/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_label43.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 19:30:38,636 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 19:30:38,640 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 19:30:38,685 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 19:30:38,685 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 19:30:38,687 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 19:30:38,689 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 19:30:38,692 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 19:30:38,695 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 19:30:38,704 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 19:30:38,710 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 19:30:38,715 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 19:30:38,715 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 19:30:38,717 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 19:30:38,718 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 19:30:38,720 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 19:30:38,721 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 19:30:38,723 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 19:30:38,725 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 19:30:38,727 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 19:30:38,730 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 19:30:38,732 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 19:30:38,734 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 19:30:38,736 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 19:30:38,739 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 19:30:38,740 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 19:30:38,740 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 19:30:38,741 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 19:30:38,742 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 19:30:38,744 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 19:30:38,744 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 19:30:38,745 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 19:30:38,746 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 19:30:38,747 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 19:30:38,749 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 19:30:38,750 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 19:30:38,750 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 19:30:38,751 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 19:30:38,751 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 19:30:38,752 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 19:30:38,753 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 19:30:38,762 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 19:30:38,812 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 19:30:38,812 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 19:30:38,814 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 19:30:38,815 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 19:30:38,815 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 19:30:38,815 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 19:30:38,815 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 19:30:38,816 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 19:30:38,816 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 19:30:38,816 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 19:30:38,816 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 19:30:38,816 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 19:30:38,817 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 19:30:38,817 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 19:30:38,817 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 19:30:38,817 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 19:30:38,817 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 19:30:38,818 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 19:30:38,818 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 19:30:38,818 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 19:30:38,818 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 19:30:38,818 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 19:30:38,819 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 19:30:38,819 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 19:30:38,819 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 19:30:38,819 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 19:30:38,820 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 19:30:38,820 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 19:30:38,820 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 19:30:38,820 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 19:30:39,262 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 19:30:39,307 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 19:30:39,311 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 19:30:39,313 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 19:30:39,314 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 19:30:39,322 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem19_label43.c [2020-10-27 19:30:39,435 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b22f61f43/e632afb2e6934b258378d9dd980e2e52/FLAG49a07a6dd [2020-10-27 19:30:40,848 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 19:30:40,849 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem19_label43.c [2020-10-27 19:30:40,928 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b22f61f43/e632afb2e6934b258378d9dd980e2e52/FLAG49a07a6dd [2020-10-27 19:30:41,085 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b22f61f43/e632afb2e6934b258378d9dd980e2e52 [2020-10-27 19:30:41,089 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 19:30:41,097 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 19:30:41,099 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 19:30:41,099 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 19:30:41,105 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 19:30:41,106 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 07:30:41" (1/1) ... [2020-10-27 19:30:41,110 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@188d3348 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:30:41, skipping insertion in model container [2020-10-27 19:30:41,111 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 07:30:41" (1/1) ... [2020-10-27 19:30:41,121 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 19:30:41,420 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 19:30:44,173 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 19:30:44,194 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 19:30:45,451 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 19:30:45,521 INFO L208 MainTranslator]: Completed translation [2020-10-27 19:30:45,522 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:30:45 WrapperNode [2020-10-27 19:30:45,522 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 19:30:45,524 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 19:30:45,524 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 19:30:45,524 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 19:30:45,543 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:30:45" (1/1) ... [2020-10-27 19:30:45,543 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:30:45" (1/1) ... [2020-10-27 19:30:45,716 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:30:45" (1/1) ... [2020-10-27 19:30:45,716 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:30:45" (1/1) ... [2020-10-27 19:30:46,108 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:30:45" (1/1) ... [2020-10-27 19:30:46,163 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:30:45" (1/1) ... [2020-10-27 19:30:46,282 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:30:45" (1/1) ... [2020-10-27 19:30:46,408 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 19:30:46,409 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 19:30:46,409 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 19:30:46,409 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 19:30:46,410 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:30:45" (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 19:30:46,522 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 19:30:46,522 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 19:30:46,523 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 19:30:46,523 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-27 19:30:46,523 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-27 19:30:46,523 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2020-10-27 19:30:46,524 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2020-10-27 19:30:46,524 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output5 [2020-10-27 19:30:46,524 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output6 [2020-10-27 19:30:46,524 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 19:30:46,526 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-27 19:30:46,526 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-27 19:30:46,526 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2020-10-27 19:30:46,527 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2020-10-27 19:30:46,527 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output5 [2020-10-27 19:30:46,528 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output6 [2020-10-27 19:30:46,528 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 19:30:46,528 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 19:30:46,528 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 19:30:46,529 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 19:30:46,529 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 19:30:46,529 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-27 19:30:46,529 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 19:30:46,530 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 19:30:46,530 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 19:30:46,530 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 19:30:46,530 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 19:30:46,530 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 19:30:46,530 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 19:31:03,479 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 19:31:03,481 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-27 19:31:03,490 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 07:31:03 BoogieIcfgContainer [2020-10-27 19:31:03,490 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 19:31:03,500 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 19:31:03,500 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 19:31:03,507 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 19:31:03,508 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 07:30:41" (1/3) ... [2020-10-27 19:31:03,509 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b906168 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 07:31:03, skipping insertion in model container [2020-10-27 19:31:03,509 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:30:45" (2/3) ... [2020-10-27 19:31:03,511 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b906168 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 07:31:03, skipping insertion in model container [2020-10-27 19:31:03,512 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 07:31:03" (3/3) ... [2020-10-27 19:31:03,514 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem19_label43.c [2020-10-27 19:31:03,530 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 19:31:03,540 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 19:31:03,562 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 19:31:03,633 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 19:31:03,634 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 19:31:03,634 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 19:31:03,634 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 19:31:03,634 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 19:31:03,634 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 19:31:03,635 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 19:31:03,635 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 19:31:03,708 INFO L276 IsEmpty]: Start isEmpty. Operand 1781 states. [2020-10-27 19:31:03,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-27 19:31:03,720 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:31:03,721 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] [2020-10-27 19:31:03,721 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:31:03,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:31:03,732 INFO L82 PathProgramCache]: Analyzing trace with hash 1687638702, now seen corresponding path program 1 times [2020-10-27 19:31:03,743 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:31:03,744 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2011586365] [2020-10-27 19:31:03,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:31:04,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:31:04,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:31:04,859 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:31:04,859 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-27 19:31:04,860 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:31:04,860 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 776 [2020-10-27 19:31:04,862 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:31:04,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 19:31:04,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 19:31:04,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-27 19:31:04,863 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 19:31:05,064 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:31:05,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:31:05,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:31:05,153 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:31:05,153 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:31:05,153 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:31:05,154 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 62 [2020-10-27 19:31:05,154 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:31:05,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 19:31:05,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:31:05,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 19:31:05,155 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 19:31:05,196 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 19:31:05,197 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2011586365] [2020-10-27 19:31:05,203 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 19:31:05,203 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-27 19:31:05,205 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793661421] [2020-10-27 19:31:05,214 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 19:31:05,215 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:31:05,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 19:31:05,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 19:31:05,249 INFO L87 Difference]: Start difference. First operand 1781 states. Second operand 4 states. [2020-10-27 19:31:05,440 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-27 19:31:36,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:31:36,948 INFO L93 Difference]: Finished difference Result 5036 states and 9459 transitions. [2020-10-27 19:31:36,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 19:31:36,952 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 29 [2020-10-27 19:31:36,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:31:36,997 INFO L225 Difference]: With dead ends: 5036 [2020-10-27 19:31:36,998 INFO L226 Difference]: Without dead ends: 3191 [2020-10-27 19:31:37,013 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 19:31:37,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3191 states. [2020-10-27 19:31:37,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3191 to 3185. [2020-10-27 19:31:37,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3185 states. [2020-10-27 19:31:37,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3185 states to 3185 states and 4966 transitions. [2020-10-27 19:31:37,377 INFO L78 Accepts]: Start accepts. Automaton has 3185 states and 