/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_label51.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-29 08:56:53,562 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-29 08:56:53,566 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-29 08:56:53,632 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-29 08:56:53,633 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-29 08:56:53,641 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-29 08:56:53,645 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-29 08:56:53,651 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-29 08:56:53,655 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-29 08:56:53,663 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-29 08:56:53,665 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-29 08:56:53,667 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-29 08:56:53,667 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-29 08:56:53,671 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-29 08:56:53,674 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-29 08:56:53,678 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-29 08:56:53,680 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-29 08:56:53,684 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-29 08:56:53,702 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-29 08:56:53,708 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-29 08:56:53,714 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-29 08:56:53,719 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-29 08:56:53,725 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-29 08:56:53,727 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-29 08:56:53,732 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-29 08:56:53,733 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-29 08:56:53,744 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-29 08:56:53,745 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-29 08:56:53,746 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-29 08:56:53,749 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-29 08:56:53,750 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-29 08:56:53,751 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-29 08:56:53,754 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-29 08:56:53,755 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-29 08:56:53,757 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-29 08:56:53,757 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-29 08:56:53,758 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-29 08:56:53,758 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-29 08:56:53,759 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-29 08:56:53,760 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-29 08:56:53,761 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-29 08:56:53,771 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 08:56:53,830 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-29 08:56:53,830 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-29 08:56:53,837 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-29 08:56:53,837 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-29 08:56:53,838 INFO L138 SettingsManager]: * Use SBE=true [2020-10-29 08:56:53,838 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-29 08:56:53,838 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-29 08:56:53,839 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-29 08:56:53,839 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-29 08:56:53,839 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-29 08:56:53,840 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-29 08:56:53,841 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-29 08:56:53,841 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-29 08:56:53,841 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-29 08:56:53,842 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-29 08:56:53,842 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-29 08:56:53,842 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-29 08:56:53,842 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-29 08:56:53,842 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-29 08:56:53,843 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-29 08:56:53,843 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-29 08:56:53,843 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 08:56:53,843 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-29 08:56:53,844 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-29 08:56:53,844 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-29 08:56:53,844 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-29 08:56:53,844 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-29 08:56:53,844 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-29 08:56:53,845 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-29 08:56:53,845 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true;unknown-allowed=true; [2020-10-29 08:56:54,372 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-29 08:56:54,406 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-29 08:56:54,410 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-29 08:56:54,413 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-29 08:56:54,414 INFO L275 PluginConnector]: CDTParser initialized [2020-10-29 08:56:54,415 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem19_label51.c [2020-10-29 08:56:54,540 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/77dee9a3f/f82a26d036a34b86ae1785954b844c5a/FLAG88ab608c9 [2020-10-29 08:56:55,982 INFO L306 CDTParser]: Found 1 translation units. [2020-10-29 08:56:55,984 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem19_label51.c [2020-10-29 08:56:56,083 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/77dee9a3f/f82a26d036a34b86ae1785954b844c5a/FLAG88ab608c9 [2020-10-29 08:56:56,592 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/77dee9a3f/f82a26d036a34b86ae1785954b844c5a [2020-10-29 08:56:56,599 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-29 08:56:56,610 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-29 08:56:56,618 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-29 08:56:56,618 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-29 08:56:56,624 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-29 08:56:56,626 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 08:56:56" (1/1) ... [2020-10-29 08:56:56,633 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7c76db6f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:56:56, skipping insertion in model container [2020-10-29 08:56:56,634 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 08:56:56" (1/1) ... [2020-10-29 08:56:56,644 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-29 08:56:56,915 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-29 08:56:59,379 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 08:56:59,446 INFO L203 MainTranslator]: Completed pre-run [2020-10-29 08:57:00,913 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 08:57:01,001 INFO L208 MainTranslator]: Completed translation [2020-10-29 08:57:01,003 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:57:01 WrapperNode [2020-10-29 08:57:01,004 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-29 08:57:01,006 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-29 08:57:01,007 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-29 08:57:01,007 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-29 08:57:01,026 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:57:01" (1/1) ... [2020-10-29 08:57:01,028 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:57:01" (1/1) ... [2020-10-29 08:57:01,172 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:57:01" (1/1) ... [2020-10-29 08:57:01,173 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:57:01" (1/1) ... [2020-10-29 08:57:01,482 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:57:01" (1/1) ... [2020-10-29 08:57:01,563 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:57:01" (1/1) ... [2020-10-29 08:57:01,957 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:57:01" (1/1) ... [2020-10-29 08:57:02,105 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-29 08:57:02,108 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-29 08:57:02,108 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-29 08:57:02,109 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-29 08:57:02,110 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:57:01" (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 08:57:02,295 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-29 08:57:02,295 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-29 08:57:02,296 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-29 08:57:02,296 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-29 08:57:02,296 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-29 08:57:02,296 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2020-10-29 08:57:02,296 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2020-10-29 08:57:02,297 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output5 [2020-10-29 08:57:02,297 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output6 [2020-10-29 08:57:02,297 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-29 08:57:02,297 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-29 08:57:02,297 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-29 08:57:02,297 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2020-10-29 08:57:02,298 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2020-10-29 08:57:02,298 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output5 [2020-10-29 08:57:02,298 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output6 [2020-10-29 08:57:02,298 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-29 08:57:02,299 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-29 08:57:02,299 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-29 08:57:02,299 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-29 08:57:02,299 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-29 08:57:02,300 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-29 08:57:02,300 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-29 08:57:02,300 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-29 08:57:02,300 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-29 08:57:02,300 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-29 08:57:02,300 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-29 08:57:02,301 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-29 08:57:02,301 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-29 08:57:20,145 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-29 08:57:20,146 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-29 08:57:20,152 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 08:57:20 BoogieIcfgContainer [2020-10-29 08:57:20,152 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-29 08:57:20,157 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-29 08:57:20,158 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-29 08:57:20,162 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-29 08:57:20,162 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.10 08:56:56" (1/3) ... [2020-10-29 08:57:20,163 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2bba59f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 08:57:20, skipping insertion in model container [2020-10-29 08:57:20,163 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:57:01" (2/3) ... [2020-10-29 08:57:20,164 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2bba59f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 08:57:20, skipping insertion in model container [2020-10-29 08:57:20,164 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 08:57:20" (3/3) ... [2020-10-29 08:57:20,166 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem19_label51.c [2020-10-29 08:57:20,185 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-29 08:57:20,193 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-29 08:57:20,209 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-29 08:57:20,272 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-29 08:57:20,272 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-29 08:57:20,273 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-29 08:57:20,273 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-29 08:57:20,273 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-29 08:57:20,273 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-29 08:57:20,273 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-29 08:57:20,273 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-29 08:57:20,332 INFO L276 IsEmpty]: Start isEmpty. Operand 1781 states. [2020-10-29 08:57:20,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-29 08:57:20,341 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 08:57:20,342 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] [2020-10-29 08:57:20,343 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 08:57:20,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 08:57:20,351 INFO L82 PathProgramCache]: Analyzing trace with hash -2072453099, now seen corresponding path program 1 times [2020-10-29 08:57:20,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 08:57:20,362 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1324330552] [2020-10-29 08:57:20,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 08:57:20,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:57:20,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:57:21,223 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:57:21,223 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-29 08:57:21,224 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:57:21,224 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 656 [2020-10-29 08:57:21,227 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:57:21,227 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:57:21,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 08:57:21,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 08:57:21,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-29 08:57:21,229 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-29 08:57:21,394 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 08:57:21,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:57:21,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:57:21,433 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:57:21,433 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 08:57:21,434 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:57:21,434 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-10-29 08:57:21,434 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:57:21,434 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:57:21,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 08:57:21,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 08:57:21,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 08:57:21,435 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 08:57:21,473 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 08:57:21,474 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1324330552] [2020-10-29 08:57:21,477 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 08:57:21,478 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-29 08:57:21,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896551465] [2020-10-29 08:57:21,486 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 08:57:21,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 08:57:21,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 08:57:21,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 08:57:21,517 INFO L87 Difference]: Start difference. First operand 1781 states. Second operand 4 states. [2020-10-29 08:57:21,774 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-29 08:57:59,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 08:57:59,629 INFO L93 Difference]: Finished difference Result 5100 states and 9572 transitions. [2020-10-29 08:57:59,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 08:57:59,633 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 24 [2020-10-29 08:57:59,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 08:57:59,705 INFO L225 Difference]: With dead ends: 5100 [2020-10-29 08:57:59,705 INFO L226 Difference]: Without dead ends: 3255 [2020-10-29 08:57:59,727 