/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 SequenceOfStatements --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=BIGGEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem19_label10.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-12 15:12:14,390 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-12 15:12:14,393 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-12 15:12:14,432 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-12 15:12:14,432 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-12 15:12:14,442 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-12 15:12:14,445 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-12 15:12:14,449 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-12 15:12:14,452 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-12 15:12:14,455 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-12 15:12:14,456 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-12 15:12:14,459 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-12 15:12:14,459 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-12 15:12:14,465 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-12 15:12:14,468 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-12 15:12:14,471 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-12 15:12:14,476 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-12 15:12:14,479 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-12 15:12:14,482 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-12 15:12:14,488 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-12 15:12:14,491 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-12 15:12:14,494 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-12 15:12:14,495 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-12 15:12:14,496 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-12 15:12:14,511 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-12 15:12:14,512 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-12 15:12:14,515 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-12 15:12:14,516 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-12 15:12:14,517 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-12 15:12:14,520 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-12 15:12:14,521 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-12 15:12:14,523 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-12 15:12:14,524 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-12 15:12:14,527 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-12 15:12:14,528 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-12 15:12:14,529 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-12 15:12:14,530 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-12 15:12:14,531 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-12 15:12:14,531 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-12 15:12:14,533 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-12 15:12:14,535 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-12 15:12:14,536 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 [2020-10-12 15:12:14,594 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-12 15:12:14,595 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-12 15:12:14,598 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-12 15:12:14,599 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-12 15:12:14,599 INFO L138 SettingsManager]: * Use SBE=true [2020-10-12 15:12:14,599 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-12 15:12:14,600 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-12 15:12:14,600 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-12 15:12:14,601 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-12 15:12:14,601 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-12 15:12:14,602 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-12 15:12:14,602 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-12 15:12:14,603 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-12 15:12:14,603 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-12 15:12:14,604 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-12 15:12:14,604 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-12 15:12:14,604 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-12 15:12:14,604 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-12 15:12:14,605 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-12 15:12:14,605 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-12 15:12:14,605 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-12 15:12:14,605 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-12 15:12:14,605 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-12 15:12:14,606 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-12 15:12:14,606 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-12 15:12:14,606 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-12 15:12:14,606 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-12 15:12:14,606 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-12 15:12:14,607 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-12 15:12:14,607 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 -> SequenceOfStatements 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=BIGGEST;log-additional-information=true;unknown-allowed=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=BIGGEST;log-additional-information=true;unknown-allowed=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=BIGGEST;log-additional-information=true;unknown-allowed=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=BIGGEST;log-additional-information=true;unknown-allowed=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=BIGGEST;log-additional-information=true;unknown-allowed=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=BIGGEST;log-additional-information=true;unknown-allowed=true; [2020-10-12 15:12:14,977 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-12 15:12:14,998 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-12 15:12:15,003 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-12 15:12:15,007 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-12 15:12:15,007 INFO L275 PluginConnector]: CDTParser initialized [2020-10-12 15:12:15,008 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem19_label10.c [2020-10-12 15:12:15,109 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/76821ff85/540a4a3bf87b48efa94bf8af2b297b86/FLAG7814e2bb1 [2020-10-12 15:12:16,295 INFO L306 CDTParser]: Found 1 translation units. [2020-10-12 15:12:16,296 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem19_label10.c [2020-10-12 15:12:16,358 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/76821ff85/540a4a3bf87b48efa94bf8af2b297b86/FLAG7814e2bb1 [2020-10-12 15:12:16,515 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/76821ff85/540a4a3bf87b48efa94bf8af2b297b86 [2020-10-12 15:12:16,526 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-12 15:12:16,528 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-12 15:12:16,530 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-12 15:12:16,531 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-12 15:12:16,536 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-12 15:12:16,538 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 03:12:16" (1/1) ... [2020-10-12 15:12:16,542 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@336c4a18 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:12:16, skipping insertion in model container [2020-10-12 15:12:16,542 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 03:12:16" (1/1) ... [2020-10-12 15:12:16,553 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-12 15:12:16,819 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-12 15:12:19,512 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 15:12:19,521 INFO L203 MainTranslator]: Completed pre-run [2020-10-12 15:12:20,621 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 15:12:20,680 INFO L208 MainTranslator]: Completed translation [2020-10-12 15:12:20,683 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:12:20 WrapperNode [2020-10-12 15:12:20,683 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-12 15:12:20,685 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-12 15:12:20,685 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-12 15:12:20,685 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-12 15:12:20,704 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:12:20" (1/1) ... [2020-10-12 15:12:20,705 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:12:20" (1/1) ... [2020-10-12 15:12:20,808 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:12:20" (1/1) ... [2020-10-12 15:12:20,809 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:12:20" (1/1) ... [2020-10-12 15:12:21,019 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:12:20" (1/1) ... [2020-10-12 15:12:21,068 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:12:20" (1/1) ... [2020-10-12 15:12:21,137 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:12:20" (1/1) ... [2020-10-12 15:12:21,260 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-12 15:12:21,262 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-12 15:12:21,262 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-12 15:12:21,262 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-12 15:12:21,263 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:12:20" (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 [2020-10-12 15:12:21,361 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-12 15:12:21,361 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-12 15:12:21,362 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-12 15:12:21,362 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-12 15:12:21,363 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2020-10-12 15:12:21,363 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2020-10-12 15:12:21,363 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output5 [2020-10-12 15:12:21,365 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output6 [2020-10-12 15:12:21,365 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-12 15:12:21,365 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-12 15:12:21,365 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-12 15:12:21,366 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2020-10-12 15:12:21,366 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2020-10-12 15:12:21,366 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output5 [2020-10-12 15:12:21,366 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output6 [2020-10-12 15:12:21,368 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-12 15:12:21,368 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-12 15:12:21,368 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-12 15:12:21,369 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-12 15:12:21,369 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-12 15:12:21,369 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-12 15:12:36,160 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-12 15:12:36,161 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-12 15:12:36,186 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 03:12:36 BoogieIcfgContainer [2020-10-12 15:12:36,186 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-12 15:12:36,189 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-12 15:12:36,190 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-12 15:12:36,195 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-12 15:12:36,196 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.10 03:12:16" (1/3) ... [2020-10-12 15:12:36,198 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b2d7f5a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 03:12:36, skipping insertion in model container [2020-10-12 15:12:36,199 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:12:20" (2/3) ... [2020-10-12 15:12:36,199 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b2d7f5a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 03:12:36, skipping insertion in model container [2020-10-12 15:12:36,199 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 03:12:36" (3/3) ... [2020-10-12 15:12:36,203 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem19_label10.c [2020-10-12 15:12:36,217 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-12 15:12:36,233 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-12 15:12:36,253 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-12 15:12:36,298 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-12 15:12:36,298 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-12 15:12:36,298 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-12 15:12:36,299 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-12 15:12:36,299 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-12 15:12:36,299 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-12 15:12:36,299 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-12 15:12:36,299 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-12 15:12:36,366 INFO L276 IsEmpty]: Start isEmpty. Operand 1777 states. [2020-10-12 15:12:36,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-12 15:12:36,377 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:12:36,379 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:12:36,380 INFO L427 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:12:36,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:12:36,389 INFO L82 PathProgramCache]: Analyzing trace with hash -223930596, now seen corresponding path program 1 times [2020-10-12 15:12:36,398 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:12:36,399 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [676194853] [2020-10-12 15:12:36,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:12:36,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:12:36,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:12:36,994 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:12:36,994 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-12 15:12:36,995 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:12:36,995 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 427 [2020-10-12 15:12:37,000 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:12:37,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 15:12:37,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 15:12:37,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-12 15:12:37,001 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-12 15:12:37,181 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:12:37,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:12:37,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:12:37,246 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:12:37,247 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:12:37,247 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:12:37,247 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 44 [2020-10-12 15:12:37,248 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:12:37,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 15:12:37,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:12:37,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 15:12:37,249 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:12:37,263 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:12:37,264 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [676194853] [2020-10-12 15:12:37,266 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 15:12:37,267 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-12 15:12:37,268 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448748507] [2020-10-12 15:12:37,276 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-12 15:12:37,277 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:12:37,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-12 15:12:37,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-12 15:12:37,300 INFO L87 Difference]: Start difference. First operand 1777 states. Second operand 4 states. [2020-10-12 15:13:09,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:13:09,500 INFO L93 Difference]: Finished difference Result 5038 states and 9462 transitions. [2020-10-12 15:13:09,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-12 15:13:09,503 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2020-10-12 15:13:09,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:13:09,563 INFO L225 Difference]: With dead ends: 5038 [2020-10-12 15:13:09,564 INFO L226 Difference]: Without dead ends: 3197 [2020-10-12 15:13:09,584 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-12 15:13:09,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3197 states. [2020-10-12 15:13:09,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3197 to 3192. [2020-10-12 15:13:09,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3192 states. [2020-10-12 15:13:09,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3192 states to 3192 states and 5230 transitions. [2020-10-12 15:13:09,879 INFO L78 Accepts]: Start accepts. Automaton has 3192 states and 5230 transitions. Word has length 13 [2020-10-12 15:13:09,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:13:09,880 INFO L479 AbstractCegarLoop]: Abstraction has 3192 states and 5230 transitions. [2020-10-12 15:13:09,881 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-12 15:13:09,881 INFO L276 IsEmpty]: Start isEmpty. Operand 3192 states and 5230 transitions. [2020-10-12 15:13:09,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-10-12 15:13:09,887 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:13:09,887 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-12 15:13:09,888 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-12 15:13:09,888 INFO L427 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:13:09,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:13:09,890 INFO L82 PathProgramCache]: Analyzing trace with hash -412440133, now seen corresponding path program 1 times [2020-10-12 15:13:09,890 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:13:09,891 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [423930328] [2020-10-12 15:13:09,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:13:09,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:13:10,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:13:10,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:13:10,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:13:10,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:13:11,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:13:12,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:13:12,139 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:13:12,139 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 96 [2020-10-12 15:13:12,140 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 15:13:12,140 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2185 [2020-10-12 15:13:12,141 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:13:12,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 15:13:12,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 15:13:12,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 90 [2020-10-12 15:13:12,142 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-12 15:13:12,230 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:13:12,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:13:12,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:13:12,245 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:13:12,246 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:13:12,246 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:13:12,246 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-12 15:13:12,247 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:13:12,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 15:13:12,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:13:12,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 15:13:12,248 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:13:12,277 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-12 15:13:12,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:13:12,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:13:12,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:13:12,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:13:12,687 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:13:12,687 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-12 15:13:12,688 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 15:13:12,688 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 381 [2020-10-12 15:13:12,688 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:13:12,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 15:13:12,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 15:13:12,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-12 15:13:12,690 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-12 15:13:12,829 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-12 15:13:12,830 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [423930328] [2020-10-12 15:13:12,831 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:13:12,831 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-12 15:13:12,831 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022655884] [2020-10-12 15:13:12,835 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 15:13:12,836 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:13:12,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 15:13:12,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-12 15:13:12,837 INFO L87 Difference]: Start difference. First operand 3192 states and 5230 transitions. Second operand 7 states. [2020-10-12 15:14:00,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:14:00,689 INFO L93 Difference]: Finished difference Result 9488 states and 15656 transitions. [2020-10-12 15:14:00,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-12 15:14:00,691 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 86 [2020-10-12 15:14:00,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:14:00,729 INFO L225 Difference]: With dead ends: 9488 [2020-10-12 15:14:00,730 INFO L226 Difference]: Without dead ends: 6302 [2020-10-12 15:14:00,742 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-12 15:14:00,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6302 states. [2020-10-12 15:14:00,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6302 to 6171. [2020-10-12 15:14:00,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6171 states. [2020-10-12 15:14:00,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6171 states to 6171 states and 8878 transitions. [2020-10-12 15:14:00,946 INFO L78 Accepts]: Start accepts. Automaton has 6171 states and 8878 transitions. Word has length 86 [2020-10-12 15:14:00,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:14:00,947 INFO L479 AbstractCegarLoop]: Abstraction has 6171 states and 8878 transitions. [2020-10-12 15:14:00,947 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 15:14:00,947 INFO L276 IsEmpty]: Start isEmpty. Operand 6171 states and 8878 transitions. [2020-10-12 15:14:00,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-10-12 15:14:00,951 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:14:00,952 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-12 15:14:00,952 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-12 15:14:00,953 INFO L427 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:14:00,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:14:00,953 INFO L82 PathProgramCache]: Analyzing trace with hash -1911772878, now seen corresponding path program 1 times [2020-10-12 15:14:00,954 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:14:00,954 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [874602633] [2020-10-12 15:14:00,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:14:00,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:14:01,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:14:01,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:14:01,775 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:14:01,776 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 104 [2020-10-12 15:14:01,776 