/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/Problem13_label54.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-26 23:17:35,114 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-26 23:17:35,120 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-26 23:17:35,188 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-26 23:17:35,189 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-26 23:17:35,196 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-26 23:17:35,199 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-26 23:17:35,207 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-26 23:17:35,211 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-26 23:17:35,219 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-26 23:17:35,221 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-26 23:17:35,222 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-26 23:17:35,223 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-26 23:17:35,226 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-26 23:17:35,229 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-26 23:17:35,231 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-26 23:17:35,233 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-26 23:17:35,236 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-26 23:17:35,246 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-26 23:17:35,256 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-26 23:17:35,258 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-26 23:17:35,261 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-26 23:17:35,262 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-26 23:17:35,266 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-26 23:17:35,276 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-26 23:17:35,276 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-26 23:17:35,277 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-26 23:17:35,279 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-26 23:17:35,280 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-26 23:17:35,281 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-26 23:17:35,282 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-26 23:17:35,283 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-26 23:17:35,286 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-26 23:17:35,286 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-26 23:17:35,288 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-26 23:17:35,288 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-26 23:17:35,289 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-26 23:17:35,298 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-26 23:17:35,298 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-26 23:17:35,300 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-26 23:17:35,301 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-26 23:17:35,311 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 [2020-10-26 23:17:35,369 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-26 23:17:35,369 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-26 23:17:35,374 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-26 23:17:35,374 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-26 23:17:35,374 INFO L138 SettingsManager]: * Use SBE=true [2020-10-26 23:17:35,375 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-26 23:17:35,375 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-26 23:17:35,375 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-26 23:17:35,375 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-26 23:17:35,375 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-26 23:17:35,377 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-26 23:17:35,377 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-26 23:17:35,377 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-26 23:17:35,377 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-26 23:17:35,377 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-26 23:17:35,378 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-26 23:17:35,378 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-26 23:17:35,378 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-26 23:17:35,378 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-26 23:17:35,378 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-26 23:17:35,379 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-26 23:17:35,379 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 23:17:35,379 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-26 23:17:35,379 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-26 23:17:35,379 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-26 23:17:35,380 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-26 23:17:35,380 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-26 23:17:35,380 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-26 23:17:35,380 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-26 23:17:35,380 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-26 23:17:35,899 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-26 23:17:35,933 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-26 23:17:35,936 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-26 23:17:35,938 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-26 23:17:35,939 INFO L275 PluginConnector]: CDTParser initialized [2020-10-26 23:17:35,940 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem13_label54.c [2020-10-26 23:17:36,047 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e0d2f9671/a30444f76ffc459d945db2be2e969fb8/FLAG965cb0680 [2020-10-26 23:17:37,218 INFO L306 CDTParser]: Found 1 translation units. [2020-10-26 23:17:37,219 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem13_label54.c [2020-10-26 23:17:37,266 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e0d2f9671/a30444f76ffc459d945db2be2e969fb8/FLAG965cb0680 [2020-10-26 23:17:37,613 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e0d2f9671/a30444f76ffc459d945db2be2e969fb8 [2020-10-26 23:17:37,616 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-26 23:17:37,623 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-26 23:17:37,625 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-26 23:17:37,626 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-26 23:17:37,630 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-26 23:17:37,632 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 11:17:37" (1/1) ... [2020-10-26 23:17:37,636 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@dd4ab53 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:17:37, skipping insertion in model container [2020-10-26 23:17:37,636 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 11:17:37" (1/1) ... [2020-10-26 23:17:37,647 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-26 23:17:37,813 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-26 23:17:39,690 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 23:17:39,708 INFO L203 MainTranslator]: Completed pre-run [2020-10-26 23:17:40,746 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 23:17:40,815 INFO L208 MainTranslator]: Completed translation [2020-10-26 23:17:40,816 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:17:40 WrapperNode [2020-10-26 23:17:40,816 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-26 23:17:40,817 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-26 23:17:40,817 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-26 23:17:40,817 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-26 23:17:40,831 