4966 transitions. Word has length 29 [2020-10-27 19:31:37,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:31:37,378 INFO L481 AbstractCegarLoop]: Abstraction has 3185 states and 4966 transitions. [2020-10-27 19:31:37,379 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 19:31:37,379 INFO L276 IsEmpty]: Start isEmpty. Operand 3185 states and 4966 transitions. [2020-10-27 19:31:37,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-10-27 19:31:37,389 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:31:37,390 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:31:37,391 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 19:31:37,392 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:31:37,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:31:37,395 INFO L82 PathProgramCache]: Analyzing trace with hash -974389909, now seen corresponding path program 1 times [2020-10-27 19:31:37,396 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:31:37,397 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2052389925] [2020-10-27 19:31:37,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:31:37,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:31:37,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:31:37,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:31:37,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:31:38,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:31:40,020 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:31:40,021 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 114 [2020-10-27 19:31:40,022 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 19:31:40,026 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2534 [2020-10-27 19:31:40,028 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:31:40,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 19:31:40,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 82 [2020-10-27 19:31:40,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-27 19:31:40,030 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 19:31:40,196 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:31:40,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:31:40,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:31:40,208 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:31:40,209 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:31:40,209 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:31:40,209 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 19:31:40,209 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:31:40,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:31:40,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:31:40,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:31:40,210 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:31:40,236 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 19:31:40,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:31:40,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:31:40,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:31:40,451 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:31:40,452 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-27 19:31:40,453 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 19:31:40,453 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 181 [2020-10-27 19:31:40,453 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:31:40,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 19:31:40,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 66 [2020-10-27 19:31:40,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 19:31:40,454 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:31:40,532 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 20 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:31:40,532 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2052389925] [2020-10-27 19:31:40,532 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:31:40,533 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 19:31:40,533 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535801431] [2020-10-27 19:31:40,537 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 19:31:40,537 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:31:40,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 19:31:40,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-27 19:31:40,539 INFO L87 Difference]: Start difference. First operand 3185 states and 4966 transitions. Second operand 6 states. [2020-10-27 19:32:46,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:32:46,123 INFO L93 Difference]: Finished difference Result 14933 states and 23755 transitions. [2020-10-27 19:32:46,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 19:32:46,130 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 102 [2020-10-27 19:32:46,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:32:46,193 INFO L225 Difference]: With dead ends: 14933 [2020-10-27 19:32:46,193 INFO L226 Difference]: Without dead ends: 11754 [2020-10-27 19:32:46,207 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 9 SyntacticMatches, 1 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 19:32:46,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11754 states. [2020-10-27 19:32:46,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11754 to 11699. [2020-10-27 19:32:46,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11699 states. [2020-10-27 19:32:46,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11699 states to 11699 states and 15018 transitions. [2020-10-27 19:32:46,570 INFO L78 Accepts]: Start accepts. Automaton has 11699 states and 15018 transitions. Word has length 102 [2020-10-27 19:32:46,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:32:46,570 INFO L481 AbstractCegarLoop]: Abstraction has 11699 states and 15018 transitions. [2020-10-27 19:32:46,571 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 19:32:46,571 INFO L276 IsEmpty]: Start isEmpty. Operand 11699 states and 15018 transitions. [2020-10-27 19:32:46,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-10-27 19:32:46,573 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:32:46,573 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:32:46,574 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 19:32:46,574 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:32:46,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:32:46,575 INFO L82 PathProgramCache]: Analyzing trace with hash 169476344, now seen corresponding path program 1 times [2020-10-27 19:32:46,575 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:32:46,575 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [876781351] [2020-10-27 19:32:46,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:32:46,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:32:46,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:32:46,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:32:47,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:32:48,315 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:32:48,315 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 142 [2020-10-27 19:32:48,315 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 19:32:48,316 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1697 [2020-10-27 19:32:48,316 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:32:48,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 19:32:48,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 111 [2020-10-27 19:32:48,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-27 19:32:48,317 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:32:48,514 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:32:48,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:32:48,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:32:48,528 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:32:48,529 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:32:48,529 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:32:48,530 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 19:32:48,530 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:32:48,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:32:48,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:32:48,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:32:48,531 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:32:48,572 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 19:32:48,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:32:48,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:32:48,781 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:32:48,782 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-10-27 19:32:48,782 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:32:48,782 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 165 [2020-10-27 19:32:48,782 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:32:48,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 19:32:48,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:32:48,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 96 [2020-10-27 19:32:48,783 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 19:32:48,916 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 20 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:32:48,917 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [876781351] [2020-10-27 19:32:48,917 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:32:48,917 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 19:32:48,918 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931679709] [2020-10-27 19:32:48,920 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 19:32:48,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:32:48,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 19:32:48,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-27 19:32:48,923 INFO L87 Difference]: Start difference. First operand 11699 states and 15018 transitions. Second operand 6 states. [2020-10-27 19:32:49,065 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-27 19:33:56,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:33:56,597 INFO L93 Difference]: Finished difference Result 34753 states and 46839 transitions. [2020-10-27 19:33:56,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 19:33:56,601 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 130 [2020-10-27 19:33:56,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:33:56,739 INFO L225 Difference]: With dead ends: 34753 [2020-10-27 19:33:56,739 INFO L226 Difference]: Without dead ends: 23060 [2020-10-27 19:33:56,781 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-27 19:33:56,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23060 states. [2020-10-27 19:33:57,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23060 to 22958. [2020-10-27 19:33:57,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22958 states. [2020-10-27 19:33:57,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22958 states to 22958 states and 30900 transitions. [2020-10-27 19:33:57,567 INFO L78 Accepts]: Start accepts. Automaton has 22958 states and 30900 transitions. Word has length 130 [2020-10-27 19:33:57,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:33:57,568 INFO L481 AbstractCegarLoop]: Abstraction has 22958 states and 30900 transitions. [2020-10-27 19:33:57,569 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 19:33:57,569 INFO L276 IsEmpty]: Start isEmpty. Operand 22958 states and 30900 transitions. [2020-10-27 19:33:57,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2020-10-27 19:33:57,590 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:33:57,590 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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] [2020-10-27 19:33:57,591 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 19:33:57,591 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:33:57,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:33:57,597 INFO L82 PathProgramCache]: Analyzing trace with hash -1840429140, now seen corresponding path program 1 times [2020-10-27 19:33:57,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:33:57,598 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [252143892] [2020-10-27 19:33:57,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:33:57,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:33:57,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:33:57,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:33:58,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:33:59,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:34:01,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:34:02,661 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:34:02,662 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 219 [2020-10-27 19:34:02,662 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 19:34:02,663 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-27 19:34:02,663 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:34:02,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 19:34:02,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 188 [2020-10-27 19:34:02,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-27 19:34:02,664 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:34:02,882 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-27 19:34:02,884 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:34:02,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:34:02,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:34:02,897 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:34:02,897 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:34:02,897 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:34:02,898 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 19:34:02,898 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:34:02,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:34:02,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:34:02,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:34:02,901 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 19:34:02,967 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 19:34:02,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:34:02,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:34:03,019 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:34:03,019 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-10-27 19:34:03,020 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:34:03,020 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 42 [2020-10-27 19:34:03,020 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:34:03,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:34:03,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:34:03,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:34:03,026 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-10-27 19:34:03,141 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2020-10-27 19:34:03,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:34:03,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:34:03,275 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:34:03,276 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-27 19:34:03,276 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:34:03,276 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 100 [2020-10-27 19:34:03,277 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:34:03,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 19:34:03,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:34:03,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-27 19:34:03,278 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 19:34:03,394 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 43 proven. 2 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2020-10-27 19:34:03,395 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [252143892] [2020-10-27 19:34:03,396 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:34:03,396 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 19:34:03,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704720362] [2020-10-27 19:34:03,399 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 19:34:03,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:34:03,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 19:34:03,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 19:34:03,402 INFO L87 Difference]: Start difference. First operand 22958 states and 30900 transitions. Second operand 5 states. [2020-10-27 19:34:05,438 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 66