/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=DEEPEST --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_label09.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 19:20:09,653 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 19:20:09,659 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 19:20:09,717 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 19:20:09,718 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 19:20:09,725 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 19:20:09,728 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 19:20:09,733 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 19:20:09,738 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 19:20:09,746 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 19:20:09,748 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 19:20:09,750 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 19:20:09,750 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 19:20:09,755 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 19:20:09,756 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 19:20:09,759 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 19:20:09,760 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 19:20:09,761 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 19:20:09,787 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 19:20:09,793 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 19:20:09,796 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 19:20:09,798 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 19:20:09,800 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 19:20:09,802 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 19:20:09,809 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 19:20:09,809 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 19:20:09,809 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 19:20:09,811 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 19:20:09,816 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 19:20:09,818 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 19:20:09,818 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 19:20:09,819 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 19:20:09,822 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 19:20:09,823 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 19:20:09,824 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 19:20:09,824 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 19:20:09,825 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 19:20:09,825 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 19:20:09,826 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 19:20:09,827 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 19:20:09,827 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 19:20:09,836 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 19:20:09,893 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 19:20:09,893 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 19:20:09,898 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 19:20:09,898 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 19:20:09,899 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 19:20:09,899 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 19:20:09,899 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 19:20:09,899 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 19:20:09,899 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 19:20:09,900 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 19:20:09,901 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 19:20:09,901 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 19:20:09,902 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 19:20:09,902 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 19:20:09,902 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 19:20:09,902 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 19:20:09,902 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 19:20:09,903 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 19:20:09,903 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 19:20:09,903 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 19:20:09,903 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 19:20:09,903 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 19:20:09,904 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 19:20:09,904 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 19:20:09,904 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 19:20:09,904 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 19:20:09,905 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 19:20:09,905 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 19:20:09,905 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 19:20:09,905 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 19:20:10,389 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 19:20:10,417 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 19:20:10,420 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 19:20:10,422 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 19:20:10,423 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 19:20:10,424 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem19_label09.c [2020-10-27 19:20:10,517 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/26a50cb0d/cba0a7b479ea4fde91b54e0ab4172837/FLAG8a0060e7d [2020-10-27 19:20:11,768 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 19:20:11,769 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem19_label09.c [2020-10-27 19:20:11,862 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/26a50cb0d/cba0a7b479ea4fde91b54e0ab4172837/FLAG8a0060e7d [2020-10-27 19:20:12,039 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/26a50cb0d/cba0a7b479ea4fde91b54e0ab4172837 [2020-10-27 19:20:12,042 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 19:20:12,050 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 19:20:12,051 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 19:20:12,051 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 19:20:12,056 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 19:20:12,057 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 07:20:12" (1/1) ... [2020-10-27 19:20:12,061 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3a48f637 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:20:12, skipping insertion in model container [2020-10-27 19:20:12,061 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 07:20:12" (1/1) ... [2020-10-27 19:20:12,070 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 19:20:12,311 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 19:20:14,657 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 19:20:14,675 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 19:20:15,714 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 19:20:15,773 INFO L208 MainTranslator]: Completed translation [2020-10-27 19:20:15,774 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:20:15 WrapperNode [2020-10-27 19:20:15,774 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 19:20:15,775 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 19:20:15,776 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 19:20:15,776 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 19:20:15,793 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:20:15" (1/1) ... [2020-10-27 19:20:15,793 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:20:15" (1/1) ... [2020-10-27 19:20:15,903 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:20:15" (1/1) ... [2020-10-27 19:20:15,903 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:20:15" (1/1) ... [2020-10-27 19:20:16,168 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:20:15" (1/1) ... [2020-10-27 19:20:16,218 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:20:15" (1/1) ... [2020-10-27 