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:17:40" (1/1) ... [2020-10-26 23:17:40,831 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:17:40" (1/1) ... [2020-10-26 23:17:40,962 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:17:40" (1/1) ... [2020-10-26 23:17:40,963 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:17:40" (1/1) ... [2020-10-26 23:17:41,162 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:17:40" (1/1) ... [2020-10-26 23:17:41,210 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:17:40" (1/1) ... [2020-10-26 23:17:41,258 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:17:40" (1/1) ... [2020-10-26 23:17:41,306 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-26 23:17:41,308 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-26 23:17:41,308 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-26 23:17:41,308 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-26 23:17:41,310 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:17:40" (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 [2020-10-26 23:17:41,518 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-26 23:17:41,519 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-26 23:17:41,519 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-26 23:17:41,519 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-26 23:17:41,519 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-26 23:17:41,519 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2020-10-26 23:17:41,520 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2020-10-26 23:17:41,520 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-26 23:17:41,520 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-26 23:17:41,520 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-26 23:17:41,520 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2020-10-26 23:17:41,520 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2020-10-26 23:17:41,521 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-26 23:17:41,521 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-26 23:17:41,521 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-26 23:17:41,521 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-26 23:17:41,521 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-26 23:17:41,521 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-26 23:17:41,522 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-26 23:17:41,522 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-26 23:17:41,522 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-26 23:17:41,522 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-26 23:17:41,522 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-26 23:17:41,522 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-26 23:17:41,522 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-26 23:17:52,051 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-26 23:17:52,051 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-26 23:17:52,057 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 11:17:52 BoogieIcfgContainer [2020-10-26 23:17:52,057 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-26 23:17:52,060 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-26 23:17:52,060 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-26 23:17:52,064 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-26 23:17:52,065 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 11:17:37" (1/3) ... [2020-10-26 23:17:52,066 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b402395 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 11:17:52, skipping insertion in model container [2020-10-26 23:17:52,066 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:17:40" (2/3) ... [2020-10-26 23:17:52,067 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b402395 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 11:17:52, skipping insertion in model container [2020-10-26 23:17:52,067 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 11:17:52" (3/3) ... [2020-10-26 23:17:52,070 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem13_label54.c [2020-10-26 23:17:52,084 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-26 23:17:52,092 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-26 23:17:52,109 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-26 23:17:52,164 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-26 23:17:52,164 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-26 23:17:52,164 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-26 23:17:52,164 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-26 23:17:52,165 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-26 23:17:52,165 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-26 23:17:52,165 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-26 23:17:52,165 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-26 23:17:52,207 INFO L276 IsEmpty]: Start isEmpty. Operand 1123 states. [2020-10-26 23:17:52,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-26 23:17:52,215 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:17:52,216 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] [2020-10-26 23:17:52,217 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:17:52,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:17:52,226 INFO L82 PathProgramCache]: Analyzing trace with hash -759338582, now seen corresponding path program 1 times [2020-10-26 23:17:52,240 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:17:52,240 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [770648904] [2020-10-26 23:17:52,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:17:52,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:17:52,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:17:53,150 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:17:53,150 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-26 23:17:53,151 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:17:53,151 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 619 [2020-10-26 23:17:53,153 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:17:53,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 23:17:53,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 23:17:53,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-26 23:17:53,155 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-26 23:17:53,299 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:17:53,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:17:53,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:17:53,359 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:17:53,359 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:17:53,359 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:17:53,359 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 46 [2020-10-26 23:17:53,360 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:17:53,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:17:53,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:17:53,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 23:17:53,361 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 23:17:53,385 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 23:17:53,386 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [770648904] [2020-10-26 23:17:53,389 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 23:17:53,389 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-26 23:17:53,390 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895801160] [2020-10-26 23:17:53,396 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-26 23:17:53,396 