/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.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=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.3 --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 language data_model -i ../../../trunk/examples/svcomp/eca-rers2012/Problem19_label29.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-29 08:50:28,425 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-29 08:50:28,428 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-29 08:50:28,486 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-29 08:50:28,487 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-29 08:50:28,496 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-29 08:50:28,499 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-29 08:50:28,506 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-29 08:50:28,511 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-29 08:50:28,519 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-29 08:50:28,521 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-29 08:50:28,523 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-29 08:50:28,523 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-29 08:50:28,528 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-29 08:50:28,531 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-29 08:50:28,533 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-29 08:50:28,535 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-29 08:50:28,538 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-29 08:50:28,546 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-29 08:50:28,557 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-29 08:50:28,559 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-29 08:50:28,562 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-29 08:50:28,564 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-29 08:50:28,567 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-29 08:50:28,577 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-29 08:50:28,578 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-29 08:50:28,594 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-29 08:50:28,597 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-29 08:50:28,597 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-29 08:50:28,599 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-29 08:50:28,599 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-29 08:50:28,600 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-29 08:50:28,603 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-29 08:50:28,604 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-29 08:50:28,606 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-29 08:50:28,607 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-29 08:50:28,608 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-29 08:50:28,608 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-29 08:50:28,608 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-29 08:50:28,610 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-29 08:50:28,611 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-29 08:50:28,620 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 [2020-10-29 08:50:28,682 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-29 08:50:28,682 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-29 08:50:28,689 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-29 08:50:28,690 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-29 08:50:28,690 INFO L138 SettingsManager]: * Use SBE=true [2020-10-29 08:50:28,691 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-29 08:50:28,691 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-29 08:50:28,691 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-29 08:50:28,692 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-29 08:50:28,692 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-29 08:50:28,693 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-29 08:50:28,694 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-29 08:50:28,694 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-29 08:50:28,695 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-29 08:50:28,695 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-29 08:50:28,695 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-29 08:50:28,695 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-29 08:50:28,696 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-29 08:50:28,696 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-29 08:50:28,696 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-29 08:50:28,696 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-29 08:50:28,697 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 08:50:28,697 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-29 08:50:28,697 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-29 08:50:28,698 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-29 08:50:28,698 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-29 08:50:28,698 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-29 08:50:28,698 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-29 08:50:28,699 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-29 08:50:28,699 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true;unknown-allowed=true; [2020-10-29 08:50:29,178 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-29 08:50:29,213 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-29 08:50:29,217 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-29 08:50:29,219 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-29 08:50:29,220 INFO L275 PluginConnector]: CDTParser initialized [2020-10-29 08:50:29,221 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem19_label29.c [2020-10-29 08:50:29,325 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c79035429/9183c8b8f634411d88908e249875fd4b/FLAG875978c4d [2020-10-29 08:50:30,845 INFO L306 CDTParser]: Found 1 translation units. [2020-10-29 08:50:30,846 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem19_label29.c [2020-10-29 08:50:30,922 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c79035429/9183c8b8f634411d88908e249875fd4b/FLAG875978c4d [2020-10-29 08:50:31,425 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c79035429/9183c8b8f634411d88908e249875fd4b [2020-10-29 08:50:31,430 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-29 08:50:31,440 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-29 08:50:31,445 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-29 08:50:31,445 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-29 08:50:31,450 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-29 08:50:31,451 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 08:50:31" (1/1) ... [2020-10-29 08:50:31,456 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@69f3b34f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:50:31, skipping insertion in model container [2020-10-29 08:50:31,456 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 08:50:31" (1/1) ... [2020-10-29 08:50:31,465 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-29 08:50:31,727 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-29 08:50:34,245 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 08:50:34,261 INFO L203 MainTranslator]: Completed pre-run [2020-10-29 08:50:35,567 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 08:50:35,636 INFO L208 MainTranslator]: Completed translation [2020-10-29 08:50:35,638 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:50:35 WrapperNode [2020-10-29 08:50:35,638 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-29 08:50:35,639 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-29 08:50:35,639 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-29 08:50:35,640 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-29 08:50:35,657 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:50:35" (1/1) ... [2020-10-29 08:50:35,659 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:50:35" (1/1) ... [2020-10-29 08:50:35,833 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:50:35" (1/1) ... [2020-10-29 08:50:35,834 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:50:35" (1/1) ... [2020-10-29 08:50:36,044 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:50:35" (1/1) ... [2020-10-29 08:50:36,212 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:50:35" (1/1) ... [2020-10-29 08:50:36,279 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:50:35" (1/1) ... [2020-10-29 08:50:36,341 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-29 08:50:36,343 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-29 08:50:36,344 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-29 08:50:36,344 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-29 08:50:36,345 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:50:35" (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 [2020-10-29 08:50:36,499 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-29 08:50:36,499 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-29 08:50:36,500 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-29 08:50:36,500 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-29 08:50:36,500 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-29 08:50:36,500 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2020-10-29 08:50:36,501 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2020-10-29 08:50:36,501 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output5 [2020-10-29 08:50:36,501 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output6 [2020-10-29 08:50:36,501 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-29 08:50:36,502 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-29 08:50:36,502 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-29 08:50:36,502 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2020-10-29 08:50:36,502 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2020-10-29 08:50:36,502 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output5 [2020-10-29 08:50:36,502 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output6 [2020-10-29 08:50:36,503 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-29 08:50:36,503 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-29 08:50:36,503 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-29 08:50:36,503 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-29 08:50:36,503 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-29 08:50:36,503 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-29 08:50:36,504 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-29 08:50:36,504 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-29 08:50:36,504 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-29 08:50:36,504 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-29 08:50:36,504 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-29 08:50:36,504 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-29 08:50:36,504 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-29 08:50:53,235 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-29 08:50:53,237 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-29 08:50:53,243 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 08:50:53 BoogieIcfgContainer [2020-10-29 08:50:53,243 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-29 08:50:53,249 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-29 08:50:53,249 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-29 08:50:53,253 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-29 08:50:53,254 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.10 08:50:31" (1/3) ... [2020-10-29 08:50:53,255 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6411f2d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 08:50:53, skipping insertion in model container [2020-10-29 08:50:53,255 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:50:35" (2/3) ... [2020-10-29 08:50:53,256 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6411f2d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 08:50:53, skipping insertion in model container [2020-10-29 08:50:53,256 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 08:50:53" (3/3) ... [2020-10-29 08:50:53,258 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem19_label29.c [2020-10-29 08:50:53,277 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-29 08:50:53,285 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-29 08:50:53,301 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-29 08:50:53,343 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-29 08:50:53,344 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-29 08:50:53,344 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-29 08:50:53,344 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-29 08:50:53,344 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-29 08:50:53,344 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-29 08:50:53,344 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-29 08:50:53,345 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-29 08:50:53,405 INFO L276 IsEmpty]: Start isEmpty. Operand 1781 states. [2020-10-29 08:50:53,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-29 08:50:53,413 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 08:50:53,414 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] [2020-10-29 08:50:53,415 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 08:50:53,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 08:50:53,422 INFO L82 PathProgramCache]: Analyzing trace with hash -84072859, now seen corresponding path program 1 times [2020-10-29 08:50:53,434 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 08:50:53,435 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1451638076] [2020-10-29 08:50:53,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 08:50:53,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:50:53,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:50:54,335 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:50:54,336 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-29 08:50:54,336 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:50:54,336 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 578 [2020-10-29 08:50:54,338 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:50:54,339 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:50:54,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 08:50:54,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 08:50:54,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-29 08:50:54,340 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-29 08:50:54,533 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 08:50:54,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:50:54,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:50:54,586 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:50:54,586 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 08:50:54,586 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:50:54,587 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 39 [2020-10-29 08:50:54,587 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:50:54,587 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:50:54,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 08:50:54,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 08:50:54,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 08:50:54,588 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 08:50:54,617 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 08:50:54,618 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1451638076] [2020-10-29 08:50:54,621 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 08:50:54,621 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 08:50:54,623 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445981391] [2020-10-29 08:50:54,628 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 08:50:54,629 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 08:50:54,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 08:50:54,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-29 08:50:54,650 INFO L87 Difference]: Start difference. First operand 1781 states. Second operand 5 states. [2020-10-29 08:51:24,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 08:51:24,809 INFO L93 Difference]: Finished difference Result 5091 states and 9567 transitions. [2020-10-29 08:51:24,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 08:51:24,814 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 28 [2020-10-29 08:51:24,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 08:51:24,872 INFO L225 Difference]: With dead ends: 5091 [2020-10-29 08:51:24,872 INFO L226 Difference]: Without dead ends: 3246 [2020-10-29 08:51:24,892 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-29 08:51:24,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3246 states. [2020-10-29 08:51:25,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3246 to 3179. [2020-10-29 08:51:25,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3179 states. [2020-10-29 08:51:25,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3179 states to 3179 states and 5850 transitions. [2020-10-29 08:51:25,182 INFO L78 Accepts]: Start accepts. Automaton has 3179 states and 5850 transitions. Word has length 28 [2020-10-29 08:51:25,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 08:51:25,183 INFO L481 AbstractCegarLoop]: Abstraction has 3179 states and 5850 transitions. [2020-10-29 08:51:25,183 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 08:51:25,184 INFO L276 IsEmpty]: Start isEmpty. Operand 3179 states and 5850 transitions. [2020-10-29 08:51:25,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-10-29 08:51:25,189 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 08:51:25,190 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 08:51:25,190 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-29 08:51:25,190 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 08:51:25,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 08:51:25,191 INFO L82 PathProgramCache]: Analyzing trace with hash -489703886, now seen corresponding path program 1 times [2020-10-29 08:51:25,192 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 08:51:25,192 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [641008944] [2020-10-29 08:51:25,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 08:51:25,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:51:25,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:51:25,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:51:25,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:51:26,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:51:27,067 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:51:27,069 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 111 [2020-10-29 08:51:27,072 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 08:51:27,073 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1823 [2020-10-29 08:51:27,074 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:51:27,074 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:51:27,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 08:51:27,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 08:51:27,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-10-29 08:51:27,076 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-29 08:51:27,205 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 08:51:27,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:51:27,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:51:27,230 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:51:27,230 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 08:51:27,230 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:51:27,230 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-29 08:51:27,231 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:51:27,231 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:51:27,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 08:51:27,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 08:51:27,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 08:51:27,232 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:51:27,259 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-29 08:51:27,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:51:27,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:51:27,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:51:27,525 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:51:27,525 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-29 08:51:27,525 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 08:51:27,525 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 236 [2020-10-29 08:51:27,526 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:51:27,526 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:51:27,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 08:51:27,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-29 08:51:27,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-29 08:51:27,527 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 08:51:27,638 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 08:51:27,639 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [641008944] [2020-10-29 08:51:27,639 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 08:51:27,639 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 08:51:27,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257060214] [2020-10-29 08:51:27,642 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 08:51:27,643 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 08:51:27,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 08:51:27,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-29 08:51:27,647 INFO L87 Difference]: Start difference. First operand 3179 states and 5850 transitions. Second operand 7 states. [2020-10-29 08:52:21,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 08:52:21,880 INFO L93 Difference]: Finished difference Result 9523 states and 17581 transitions. [2020-10-29 08:52:21,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-29 08:52:21,882 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 99 [2020-10-29 08:52:21,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 08:52:21,928 INFO L225 Difference]: With dead ends: 9523 [2020-10-29 08:52:21,929 INFO L226 Difference]: Without dead ends: 6350 [2020-10-29 08:52:21,943 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-29 08:52:21,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6350 states. [2020-10-29 08:52:22,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6350 to 6240. [2020-10-29 08:52:22,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6240 states. [2020-10-29 08:52:22,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6240 states to 6240 states and 9742 transitions. [2020-10-29 08:52:22,213 INFO L78 Accepts]: Start accepts. Automaton has 6240 states and 9742 transitions. Word has length 99 [2020-10-29 08:52:22,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 08:52:22,214 INFO L481 AbstractCegarLoop]: Abstraction has 6240 states and 9742 transitions. [2020-10-29 08:52:22,214 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 08:52:22,214 INFO L276 IsEmpty]: Start isEmpty. Operand 6240 states and 9742 transitions. [2020-10-29 08:52:22,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-10-29 08:52:22,226 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 08:52:22,227 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 08:52:22,227 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-29 08:52:22,227 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 08:52:22,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 08:52:22,230 INFO L82 PathProgramCache]: Analyzing trace with hash 215334079, now seen corresponding path program 1 times [2020-10-29 08:52:22,230 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 08:52:22,231 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1644394307] [2020-10-29 08:52:22,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 08:52:22,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:52:22,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:52:22,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:52:23,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:52:23,630 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:52:23,631 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 118 [2020-10-29 08:52:23,634 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 08:52:23,634 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1332 [2020-10-29 08:52:23,635 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:52:23,635 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:52:23,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 08:52:23,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 08:52:23,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 84 [2020-10-29 08:52:23,636 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:52:23,840 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-29 08:52:23,841 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 08:52:23,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:52:23,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:52:23,877 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:52:23,878 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 08:52:23,878 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:52:23,878 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-10-29 08:52:23,878 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:52:23,878 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:52:23,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 08:52:23,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 08:52:23,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 08:52:23,879 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:52:23,929 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-29 08:52:23,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:52:23,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:52:24,125 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:52:24,125 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-29 08:52:24,126 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:52:24,126 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 173 [2020-10-29 08:52:24,126 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:52:24,126 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:52:24,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 08:52:24,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-29 08:52:24,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 79 [2020-10-29 08:52:24,128 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 08:52:24,271 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 08:52:24,272 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1644394307] [2020-10-29 08:52:24,272 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 08:52:24,273 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 08:52:24,273 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961748614] [2020-10-29 08:52:24,274 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 08:52:24,274 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 08:52:24,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 08:52:24,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-29 08:52:24,276 INFO L87 Difference]: Start difference. First operand 6240 states and 9742 transitions. Second operand 7 states. [2020-10-29 08:52:24,444 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-29 08:52:32,622 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-29 08:53:24,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 08:53:24,195 INFO L93 Difference]: Finished difference Result 15808 states and 24807 transitions. [2020-10-29 08:53:24,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-29 08:53:24,200 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 106 [2020-10-29 08:53:24,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 08:53:24,255 INFO L225 Difference]: With dead ends: 15808 [2020-10-29 08:53:24,255 INFO L226 Difference]: Without dead ends: 9574 [2020-10-29 08:53:24,272 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-29 08:53:24,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9574 states. [2020-10-29 08:53:24,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9574 to 9327. [2020-10-29 08:53:24,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9327 states. [2020-10-29 08:53:24,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9327 states to 9327 states and 13681 transitions. [2020-10-29 08:53:24,691 INFO L78 Accepts]: Start accepts. Automaton has 9327 states and 13681 transitions. Word has length 106 [2020-10-29 08:53:24,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 08:53:24,698 INFO L481 AbstractCegarLoop]: Abstraction has 9327 states and 13681 transitions. [2020-10-29 08:53:24,699 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 08:53:24,699 INFO L276 IsEmpty]: Start isEmpty. Operand 9327 states and 13681 transitions. [2020-10-29 08:53:24,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-10-29 08:53:24,705 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 08:53:24,706 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 08:53:24,706 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-29 08:53:24,709 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 08:53:24,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 08:53:24,711 INFO L82 PathProgramCache]: Analyzing trace with hash -1158927119, now seen corresponding path program 1 times [2020-10-29 08:53:24,711 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 08:53:24,712 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [210007183] [2020-10-29 08:53:24,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 08:53:24,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:53:24,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:53:25,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:53:25,786 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:53:25,786 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 126 [2020-10-29 08:53:25,786 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 08:53:25,786 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1028 [2020-10-29 08:53:25,787 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:53:25,787 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:53:25,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 08:53:25,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 08:53:25,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 90 [2020-10-29 08:53:25,788 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 08:53:25,936 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 08:53:25,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:53:25,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:53:25,962 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:53:25,962 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 08:53:25,962 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:53:25,962 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-29 08:53:25,963 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:53:25,963 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:53:25,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 08:53:25,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 08:53:25,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 08:53:25,963 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:53:26,003 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-29 08:53:26,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:53:26,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:53:26,181 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:53:26,181 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-29 08:53:26,181 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:53:26,182 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 149 [2020-10-29 08:53:26,182 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:53:26,182 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:53:26,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 08:53:26,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-29 08:53:26,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 87 [2020-10-29 08:53:26,183 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:53:26,297 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 08:53:26,298 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [210007183] [2020-10-29 08:53:26,298 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 08:53:26,298 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 08:53:26,298 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338044140] [2020-10-29 08:53:26,300 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 08:53:26,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 08:53:26,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 08:53:26,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-29 08:53:26,313 INFO L87 Difference]: Start difference. First operand 9327 states and 13681 transitions. Second operand 7 states. [2020-10-29 08:53:26,498 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 68