:42:11,716 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:42:11,774 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-24 21:42:11,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:42:11,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:42:11,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:42:11,824 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:42:11,825 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-24 21:42:11,825 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 21:42:11,825 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 45 [2020-09-24 21:42:11,826 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:42:11,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 21:42:11,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-24 21:42:11,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-09-24 21:42:11,841 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 15 [2020-09-24 21:42:11,947 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-09-24 21:42:11,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:42:11,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:42:11,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:42:12,022 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:42:12,023 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-09-24 21:42:12,024 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 21:42:12,024 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 70 [2020-09-24 21:42:12,024 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:42:12,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-24 21:42:12,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-24 21:42:12,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-09-24 21:42:12,026 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:42:12,543 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 22 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-09-24 21:42:12,544 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [353825037] [2020-09-24 21:42:12,545 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:42:12,545 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-09-24 21:42:12,546 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170074298] [2020-09-24 21:42:12,548 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-24 21:42:12,548 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:42:12,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-24 21:42:12,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2020-09-24 21:42:12,549 INFO L87 Difference]: Start difference. First operand 3017 states and 3660 transitions. Second operand 12 states. [2020-09-24 21:42:13,470 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2020-09-24 21:42:13,894 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 59 [2020-09-24 21:42:14,037 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 55 [2020-09-24 21:42:15,806 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 61 [2020-09-24 21:42:18,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:42:18,998 INFO L93 Difference]: Finished difference Result 8645 states and 11430 transitions. [2020-09-24 21:42:18,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-24 21:42:18,999 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 169 [2020-09-24 21:42:19,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:42:19,040 INFO L225 Difference]: With dead ends: 8645 [2020-09-24 21:42:19,040 INFO L226 Difference]: Without dead ends: 5355 [2020-09-24 21:42:19,060 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=227, Invalid=475, Unknown=0, NotChecked=0, Total=702 [2020-09-24 21:42:19,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5355 states. [2020-09-24 21:42:19,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5355 to 4709. [2020-09-24 21:42:19,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4709 states. [2020-09-24 21:42:19,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4709 states to 4709 states and 5791 transitions. [2020-09-24 21:42:19,245 INFO L78 Accepts]: Start accepts. Automaton has 4709 states and 5791 transitions. Word has length 169 [2020-09-24 21:42:19,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:42:19,246 INFO L479 AbstractCegarLoop]: Abstraction has 4709 states and 5791 transitions. [2020-09-24 21:42:19,246 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-24 21:42:19,246 INFO L276 IsEmpty]: Start isEmpty. Operand 4709 states and 5791 transitions. [2020-09-24 21:42:19,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2020-09-24 21:42:19,263 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:42:19,264 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:42:19,264 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 21:42:19,265 INFO L427 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:42:19,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:42:19,265 INFO L82 PathProgramCache]: Analyzing trace with hash 752591990, now seen corresponding path program 1 times [2020-09-24 21:42:19,265 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:42:19,266 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1832814616] [2020-09-24 21:42:19,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:42:19,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:42:19,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:42:19,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:42:19,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:42:19,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking...