/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=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.6 --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_label13.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 14:04:53,997 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 14:04:54,001 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 14:04:54,047 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 14:04:54,048 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 14:04:54,050 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 14:04:54,052 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 14:04:54,055 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 14:04:54,058 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 14:04:54,059 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 14:04:54,060 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 14:04:54,062 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 14:04:54,063 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 14:04:54,064 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 14:04:54,066 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 14:04:54,068 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 14:04:54,069 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 14:04:54,070 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 14:04:54,073 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 14:04:54,075 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 14:04:54,078 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 14:04:54,080 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 14:04:54,082 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 14:04:54,083 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 14:04:54,087 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 14:04:54,098 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 14:04:54,099 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 14:04:54,100 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 14:04:54,101 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 14:04:54,102 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 14:04:54,103 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 14:04:54,104 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 14:04:54,105 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 14:04:54,106 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 14:04:54,108 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 14:04:54,108 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 14:04:54,109 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 14:04:54,110 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 14:04:54,110 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 14:04:54,112 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 14:04:54,113 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 14:04:54,114 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 [2020-10-28 14:04:54,143 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 14:04:54,144 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 14:04:54,146 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 14:04:54,146 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 14:04:54,147 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 14:04:54,147 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 14:04:54,147 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 14:04:54,147 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 14:04:54,148 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 14:04:54,148 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 14:04:54,148 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 14:04:54,148 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 14:04:54,148 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 14:04:54,149 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 14:04:54,149 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 14:04:54,149 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 14:04:54,149 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 14:04:54,149 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 14:04:54,150 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 14:04:54,150 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 14:04:54,150 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 14:04:54,150 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 14:04:54,151 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 14:04:54,151 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 14:04:54,151 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 14:04:54,151 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 14:04:54,151 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 14:04:54,152 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 14:04:54,152 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 14:04:54,152 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 14:04:54,621 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 14:04:54,665 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 14:04:54,667 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 14:04:54,669 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 14:04:54,670 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 14:04:54,671 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem19_label13.c [2020-10-28 14:04:54,761 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a86baf370/8627cbc1124d4a6287aac84d2d065d77/FLAGcb2daa8e8 [2020-10-28 14:04:55,956 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 14:04:55,956 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem19_label13.c [2020-10-28 14:04:56,028 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a86baf370/8627cbc1124d4a6287aac84d2d065d77/FLAGcb2daa8e8 [2020-10-28 14:04:56,217 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a86baf370/8627cbc1124d4a6287aac84d2d065d77 [2020-10-28 14:04:56,222 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 14:04:56,231 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 14:04:56,292 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 14:04:56,292 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 14:04:56,298 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 14:04:56,299 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 02:04:56" (1/1) ... [2020-10-28 14:04:56,310 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7f78a2b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:04:56, skipping insertion in model container [2020-10-28 14:04:56,310 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 02:04:56" (1/1) ... [2020-10-28 14:04:56,320 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 14:04:56,523 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 14:04:58,829 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 14:04:58,852 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 14:05:00,021 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 14:05:00,084 INFO L208 MainTranslator]: Completed translation [2020-10-28 14:05:00,085 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:05:00 WrapperNode [2020-10-28 14:05:00,085 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 14:05:00,086 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 14:05:00,087 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 14:05:00,088 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 14:05:00,103 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:05:00" (1/1) ... [2020-10-28 14:05:00,106 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:05:00" (1/1) ... [2020-10-28 14:05:00,222 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:05:00" (1/1) ... [2020-10-28 14:05:00,223 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:05:00" (1/1) ... [2020-10-28 14:05:00,516 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:05:00" (1/1) ... [2020-10-28 14:05:00,574 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:05:00" (1/1) ... [2020-10-28 14:05:00,637 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:05:00" (1/1) ... [2020-10-28 14:05:00,733 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 14:05:00,736 