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:17:53,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-26 23:17:53,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-26 23:17:53,424 INFO L87 Difference]: Start difference. First operand 1123 states. Second operand 5 states. [2020-10-26 23:18:12,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:18:12,438 INFO L93 Difference]: Finished difference Result 3235 states and 5915 transitions. [2020-10-26 23:18:12,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 23:18:12,441 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 34 [2020-10-26 23:18:12,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:18:12,485 INFO L225 Difference]: With dead ends: 3235 [2020-10-26 23:18:12,487 INFO L226 Difference]: Without dead ends: 2027 [2020-10-26 23:18:12,509 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-26 23:18:12,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2027 states. [2020-10-26 23:18:12,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2027 to 2010. [2020-10-26 23:18:12,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2010 states. [2020-10-26 23:18:12,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2010 states to 2010 states and 3292 transitions. [2020-10-26 23:18:12,740 INFO L78 Accepts]: Start accepts. Automaton has 2010 states and 3292 transitions. Word has length 34 [2020-10-26 23:18:12,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:18:12,741 INFO L481 AbstractCegarLoop]: Abstraction has 2010 states and 3292 transitions. [2020-10-26 23:18:12,741 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-26 23:18:12,741 INFO L276 IsEmpty]: Start isEmpty. Operand 2010 states and 3292 transitions. [2020-10-26 23:18:12,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-10-26 23:18:12,747 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:18:12,748 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 23:18:12,748 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-26 23:18:12,749 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:18:12,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:18:12,750 INFO L82 PathProgramCache]: Analyzing trace with hash 1763092578, now seen corresponding path program 1 times [2020-10-26 23:18:12,750 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:18:12,750 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1395337892] [2020-10-26 23:18:12,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:18:12,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:18:12,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:18:13,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:18:14,751 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:18:14,751 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 121 [2020-10-26 23:18:14,752 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 23:18:14,752 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1898 [2020-10-26 23:18:14,753 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:18:14,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 23:18:14,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 23:18:14,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 81 [2020-10-26 23:18:14,757 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-26 23:18:14,887 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:18:14,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:18:14,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:18:14,934 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:18:14,935 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:18:14,935 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:18:14,935 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 33 [2020-10-26 23:18:14,936 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:18:14,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:18:14,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:18:14,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 23:18:14,940 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-26 23:18:14,977 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:18:15,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:18:15,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:18:15,236 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:18:15,236 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-26 23:18:15,236 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:18:15,236 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 222 [2020-10-26 23:18:15,237 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:18:15,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:18:15,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:18:15,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-26 23:18:15,238 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 23:18:15,405 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 23:18:15,406 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1395337892] [2020-10-26 23:18:15,406 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 23:18:15,406 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-26 23:18:15,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019393302] [2020-10-26 23:18:15,410 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 23:18:15,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:18:15,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 23:18:15,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-26 23:18:15,424 INFO L87 Difference]: Start difference. First operand 2010 states and 3292 transitions. Second operand 7 states. [2020-10-26 23:18:36,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:18:36,606 INFO L93 Difference]: Finished difference Result 5802 states and 9564 transitions. [2020-10-26 23:18:36,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-26 23:18:36,617 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 109 [2020-10-26 23:18:36,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:18:36,647 INFO L225 Difference]: With dead ends: 5802 [2020-10-26 23:18:36,648 INFO L226 Difference]: Without dead ends: 3798 [2020-10-26 23:18:36,656 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-10-26 23:18:36,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3798 states. [2020-10-26 23:18:36,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3798 to 3698. [2020-10-26 23:18:36,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3698 states. [2020-10-26 23:18:36,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3698 states to 3698 states and 5279 transitions. [2020-10-26 23:18:36,818 INFO L78 Accepts]: Start accepts. Automaton has 3698 states and 5279 transitions. Word has length 109 [2020-10-26 23:18:36,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:18:36,818 INFO L481 AbstractCegarLoop]: Abstraction has 3698 states and 5279 transitions. [2020-10-26 23:18:36,819 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 23:18:36,819 INFO L276 IsEmpty]: Start isEmpty. Operand 3698 states and 5279 transitions. [2020-10-26 23:18:36,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2020-10-26 23:18:36,833 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:18:36,834 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 23:18:36,834 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-26 23:18:36,834 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:18:36,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:18:36,836 INFO L82 PathProgramCache]: Analyzing trace with hash -208761082, now seen corresponding path program 1 times [2020-10-26 23:18:36,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:18:36,837 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [329686417] [2020-10-26 