19:20:16,284 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:20:15" (1/1) ... [2020-10-27 19:20:16,433 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 19:20:16,434 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 19:20:16,434 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 19:20:16,434 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 19:20:16,435 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:20:15" (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 19:20:16,519 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 19:20:16,520 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 19:20:16,520 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 19:20:16,521 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-27 19:20:16,521 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-27 19:20:16,521 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2020-10-27 19:20:16,521 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2020-10-27 19:20:16,522 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output5 [2020-10-27 19:20:16,522 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output6 [2020-10-27 19:20:16,522 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 19:20:16,523 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-27 19:20:16,523 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-27 19:20:16,523 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2020-10-27 19:20:16,524 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2020-10-27 19:20:16,524 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output5 [2020-10-27 19:20:16,525 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output6 [2020-10-27 19:20:16,525 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 19:20:16,525 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 19:20:16,526 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 19:20:16,526 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 19:20:16,526 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 19:20:16,526 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-27 19:20:16,526 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 19:20:16,526 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 19:20:16,527 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 19:20:16,527 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 19:20:16,527 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 19:20:16,527 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 19:20:16,527 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 19:20:30,390 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 19:20:30,391 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-27 19:20:30,397 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 07:20:30 BoogieIcfgContainer [2020-10-27 19:20:30,397 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 19:20:30,400 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 19:20:30,400 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 19:20:30,404 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 19:20:30,404 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 07:20:12" (1/3) ... [2020-10-27 19:20:30,405 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73011460 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 07:20:30, skipping insertion in model container [2020-10-27 19:20:30,405 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:20:15" (2/3) ... [2020-10-27 19:20:30,405 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73011460 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 07:20:30, skipping insertion in model container [2020-10-27 19:20:30,406 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 07:20:30" (3/3) ... [2020-10-27 19:20:30,408 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem19_label09.c [2020-10-27 19:20:30,420 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 19:20:30,428 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 19:20:30,442 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 19:20:30,481 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 19:20:30,481 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 19:20:30,481 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 19:20:30,481 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 19:20:30,481 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 19:20:30,481 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 19:20:30,482 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 19:20:30,482 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 19:20:30,532 INFO L276 IsEmpty]: Start isEmpty. Operand 1781 states. [2020-10-27 19:20:30,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-27 19:20:30,542 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:20:30,543 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:20:30,543 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:20:30,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:20:30,551 INFO L82 PathProgramCache]: Analyzing trace with hash 759272085, now seen corresponding path program 1 times [2020-10-27 19:20:30,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:20:30,561 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1552484240] [2020-10-27 19:20:30,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:20:30,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:20:30,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:20:31,599 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:20:31,599 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-27 19:20:31,599 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:20:31,599 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 771 [2020-10-27 19:20:31,601 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:20:31,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 19:20:31,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 19:20:31,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-27 19:20:31,603 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 19:20:31,816 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:20:31,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:20:31,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:20:31,872 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:20:31,873 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:20:31,873 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:20:31,873 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 36 [2020-10-27 19:20:31,873 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:20:31,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 19:20:31,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:20:31,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 19:20:31,874 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:20:31,905 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 19:20:31,906 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1552484240] [2020-10-27 19:20:31,908 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 19:20:31,909 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-27 19:20:31,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263006829] [2020-10-27 19:20:31,917 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 19:20:31,918 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:20:31,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 19:20:31,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 19:20:31,943 INFO L87 Difference]: Start difference. First operand 1781 states. Second operand 4 states. [2020-10-27 19:20:57,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:20:57,010 INFO L93 Difference]: Finished difference Result 5091 states and 9567 transitions. [2020-10-27 19:20:57,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 19:20:57,012 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 56 [2020-10-27 19:20:57,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:20:57,064 INFO