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 08:57:59,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3255 states. [2020-10-29 08:57:59,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3255 to 3209. [2020-10-29 08:57:59,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3209 states. [2020-10-29 08:57:59,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3209 states to 3209 states and 5178 transitions. [2020-10-29 08:57:59,994 INFO L78 Accepts]: Start accepts. Automaton has 3209 states and 5178 transitions. Word has length 24 [2020-10-29 08:57:59,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 08:57:59,996 INFO L481 AbstractCegarLoop]: Abstraction has 3209 states and 5178 transitions. [2020-10-29 08:57:59,996 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 08:57:59,996 INFO L276 IsEmpty]: Start isEmpty. Operand 3209 states and 5178 transitions. [2020-10-29 08:58:00,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-10-29 08:58:00,002 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 08:58:00,002 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] [2020-10-29 08:58:00,003 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-29 08:58:00,003 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 08:58:00,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 08:58:00,004 INFO L82 PathProgramCache]: Analyzing trace with hash 1619879660, now seen corresponding path program 1 times [2020-10-29 08:58:00,004 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 08:58:00,005 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1033096727] [2020-10-29 08:58:00,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 08:58:00,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:58:00,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:58:00,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:58:01,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:58:01,623 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:58:01,624 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 111 [2020-10-29 08:58:01,624 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 08:58:01,625 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1565 [2020-10-29 08:58:01,627 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:58:01,628 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:58:01,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 08:58:01,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 08:58:01,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 81 [2020-10-29 08:58:01,628 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-29 08:58:01,779 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 08:58:01,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:58:01,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:58:01,815 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:58:01,815 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 08:58:01,815 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:58:01,816 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-29 08:58:01,816 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:58:01,816 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:58:01,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 08:58:01,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 08:58:01,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 08:58:01,817 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 08:58:01,859 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-29 08:58:01,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:58:01,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:58:02,047 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:58:02,047 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-29 08:58:02,047 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:58:02,047 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 159 [2020-10-29 08:58:02,048 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:58:02,048 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:58:02,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 08:58:02,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-29 08:58:02,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-29 08:58:02,049 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 08:58:02,158 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 08:58:02,159 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1033096727] [2020-10-29 08:58:02,159 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 08:58:02,159 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 08:58:02,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061645389] [2020-10-29 08:58:02,163 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 08:58:02,163 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 08:58:02,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 08:58:02,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-29 08:58:02,166 INFO L87 Difference]: Start difference. First operand 3209 states and 5178 transitions. Second operand 7 states. [2020-10-29 08:58:55,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 08:58:55,645 INFO L93 Difference]: Finished difference Result 9449 states and 15356 transitions. [2020-10-29 08:58:55,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-29 08:58:55,651 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 99 [2020-10-29 08:58:55,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 08:58:55,691 INFO L225 Difference]: With dead ends: 9449 [2020-10-29 08:58:55,692 INFO L226 Difference]: Without dead ends: 6246 [2020-10-29 08:58:55,702 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 1 SyntacticMatches, 2 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 08:58:55,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6246 states. [2020-10-29 08:58:55,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6246 to 6146. [2020-10-29 08:58:55,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6146 states. [2020-10-29 08:58:55,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6146 states to 6146 states and 8623 transitions. [2020-10-29 08:58:55,934 INFO L78 Accepts]: Start accepts. Automaton has 6146 states and 8623 transitions. Word has length 99 [2020-10-29 08:58:55,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 08:58:55,936 INFO L481 AbstractCegarLoop]: Abstraction has 6146 states and 8623 transitions. [2020-10-29 08:58:55,936 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 08:58:55,936 INFO L276 IsEmpty]: Start isEmpty. Operand 6146 states and 8623 transitions. [2020-10-29 08:58:55,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2020-10-29 08:58:55,946 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 08:58:55,947 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] [2020-10-29 08:58:55,947 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-29 08:58:55,947 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 08:58:55,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 08:58:55,949 INFO L82 PathProgramCache]: Analyzing trace with hash -849017814, now seen corresponding path program 1 times [2020-10-29 08:58:55,950 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 08:58:55,950 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1941876429] [2020-10-29 08:58:55,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 08:58:56,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:58:56,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:58:56,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:58:56,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:58:57,742 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:58:57,743 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 137 [2020-10-29 08:58:57,743 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 08:58:57,743 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1733 [2020-10-29 08:58:57,744 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:58:57,744 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:58:57,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 08:58:57,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 08:58:57,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 107 [2020-10-29 08:58:57,746 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-29 08:58:57,904 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 08:58:57,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:58:57,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:58:57,925 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:58:57,926 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 08:58:57,926 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:58:57,926 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-29 08:58:57,926 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:58:57,927 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:58:57,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 08:58:57,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 08:58:57,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 08:58:57,928 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 08:58:57,965 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-29 08:58:57,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:58:58,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:58:58,253 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:58:58,254 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-10-29 08:58:58,254 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:58:58,254 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 256 [2020-10-29 08:58:58,254 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:58:58,255 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:58:58,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 08:58:58,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-29 08:58:58,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 102 [2020-10-29 08:58:58,255 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:58:58,416 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 08:58:58,417 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1941876429] [2020-10-29 08:58:58,418 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 08:58:58,418 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 08:58:58,419 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418201380] [2020-10-29 08:58:58,419 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 08:58:58,420 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 08:58:58,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 08:58:58,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-29 08:58:58,421 INFO L87 Difference]: Start difference. First operand 6146 states and 8623 transitions. Second operand 7 states. [2020-10-29 08:59:52,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 08:59:52,173 INFO L93 Difference]: Finished difference Result 18717 states and 26694 transitions. [2020-10-29 08:59:52,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-29 08:59:52,176 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 125 [2020-10-29 08:59:52,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 08:59:52,252 INFO L225 Difference]: With dead ends: 18717 [2020-10-29 08:59:52,252 INFO L226 Difference]: Without dead ends: 12577 [2020-10-29 08:59:52,278 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-29 08:59:52,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12577 states. [2020-10-29 08:59:52,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12577 to 12324. [2020-10-29 08:59:52,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12324 states. [2020-10-29 08:59:52,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12324 states to 12324 states and 15883 transitions. [2020-10-29 08:59:52,666 INFO L78 Accepts]: Start accepts. Automaton has 12324 states and 15883 transitions. Word has length 125 [2020-10-29 08:59:52,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 08:59:52,669 INFO L481 AbstractCegarLoop]: Abstraction has 12324 states and 15883 transitions. [2020-10-29 08:59:52,669 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 08:59:52,669 INFO L276 IsEmpty]: Start isEmpty. Operand 12324 states and 15883 transitions. [2020-10-29 08:59:52,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2020-10-29 08:59:52,685 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 08:59:52,685 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] [2020-10-29 08:59:52,686 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-29 08:59:52,686 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 08:59:52,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 08:59:52,687 INFO L82 PathProgramCache]: Analyzing trace with hash -1723862754, now seen corresponding path program 1 times [2020-10-29 08:59:52,687 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 08:59:52,689 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1371009456] [2020-10-29 08:59:52,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 08:59:52,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:59:52,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:59:52,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:59:53,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:59:53,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:59:54,716 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:59:54,717 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 159 [2020-10-29 08:59:54,717 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 08:59:54,717 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1895 [2020-10-29 08:59:54,718 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:59:54,718 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:59:54,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 08:59:54,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 08:59:54,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 127 [2020-10-29 08:59:54,718 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 08:59:54,862 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 08:59:54,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:59:54,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:59:54,885 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:59:54,885 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 08:59:54,885 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:59:54,885 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-29 08:59:54,886 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:59:54,886 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:59:54,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 08:59:54,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 08:59:54,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 08:59:54,888 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-29 08:59:54,927 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-29 08:59:54,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:59:54,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:59:55,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:59:55,217 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:59:55,217 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 124 [2020-10-29 08:59:55,218 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 08:59:55,218 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 265 [2020-10-29 08:59:55,218 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:59:55,218 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:59:55,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 08:59:55,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-29 08:59:55,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 124 [2020-10-29 08:59:55,219 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:59:55,365 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 08:59:55,366 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1371009456] [2020-10-29 08:59:55,366 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 08:59:55,366 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 08:59:55,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213840952] [2020-10-29 08:59:55,369 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 08:59:55,369 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 08:59:55,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 08:59:55,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-29 08:59:55,372 INFO L87 Difference]: Start difference. First operand 12324 states and 15883 transitions. Second operand 7 states. [2020-10-29 08:59:55,536 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 68