23:18:36,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:18:36,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:18:36,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:18:37,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:18:38,349 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:18:38,350 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 151 [2020-10-26 23:18:38,350 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 23:18:38,350 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1442 [2020-10-26 23:18:38,351 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:18:38,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 23:18:38,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 23:18:38,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 111 [2020-10-26 23:18:38,352 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:18:38,527 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:18:38,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:18:38,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:18:38,555 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:18:38,555 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:18:38,556 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:18:38,556 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-26 23:18:38,556 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:18:38,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:18:38,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:18:38,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 23:18:38,557 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:18:38,587 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:18:38,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:18:38,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:18:38,892 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:18:38,892 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 106 [2020-10-26 23:18:38,893 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:18:38,893 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 270 [2020-10-26 23:18:38,893 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:18:38,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:18:38,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:18:38,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 106 [2020-10-26 23:18:38,894 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:18:39,096 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 23:18:39,097 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [329686417] [2020-10-26 23:18:39,097 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 23:18:39,097 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-26 23:18:39,098 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121351846] [2020-10-26 23:18:39,098 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 23:18:39,099 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:18:39,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 23:18:39,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-26 23:18:39,100 INFO L87 Difference]: Start difference. First operand 3698 states and 5279 transitions. Second operand 8 states. [2020-10-26 23:19:11,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:19:11,655 INFO L93 Difference]: Finished difference Result 14310 states and 20983 transitions. [2020-10-26 23:19:11,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-26 23:19:11,656 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 139 [2020-10-26 23:19:11,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:19:11,725 INFO L225 Difference]: With dead ends: 14310 [2020-10-26 23:19:11,725 INFO L226 Difference]: Without dead ends: 10618 [2020-10-26 23:19:11,740 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2020-10-26 23:19:11,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10618 states. [2020-10-26 23:19:12,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10618 to 10525. [2020-10-26 23:19:12,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10525 states. [2020-10-26 23:19:12,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10525 states to 10525 states and 14135 transitions. [2020-10-26 23:19:12,102 INFO L78 Accepts]: Start accepts. Automaton has 10525 states and 14135 transitions. Word has length 139 [2020-10-26 23:19:12,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:19:12,105 INFO L481 AbstractCegarLoop]: Abstraction has 10525 states and 14135 transitions. [2020-10-26 23:19:12,105 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 23:19:12,105 INFO L276 IsEmpty]: Start isEmpty. Operand 10525 states and 14135 transitions. [2020-10-26 23:19:12,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2020-10-26 23:19:12,112 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:19:12,113 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, 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, 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] [2020-10-26 23:19:12,113 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-26 23:19:12,114 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:19:12,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:19:12,120 INFO L82 PathProgramCache]: Analyzing trace with hash 2083399662, now seen corresponding path program 1 times [2020-10-26 23:19:12,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:19:12,121 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [881334975] [2020-10-26 23:19:12,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:19:12,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:19:12,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:19:12,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:19:12,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:19:17,206 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:19:17,207 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 248 [2020-10-26 23:19:17,207 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 23:19:17,207 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-26 23:19:17,207 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:19:17,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 23:19:17,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 23:19:17,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 99 [2020-10-26 23:19:17,208 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:19:17,332 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:19:17,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:19:17,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:19:17,357 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:19:17,357 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:19:17,357 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:19:17,358 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-26 23:19:17,358 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:19:17,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:19:17,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:19:17,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 23:19:17,358 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:19:17,384 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:19:17,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:19:17,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:19:17,565 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:19:17,565 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-26 23:19:17,565 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:19:17,565 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 157 [2020-10-26 23:19:17,566 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:19:17,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:19:17,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:19:17,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 94 [2020-10-26 23:19:17,566 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:19:17,720 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2020-10-26 23:19:17,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:19:17,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:19:17,826 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:19:17,826 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 108 [2020-10-26 23:19:17,826 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:19:17,826 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 78 [2020-10-26 23:19:17,827 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:19:17,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 23:19:17,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 105 [2020-10-26 23:19:17,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 23:19:17,827 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:19:18,007 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 52 proven. 88 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-26 23:19:18,007 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [881334975] [2020-10-26 23:19:18,007 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 23:19:18,008 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 23:19:18,008 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796425386] [2020-10-26 23:19:18,009 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 23:19:18,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:19:18,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 23:19:18,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 23:19:18,010 INFO L87 Difference]: Start difference. First operand 10525 states and 14135 transitions. Second operand 7 states. [2020-10-26 23:19:41,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:19:41,191 INFO L93 Difference]: Finished difference Result 20487 states and 27937 transitions. [2020-10-26 23:19:41,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-26 23:19:41,193 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 234 [2020-10-26 23:19:41,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:19:41,259 INFO L225 Difference]: With dead ends: 20487 [2020-10-26 23:19:41,259 INFO L226 Difference]: Without dead ends: 10771 [2020-10-26 23:19:41,284 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2020-10-26 23:19:41,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10771 states. [2020-10-26 23:19:41,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10771 to 10647. [2020-10-26 23:19:41,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10647 states. [2020-10-26 23:19:41,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10647 states to 10647 states and 14377 transitions. [2020-10-26 23:19:41,626 INFO L78 Accepts]: Start accepts. Automaton has 10647 states and 14377 transitions. Word has length 234 [2020-10-26 23:19:41,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:19:41,628 INFO L481 AbstractCegarLoop]: Abstraction has 10647 states and 14377 transitions. [2020-10-26 23:19:41,628 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 23:19:41,628 INFO L276 IsEmpty]: Start isEmpty. Operand 10647 states and 14377 transitions. [2020-10-26 23:19:41,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2020-10-26 23:19:41,633 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:19:41,634 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, 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] [2020-10-26 23:19:41,634 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-26 23:19:41,634 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:19:41,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:19:41,635 INFO L82 PathProgramCache]: Analyzing trace with hash -831875574, now seen corresponding path program 1 times [2020-10-26 23:19:41,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:19:41,637 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2085547649] [2020-10-26 23:19:41,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:19:41,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:19:41,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:19:41,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:19:42,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:19:43,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:19:45,182 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:19:45,182 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 253 [2020-10-26 23:19:45,183 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 23:19:45,183 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3465 [2020-10-26 23:19:45,183 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:19:45,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 23:19:45,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 23:19:45,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 213 [2020-10-26 23:19:45,184 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:19:45,328 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:19:45,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:19:45,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:19:45,348 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:19:45,348 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:19:45,349 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:19:45,349 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-26 23:19:45,349 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:19:45,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:19:45,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:19:45,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 23:19:45,350 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:19:45,388 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:19:45,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:19:45,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:19:45,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:19:45,729 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:19:45,730 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 130 [2020-10-26 23:19:45,730 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 23:19:45,730 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 305 [2020-10-26 23:19:45,730 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:19:45,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:19:45,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:19:45,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 130 [2020-10-26 23:19:45,734 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-26 23:19:45,993 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2020-10-26 23:19:46,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:19:46,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:19:46,251 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:19:46,251 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-26 23:19:46,251 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:19:46,251 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 236 [2020-10-26 23:19:46,252 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:19:46,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:19:46,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:19:46,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-10-26 23:19:46,252 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:19:46,509 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 122 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-26 23:19:46,510 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2085547649] [2020-10-26 23:19:46,510 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 23:19:46,510 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 23:19:46,511 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211743044] [2020-10-26 23:19:46,511 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 23:19:46,512 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:19:46,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 23:19:46,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-10-26 23:19:46,513 INFO L87 Difference]: Start difference. First operand 10647 states and 14377 transitions. Second operand 8 states. [2020-10-26 23:20:08,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:20:08,599 INFO L93 Difference]: Finished difference Result 28638 states and 41337 transitions. [2020-10-26 23:20:08,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-26 23:20:08,602 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 239 [2020-10-26 23:20:08,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:20:08,692 INFO L225 Difference]: With dead ends: 28638 [2020-10-26 23:20:08,693 INFO L226 Difference]: Without dead ends: 18800 [2020-10-26 23:20:08,726 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-26 23:20:08,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18800 states. [2020-10-26 23:20:09,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18800 to 18587. [2020-10-26 23:20:09,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18587 states. [2020-10-26 23:20:09,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18587 states to 18587 states and 24490 transitions. [2020-10-26 23:20:09,321 INFO L78 Accepts]: Start accepts. Automaton has 18587 states and 24490 transitions. Word has length 239 [2020-10-26 23:20:09,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:20:09,322 INFO L481 AbstractCegarLoop]: Abstraction has 18587 states and 24490 transitions. [2020-10-26 23:20:09,322 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 23:20:09,323 INFO L276 IsEmpty]: Start isEmpty. Operand 18587 states and 24490 transitions. [2020-10-26 23:20:09,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2020-10-26 23:20:09,327 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:20:09,328 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, 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, 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] [2020-10-26 23:20:09,328 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-26 23:20:09,328 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:20:09,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:20:09,329 INFO L82 PathProgramCache]: Analyzing trace with hash 290897829, now seen corresponding path program 1 times [2020-10-26 23:20:09,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:20:09,329 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1320536112] [2020-10-26 23:20:09,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:20:09,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:20:09,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:20:09,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:20:10,548 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:20:10,548 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 255 [2020-10-26 23:20:10,548 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 23:20:10,549 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1150 [2020-10-26 23:20:10,549 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:20:10,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:20:10,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 110 [2020-10-26 23:20:10,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 110 [2020-10-26 23:20:10,550 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:20:10,705 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:20:10,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:20:10,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:20:10,715 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:20:10,715 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:20:10,716 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:20:10,716 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-26 23:20:10,716 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:20:10,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 23:20:10,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:20:10,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 23:20:10,717 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:20:10,753 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:20:10,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:20:10,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:20:10,876 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:20:10,876 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-26 23:20:10,877 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:20:10,877 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 98 [2020-10-26 23:20:10,877 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:20:10,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:20:10,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:20:10,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 95 [2020-10-26 23:20:10,878 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:20:10,914 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2020-10-26 23:20:10,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:20:10,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:20:11,167 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:20:11,168 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 108 [2020-10-26 23:20:11,168 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:20:11,168 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 219 [2020-10-26 23:20:11,169 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:20:11,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:20:11,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:20:11,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 108 [2020-10-26 23:20:11,169 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:20:11,348 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 149 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-26 23:20:11,349 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1320536112] [2020-10-26 23:20:11,351 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 23:20:11,351 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 23:20:11,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744933809] [2020-10-26 23:20:11,353 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 23:20:11,353 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:20:11,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 23:20:11,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 23:20:11,354 INFO L87 Difference]: Start difference. First operand 18587 states and 24490 transitions. Second operand 7 states. [2020-10-26 23:20:12,358 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-26 23:20:39,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:20:39,786 INFO L93 Difference]: Finished difference Result 37764 states and 51338 transitions. [2020-10-26 23:20:39,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 23:20:39,789 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 241 [2020-10-26 23:20:39,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:20:39,866 INFO L225 Difference]: With dead ends: 37764 [2020-10-26 23:20:39,866 INFO L226 Difference]: Without dead ends: 19986 [2020-10-26 23:20:39,908 