/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_label41.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-29 08:53:24,477 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-29 08:53:24,480 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-29 08:53:24,525 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-29 08:53:24,526 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-29 08:53:24,528 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-29 08:53:24,530 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-29 08:53:24,533 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-29 08:53:24,535 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-29 08:53:24,537 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-29 08:53:24,538 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-29 08:53:24,540 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-29 08:53:24,541 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-29 08:53:24,542 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-29 08:53:24,544 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-29 08:53:24,546 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-29 08:53:24,547 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-29 08:53:24,548 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-29 08:53:24,551 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-29 08:53:24,554 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-29 08:53:24,556 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-29 08:53:24,558 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-29 08:53:24,560 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-29 08:53:24,562 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-29 08:53:24,581 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-29 08:53:24,582 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-29 08:53:24,586 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-29 08:53:24,589 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-29 08:53:24,590 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-29 08:53:24,593 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-29 08:53:24,594 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-29 08:53:24,595 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-29 08:53:24,596 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-29 08:53:24,598 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-29 08:53:24,600 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-29 08:53:24,601 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-29 08:53:24,602 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-29 08:53:24,602 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-29 08:53:24,603 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-29 08:53:24,605 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-29 08:53:24,606 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-29 08:53:24,608 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 08:53:24,677 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-29 08:53:24,678 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-29 08:53:24,683 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-29 08:53:24,683 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-29 08:53:24,684 INFO L138 SettingsManager]: * Use SBE=true [2020-10-29 08:53:24,684 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-29 08:53:24,685 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-29 08:53:24,685 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-29 08:53:24,685 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-29 08:53:24,685 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-29 08:53:24,686 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-29 08:53:24,687 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-29 08:53:24,687 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-29 08:53:24,687 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-29 08:53:24,687 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-29 08:53:24,688 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-29 08:53:24,688 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-29 08:53:24,688 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-29 08:53:24,689 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-29 08:53:24,689 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-29 08:53:24,689 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-29 08:53:24,689 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 08:53:24,690 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-29 08:53:24,690 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-29 08:53:24,690 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-29 08:53:24,690 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-29 08:53:24,690 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-29 08:53:24,691 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-29 08:53:24,691 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-29 08:53:24,691 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true;unknown-allowed=true; [2020-10-29 08:53:25,164 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-29 08:53:25,195 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-29 08:53:25,199 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-29 08:53:25,200 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-29 08:53:25,201 INFO L275 PluginConnector]: CDTParser initialized [2020-10-29 08:53:25,203 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem19_label41.c [2020-10-29 08:53:25,291 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/fdcb80f7f/151c2b397c4749c198967115e491fabf/FLAG655b85ddc [2020-10-29 08:53:26,669 INFO L306 CDTParser]: Found 1 translation units. [2020-10-29 08:53:26,670 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem19_label41.c [2020-10-29 08:53:26,750 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/fdcb80f7f/151c2b397c4749c198967115e491fabf/FLAG655b85ddc [2020-10-29 08:53:26,815 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/fdcb80f7f/151c2b397c4749c198967115e491fabf [2020-10-29 08:53:26,820 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-29 08:53:26,829 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-29 08:53:26,831 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-29 08:53:26,831 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-29 08:53:26,836 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-29 08:53:26,837 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 08:53:26" (1/1) ... [2020-10-29 08:53:26,842 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2d667cec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:53:26, skipping insertion in model container [2020-10-29 08:53:26,843 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 08:53:26" (1/1) ... [2020-10-29 08:53:26,852 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-29 08:53:27,141 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-29 08:53:29,495 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 08:53:29,515 INFO L203 MainTranslator]: Completed pre-run [2020-10-29 08:53:30,585 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 08:53:30,655 INFO L208 MainTranslator]: Completed translation [2020-10-29 08:53:30,657 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:53:30 WrapperNode [2020-10-29 08:53:30,657 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-29 08:53:30,658 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-29 08:53:30,659 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-29 08:53:30,659 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-29 08:53:30,678 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:53:30" (1/1) ... [2020-10-29 08:53:30,681 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:53:30" (1/1) ... [2020-10-29 08:53:30,899 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:53:30" (1/1) ... [2020-10-29 08:53:30,899 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:53:30" (1/1) ... [2020-10-29 08:53:31,148 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:53:30" (1/1) ... [2020-10-29 08:53:31,212 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:53:30" (1/1) ... [2020-10-29 08:53:31,420 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:53:30" (1/1) ... [2020-10-29 08:53:31,541 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-29 08:53:31,544 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-29 08:53:31,545 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-29 08:53:31,545 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-29 08:53:31,546 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:53:30" (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 08:53:31,649 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-29 08:53:31,649 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-29 08:53:31,650 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-29 08:53:31,650 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-29 08:53:31,651 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-29 08:53:31,651 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2020-10-29 08:53:31,651 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2020-10-29 08:53:31,651 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output5 [2020-10-29 08:53:31,651 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output6 [2020-10-29 08:53:31,651 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-29 08:53:31,653 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-29 08:53:31,653 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-29 08:53:31,653 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2020-10-29 08:53:31,653 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2020-10-29 08:53:31,653 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output5 [2020-10-29 08:53:31,654 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output6 [2020-10-29 08:53:31,655 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-29 08:53:31,655 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-29 08:53:31,655 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-29 08:53:31,655 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-29 08:53:31,655 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-29 08:53:31,656 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-29 08:53:31,656 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-29 08:53:31,656 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-29 08:53:31,656 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-29 08:53:31,656 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-29 08:53:31,657 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-29 08:53:31,657 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-29 08:53:31,657 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-29 08:53:47,149 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-29 08:53:47,149 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-29 08:53:47,157 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 08:53:47 BoogieIcfgContainer [2020-10-29 08:53:47,157 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-29 08:53:47,160 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-29 08:53:47,160 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-29 08:53:47,167 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-29 08:53:47,168 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.10 08:53:26" (1/3) ... [2020-10-29 08:53:47,170 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2fb00634 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 08:53:47, skipping insertion in model container [2020-10-29 08:53:47,170 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:53:30" (2/3) ... [2020-10-29 08:53:47,171 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2fb00634 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 08:53:47, skipping insertion in model container [2020-10-29 08:53:47,171 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 08:53:47" (3/3) ... [2020-10-29 08:53:47,173 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem19_label41.c [2020-10-29 08:53:47,188 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-29 08:53:47,196 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-29 08:53:47,213 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-29 08:53:47,272 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-29 08:53:47,272 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-29 08:53:47,272 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-29 08:53:47,272 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-29 08:53:47,272 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-29 08:53:47,272 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-29 08:53:47,273 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-29 08:53:47,273 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-29 08:53:47,342 INFO L276 IsEmpty]: Start isEmpty. Operand 1781 states. [2020-10-29 08:53:47,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-29 08:53:47,349 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 08:53:47,350 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 08:53:47,351 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 08:53:47,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 08:53:47,364 INFO L82 PathProgramCache]: Analyzing trace with hash -1524423826, now seen corresponding path program 1 times [2020-10-29 08:53:47,376 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 08:53:47,377 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [155666807] [2020-10-29 08:53:47,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 08:53:47,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:53:47,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:53:48,288 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:53:48,289 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-29 08:53:48,289 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:53:48,289 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 641 [2020-10-29 08:53:48,292 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:53:48,293 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:53:48,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 08:53:48,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 08:53:48,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-29 08:53:48,294 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-29 08:53:48,462 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 08:53:48,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:53:48,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:53:48,554 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:53:48,555 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 08:53:48,555 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:53:48,555 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 66 [2020-10-29 08:53:48,555 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:53:48,555 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:53:48,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 08:53:48,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 08:53:48,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 08:53:48,556 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:53:48,581 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 08:53:48,582 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [155666807] [2020-10-29 08:53:48,585 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 08:53:48,586 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-29 08:53:48,589 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17566422] [2020-10-29 08:53:48,596 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 08:53:48,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 08:53:48,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 08:53:48,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 08:53:48,625 INFO L87 Difference]: Start difference. First operand 1781 states. Second operand 4 states. [2020-10-29 08:54:23,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 08:54:23,451 INFO L93 Difference]: Finished difference Result 5116 states and 9607 transitions. [2020-10-29 08:54:23,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 08:54:23,456 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2020-10-29 08:54:23,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 08:54:23,527 INFO L225 Difference]: With dead ends: 5116 [2020-10-29 08:54:23,527 INFO L226 Difference]: Without dead ends: 3271 [2020-10-29 08:54:23,553 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 08:54:23,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3271 states. [2020-10-29 08:54:23,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3271 to 3200. [2020-10-29 08:54:23,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3200 states. [2020-10-29 08:54:23,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3200 states to 3200 states and 5484 transitions. [2020-10-29 08:54:23,858 INFO L78 Accepts]: Start accepts. Automaton has 3200 states and 5484 transitions. Word has length 13 [2020-10-29 08:54:23,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 08:54:23,858 INFO L481 AbstractCegarLoop]: Abstraction has 3200 states and 5484 transitions. [2020-10-29 08:54:23,858 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 08:54:23,859 INFO L276 IsEmpty]: Start isEmpty. Operand 3200 states and 5484 transitions. [2020-10-29 08:54:23,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-29 08:54:23,864 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 08:54:23,865 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-29 08:54:23,865 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-29 08:54:23,865 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 08:54:23,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 08:54:23,866 INFO L82 PathProgramCache]: Analyzing trace with hash -1349691703, now seen corresponding path program 1 times [2020-10-29 08:54:23,867 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 08:54:23,867 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1756869467] [2020-10-29 08:54:23,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 08:54:23,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:54:23,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:54:24,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:54:25,453 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:54:25,454 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 97 [2020-10-29 08:54:25,456 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 08:54:25,457 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1526 [2020-10-29 08:54:25,462 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:54:25,463 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:54:25,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 08:54:25,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 08:54:25,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-10-29 08:54:25,465 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-29 08:54:25,736 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-29 08:54:25,739 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 08:54:25,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:54:25,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:54:25,786 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:54:25,796 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 08:54:25,796 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:54:25,797 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 33 [2020-10-29 08:54:25,797 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:54:25,797 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:54:25,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 08:54:25,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 08:54:25,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 08:54:25,798 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 08:54:25,830 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-29 08:54:25,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:54:25,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:54:26,102 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:54:26,102 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-29 08:54:26,102 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:54:26,102 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 247 [2020-10-29 08:54:26,103 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:54:26,103 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:54:26,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 08:54:26,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-29 08:54:26,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 73 [2020-10-29 08:54:26,104 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 08:54:26,256 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 08:54:26,257 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1756869467] [2020-10-29 08:54:26,257 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 08:54:26,257 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 08:54:26,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125912887] [2020-10-29 08:54:26,261 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 08:54:26,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 08:54:26,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 08:54:26,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-29 08:54:26,265 INFO L87 Difference]: Start difference. First operand 3200 states and 5484 transitions. Second operand 7 states. [2020-10-29 08:54:26,434 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-10-29 08:55:18,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 08:55:18,279 INFO L93 Difference]: Finished difference Result 9559 states and 16479 transitions. [2020-10-29 08:55:18,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-29 08:55:18,282 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 85 [2020-10-29 08:55:18,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 08:55:18,329 INFO L225 Difference]: With dead ends: 9559 [2020-10-29 08:55:18,330 INFO L226 Difference]: Without dead ends: 6365 [2020-10-29 08:55:18,343 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-29 08:55:18,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6365 states. [2020-10-29 08:55:18,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6365 to 6256. [2020-10-29 08:55:18,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6256 states. [2020-10-29 08:55:18,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6256 states to 6256 states and 10366 transitions. [2020-10-29 08:55:18,619 INFO L78 Accepts]: Start accepts. Automaton has 6256 states and 10366 transitions. Word has length 85 [2020-10-29 08:55:18,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 08:55:18,620 INFO L481 AbstractCegarLoop]: Abstraction has 6256 states and 10366 transitions. [2020-10-29 08:55:18,620 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 08:55:18,620 INFO L276 IsEmpty]: Start isEmpty. Operand 6256 states and 10366 transitions. [2020-10-29 08:55:18,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-10-29 08:55:18,627 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 08:55:18,628 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-29 08:55:18,628 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-29 08:55:18,629 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 08:55:18,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 08:55:18,631 INFO L82 PathProgramCache]: Analyzing trace with hash 1206311414, now seen corresponding path program 1 times [2020-10-29 08:55:18,631 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 08:55:18,633 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1286382842] [2020-10-29 08:55:18,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 08:55:18,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:55:18,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:55:18,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:55:19,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:55:19,766 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:55:19,767 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 100 [2020-10-29 08:55:19,767 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 08:55:19,767 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1087 [2020-10-29 08:55:19,767 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:55:19,767 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:55:19,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 08:55:19,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 08:55:19,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 81 [2020-10-29 08:55:19,768 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:55:19,921 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-29 08:55:19,923 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 08:55:19,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:55:19,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:55:19,955 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:55:19,956 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 08:55:19,956 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:55:19,957 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-29 08:55:19,957 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:55:19,957 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:55:19,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 08:55:19,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 08:55:19,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 08:55:19,958 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 08:55:20,011 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-29 08:55:20,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:55:20,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:55:20,370 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:55:20,370 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-29 08:55:20,371 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:55:20,371 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 333 [2020-10-29 08:55:20,371 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:55:20,371 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:55:20,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 08:55:20,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-29 08:55:20,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-29 08:55:20,372 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 08:55:20,469 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 