/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_label32.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 21:42:40,455 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 21:42:40,458 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 21:42:40,484 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 21:42:40,485 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 21:42:40,486 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 21:42:40,487 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 21:42:40,489 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 21:42:40,491 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 21:42:40,492 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 21:42:40,493 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 21:42:40,494 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 21:42:40,495 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 21:42:40,496 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 21:42:40,497 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 21:42:40,498 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 21:42:40,499 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 21:42:40,501 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 21:42:40,502 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 21:42:40,505 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 21:42:40,506 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 21:42:40,508 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 21:42:40,509 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 21:42:40,510 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 21:42:40,512 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 21:42:40,513 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 21:42:40,513 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 21:42:40,514 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 21:42:40,515 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 21:42:40,516 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 21:42:40,516 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 21:42:40,517 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 21:42:40,518 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 21:42:40,519 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 21:42:40,520 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 21:42:40,520 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 21:42:40,521 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 21:42:40,521 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 21:42:40,522 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 21:42:40,523 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 21:42:40,524 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 21:42:40,525 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 21:42:40,568 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 21:42:40,568 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 21:42:40,570 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 21:42:40,570 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 21:42:40,570 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 21:42:40,570 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 21:42:40,570 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 21:42:40,571 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 21:42:40,571 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 21:42:40,571 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 21:42:40,571 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 21:42:40,571 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 21:42:40,572 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 21:42:40,575 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 21:42:40,575 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 21:42:40,575 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 21:42:40,575 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 21:42:40,576 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 21:42:40,576 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 21:42:40,576 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 21:42:40,576 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 21:42:40,576 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 21:42:40,579 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 21:42:40,579 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 21:42:40,579 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 21:42:40,580 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 21:42:40,580 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 21:42:40,580 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 21:42:40,580 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 21:42:40,581 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 21:42:41,054 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 21:42:41,071 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 21:42:41,076 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 21:42:41,078 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 21:42:41,078 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 21:42:41,079 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem02_label32.c [2020-09-24 21:42:41,179 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b3731ee39/88c4ce64d0214dbe802c8afc2f984bde/FLAG86193a4ff [2020-09-24 21:42:41,819 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 21:42:41,820 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem02_label32.c [2020-09-24 21:42:41,836 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b3731ee39/88c4ce64d0214dbe802c8afc2f984bde/FLAG86193a4ff [2020-09-24 21:42:42,076 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b3731ee39/88c4ce64d0214dbe802c8afc2f984bde [2020-09-24 21:42:42,091 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 21:42:42,098 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 21:42:42,099 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 21:42:42,099 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 21:42:42,103 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 21:42:42,104 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 09:42:42" (1/1) ... [2020-09-24 21:42:42,109 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@674884e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:42:42, skipping insertion in model container [2020-09-24 21:42:42,109 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 09:42:42" (1/1) ... [2020-09-24 21:42:42,118 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 21:42:42,186 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 21:42:42,690 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 21:42:42,696 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 21:42:42,925 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 21:42:42,946 INFO L208 MainTranslator]: Completed translation [2020-09-24 21:42:42,947 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:42:42 WrapperNode [2020-09-24 21:42:42,947 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 21:42:42,948 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 21:42:42,948 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 21:42:42,948 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 21:42:42,962 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:42:42" (1/1) ... [2020-09-24 21:42:42,962 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:42:42" (1/1) ... [2020-09-24 21:42:42,981 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:42:42" (1/1) ... [2020-09-24 21:42:42,982 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:42:42" (1/1) ... [2020-09-24 21:42:43,021 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:42:42" (1/1) ... [2020-09-24 21:42:43,040 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:42:42" (1/1) ... [2020-09-24 21:42:43,045 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:42:42" (1/1) ... [2020-09-24 21:42:43,052 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 21:42:43,053 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 21:42:43,053 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 21:42:43,053 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 21:42:43,054 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:42:42" (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 21:42:43,156 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 21:42:43,157 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 21:42:43,157 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-09-24 21:42:43,157 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 21:42:43,157 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-09-24 21:42:43,158 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 21:42:43,158 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-24 21:42:43,158 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-09-24 21:42:43,160 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 21:42:43,160 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 21:42:43,160 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 21:42:44,665 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 21:42:44,665 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-24 21:42:44,674 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 09:42:44 BoogieIcfgContainer [2020-09-24 21:42:44,675 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 21:42:44,676 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 21:42:44,676 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 21:42:44,680 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 21:42:44,680 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 09:42:42" (1/3) ... [2020-09-24 21:42:44,681 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@169e7aa2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 09:42:44, skipping insertion in model container [2020-09-24 21:42:44,682 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:42:42" (2/3) ... [2020-09-24 21:42:44,682 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@169e7aa2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 09:42:44, skipping insertion in model container [2020-09-24 21:42:44,682 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 09:42:44" (3/3) ... [2020-09-24 21:42:44,685 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem02_label32.c [2020-09-24 21:42:44,696 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 21:42:44,708 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 21:42:44,730 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 21:42:44,763 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 21:42:44,764 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 21:42:44,764 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 21:42:44,764 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 21:42:44,764 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 21:42:44,764 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 21:42:44,765 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 21:42:44,765 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 21:42:44,796 INFO L276 IsEmpty]: Start isEmpty. Operand 527 states. [2020-09-24 21:42:44,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-09-24 21:42:44,819 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:42:44,821 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:42:44,821 INFO L427 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:42:44,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:42:44,829 INFO L82 PathProgramCache]: Analyzing trace with hash 1568421906, now seen corresponding path program 1 times [2020-09-24 21:42:44,841 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:42:44,841 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [523169948] [2020-09-24 21:42:44,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:42:45,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:42:45,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:42:45,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:42:46,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:42:46,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:42:47,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:42:48,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:42:48,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:42:48,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:42:48,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:42:50,113 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:42:50,114 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 144 [2020-09-24 21:42:50,114 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-09-24 21:42:50,114 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-09-24 21:42:50,117 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:42:50,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-09-24 21:42:50,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-09-24 21:42:50,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-09-24 21:42:50,119 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-24 21:42:50,854 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 31 [2020-09-24 21:42:51,239 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:42:51,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:42:51,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:42:51,345 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:42:51,346 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-24 21:42:51,346 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:42:51,346 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 76 [2020-09-24 21:42:51,346 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:42:51,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-24 21:42:51,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:42:51,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-09-24 21:42:51,347 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:42:51,709 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 21:42:51,710 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [523169948] [2020-09-24 21:42:51,713 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 21:42:51,713 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2020-09-24 21:42:51,714 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245735990] [2020-09-24 21:42:51,722 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-24 21:42:51,723 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:42:51,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-24 21:42:51,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2020-09-24 21:42:51,746 INFO L87 Difference]: Start difference. First operand 527 states. Second operand 18 states. [2020-09-24 21:42:52,134 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 74 [2020-09-24 21:42:52,329 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 74 [2020-09-24 21:42:52,523 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 81 [2020-09-24 21:42:52,784 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 80 [2020-09-24 21:42:53,089 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 79 [2020-09-24 21:42:53,584 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 74 [2020-09-24 21:42:53,932 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 72 [2020-09-24 21:42:54,374 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 78 [2020-09-24 21:42:55,519 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 76 [2020-09-24 21:42:55,740 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 71 [2020-09-24 21:42:56,088 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 