/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=SHALLOWEST --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_label51.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 00:51:57,530 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 00:51:57,534 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 00:51:57,577 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 00:51:57,578 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 00:51:57,580 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 00:51:57,583 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 00:51:57,604 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 00:51:57,610 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 00:51:57,618 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 00:51:57,620 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 00:51:57,624 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 00:51:57,625 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 00:51:57,630 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 00:51:57,635 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 00:51:57,639 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 00:51:57,641 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 00:51:57,643 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 00:51:57,654 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 00:51:57,665 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 00:51:57,668 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 00:51:57,670 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 00:51:57,673 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 00:51:57,677 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 00:51:57,690 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 00:51:57,690 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 00:51:57,691 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 00:51:57,692 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 00:51:57,693 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 00:51:57,694 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 00:51:57,695 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 00:51:57,696 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 00:51:57,698 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 00:51:57,700 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 00:51:57,702 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 00:51:57,703 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 00:51:57,704 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 00:51:57,704 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 00:51:57,704 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 00:51:57,706 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 00:51:57,707 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 00:51:57,709 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 [2020-10-27 00:51:57,742 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 00:51:57,742 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 00:51:57,744 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 00:51:57,745 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 00:51:57,745 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 00:51:57,745 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 00:51:57,746 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 00:51:57,746 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 00:51:57,746 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 00:51:57,746 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 00:51:57,747 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 00:51:57,747 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 00:51:57,747 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 00:51:57,747 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 00:51:57,748 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 00:51:57,748 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 00:51:57,748 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 00:51:57,749 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 00:51:57,749 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 00:51:57,749 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 00:51:57,750 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 00:51:57,750 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 00:51:57,750 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 00:51:57,750 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 00:51:57,751 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 00:51:57,751 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 00:51:57,751 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 00:51:57,751 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 00:51:57,751 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 00:51:57,752 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 00:51:58,230 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 00:51:58,271 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 00:51:58,277 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 00:51:58,279 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 00:51:58,280 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 00:51:58,281 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem19_label51.c [2020-10-27 00:51:58,385 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2a0a9447b/6d802e1d88fd4a5e9f520dfe323c8499/FLAG129c5dac2 [2020-10-27 00:51:59,914 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 00:51:59,915 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem19_label51.c [2020-10-27 00:51:59,982 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2a0a9447b/6d802e1d88fd4a5e9f520dfe323c8499/FLAG129c5dac2 [2020-10-27 00:52:00,095 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2a0a9447b/6d802e1d88fd4a5e9f520dfe323c8499 [2020-10-27 00:52:00,100 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 00:52:00,111 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 00:52:00,117 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 00:52:00,118 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 00:52:00,124 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 00:52:00,126 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 12:52:00" (1/1) ... [2020-10-27 00:52:00,141 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@334303ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:52:00, skipping insertion in model container [2020-10-27 00:52:00,141 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 12:52:00" (1/1) ... [2020-10-27 00:52:00,152 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 00:52:00,404 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 00:52:03,149 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 00:52:03,173 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 00:52:04,692 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 00:52:04,759 INFO L208 MainTranslator]: Completed translation [2020-10-27 00:52:04,760 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:52:04 WrapperNode [2020-10-27 00:52:04,761 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 00:52:04,764 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 00:52:04,764 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 00:52:04,764 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 00:52:04,780 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:52:04" (1/1) ... [2020-10-27 00:52:04,780 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:52:04" (1/1) ... [2020-10-27 00:52:04,973 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:52:04" (1/1) ... [2020-10-27 00:52:04,974 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:52:04" (1/1) ... [2020-10-27 00:52:05,353 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:52:04" (1/1) ... [2020-10-27 00:52:05,435 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:52:04" (1/1) ... [2020-10-27 00:52:05,737 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:52:04" (1/1) ... [2020-10-27 