08:55:20,470 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1286382842] [2020-10-29 08:55:20,470 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 08:55:20,470 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 08:55:20,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275488167] [2020-10-29 08:55:20,471 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 08:55:20,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 08:55:20,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 08:55:20,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-29 08:55:20,472 INFO L87 Difference]: Start difference. First operand 6256 states and 10366 transitions. Second operand 7 states. [2020-10-29 08:55:20,626 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-29 08:56:17,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 08:56:17,787 INFO L93 Difference]: Finished difference Result 18702 states and 31284 transitions. [2020-10-29 08:56:17,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-29 08:56:17,790 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 88 [2020-10-29 08:56:17,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 08:56:17,863 INFO L225 Difference]: With dead ends: 18702 [2020-10-29 08:56:17,863 INFO L226 Difference]: Without dead ends: 12452 [2020-10-29 08:56:17,883 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-29 08:56:17,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12452 states. [2020-10-29 08:56:18,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12452 to 12183. [2020-10-29 08:56:18,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12183 states. [2020-10-29 08:56:18,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12183 states to 12183 states and 17442 transitions. [2020-10-29 08:56:18,239 INFO L78 Accepts]: Start accepts. Automaton has 12183 states and 17442 transitions. Word has length 88 [2020-10-29 08:56:18,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 08:56:18,242 INFO L481 AbstractCegarLoop]: Abstraction has 12183 states and 17442 transitions. [2020-10-29 08:56:18,243 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 08:56:18,244 INFO L276 IsEmpty]: Start isEmpty. Operand 12183 states and 17442 transitions. [2020-10-29 08:56:18,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-10-29 08:56:18,254 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 08:56:18,254 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 08:56:18,255 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-29 08:56:18,255 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 08:56:18,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 08:56:18,256 INFO L82 PathProgramCache]: Analyzing trace with hash -1884174664, now seen corresponding path program 1 times [2020-10-29 08:56:18,256 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 08:56:18,259 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [746858189] [2020-10-29 08:56:18,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 08:56:18,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:56:18,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:56:18,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:56:19,533 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:56:19,534 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 126 [2020-10-29 08:56:19,534 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 08:56:19,534 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1204 [2020-10-29 08:56:19,534 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:56:19,535 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:56:19,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 08:56:19,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 08:56:19,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 107 [2020-10-29 08:56:19,535 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:56:19,695 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-29 08:56:19,697 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 08:56:19,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:56:19,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:56:19,722 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:56:19,722 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 08:56:19,723 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:56:19,723 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-29 08:56:19,723 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:56:19,723 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:56:19,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 08:56:19,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 08:56:19,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 08:56:19,724 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:56:19,775 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-29 08:56:19,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:56:19,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:56:20,026 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:56:20,026 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-10-29 08:56:20,026 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:56:20,027 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 226 [2020-10-29 08:56:20,027 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:56:20,027 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:56:20,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 08:56:20,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-29 08:56:20,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 102 [2020-10-29 08:56:20,028 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 08:56:20,259 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 08:56:20,260 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [746858189] [2020-10-29 08:56:20,260 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 08:56:20,260 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 08:56:20,260 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056436947] [2020-10-29 08:56:20,262 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 08:56:20,263 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 08:56:20,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 08:56:20,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-29 08:56:20,264 INFO L87 Difference]: Start difference. First operand 12183 states and 17442 transitions. Second operand 7 states. [2020-10-29 08:56:20,440 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-10-29 08:57:25,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 08:57:25,393 INFO L93 Difference]: Finished difference Result 30838 states and 44348 transitions. [2020-10-29 08:57:25,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-29 08:57:25,397 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 114 [2020-10-29 08:57:25,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 08:57:25,487 INFO L225 Difference]: With dead ends: 30838 [2020-10-29 08:57:25,488 INFO L226 Difference]: Without dead ends: 18661 [2020-10-29 08:57:25,530 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-29 08:57:25,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18661 states. [2020-10-29 08:57:26,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18661 to 17943. [2020-10-29 08:57:26,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17943 states. [2020-10-29 08:57:26,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17943 states to 17943 states and 23678 transitions. [2020-10-29 08:57:26,060 INFO L78 Accepts]: Start accepts. Automaton has 17943 states and 23678 transitions. Word has length 114 [2020-10-29 08:57:26,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 08:57:26,061 INFO L481 AbstractCegarLoop]: Abstraction has 17943 states and 23678 transitions. [2020-10-29 08:57:26,061 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 08:57:26,061 INFO L276 IsEmpty]: Start isEmpty. Operand 17943 states and 23678 transitions. [2020-10-29 08:57:26,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2020-10-29 08:57:26,064 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 08:57:26,065 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:57:26,065 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-29 08:57:26,065 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 08:57:26,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 08:57:26,066 INFO L82 PathProgramCache]: Analyzing trace with hash 1907960806, now seen corresponding path program 1 times [2020-10-29 08:57:26,066 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 08:57:26,067 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [921210083] [2020-10-29 08:57:26,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 08:57:26,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:57:26,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:57:26,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking...