/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=SHALLOWEST --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_label07.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 00:39:16,053 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 00:39:16,057 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 00:39:16,124 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 00:39:16,125 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 00:39:16,134 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 00:39:16,137 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 00:39:16,142 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 00:39:16,146 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 00:39:16,153 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 00:39:16,154 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 00:39:16,156 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 00:39:16,156 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 00:39:16,160 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 00:39:16,163 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 00:39:16,165 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 00:39:16,167 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 00:39:16,171 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 00:39:16,181 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 00:39:16,190 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 00:39:16,192 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 00:39:16,196 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 00:39:16,198 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 00:39:16,201 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 00:39:16,206 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 00:39:16,207 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 00:39:16,207 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 00:39:16,210 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 00:39:16,210 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 00:39:16,211 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 00:39:16,212 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 00:39:16,213 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 00:39:16,215 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 00:39:16,216 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 00:39:16,218 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 00:39:16,218 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 00:39:16,219 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 00:39:16,219 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 00:39:16,219 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 00:39:16,221 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 00:39:16,221 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 00:39:16,223 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-27 00:39:16,280 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 00:39:16,280 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 00:39:16,286 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 00:39:16,287 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 00:39:16,287 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 00:39:16,287 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 00:39:16,287 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 00:39:16,288 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 00:39:16,288 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 00:39:16,288 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 00:39:16,290 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 00:39:16,290 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 00:39:16,290 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 00:39:16,290 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 00:39:16,290 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 00:39:16,290 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 00:39:16,291 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 00:39:16,307 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 00:39:16,307 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 00:39:16,308 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 00:39:16,308 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 00:39:16,308 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 00:39:16,308 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 00:39:16,308 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 00:39:16,309 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 00:39:16,309 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 00:39:16,309 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 00:39:16,309 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 00:39:16,309 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 00:39:16,310 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 00:39:16,747 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 00:39:16,777 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 00:39:16,781 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 00:39:16,783 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 00:39:16,784 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 00:39:16,786 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem19_label07.c [2020-10-27 00:39:16,874 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f0f686042/77f398306f0746e081f7a2a11ab41c18/FLAG5f420adaf [2020-10-27 00:39:18,302 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 00:39:18,303 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem19_label07.c [2020-10-27 00:39:18,359 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f0f686042/77f398306f0746e081f7a2a11ab41c18/FLAG5f420adaf [2020-10-27 00:39:18,430 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f0f686042/77f398306f0746e081f7a2a11ab41c18 [2020-10-27 00:39:18,435 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 00:39:18,445 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 00:39:18,452 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 00:39:18,452 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 00:39:18,458 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 00:39:18,459 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 12:39:18" (1/1) ... [2020-10-27 00:39:18,467 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@d37d0ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:39:18, skipping insertion in model container [2020-10-27 00:39:18,468 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 12:39:18" (1/1) ... [2020-10-27 00:39:18,480 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 00:39:18,745 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 00:39:21,253 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 00:39:21,275 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 00:39:22,395 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 00:39:22,469 INFO L208 MainTranslator]: Completed translation [2020-10-27 00:39:22,470 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:39:22 WrapperNode [2020-10-27 00:39:22,471 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 00:39:22,472 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 00:39:22,472 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 00:39:22,473 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 00:39:22,492 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:39:22" (1/1) ... [2020-10-27 00:39:22,492 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:39:22" (1/1) ... [2020-10-27 00:39:22,614 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:39:22" (1/1) ... [2020-10-27 00:39:22,615 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:39:22" (1/1) ... [2020-10-27 00:39:22,910 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:39:22" (1/1) ... [2020-10-27 00:39:23,018 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:39:22" (1/1) ... [2020-10-27 00:39:23,081 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:39:22" (1/1) ... [2020-10-27 00:39:23,169 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 00:39:23,170 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 00:39:23,171 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 00:39:23,171 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 00:39:23,172 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:39:22" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 00:39:23,268 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 00:39:23,269 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 00:39:23,269 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 00:39:23,269 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-27 00:39:23,269 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-27 00:39:23,270 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2020-10-27 00:39:23,270 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2020-10-27 00:39:23,270 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output5 [2020-10-27 00:39:23,270 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output6 [2020-10-27 00:39:23,270 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 00:39:23,270 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-27 00:39:23,271 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-27 00:39:23,271 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2020-10-27 00:39:23,271 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2020-10-27 00:39:23,271 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output5 [2020-10-27 00:39:23,271 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output6 [2020-10-27 00:39:23,272 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 00:39:23,272 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 00:39:23,272 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 00:39:23,272 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 00:39:23,272 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 00:39:23,272 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-27 00:39:23,273 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 00:39:23,273 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 00:39:23,273 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 00:39:23,273 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 00:39:23,273 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 00:39:23,273 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 00:39:23,273 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 00:39:38,655 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 00:39:38,656 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-27 00:39:38,662 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 12:39:38 BoogieIcfgContainer [2020-10-27 00:39:38,663 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 00:39:38,665 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 00:39:38,666 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 00:39:38,670 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 00:39:38,670 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 12:39:18" (1/3) ... [2020-10-27 00:39:38,672 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ae90185 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 12:39:38, skipping insertion in model container [2020-10-27 00:39:38,672 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:39:22" (2/3) ... [2020-10-27 00:39:38,673 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ae90185 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 12:39:38, skipping insertion in model container [2020-10-27 00:39:38,673 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 12:39:38" (3/3) ... [2020-10-27 00:39:38,675 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem19_label07.c [2020-10-27 00:39:38,689 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 00:39:38,697 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 00:39:38,714 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 00:39:38,757 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 00:39:38,758 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 00:39:38,758 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 00:39:38,758 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 00:39:38,758 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 00:39:38,758 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 00:39:38,758 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 00:39:38,759 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 00:39:38,813 INFO L276 IsEmpty]: Start isEmpty. Operand 1781 states. [2020-10-27 00:39:38,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-27 00:39:38,825 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:39:38,827 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 00:39:38,828 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:39:38,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:39:38,836 INFO L82 PathProgramCache]: Analyzing trace with hash 1891861893, now seen corresponding path program 1 times [2020-10-27 00:39:38,848 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:39:38,849 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1366393695] [2020-10-27 00:39:38,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:39:39,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:39:39,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:39:39,914 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:39:39,914 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-27 00:39:39,914 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:39:39,914 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 767 [2020-10-27 00:39:39,918 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:39:39,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 00:39:39,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 00:39:39,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 69 [2020-10-27 00:39:39,921 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-10-27 00:39:40,162 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:39:40,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:39:40,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:39:40,245 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:39:40,245 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:39:40,246 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:39:40,246 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 60 [2020-10-27 00:39:40,246 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:39:40,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:39:40,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:39:40,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 00:39:40,247 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:39:40,288 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 00:39:40,290 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1366393695] [2020-10-27 00:39:40,292 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 00:39:40,293 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 00:39:40,295 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56361598] [2020-10-27 00:39:40,307 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 00:39:40,308 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:39:40,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 00:39:40,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 00:39:40,336 INFO L87 Difference]: Start difference. First operand 1781 states. Second operand 5 states. [2020-10-27 00:39:41,431 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2020-10-27 00:40:29,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:40:29,449 INFO L93 Difference]: Finished difference Result 6592 states and 12529 transitions. [2020-10-27 00:40:29,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 00:40:29,454 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 68 [2020-10-27 00:40:29,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:40:29,524 INFO L225 Difference]: With dead ends: 6592 [2020-10-27 00:40:29,525 INFO L226 Difference]: Without dead ends: 4743 [2020-10-27 00:40:29,544 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-27 00:40:29,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4743 states. [2020-10-27 00:40:29,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4743 to 4622. [2020-10-27 00:40:29,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4622 states. [2020-10-27 00:40:29,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4622 states to 4622 states and 8149 transitions. [2020-10-27 00:40:29,954 INFO L78 Accepts]: Start accepts. Automaton has 4622 states and 8149 transitions. Word has length 68 [2020-10-27 00:40:29,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:40:29,958 INFO L481 AbstractCegarLoop]: Abstraction has 4622 states and 8149 transitions. [2020-10-27 00:40:29,958 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 00:40:29,958 INFO L276 IsEmpty]: Start isEmpty. Operand 4622 states and 8149 transitions. [2020-10-27 00:40:29,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2020-10-27 00:40:29,986 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:40:29,987 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-10-27 00:40:29,988 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 00:40:29,990 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:40:29,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:40:29,992 INFO L82 PathProgramCache]: Analyzing trace with hash -2022260981, now seen corresponding path program 1 times [2020-10-27 00:40:29,992 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:40:29,993 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [978653483] [2020-10-27 00:40:29,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:40:30,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:40:30,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:40:30,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:40:32,382 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:40:32,383 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 152 [2020-10-27 00:40:32,383 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 00:40:32,384 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2272 [2020-10-27 00:40:32,387 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:40:32,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 00:40:32,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 00:40:32,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-10-27 00:40:32,394 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 8 [2020-10-27 00:40:32,617 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:40:32,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:40:32,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:40:32,662 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:40:32,664 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:40:32,665 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:40:32,665 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 32 [2020-10-27 00:40:32,674 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:40:32,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:40:32,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:40:32,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 00:40:32,675 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 00:40:32,735 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:40:32,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:40:32,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:40:32,973 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:40:32,974 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-27 00:40:32,974 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:40:32,974 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 199 [2020-10-27 00:40:32,974 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:40:32,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:40:32,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:40:32,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 73 [2020-10-27 00:40:32,975 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:40:33,146 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 00:40:33,147 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [978653483] [2020-10-27 00:40:33,147 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 00:40:33,147 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 00:40:33,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819221351] [2020-10-27 00:40:33,150 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 00:40:33,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:40:33,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 00:40:33,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 00:40:33,154 INFO L87 Difference]: Start difference. First operand 4622 states and 8149 transitions. Second operand 7 states. [2020-10-27 00:40:33,321 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-10-27 00:40:38,374 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-10-27 00:41:34,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:41:34,226 INFO L93 Difference]: Finished difference Result 13864 states and 24689 transitions. [2020-10-27 00:41:34,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 00:41:34,229 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 140 [2020-10-27 00:41:34,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:41:34,298 INFO L225 Difference]: With dead ends: 13864 [2020-10-27 00:41:34,298 INFO L226 Difference]: Without dead ends: 9248 [2020-10-27 00:41:34,317 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-27 00:41:34,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9248 states. [2020-10-27 00:41:34,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9248 to 9107. [2020-10-27 00:41:34,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9107 states. [2020-10-27 00:41:34,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9107 states to 9107 states and 15540 transitions. [2020-10-27 00:41:34,739 INFO L78 Accepts]: Start accepts. Automaton has 9107 states and 15540 transitions. Word has length 140 [2020-10-27 00:41:34,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:41:34,743 INFO L481 AbstractCegarLoop]: Abstraction has 9107 states and 15540 transitions. [2020-10-27 00:41:34,743 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 00:41:34,743 INFO L276 IsEmpty]: Start isEmpty. Operand 9107 states and 15540 transitions. [2020-10-27 00:41:34,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2020-10-27 00:41:34,757 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:41:34,757 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-10-27 00:41:34,758 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 00:41:34,758 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:41:34,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:41:34,760 INFO L82 PathProgramCache]: Analyzing trace with hash 1733126847, now seen corresponding path program 1 times [2020-10-27 00:41:34,762 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:41:34,763 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1140657937] [2020-10-27 00:41:34,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:41:34,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:41:34,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:41:35,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:41:36,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:41:36,742 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:41:36,742 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 207 [2020-10-27 00:41:36,742 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 00:41:36,742 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1884 [2020-10-27 00:41:36,745 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:41:36,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 00:41:36,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 00:41:36,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 198 [2020-10-27 00:41:36,746 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 00:41:36,927 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:41:36,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:41:36,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:41:36,954 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:41:36,954 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:41:36,954 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:41:36,955 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-27 00:41:36,955 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:41:36,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:41:36,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:41:36,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 00:41:36,956 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:41:36,993 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:41:37,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:41:37,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:41:37,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:41:37,380 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:41:37,381 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 128 [2020-10-27 00:41:37,381 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 00:41:37,381 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 353 [2020-10-27 00:41:37,381 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:41:37,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:41:37,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:41:37,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 128 [2020-10-27 00:41:37,382 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:41:37,560 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-27 00:41:37,560 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1140657937] [2020-10-27 00:41:37,561 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 00:41:37,561 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 00:41:37,561 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46515961] [2020-10-27 00:41:37,562 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 00:41:37,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:41:37,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 00:41:37,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 00:41:37,563 INFO L87 Difference]: Start difference. First operand 9107 states and 15540 transitions. Second operand 7 states. [2020-10-27 00:42:35,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:42:35,888 INFO L93 Difference]: Finished difference Result 27420 states and 47779 transitions. [2020-10-27 00:42:35,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 00:42:35,892 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 195 [2020-10-27 00:42:35,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:42:35,993 INFO L225 Difference]: With dead ends: 27420 [2020-10-27 00:42:35,993 INFO L226 Difference]: Without dead ends: 18319 [2020-10-27 00:42:36,025 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-10-27 00:42:36,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18319 states. [2020-10-27 00:42:36,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18319 to 17995. [2020-10-27 00:42:36,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17995 states. [2020-10-27 00:42:36,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17995 states to 17995 states and 27100 transitions. [2020-10-27 00:42:36,611 INFO L78 Accepts]: Start accepts. Automaton has 17995 states and 27100 transitions. Word has length 195 [2020-10-27 00:42:36,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:42:36,613 INFO L481 AbstractCegarLoop]: Abstraction has 17995 states and 27100 transitions. [2020-10-27 00:42:36,613 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 00:42:36,613 INFO L276 IsEmpty]: Start isEmpty. Operand 17995 states and 27100 transitions. [2020-10-27 00:42:36,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 265 [2020-10-27 00:42:36,620 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:42:36,622 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 00:42:36,622 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 00:42:36,623 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:42:36,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:42:36,625 INFO L82 PathProgramCache]: Analyzing trace with hash -2095473967, now seen corresponding path program 1 times [2020-10-27 00:42:36,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:42:36,626 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [55710057] [2020-10-27 00:42:36,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:42:36,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:42:36,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:42:36,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:42:37,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:42:37,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:42:41,726 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:42:41,726 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 278 [2020-10-27 00:42:41,727 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 00:42:41,727 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5025 [2020-10-27 00:42:41,727 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:42:41,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 00:42:41,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 00:42:41,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 107 [2020-10-27 00:42:41,728 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:42:41,936 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-27 00:42:41,939 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:42:41,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:42:41,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:42:41,960 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:42:41,961 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:42:41,961 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:42:41,961 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-27 00:42:41,961 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:42:41,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:42:41,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:42:41,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 00:42:41,962 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:42:42,013 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:42:42,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:42:42,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:42:42,236 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:42:42,237 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-10-27 00:42:42,237 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:42:42,237 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 198 [2020-10-27 00:42:42,237 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:42:42,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:42:42,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:42:42,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 102 [2020-10-27 00:42:42,242 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-27 00:42:42,344 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2020-10-27 00:42:42,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:42:42,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:42:42,445 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:42:42,445 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 96 [2020-10-27 00:42:42,445 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:42:42,445 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 66 [2020-10-27 00:42:42,446 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:42:42,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 00:42:42,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 93 [2020-10-27 00:42:42,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 00:42:42,446 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:42:42,551 INFO L134 CoverageAnalysis]: Checked inductivity of 215 backedges. 120 proven. 90 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-27 00:42:42,552 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [55710057] [2020-10-27 00:42:42,552 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 00:42:42,552 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 00:42:42,552 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656046090] [2020-10-27 00:42:42,554 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 00:42:42,554 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:42:42,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 00:42:42,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 00:42:42,556 INFO L87 Difference]: Start difference. First operand 17995 states and 27100 transitions. Second operand 7 states. [2020-10-27 00:42:42,701 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-10-27 00:42:46,431 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 66