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:14:01,776 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 782 [2020-10-12 15:14:01,777 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:14:01,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 15:14:01,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 15:14:01,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 87 [2020-10-12 15:14:01,778 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:14:01,849 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:14:01,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:14:01,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:14:01,863 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:14:01,863 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:14:01,863 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:14:01,864 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-12 15:14:01,864 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:14:01,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 15:14:01,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:14:01,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 15:14:01,865 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:14:01,893 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-12 15:14:01,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:14:01,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:14:02,066 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:14:02,067 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-12 15:14:02,067 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:14:02,068 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 152 [2020-10-12 15:14:02,068 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:14:02,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 15:14:02,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 15:14:02,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-12 15:14:02,069 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:14:02,172 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:14:02,173 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [874602633] [2020-10-12 15:14:02,173 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 15:14:02,173 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-12 15:14:02,173 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721364045] [2020-10-12 15:14:02,174 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 15:14:02,175 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:14:02,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 15:14:02,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-12 15:14:02,175 INFO L87 Difference]: Start difference. First operand 6171 states and 8878 transitions. Second operand 7 states. [2020-10-12 15:14:47,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:14:47,927 INFO L93 Difference]: Finished difference Result 18739 states and 27274 transitions. [2020-10-12 15:14:47,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-12 15:14:47,931 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 94 [2020-10-12 15:14:47,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:14:47,997 INFO L225 Difference]: With dead ends: 18739 [2020-10-12 15:14:47,997 INFO L226 Difference]: Without dead ends: 12574 [2020-10-12 15:14:48,015 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-12 15:14:48,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12574 states. [2020-10-12 15:14:48,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12574 to 12340. [2020-10-12 15:14:48,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12340 states. [2020-10-12 15:14:48,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12340 states to 12340 states and 17416 transitions. [2020-10-12 15:14:48,354 INFO L78 Accepts]: Start accepts. Automaton has 12340 states and 17416 transitions. Word has length 94 [2020-10-12 15:14:48,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:14:48,355 INFO L479 AbstractCegarLoop]: Abstraction has 12340 states and 17416 transitions. [2020-10-12 15:14:48,358 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 15:14:48,359 INFO L276 IsEmpty]: Start isEmpty. Operand 12340 states and 17416 transitions. [2020-10-12 15:14:48,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-10-12 15:14:48,368 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:14:48,368 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-12 15:14:48,369 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-12 15:14:48,371 INFO L427 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:14:48,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:14:48,372 INFO L82 PathProgramCache]: Analyzing trace with hash 609249160, now seen corresponding path program 1 times [2020-10-12 15:14:48,372 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:14:48,373 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1939369795] [2020-10-12 15:14:48,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:14:48,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:14:48,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:14:48,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:14:49,514 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:14:49,523 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 124 [2020-10-12 15:14:49,524 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:14:49,524 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1081 [2020-10-12 15:14:49,524 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:14:49,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 15:14:49,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 15:14:49,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 107 [2020-10-12 15:14:49,525 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:14:49,626 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:14:49,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:14:49,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:14:49,640 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:14:49,640 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:14:49,641 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:14:49,641 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-12 15:14:49,641 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:14:49,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 15:14:49,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:14:49,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 15:14:49,643 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:14:49,684 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-12 15:14:49,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:14:49,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:14:49,938 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:14:49,939 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-10-12 15:14:49,939 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:14:49,939 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 219 [2020-10-12 15:14:49,939 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:14:49,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 15:14:49,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 15:14:49,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 102 [2020-10-12 15:14:49,940 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:14:50,159 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:14:50,160 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1939369795] [2020-10-12 15:14:50,160 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 15:14:50,160 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-12 15:14:50,161 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085036066] [2020-10-12 15:14:50,161 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 15:14:50,162 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:14:50,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 15:14:50,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-12 15:14:50,163 INFO L87 Difference]: Start difference. First operand 12340 states and 17416 transitions. Second operand 7 states.