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 14:05:00,736 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 14:05:00,736 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 14:05:00,738 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:05:00" (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 [2020-10-28 14:05:00,827 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 14:05:00,827 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 14:05:00,828 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 14:05:00,828 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-28 14:05:00,828 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-28 14:05:00,828 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2020-10-28 14:05:00,828 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2020-10-28 14:05:00,828 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output5 [2020-10-28 14:05:00,829 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output6 [2020-10-28 14:05:00,829 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 14:05:00,829 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-28 14:05:00,829 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-28 14:05:00,829 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2020-10-28 14:05:00,829 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2020-10-28 14:05:00,830 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output5 [2020-10-28 14:05:00,830 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output6 [2020-10-28 14:05:00,830 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 14:05:00,830 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 14:05:00,830 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 14:05:00,831 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 14:05:00,831 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-28 14:05:00,831 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-28 14:05:00,831 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 14:05:00,831 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 14:05:00,832 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 14:05:00,832 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 14:05:00,832 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 14:05:00,832 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 14:05:00,832 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 14:05:17,576 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 14:05:17,577 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-28 14:05:17,583 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 02:05:17 BoogieIcfgContainer [2020-10-28 14:05:17,583 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 14:05:17,590 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 14:05:17,590 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 14:05:17,595 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 14:05:17,595 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 02:04:56" (1/3) ... [2020-10-28 14:05:17,596 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27ec6e02 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 02:05:17, skipping insertion in model container [2020-10-28 14:05:17,597 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:05:00" (2/3) ... [2020-10-28 14:05:17,597 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27ec6e02 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 02:05:17, skipping insertion in model container [2020-10-28 14:05:17,597 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 02:05:17" (3/3) ... [2020-10-28 14:05:17,599 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem19_label13.c [2020-10-28 14:05:17,620 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 14:05:17,627 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 14:05:17,644 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 14:05:17,702 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 14:05:17,702 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 14:05:17,703 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 14:05:17,703 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 14:05:17,703 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 14:05:17,703 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 14:05:17,703 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 14:05:17,704 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 14:05:17,771 INFO L276 IsEmpty]: Start isEmpty. Operand 1781 states. [2020-10-28 14:05:17,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-28 14:05:17,788 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:05:17,789 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] [2020-10-28 14:05:17,789 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:05:17,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:05:17,799 INFO L82 PathProgramCache]: Analyzing trace with hash 1774973053, now seen corresponding path program 1 times [2020-10-28 14:05:17,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:05:17,810 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [407321779] [2020-10-28 14:05:17,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:05:17,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:05:18,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:05:18,755 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:05:18,756 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-28 14:05:18,756 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:05:18,757 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 754 [2020-10-28 14:05:18,760 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:05:18,760 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:05:18,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 14:05:18,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 14:05:18,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-28 14:05:18,762 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-28 14:05:18,962 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:05:18,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:05:18,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:05:19,025 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:05:19,026 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:05:19,026 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:05:19,026 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 41 [2020-10-28 14:05:19,027 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:05:19,027 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:05:19,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:05:19,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:05:19,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 14:05:19,028 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:05:19,060 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:05:19,061 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [407321779] [2020-10-28 14:05:19,063 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:05:19,064 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-28 14:05:19,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605994060] [2020-10-28 14:05:19,073 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 14:05:19,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:05:19,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 14:05:19,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:05:19,099 INFO L87 Difference]: Start difference. First operand 1781 states. Second operand 4 states. [2020-10-28 14:05:50,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:05:50,404 INFO L93 Difference]: Finished difference Result 5100 states and 9572 transitions. [2020-10-28 14:05:50,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 14:05:50,409 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 42 [2020-10-28 14:05:50,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:05:50,467 INFO L225 Difference]: With dead ends: 5100 [2020-10-28 14:05:50,467 INFO L226 Difference]: Without dead ends: 3255 [2020-10-28 14:05:50,488 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 14:05:50,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3255 states. [2020-10-28 14:05:50,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3255 to 3209. [2020-10-28 14:05:50,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3209 states. [2020-10-28 14:05:50,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3209 states to 3209 states and 5178 transitions. [2020-10-28 14:05:50,763 INFO L78 Accepts]: Start accepts. Automaton has 3209 states and 5178 transitions. Word has length 42 [2020-10-28 14:05:50,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:05:50,765 INFO L481 AbstractCegarLoop]: Abstraction has 3209 states and 5178 transitions. [2020-10-28 14:05:50,765 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 14:05:50,765 INFO L276 IsEmpty]: Start isEmpty. Operand 3209 states and 5178 transitions. [2020-10-28 14:05:50,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-10-28 14:05:50,777 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:05:50,779 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:05:50,779 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 14:05:50,780 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:05:50,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:05:50,782 INFO L82 PathProgramCache]: Analyzing trace with hash 2071176820, now seen corresponding path program 1 times [2020-10-28 14:05:50,784 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:05:50,785 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1467303824] [2020-10-28 14:05:50,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:05:50,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:05:50,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:05:51,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:05:52,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:05:52,892 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:05:52,894 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 129 [2020-10-28 14:05:52,894 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 14:05:52,898 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2037 [2020-10-28 14:05:52,899 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:05:52,900 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:05:52,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 14:05:52,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 14:05:52,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 81 [2020-10-28 14:05:52,901 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-28 14:05:53,041 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:05:53,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:05:53,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:05:53,068 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:05:53,075 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:05:53,077 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:05:53,077 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-28 14:05:53,077 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:05:53,077 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:05:53,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:05:53,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:05:53,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 14:05:53,078 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:05:53,111 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 14:05:53,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:05:53,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:05:53,346 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:05:53,347 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-28 14:05:53,347 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:05:53,347 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 201 [2020-10-28 14:05:53,347 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:05:53,348 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:05:53,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 14:05:53,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 14:05:53,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-28 14:05:53,348 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:05:53,527 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:05:53,528 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1467303824] [2020-10-28 14:05:53,528 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:05:53,528 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-28 14:05:53,528 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545263355] [2020-10-28 14:05:53,531 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 14:05:53,532 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:05:53,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 14:05:53,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-28 14:05:53,535 INFO L87 Difference]: Start difference. First operand 3209 states and 5178 transitions. Second operand 8 states. [2020-10-28 14:05:53,699 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-28 14:06:59,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:06:59,297 INFO L93 Difference]: Finished difference Result 12277 states and 20208 transitions. [2020-10-28 14:06:59,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 14:06:59,299 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 117 [2020-10-28 14:06:59,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:06:59,359 INFO L225 Difference]: With dead ends: 12277 [2020-10-28 14:06:59,359 INFO L226 Difference]: Without dead ends: 9074 [2020-10-28 14:06:59,372 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2020-10-28 14:06:59,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9074 states. [2020-10-28 14:06:59,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9074 to 9029. [2020-10-28 14:06:59,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9029 states. [2020-10-28 14:06:59,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9029 states to 9029 states and 13498 transitions. [2020-10-28 14:06:59,693 INFO L78 Accepts]: Start accepts. Automaton has 9029 states and 13498 transitions. Word has length 117 [2020-10-28 14:06:59,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:06:59,694 INFO L481 AbstractCegarLoop]: Abstraction has 9029 states and 13498 transitions. [2020-10-28 14:06:59,694 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 14:06:59,694 INFO L276 IsEmpty]: Start isEmpty. Operand 9029 states and 13498 transitions. [2020-10-28 14:06:59,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2020-10-28 14:06:59,698 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:06:59,698 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:06:59,699 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 14:06:59,699 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:06:59,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:06:59,700 INFO L82 PathProgramCache]: Analyzing trace with hash -259991502, now seen corresponding path program 1 times [2020-10-28 14:06:59,700 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:06:59,700 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [15412818] [2020-10-28 14:06:59,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:06:59,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:06:59,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:07:00,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:07:00,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:07:01,875 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:07:01,876 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 155 [2020-10-28 14:07:01,876 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 14:07:01,876 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2122 [2020-10-28 14:07:01,877 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:07:01,877 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:07:01,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 14:07:01,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 14:07:01,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 107 [2020-10-28 14:07:01,878 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:07:02,066 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-28 14:07:02,068 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:07:02,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:07:02,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:07:02,098 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:07:02,098 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:07:02,098 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:07:02,099 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-28 14:07:02,099 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:07:02,099 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:07:02,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:07:02,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:07:02,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 14:07:02,100 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:07:02,140 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 14:07:02,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:07:02,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:07:02,428 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:07:02,429 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-10-28 14:07:02,429 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:07:02,429 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 252 [2020-10-28 14:07:02,429 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:07:02,430 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:07:02,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 14:07:02,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 14:07:02,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 102 [2020-10-28 14:07:02,430 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:07:02,573 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:07:02,575 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [15412818] [2020-10-28 14:07:02,575 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:07:02,575 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 14:07:02,575 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965533198] [2020-10-28 14:07:02,578 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 14:07:02,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:07:02,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 14:07:02,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 14:07:02,581 INFO L87 Difference]: Start difference. First operand 9029 states and 13498 transitions. Second operand 7 states. [2020-10-28 14:07:02,735 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-10-28 14:07:04,732 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-28 14:08:14,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:08:14,359 INFO L93 Difference]: Finished difference Result 27410 states and 41978 transitions. [2020-10-28 14:08:14,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 14:08:14,371 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 143 [2020-10-28 14:08:14,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:08:14,494 INFO L225 Difference]: With dead ends: 27410 [2020-10-28 14:08:14,494 INFO L226 Difference]: Without dead ends: 18387 [2020-10-28 14:08:14,527 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-28 14:08:14,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18387 states. [2020-10-28 14:08:15,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18387 to 18080. [2020-10-28 14:08:15,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18080 states. [2020-10-28 14:08:15,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18080 states to 18080 states and 24579 transitions. [2020-10-28 14:08:15,145 INFO L78 Accepts]: Start accepts. Automaton has 18080 states and 24579 transitions. Word has length 143 [2020-10-28 14:08:15,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:08:15,146 INFO L481 AbstractCegarLoop]: Abstraction has 18080 states and 24579 transitions. [2020-10-28 14:08:15,146 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 14:08:15,147 INFO L276 IsEmpty]: Start isEmpty. Operand 18080 states and 24579 transitions. [2020-10-28 14:08:15,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2020-10-28 14:08:15,150 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:08:15,150 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:08:15,150 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 14:08:15,150 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:08:15,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:08:15,151 INFO L82 PathProgramCache]: Analyzing trace with hash 138512422, now seen corresponding path program 1 times [2020-10-28 14:08:15,151 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:08:15,152 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [620121627] [2020-10-28 14:08:15,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:08:15,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:08:15,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:08:15,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:08:15,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:08:16,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:08:17,000 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:08:17,001 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 177 [2020-10-28 14:08:17,001 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 14:08:17,001 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1797 [2020-10-28 14:08:17,002 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:08:17,002 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:08:17,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:08:17,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 131 [2020-10-28 14:08:17,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 14:08:17,003 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:08:17,182 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-28 14:08:17,184 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:08:17,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:08:17,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:08:17,195 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:08:17,195 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:08:17,196 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:08:17,196 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 14:08:17,196 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:08:17,196 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:08:17,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:08:17,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:08:17,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:08:17,197 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:08:17,244 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 14:08:17,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:08:17,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:08:17,397 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:08:17,397 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 124 [2020-10-28 14:08:17,397 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:08:17,398 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 121 [2020-10-28 14:08:17,398 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:08:17,398 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:08:17,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:08:17,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 116 [2020-10-28 14:08:17,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 14:08:17,399 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:08:17,484 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:08:17,485 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [620121627] [2020-10-28 14:08:17,485 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:08:17,485 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 14:08:17,485 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61796528] [2020-10-28 14:08:17,486 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 14:08:17,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:08:17,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 14:08:17,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 14:08:17,487 INFO L87 Difference]: Start difference. First operand 18080 states and 24579 transitions. Second operand 5 states. [2020-10-28 14:08:17,663 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 66