L225 Difference]: With dead ends: 5091 [2020-10-27 19:20:57,064 INFO L226 Difference]: Without dead ends: 3246 [2020-10-27 19:20:57,084 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 19:20:57,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3246 states. [2020-10-27 19:20:57,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3246 to 3179. [2020-10-27 19:20:57,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3179 states. [2020-10-27 19:20:57,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3179 states to 3179 states and 5850 transitions. [2020-10-27 19:20:57,316 INFO L78 Accepts]: Start accepts. Automaton has 3179 states and 5850 transitions. Word has length 56 [2020-10-27 19:20:57,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:20:57,317 INFO L481 AbstractCegarLoop]: Abstraction has 3179 states and 5850 transitions. [2020-10-27 19:20:57,317 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 19:20:57,318 INFO L276 IsEmpty]: Start isEmpty. Operand 3179 states and 5850 transitions. [2020-10-27 19:20:57,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-10-27 19:20:57,324 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:20:57,324 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:20:57,325 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 19:20:57,325 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:20:57,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:20:57,326 INFO L82 PathProgramCache]: Analyzing trace with hash -438951134, now seen corresponding path program 1 times [2020-10-27 19:20:57,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:20:57,326 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1788402745] [2020-10-27 19:20:57,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:20:57,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:20:57,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:20:57,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:20:57,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:20:58,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:20:58,912 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:20:58,913 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 139 [2020-10-27 19:20:58,914 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 19:20:58,915 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1539 [2020-10-27 19:20:58,919 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:20:58,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 19:20:58,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 80 [2020-10-27 19:20:58,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-27 19:20:58,921 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 19:20:59,055 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:20:59,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:20:59,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:20:59,070 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:20:59,070 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:20:59,070 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:20:59,078 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 19:20:59,078 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:20:59,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:20:59,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:20:59,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:20:59,079 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:20:59,101 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 19:20:59,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:20:59,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:20:59,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:20:59,319 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:20:59,319 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-27 19:20:59,320 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 19:20:59,320 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 103 [2020-10-27 19:20:59,320 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:20:59,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 19:20:59,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 64 [2020-10-27 19:20:59,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 19:20:59,321 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:20:59,411 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 47 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:20:59,411 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1788402745] [2020-10-27 19:20:59,411 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:20:59,411 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 19:20:59,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641187820] [2020-10-27 19:20:59,414 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 19:20:59,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:20:59,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 19:20:59,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-27 19:20:59,417 INFO L87 Difference]: Start difference. First operand 3179 states and 5850 transitions. Second operand 6 states. [2020-10-27 19:22:03,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:22:03,979 INFO L93 Difference]: Finished difference Result 13517 states and 25475 transitions. [2020-10-27 19:22:03,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 19:22:03,983 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 127 [2020-10-27 19:22:03,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:22:04,059 INFO L225 Difference]: With dead ends: 13517 [2020-10-27 19:22:04,059 INFO L226 Difference]: Without dead ends: 10344 [2020-10-27 19:22:04,073 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-10-27 19:22:04,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10344 states. [2020-10-27 19:22:04,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10344 to 10277. [2020-10-27 19:22:04,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10277 states. [2020-10-27 19:22:04,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10277 states to 10277 states and 16436 transitions. [2020-10-27 19:22:04,448 INFO L78 Accepts]: Start accepts. Automaton has 10277 states and 16436 transitions. Word has length 127 [2020-10-27 19:22:04,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:22:04,451 INFO L481 AbstractCegarLoop]: Abstraction has 10277 states and 16436 transitions. [2020-10-27 19:22:04,451 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 19:22:04,451 INFO L276 IsEmpty]: Start isEmpty. Operand 10277 states and 16436 transitions. [2020-10-27 19:22:04,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2020-10-27 19:22:04,466 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:22:04,466 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:22:04,467 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 19:22:04,467 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:22:04,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:22:04,468 INFO L82 PathProgramCache]: Analyzing trace with hash -640217818, now seen corresponding path program 1 times [2020-10-27 19:22:04,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:22:04,473 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1764705558] [2020-10-27 19:22:04,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:22:04,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:22:04,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:22:04,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:22:05,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:22:06,318 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:22:06,318 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 155 [2020-10-27 19:22:06,319 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 19:22:06,319 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1789 [2020-10-27 19:22:06,319 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:22:06,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 