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-26 23:20:39,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19986 states. [2020-10-26 23:20:40,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19986 to 19647. [2020-10-26 23:20:40,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19647 states. [2020-10-26 23:20:40,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19647 states to 19647 states and 24853 transitions. [2020-10-26 23:20:40,383 INFO L78 Accepts]: Start accepts. Automaton has 19647 states and 24853 transitions. Word has length 241 [2020-10-26 23:20:40,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:20:40,384 INFO L481 AbstractCegarLoop]: Abstraction has 19647 states and 24853 transitions. [2020-10-26 23:20:40,384 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 23:20:40,384 INFO L276 IsEmpty]: Start isEmpty. Operand 19647 states and 24853 transitions. [2020-10-26 23:20:40,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2020-10-26 23:20:40,389 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:20:40,390 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, 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, 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] [2020-10-26 23:20:40,390 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-26 23:20:40,390 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:20:40,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:20:40,391 INFO L82 PathProgramCache]: Analyzing trace with hash 1622404729, now seen corresponding path program 1 times [2020-10-26 23:20:40,391 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:20:40,391 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [546090105] [2020-10-26 23:20:40,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:20:40,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:20:40,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:20:40,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:20:41,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:20:41,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:20:44,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:20:44,094 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:20:44,094 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 270 [2020-10-26 23:20:44,095 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 23:20:44,095 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3631 [2020-10-26 23:20:44,095 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:20:44,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-26 23:20:44,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 23:20:44,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 261 [2020-10-26 23:20:44,096 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:20:44,337 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:20:44,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:20:44,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:20:44,356 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:20:44,356 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:20:44,357 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:20:44,357 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-26 23:20:44,357 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:20:44,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:20:44,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:20:44,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 23:20:44,358 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:20:44,406 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:20:44,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:20:44,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:20:44,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:20:44,814 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:20:44,814 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 130 [2020-10-26 23:20:44,814 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 23:20:44,814 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 370 [2020-10-26 23:20:44,815 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:20:44,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:20:44,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:20:44,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 130 [2020-10-26 23:20:44,815 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:20:44,989 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2020-10-26 23:20:45,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:20:45,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:20:45,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:20:45,360 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:20:45,361 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-26 23:20:45,361 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 23:20:45,361 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 349 [2020-10-26 23:20:45,361 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:20:45,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 23:20:45,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:20:45,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 94 [2020-10-26 23:20:45,362 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:20:46,069 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 118 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-10-26 23:20:46,069 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [546090105] [2020-10-26 23:20:46,070 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 23:20:46,070 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-26 23:20:46,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981310894] [2020-10-26 23:20:46,071 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-26 23:20:46,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:20:46,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-26 23:20:46,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-10-26 23:20:46,072 INFO L87 Difference]: Start difference. First operand 19647 states and 24853 transitions. Second operand 11 states. [2020-10-26 23:20:46,504 WARN L193 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 78 [2020-10-26 23:20:47,119 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 28 [2020-10-26 23:20:47,525 WARN L193 SmtUtils]: Spent 315.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 74 [2020-10-26 23:20:51,044 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2020-10-26 23:20:51,962 WARN L193 SmtUtils]: Spent 308.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 85 [2020-10-26 23:20:52,681 WARN L193 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 80 [2020-10-26 23:20:53,220 WARN L193 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 85 [2020-10-26 23:20:53,830 WARN L193 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 83 [2020-10-26 23:20:54,920 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 26 [2020-10-26 23:20:55,323 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 26 [2020-10-26 23:20:56,039 WARN L193 SmtUtils]: Spent 377.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 83 [2020-10-26 23:20:57,620 WARN L193 SmtUtils]: Spent 357.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 83 [2020-10-26 23:20:58,640 WARN L193 SmtUtils]: Spent 355.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 81 [2020-10-26 23:20:59,595 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 33 [2020-10-26 23:21:05,091 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 30 [2020-10-26 23:21:10,400 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 30 [2020-10-26 23:21:12,077 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 33