/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.3 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/eca-rers2012/Problem19_label13.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-29 08:45:12,743 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-29 08:45:12,748 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-29 08:45:12,796 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-29 08:45:12,797 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-29 08:45:12,799 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-29 08:45:12,801 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-29 08:45:12,804 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-29 08:45:12,807 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-29 08:45:12,808 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-29 08:45:12,810 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-29 08:45:12,812 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-29 08:45:12,812 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-29 08:45:12,814 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-29 08:45:12,816 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-29 08:45:12,818 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-29 08:45:12,819 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-29 08:45:12,821 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-29 08:45:12,824 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-29 08:45:12,827 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-29 08:45:12,830 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-29 08:45:12,831 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-29 08:45:12,833 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-29 08:45:12,835 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-29 08:45:12,839 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-29 08:45:12,840 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-29 08:45:12,840 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-29 08:45:12,842 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-29 08:45:12,843 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-29 08:45:12,845 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-29 08:45:12,845 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-29 08:45:12,846 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-29 08:45:12,848 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-29 08:45:12,849 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-29 08:45:12,850 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-29 08:45:12,851 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-29 08:45:12,852 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-29 08:45:12,852 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-29 08:45:12,852 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-29 08:45:12,854 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-29 08:45:12,855 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-29 08:45:12,857 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-29 08:45:12,899 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-29 08:45:12,899 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-29 08:45:12,901 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-29 08:45:12,901 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-29 08:45:12,902 INFO L138 SettingsManager]: * Use SBE=true [2020-10-29 08:45:12,902 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-29 08:45:12,902 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-29 08:45:12,902 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-29 08:45:12,903 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-29 08:45:12,903 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-29 08:45:12,903 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-29 08:45:12,903 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-29 08:45:12,903 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-29 08:45:12,903 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-29 08:45:12,904 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-29 08:45:12,904 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-29 08:45:12,904 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-29 08:45:12,904 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-29 08:45:12,905 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-29 08:45:12,905 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-29 08:45:12,905 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-29 08:45:12,905 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 08:45:12,918 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-29 08:45:12,918 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-29 08:45:12,919 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-29 08:45:12,919 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-29 08:45:12,919 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-29 08:45:12,919 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-29 08:45:12,920 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-29 08:45:12,920 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true;unknown-allowed=true; [2020-10-29 08:45:13,400 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-29 08:45:13,438 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-29 08:45:13,442 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-29 08:45:13,444 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-29 08:45:13,445 INFO L275 PluginConnector]: CDTParser initialized [2020-10-29 08:45:13,447 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem19_label13.c [2020-10-29 08:45:13,541 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ae8d64ff5/4baadb399502435796795892a9b79350/FLAGacb73c101 [2020-10-29 08:45:15,019 INFO L306 CDTParser]: Found 1 translation units. [2020-10-29 08:45:15,020 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem19_label13.c [2020-10-29 08:45:15,122 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ae8d64ff5/4baadb399502435796795892a9b79350/FLAGacb73c101 [2020-10-29 08:45:15,198 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ae8d64ff5/4baadb399502435796795892a9b79350 [2020-10-29 08:45:15,202 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-29 08:45:15,213 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-29 08:45:15,218 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-29 08:45:15,218 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-29 08:45:15,224 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-29 08:45:15,226 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 08:45:15" (1/1) ... [2020-10-29 08:45:15,232 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@726f201a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:45:15, skipping insertion in model container [2020-10-29 08:45:15,233 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 08:45:15" (1/1) ... [2020-10-29 08:45:15,245 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-29 08:45:15,585 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-29 08:45:18,052 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 08:45:18,073 INFO L203 MainTranslator]: Completed pre-run [2020-10-29 08:45:19,233 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 08:45:19,298 INFO L208 MainTranslator]: Completed translation [2020-10-29 08:45:19,299 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:45:19 WrapperNode [2020-10-29 08:45:19,299 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-29 08:45:19,300 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-29 08:45:19,301 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-29 08:45:19,301 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-29 08:45:19,320 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:45:19" (1/1) ... [2020-10-29 08:45:19,320 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:45:19" (1/1) ... [2020-10-29 08:45:19,551 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:45:19" (1/1) ... [2020-10-29 08:45:19,552 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:45:19" (1/1) ... [2020-10-29 08:45:19,856 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:45:19" (1/1) ... [2020-10-29 08:45:19,932 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:45:19" (1/1) ... [2020-10-29 08:45:20,033 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:45:19" (1/1) ... [2020-10-29 08:45:20,170 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-29 08:45:20,172 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-29 08:45:20,173 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-29 08:45:20,173 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-29 08:45:20,174 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:45:19" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 08:45:20,268 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-29 08:45:20,269 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-29 08:45:20,269 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-29 08:45:20,269 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-29 08:45:20,269 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-29 08:45:20,270 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2020-10-29 08:45:20,270 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2020-10-29 08:45:20,270 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output5 [2020-10-29 08:45:20,270 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output6 [2020-10-29 08:45:20,270 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-29 08:45:20,271 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-29 08:45:20,271 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-29 08:45:20,271 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2020-10-29 08:45:20,271 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2020-10-29 08:45:20,271 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output5 [2020-10-29 08:45:20,272 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output6 [2020-10-29 08:45:20,272 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-29 08:45:20,272 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-29 08:45:20,272 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-29 08:45:20,272 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-29 08:45:20,273 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-29 08:45:20,273 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-29 08:45:20,273 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-29 08:45:20,273 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-29 08:45:20,273 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-29 08:45:20,274 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-29 08:45:20,274 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-29 08:45:20,274 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-29 08:45:20,274 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-29 08:45:37,273 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-29 08:45:37,274 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-29 08:45:37,280 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 08:45:37 BoogieIcfgContainer [2020-10-29 08:45:37,280 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-29 08:45:37,283 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-29 08:45:37,283 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-29 08:45:37,287 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-29 08:45:37,288 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.10 08:45:15" (1/3) ... [2020-10-29 08:45:37,289 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1651550b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 08:45:37, skipping insertion in model container [2020-10-29 08:45:37,290 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:45:19" (2/3) ... [2020-10-29 08:45:37,290 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1651550b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 08:45:37, skipping insertion in model container [2020-10-29 08:45:37,290 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 08:45:37" (3/3) ... [2020-10-29 08:45:37,293 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem19_label13.c [2020-10-29 08:45:37,309 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-29 08:45:37,318 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-29 08:45:37,338 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-29 08:45:37,399 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-29 08:45:37,399 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-29 08:45:37,399 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-29 08:45:37,399 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-29 08:45:37,400 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-29 08:45:37,400 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-29 08:45:37,400 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-29 08:45:37,400 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-29 08:45:37,462 INFO L276 IsEmpty]: Start isEmpty. Operand 1781 states. [2020-10-29 08:45:37,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-29 08:45:37,473 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 08:45:37,474 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] [2020-10-29 08:45:37,475 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 08:45:37,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 08:45:37,485 INFO L82 PathProgramCache]: Analyzing trace with hash 1774973053, now seen corresponding path program 1 times [2020-10-29 08:45:37,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 08:45:37,499 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2073769389] [2020-10-29 08:45:37,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 08:45:37,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:45:37,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:45:38,602 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:45:38,603 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-29 08:45:38,603 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:45:38,603 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 869 [2020-10-29 08:45:38,606 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:45:38,606 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:45:38,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 08:45:38,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 08:45:38,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-29 08:45:38,609 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-29 08:45:38,855 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 08:45:38,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:45:38,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:45:38,898 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:45:38,899 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 08:45:38,899 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:45:38,900 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 29 [2020-10-29 08:45:38,900 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:45:38,900 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:45:38,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 08:45:38,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 08:45:38,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 08:45:38,901 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 08:45:38,925 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 08:45:38,926 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2073769389] [2020-10-29 08:45:38,929 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 08:45:38,929 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-29 08:45:38,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762904764] [2020-10-29 08:45:38,935 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 08:45:38,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 08:45:38,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 08:45:38,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 08:45:38,963 INFO L87 Difference]: Start difference. First operand 1781 states. Second operand 4 states. [2020-10-29 08:46:14,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 08:46:14,749 INFO L93 Difference]: Finished difference Result 5100 states and 9572 transitions. [2020-10-29 08:46:14,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 08:46:14,754 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 42 [2020-10-29 08:46:14,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 08:46:14,821 INFO L225 Difference]: With dead ends: 5100 [2020-10-29 08:46:14,822 INFO L226 Difference]: Without dead ends: 3255 [2020-10-29 08:46:14,848 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 [2020-10-29 08:46:14,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3255 states. [2020-10-29 08:46:15,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3255 to 3209. [2020-10-29 08:46:15,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3209 states. [2020-10-29 08:46:15,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3209 states to 3209 states and 5178 transitions. [2020-10-29 08:46:15,155 INFO L78 Accepts]: Start accepts. Automaton has 3209 states and 5178 transitions. Word has length 42 [2020-10-29 08:46:15,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 08:46:15,156 INFO L481 AbstractCegarLoop]: Abstraction has 3209 states and 5178 transitions. [2020-10-29 08:46:15,156 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 08:46:15,157 INFO L276 IsEmpty]: Start isEmpty. Operand 3209 states and 5178 transitions. [2020-10-29 08:46:15,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-10-29 08:46:15,164 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 08:46:15,165 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] [2020-10-29 08:46:15,165 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-29 08:46:15,166 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 08:46:15,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 08:46:15,168 INFO L82 PathProgramCache]: Analyzing trace with hash 2071176820, now seen corresponding path program 1 times [2020-10-29 08:46:15,168 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 08:46:15,169 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [458751375] [2020-10-29 08:46:15,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 08:46:15,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:46:15,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:46:15,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:46:16,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:46:17,428 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:46:17,431 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 129 [2020-10-29 08:46:17,432 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 08:46:17,437 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2190 [2020-10-29 08:46:17,439 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:46:17,439 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:46:17,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-29 08:46:17,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 08:46:17,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 120 [2020-10-29 08:46:17,440 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-29 08:46:17,641 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 08:46:17,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:46:17,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:46:17,688 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:46:17,697 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 08:46:17,697 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:46:17,698 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 35 [2020-10-29 08:46:17,698 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:46:17,698 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:46:17,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 08:46:17,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 08:46:17,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 08:46:17,699 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 08:46:17,741 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-29 08:46:17,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:46:17,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:46:17,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:46:18,321 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:46:18,322 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-29 08:46:18,323 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 08:46:18,323 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 534 [2020-10-29 08:46:18,323 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:46:18,324 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:46:18,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 08:46:18,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-29 08:46:18,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-29 08:46:18,325 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 08:46:18,500 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-29 08:46:18,501 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [458751375] [2020-10-29 08:46:18,501 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 08:46:18,501 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-29 08:46:18,502 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487024414] [2020-10-29 08:46:18,504 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 08:46:18,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 08:46:18,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 08:46:18,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-29 08:46:18,507 INFO L87 Difference]: Start difference. First operand 3209 states and 5178 transitions. Second operand 7 states. [2020-10-29 08:46:18,670 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-29 08:47:13,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 08:47:13,837 INFO L93 Difference]: Finished difference Result 9466 states and 15408 transitions. [2020-10-29 08:47:13,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-29 08:47:13,839 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 117 [2020-10-29 08:47:13,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 08:47:13,885 INFO L225 Difference]: With dead ends: 9466 [2020-10-29 08:47:13,885 INFO L226 Difference]: Without dead ends: 6263 [2020-10-29 08:47:13,897 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-10-29 08:47:13,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6263 states. [2020-10-29 08:47:14,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6263 to 6135. [2020-10-29 08:47:14,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6135 states. [2020-10-29 08:47:14,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6135 states to 6135 states and 8970 transitions. [2020-10-29 08:47:14,126 INFO L78 Accepts]: Start accepts. Automaton has 6135 states and 8970 transitions. Word has length 117 [2020-10-29 08:47:14,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 08:47:14,129 INFO L481 AbstractCegarLoop]: Abstraction has 6135 states and 8970 transitions. [2020-10-29 08:47:14,129 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 08:47:14,129 INFO L276 IsEmpty]: Start isEmpty. Operand 6135 states and 8970 transitions. [2020-10-29 08:47:14,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2020-10-29 08:47:14,144 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 08:47:14,147 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] [2020-10-29 08:47:14,147 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-29 08:47:14,148 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 08:47:14,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 08:47:14,148 INFO L82 PathProgramCache]: Analyzing trace with hash -259991502, now seen corresponding path program 1 times [2020-10-29 08:47:14,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 08:47:14,150 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [157139076] [2020-10-29 08:47:14,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 08:47:14,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:47:14,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:47:14,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:47:15,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:47:16,285 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:47:16,285 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 155 [2020-10-29 08:47:16,285 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 08:47:16,286 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2048 [2020-10-29 08:47:16,286 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:47:16,286 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:47:16,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 08:47:16,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 08:47:16,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 107 [2020-10-29 08:47:16,287 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:47:16,493 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 08:47:16,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:47:16,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:47:16,520 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:47:16,520 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 08:47:16,521 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:47:16,521 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-29 08:47:16,521 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:47:16,521 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:47:16,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 08:47:16,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 08:47:16,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 08:47:16,522 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:47:16,567 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-29 08:47:16,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:47:16,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:47:16,825 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:47:16,826 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-10-29 08:47:16,826 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:47:16,826 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 225 [2020-10-29 08:47:16,826 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:47:16,827 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:47:16,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 08:47:16,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-29 08:47:16,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 102 [2020-10-29 08:47:16,827 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 08:47:16,970 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 08:47:16,971 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [157139076] [2020-10-29 08:47:16,971 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 08:47:16,971 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 08:47:16,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366973017] [2020-10-29 08:47:16,973 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 08:47:16,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 08:47:16,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 08:47:16,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-29 08:47:16,974 INFO L87 Difference]: Start difference. First operand 6135 states and 8970 transitions. Second operand 7 states. [2020-10-29 08:48:08,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 08:48:08,771 INFO L93 Difference]: Finished difference Result 18581 states and 27579 transitions. [2020-10-29 08:48:08,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-29 08:48:08,779 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 143 [2020-10-29 08:48:08,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 08:48:08,848 INFO L225 Difference]: With dead ends: 18581 [2020-10-29 08:48:08,848 INFO L226 Difference]: Without dead ends: 12452 [2020-10-29 08:48:08,867 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 [2020-10-29 08:48:08,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12452 states. [2020-10-29 08:48:09,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12452 to 12193. [2020-10-29 08:48:09,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12193 states. [2020-10-29 08:48:09,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12193 states to 12193 states and 16171 transitions. [2020-10-29 08:48:09,224 INFO L78 Accepts]: Start accepts. Automaton has 12193 states and 16171 transitions. Word has length 143 [2020-10-29 08:48:09,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 08:48:09,227 INFO L481 AbstractCegarLoop]: Abstraction has 12193 states and 16171 transitions. [2020-10-29 08:48:09,227 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 08:48:09,229 INFO L276 IsEmpty]: Start isEmpty. Operand 12193 states and 16171 transitions. [2020-10-29 08:48:09,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2020-10-29 08:48:09,234 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 08:48:09,234 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] [2020-10-29 08:48:09,235 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-29 08:48:09,235 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 08:48:09,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 08:48:09,235 INFO L82 PathProgramCache]: Analyzing trace with hash 138512422, now seen corresponding path program 1 times [2020-10-29 08:48:09,236 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 08:48:09,237 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1065345104] [2020-10-29 08:48:09,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 08:48:09,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:48:09,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:48:09,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:48:09,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:48:10,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:48:10,844 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:48:10,844 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 177 [2020-10-29 08:48:10,845 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 08:48:10,845 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1560 [2020-10-29 08:48:10,845 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:48:10,846 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:48:10,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 08:48:10,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 08:48:10,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 127 [2020-10-29 08:48:10,846 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 08:48:11,000 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-29 08:48:11,001 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 08:48:11,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:48:11,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:48:11,023 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:48:11,023 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 08:48:11,023 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:48:11,023 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-29 08:48:11,024 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:48:11,024 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:48:11,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 08:48:11,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 08:48:11,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 08:48:11,025 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 08:48:11,059 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-29 08:48:11,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:48:11,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:48:11,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:48:11,350 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:48:11,350 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 124 [2020-10-29 08:48:11,351 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 08:48:11,351 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 263 [2020-10-29 08:48:11,351 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:48:11,351 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:48:11,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 08:48:11,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-29 08:48:11,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 124 [2020-10-29 08:48:11,352 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 08:48:11,502 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 08:48:11,502 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1065345104] [2020-10-29 08:48:11,503 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 08:48:11,503 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 08:48:11,503 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151700414] [2020-10-29 08:48:11,504 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 08:48:11,504 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 08:48:11,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 08:48:11,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-29 08:48:11,505 INFO L87 Difference]: Start difference. First operand 12193 states and 16171 transitions. Second operand 7 states. [2020-10-29 08:48:11,676 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 68