19:22:06,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 97 [2020-10-27 19:22:06,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-27 19:22:06,319 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:22:06,569 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:22:06,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:22:06,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:22:06,586 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:22:06,586 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:22:06,586 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:22:06,586 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-27 19:22:06,586 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:22:06,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:22:06,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:22:06,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:22:06,587 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:22:06,624 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 19:22:06,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:22:06,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:22:06,757 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:22:06,757 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-27 19:22:06,757 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:22:06,757 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 105 [2020-10-27 19:22:06,758 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:22:06,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 19:22:06,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:22:06,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-27 19:22:06,758 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:22:06,839 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 47 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:22:06,839 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1764705558] [2020-10-27 19:22:06,840 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:22:06,840 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 19:22:06,840 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512647855] [2020-10-27 19:22:06,842 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 19:22:06,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:22:06,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 19:22:06,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 19:22:06,846 INFO L87 Difference]: Start difference. First operand 10277 states and 16436 transitions. Second operand 5 states. [2020-10-27 19:22:59,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:22:59,860 INFO L93 Difference]: Finished difference Result 29052 states and 46663 transitions. [2020-10-27 19:22:59,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 19:22:59,865 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 143 [2020-10-27 19:22:59,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:22:59,961 INFO L225 Difference]: With dead ends: 29052 [2020-10-27 19:22:59,961 INFO L226 Difference]: Without dead ends: 18781 [2020-10-27 19:22:59,997 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 19:23:00,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18781 states. [2020-10-27 19:23:00,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18781 to 18748. [2020-10-27 19:23:00,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18748 states. [2020-10-27 19:23:00,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18748 states to 18748 states and 26898 transitions. [2020-10-27 19:23:00,522 INFO L78 Accepts]: Start accepts. Automaton has 18748 states and 26898 transitions. Word has length 143 [2020-10-27 19:23:00,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:23:00,527 INFO L481 AbstractCegarLoop]: Abstraction has 18748 states and 26898 transitions. [2020-10-27 19:23:00,527 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 19:23:00,528 INFO L276 IsEmpty]: Start isEmpty. Operand 18748 states and 26898 transitions. [2020-10-27 19:23:00,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2020-10-27 19:23:00,534 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:23:00,535 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:23:00,535 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 19:23:00,535 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:23:00,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:23:00,536 INFO L82 PathProgramCache]: Analyzing trace with hash -671242591, now seen corresponding path program 1 times [2020-10-27 19:23:00,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:23:00,539 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [16182985] [2020-10-27 19:23:00,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:23:00,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:23:00,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:23:01,133 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:23:01,133 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 162 [2020-10-27 19:23:01,133 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:23:01,133 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 537 [2020-10-27 19:23:01,134 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:23:01,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 19:23:01,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 19:23:01,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 100 [2020-10-27 19:23:01,134 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:23:01,298 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-27 19:23:01,301 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:23:01,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:23:01,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:23:01,336 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:23:01,336 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:23:01,337 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:23:01,337 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-27 19:23:01,337 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:23:01,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 19:23:01,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:23:01,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 19:23:01,337 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:23:01,382 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 19:23:01,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:23:01,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:23:01,634 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:23:01,634 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-27 19:23:01,634 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:23:01,634 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 222 [2020-10-27 19:23:01,635 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:23:01,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 19:23:01,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 19:23:01,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 95 [2020-10-27 19:23:01,636 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:23:01,880 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:23:01,881 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [16182985] [2020-10-27 19:23:01,881 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 19:23:01,881 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 19:23:01,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667557351] [2020-10-27 19:23:01,887 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 19:23:01,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:23:01,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 19:23:01,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 19:23:01,888 INFO L87 Difference]: Start difference. First operand 18748 states and 26898 transitions. Second operand 7 states. [2020-10-27 19:23:02,047 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 68