73 [2020-09-24 21:42:56,967 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 69 [2020-09-24 21:42:57,550 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 66 [2020-09-24 21:42:57,772 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 72 [2020-09-24 21:42:58,873 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 70 [2020-09-24 21:42:59,377 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 67 [2020-09-24 21:43:02,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:43:02,307 INFO L93 Difference]: Finished difference Result 1871 states and 2663 transitions. [2020-09-24 21:43:02,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-09-24 21:43:02,309 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 135 [2020-09-24 21:43:02,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:43:02,340 INFO L225 Difference]: With dead ends: 1871 [2020-09-24 21:43:02,340 INFO L226 Difference]: Without dead ends: 1243 [2020-09-24 21:43:02,353 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 475 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=487, Invalid=1319, Unknown=0, NotChecked=0, Total=1806 [2020-09-24 21:43:02,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1243 states. [2020-09-24 21:43:02,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1243 to 1076. [2020-09-24 21:43:02,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1076 states. [2020-09-24 21:43:02,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1076 states to 1076 states and 1295 transitions. [2020-09-24 21:43:02,495 INFO L78 Accepts]: Start accepts. Automaton has 1076 states and 1295 transitions. Word has length 135 [2020-09-24 21:43:02,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:43:02,496 INFO L479 AbstractCegarLoop]: Abstraction has 1076 states and 1295 transitions. [2020-09-24 21:43:02,496 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-24 21:43:02,497 INFO L276 IsEmpty]: Start isEmpty. Operand 1076 states and 1295 transitions. [2020-09-24 21:43:02,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2020-09-24 21:43:02,511 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:43:02,511 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:43:02,512 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 21:43:02,512 INFO L427 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:43:02,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:43:02,513 INFO L82 PathProgramCache]: Analyzing trace with hash 1119247929, now seen corresponding path program 1 times [2020-09-24 21:43:02,513 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:43:02,513 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [852102785] [2020-09-24 21:43:02,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:43:02,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:43:02,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:02,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:03,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:03,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:04,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:06,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:06,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:06,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:07,592 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:43:07,593 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 163 [2020-09-24 21:43:07,593 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-24 21:43:07,593 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-09-24 21:43:07,594 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:43:07,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-09-24 21:43:07,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-09-24 21:43:07,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 110 [2020-09-24 21:43:07,595 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:43:08,259 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 37 [2020-09-24 21:43:08,449 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 42 [2020-09-24 21:43:08,647 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 40 [2020-09-24 21:43:08,867 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 40 [2020-09-24 21:43:09,048 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 37 [2020-09-24 21:43:09,208 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 38 [2020-09-24 21:43:09,384 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 38 [2020-09-24 21:43:09,527 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 36 [2020-09-24 21:43:09,662 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 27 [2020-09-24 21:43:09,856 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:43:09,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:43:09,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:09,907 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:43:09,908 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-24 21:43:09,908 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:43:09,908 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 44 [2020-09-24 21:43:09,908 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:43:09,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-24 21:43:09,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:43:09,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-09-24 21:43:09,909 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:43:10,026 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-24 21:43:10,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:43:10,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:10,068 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:43:10,069 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-24 21:43:10,069 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:43:10,069 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 37 [2020-09-24 21:43:10,069 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:43:10,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-24 21:43:10,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-24 21:43:10,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-09-24 21:43:10,070 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:43:10,334 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:43:10,334 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [852102785] [2020-09-24 21:43:10,334 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:43:10,335 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-09-24 21:43:10,335 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684689221] [2020-09-24 21:43:10,337 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-24 21:43:10,338 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:43:10,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-24 21:43:10,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2020-09-24 21:43:10,339 INFO L87 Difference]: Start difference. First operand 1076 states and 1295 transitions. Second operand 23 states. [2020-09-24 21:43:11,086 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 100 [2020-09-24 21:43:11,512 WARN L193 SmtUtils]: Spent 322.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 103 [2020-09-24 21:43:13,318 WARN L193 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 101 [2020-09-24 21:43:13,968 WARN L193 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 101 [2020-09-24 21:43:14,403 WARN L193 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 98 [2020-09-24 21:43:14,982 WARN L193 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 98 [2020-09-24 21:43:15,735 WARN L193 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 98 [2020-09-24 21:43:16,132 WARN L193 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 97 [2020-09-24 21:43:16,557 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 64 [2020-09-24 21:43:17,078 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 90 [2020-09-24 21:43:17,603 WARN L193 SmtUtils]: Spent 356.