00:52:05,961 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 00:52:05,964 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 00:52:05,965 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 00:52:05,965 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 00:52:05,966 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:52:04" (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 [2020-10-27 00:52:06,087 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 00:52:06,088 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 00:52:06,089 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 00:52:06,090 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-27 00:52:06,090 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-27 00:52:06,090 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2020-10-27 00:52:06,090 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2020-10-27 00:52:06,090 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output5 [2020-10-27 00:52:06,091 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output6 [2020-10-27 00:52:06,091 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 00:52:06,092 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-27 00:52:06,092 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-27 00:52:06,092 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2020-10-27 00:52:06,092 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2020-10-27 00:52:06,092 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output5 [2020-10-27 00:52:06,093 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output6 [2020-10-27 00:52:06,094 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 00:52:06,094 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 00:52:06,094 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 00:52:06,094 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 00:52:06,094 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 00:52:06,094 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-27 00:52:06,095 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 00:52:06,095 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 00:52:06,095 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 00:52:06,095 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 00:52:06,095 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 00:52:06,095 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 00:52:06,096 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 00:52:23,603 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 00:52:23,604 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-27 00:52:23,611 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 12:52:23 BoogieIcfgContainer [2020-10-27 00:52:23,611 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 00:52:23,619 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 00:52:23,619 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 00:52:23,624 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 00:52:23,624 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 12:52:00" (1/3) ... [2020-10-27 00:52:23,626 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23758a98 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 12:52:23, skipping insertion in model container [2020-10-27 00:52:23,626 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:52:04" (2/3) ... [2020-10-27 00:52:23,626 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23758a98 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 12:52:23, skipping insertion in model container [2020-10-27 00:52:23,627 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 12:52:23" (3/3) ... [2020-10-27 00:52:23,629 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem19_label51.c [2020-10-27 00:52:23,646 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 00:52:23,656 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 00:52:23,672 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 00:52:23,719 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 00:52:23,720 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 00:52:23,720 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 00:52:23,720 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 00:52:23,720 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 00:52:23,720 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 00:52:23,720 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 00:52:23,721 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 00:52:23,781 INFO L276 IsEmpty]: Start isEmpty. Operand 1781 states. [2020-10-27 00:52:23,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-27 00:52:23,790 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:52:23,792 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] [2020-10-27 00:52:23,793 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:52:23,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:52:23,802 INFO L82 PathProgramCache]: Analyzing trace with hash -2072453099, now seen corresponding path program 1 times [2020-10-27 00:52:23,815 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:52:23,815 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [204768378] [2020-10-27 00:52:23,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:52:24,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:52:24,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:52:24,823 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:52:24,824 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-27 00:52:24,824 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:52:24,824 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 765 [2020-10-27 00:52:24,826 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:52:24,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 00:52:24,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 00:52:24,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-27 00:52:24,829 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-27 00:52:25,066 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:52:25,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:52:25,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:52:25,153 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:52:25,153 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:52:25,153 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:52:25,154 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 59 [2020-10-27 00:52:25,154 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:52:25,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:52:25,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:52:25,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 00:52:25,155 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:52:25,198 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 00:52:25,199 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [204768378] [2020-10-27 00:52:25,202 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 00:52:25,202 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-27 00:52:25,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521133919] [2020-10-27 00:52:25,212 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 00:52:25,212 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:52:25,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 00:52:25,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 00:52:25,247 INFO L87 Difference]: Start difference. First operand 1781 states. Second operand 4 states. [2020-10-27 00:52:56,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:52:56,878 INFO L93 Difference]: Finished difference Result 5100 states and 9572 transitions. [2020-10-27 00:52:56,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 00:52:56,882 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 24 [2020-10-27 00:52:56,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:52:56,937 INFO L225 Difference]: With dead ends: 5100 [2020-10-27 00:52:56,937 INFO L226 Difference]: Without dead ends: 3255 [2020-10-27 00:52:56,954 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 00:52:56,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3255 states. [2020-10-27 00:52:57,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3255 to 3209. [2020-10-27 00:52:57,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3209 states. [2020-10-27 00:52:57,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3209 states to 3209 states and 5178 transitions. [2020-10-27 00:52:57,169 INFO L78 Accepts]: Start accepts. Automaton has 3209 states and 5178 transitions. Word has length 24 [2020-10-27 00:52:57,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:52:57,170 INFO L481 AbstractCegarLoop]: Abstraction has 3209 states and 5178 transitions. [2020-10-27 00:52:57,170 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 00:52:57,171 INFO L276 IsEmpty]: Start isEmpty. Operand 3209 states and 5178 transitions. [2020-10-27 00:52:57,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-10-27 00:52:57,176 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:52:57,176 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-27 00:52:57,176 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 00:52:57,177 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:52:57,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:52:57,178 INFO L82 PathProgramCache]: Analyzing trace with hash 1619879660, now seen corresponding path program 1 times [2020-10-27 00:52:57,178 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:52:57,178 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [557182172] [2020-10-27 00:52:57,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:52:57,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:52:57,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:52:57,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:52:58,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:52:58,591 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:52:58,591 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 111 [2020-10-27 00:52:58,591 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 00:52:58,592 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1358 [2020-10-27 00:52:58,593 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:52:58,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 00:52:58,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 00:52:58,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 102 [2020-10-27 00:52:58,594 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 00:52:58,716 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:52:58,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:52:58,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:52:58,796 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:52:58,797 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:52:58,797 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:52:58,797 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 62 [2020-10-27 00:52:58,798 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:52:58,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:52:58,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:52:58,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 00:52:58,798 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:52:58,838 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:52:58,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:52:58,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:52:59,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:52:59,231 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:52:59,232 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-27 00:52:59,232 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 00:52:59,232 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 365 [2020-10-27 00:52:59,232 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:52:59,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:52:59,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:52:59,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-27 00:52:59,233 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:52:59,307 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-27 00:52:59,308 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [557182172] [2020-10-27 00:52:59,308 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 00:52:59,309 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 00:52:59,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291144758] [2020-10-27 00:52:59,311 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 00:52:59,311 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:52:59,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 00:52:59,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-27 00:52:59,312 INFO L87 Difference]: Start difference. First operand 3209 states and 5178 transitions. Second operand 6 states. [2020-10-27 00:53:42,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:53:42,448 INFO L93 Difference]: Finished difference Result 9355 states and 15228 transitions. [2020-10-27 00:53:42,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 00:53:42,453 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 99 [2020-10-27 00:53:42,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:53:42,499 INFO L225 Difference]: With dead ends: 9355 [2020-10-27 00:53:42,499 INFO L226 Difference]: Without dead ends: 6152 [2020-10-27 00:53:42,512 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-27 00:53:42,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6152 states. [2020-10-27 00:53:42,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6152 to 6133. [2020-10-27 00:53:42,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6133 states. [2020-10-27 00:53:42,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6133 states to 6133 states and 8619 transitions. [2020-10-27 00:53:42,826 INFO L78 Accepts]: Start accepts. Automaton has 6133 states and 8619 transitions. Word has length 99 [2020-10-27 00:53:42,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:53:42,827 INFO L481 AbstractCegarLoop]: Abstraction has 6133 states and 8619 transitions. [2020-10-27 00:53:42,827 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 00:53:42,827 INFO L276 IsEmpty]: Start isEmpty. Operand 6133 states and 8619 transitions. [2020-10-27 00:53:42,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2020-10-27 00:53:42,839 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:53:42,840 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 00:53:42,840 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 00:53:42,840 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:53:42,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:53:42,842 INFO L82 PathProgramCache]: Analyzing trace with hash -849017814, now seen corresponding path program 1 times [2020-10-27 00:53:42,843 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:53:42,843 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [865153457] [2020-10-27 00:53:42,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:53:42,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:53:42,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:53:43,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:53:43,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:53:44,663 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:53:44,664 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 137 [2020-10-27 00:53:44,664 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 00:53:44,665 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1761 [2020-10-27 00:53:44,665 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:53:44,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 00:53:44,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 00:53:44,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 107 [2020-10-27 00:53:44,666 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:53:44,872 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:53:44,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:53:44,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:53:44,901 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:53:44,902 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:53:44,902 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:53:44,902 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-27 00:53:44,902 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:53:44,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:53:44,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:53:44,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 00:53:44,903 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:53:44,938 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:53:44,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:53:44,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:53:45,222 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:53:45,223 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-10-27 00:53:45,223 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:53:45,223 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 253 [2020-10-27 00:53:45,223 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:53:45,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:53:45,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:53:45,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 102 [2020-10-27 00:53:45,224 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:53:45,380 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 00:53:45,382 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [865153457] [2020-10-27 00:53:45,383 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 00:53:45,383 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 00:53:45,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836288759] [2020-10-27 00:53:45,384 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 00:53:45,384 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:53:45,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 00:53:45,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 00:53:45,386 INFO L87 Difference]: Start difference. First operand 6133 states and 8619 transitions. Second operand 7 states. [2020-10-27 00:53:45,530 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-10-27 00:54:38,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:54:38,375 INFO L93 Difference]: Finished difference Result 18613 states and 26590 transitions. [2020-10-27 00:54:38,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 00:54:38,379 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 125 [2020-10-27 00:54:38,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:54:38,457 INFO L225 Difference]: With dead ends: 18613 [2020-10-27 00:54:38,457 INFO L226 Difference]: Without dead ends: 12486 [2020-10-27 00:54:38,479 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-10-27 00:54:38,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12486 states. [2020-10-27 00:54:38,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12486 to 12295. [2020-10-27 00:54:38,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12295 states. [2020-10-27 00:54:38,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12295 states to 12295 states and 15888 transitions. [2020-10-27 00:54:38,909 INFO L78 Accepts]: Start accepts. Automaton has 12295 states and 15888 transitions. Word has length 125 [2020-10-27 00:54:38,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:54:38,909 INFO L481 AbstractCegarLoop]: Abstraction has 12295 states and 15888 transitions. [2020-10-27 00:54:38,910 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 00:54:38,910 INFO L276 IsEmpty]: Start isEmpty. Operand 12295 states and 15888 transitions. [2020-10-27 00:54:38,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2020-10-27 00:54:38,912 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:54:38,912 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 00:54:38,912 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 00:54:38,912 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:54:38,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:54:38,913 INFO L82 PathProgramCache]: Analyzing trace with hash -1723862754, now seen corresponding path program 1 times [2020-10-27 00:54:38,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:54:38,914 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [845926669] [2020-10-27 00:54:38,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:54:38,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:54:38,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:54:39,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:54:39,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:54:39,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:54:40,858 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:54:40,859 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 159 [2020-10-27 00:54:40,859 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 00:54:40,859 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1897 [2020-10-27 00:54:40,860 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:54:40,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 00:54:40,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 00:54:40,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 128 [2020-10-27 00:54:40,860 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:54:41,029 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-27 00:54:41,031 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:54:41,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:54:41,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:54:41,055 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:54:41,055 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:54:41,055 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:54:41,055 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-27 00:54:41,056 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:54:41,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:54:41,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:54:41,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 00:54:41,057 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:54:41,103 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:54:41,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:54:41,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:54:41,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:54:41,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:54:41,586 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:54:41,587 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 124 [2020-10-27 00:54:41,587 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 00:54:41,587 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 447 [2020-10-27 00:54:41,587 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:54:41,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:54:41,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:54:41,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 124 [2020-10-27 00:54:41,588 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 00:54:41,754 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 00:54:41,755 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [845926669] [2020-10-27 00:54:41,755 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 00:54:41,755 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 00:54:41,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705273634] [2020-10-27 00:54:41,760 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 00:54:41,761 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:54:41,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 00:54:41,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 00:54:41,775 INFO L87 Difference]: Start difference. First operand 12295 states and 15888 transitions. Second operand 7 states. [2020-10-27 00:54:41,959 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-10-27 00:54:44,088 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 68