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 88 [2020-09-24 21:43:18,706 WARN L193 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 86 [2020-09-24 21:43:19,102 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 82 [2020-09-24 21:43:19,494 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 84 [2020-09-24 21:43:19,924 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 80 [2020-09-24 21:43:20,495 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 81 [2020-09-24 21:43:21,067 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 79 [2020-09-24 21:43:23,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:43:23,309 INFO L93 Difference]: Finished difference Result 2562 states and 3131 transitions. [2020-09-24 21:43:23,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-09-24 21:43:23,310 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 152 [2020-09-24 21:43:23,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:43:23,319 INFO L225 Difference]: With dead ends: 2562 [2020-09-24 21:43:23,320 INFO L226 Difference]: Without dead ends: 1566 [2020-09-24 21:43:23,325 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 736 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=781, Invalid=1975, Unknown=0, NotChecked=0, Total=2756 [2020-09-24 21:43:23,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1566 states. [2020-09-24 21:43:23,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1566 to 1340. [2020-09-24 21:43:23,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1340 states. [2020-09-24 21:43:23,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1340 states to 1340 states and 1626 transitions. [2020-09-24 21:43:23,424 INFO L78 Accepts]: Start accepts. Automaton has 1340 states and 1626 transitions. Word has length 152 [2020-09-24 21:43:23,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:43:23,425 INFO L479 AbstractCegarLoop]: Abstraction has 1340 states and 1626 transitions. [2020-09-24 21:43:23,426 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-24 21:43:23,426 INFO L276 IsEmpty]: Start isEmpty. Operand 1340 states and 1626 transitions. [2020-09-24 21:43:23,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2020-09-24 21:43:23,434 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:43:23,434 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:43:23,435 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 21:43:23,435 INFO L427 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:43:23,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:43:23,435 INFO L82 PathProgramCache]: Analyzing trace with hash 1249593328, now seen corresponding path program 1 times [2020-09-24 21:43:23,435 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:43:23,436 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1123726949] [2020-09-24 21:43:23,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:43:23,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:43:23,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:23,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:23,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:24,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:24,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:25,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:25,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:28,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:28,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:28,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:28,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:28,486 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:43:28,486 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 168 [2020-09-24 21:43:28,486 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-09-24 21:43:28,486 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-09-24 21:43:28,487 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:43:28,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-09-24 21:43:28,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-09-24 21:43:28,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 119 [2020-09-24 21:43:28,488 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:43:28,853 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:43:28,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:43:28,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:28,910 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:43:28,911 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-24 21:43:28,911 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:43:28,911 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 51 [2020-09-24 21:43:28,911 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:43:28,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-24 21:43:28,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:43:28,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-09-24 21:43:28,912 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:43:28,997 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-24 21:43:29,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:43:29,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:29,052 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:43:29,052 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-09-24 21:43:29,052 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:43:29,052 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 50 [2020-09-24 21:43:29,052 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:43:29,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 21:43:29,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-24 21:43:29,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-09-24 21:43:29,053 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:43:29,275 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:43:29,276 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1123726949] [2020-09-24 21:43:29,276 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:43:29,276 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-09-24 21:43:29,276 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107538245] [2020-09-24 21:43:29,277 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-24 21:43:29,278 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:43:29,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-24 21:43:29,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2020-09-24 21:43:29,279 INFO L87 Difference]: Start difference. First operand 1340 states and 1626 transitions. Second operand 19 states. [2020-09-24 21:43:30,408 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 79 [2020-09-24 21:43:30,643 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 78 [2020-09-24 21:43:31,293 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 71 [2020-09-24 21:43:31,538 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 77 [2020-09-24 21:43:31,816 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 61 [2020-09-24 21:43:32,295 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 56 [2020-09-24 21:43:32,588 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 71 [2020-09-24 21:43:33,199 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 70 [2020-09-24 21:43:33,488 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 75 [2020-09-24 21:43:34,359 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 70 [2020-09-24 21:43:34,855 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 68 [2020-09-24 21:43:35,574 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 65 [2020-09-24 21:43:36,180 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 68 [2020-09-24 21:43:36,922 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 65