/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/Problem17_label17.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 00:09:38,081 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 00:09:38,084 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 00:09:38,128 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 00:09:38,129 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 00:09:38,130 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 00:09:38,132 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 00:09:38,135 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 00:09:38,137 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 00:09:38,138 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 00:09:38,139 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 00:09:38,141 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 00:09:38,141 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 00:09:38,143 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 00:09:38,144 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 00:09:38,145 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 00:09:38,147 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 00:09:38,148 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 00:09:38,150 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 00:09:38,153 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 00:09:38,155 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 00:09:38,156 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 00:09:38,158 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 00:09:38,159 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 00:09:38,163 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 00:09:38,163 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 00:09:38,164 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 00:09:38,165 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 00:09:38,166 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 00:09:38,167 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 00:09:38,168 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 00:09:38,169 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 00:09:38,170 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 00:09:38,171 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 00:09:38,172 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 00:09:38,173 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 00:09:38,174 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 00:09:38,174 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 00:09:38,175 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 00:09:38,191 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 00:09:38,192 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 00:09:38,194 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 00:09:38,225 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 00:09:38,226 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 00:09:38,228 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 00:09:38,228 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 00:09:38,228 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 00:09:38,229 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 00:09:38,229 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 00:09:38,229 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 00:09:38,230 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 00:09:38,230 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 00:09:38,230 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 00:09:38,231 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 00:09:38,231 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 00:09:38,231 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 00:09:38,231 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 00:09:38,232 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 00:09:38,232 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 00:09:38,232 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 00:09:38,233 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 00:09:38,233 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 00:09:38,233 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 00:09:38,233 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 00:09:38,234 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 00:09:38,234 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 00:09:38,234 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 00:09:38,234 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 00:09:38,234 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 00:09:38,235 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 00:09:38,235 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 00:09:38,235 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 00:09:38,611 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 00:09:38,638 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 00:09:38,641 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 00:09:38,642 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 00:09:38,643 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 00:09:38,644 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem17_label17.c [2020-10-27 00:09:38,739 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c4ce2cc98/5b55e8b0269d4c4d90afc2c10a5de95f/FLAG3fc845bbe [2020-10-27 00:09:39,814 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 00:09:39,815 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem17_label17.c [2020-10-27 00:09:39,845 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c4ce2cc98/5b55e8b0269d4c4d90afc2c10a5de95f/FLAG3fc845bbe [2020-10-27 00:09:40,328 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c4ce2cc98/5b55e8b0269d4c4d90afc2c10a5de95f [2020-10-27 00:09:40,332 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 00:09:40,340 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 00:09:40,344 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 00:09:40,344 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 00:09:40,348 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 00:09:40,350 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 12:09:40" (1/1) ... [2020-10-27 00:09:40,355 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6d6c2956 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:09:40, skipping insertion in model container [2020-10-27 00:09:40,355 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 12:09:40" (1/1) ... [2020-10-27 00:09:40,364 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 00:09:40,480 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 00:09:41,578 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 00:09:41,589 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 00:09:42,081 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 00:09:42,110 INFO L208 MainTranslator]: Completed translation [2020-10-27 00:09:42,110 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:09:42 WrapperNode [2020-10-27 00:09:42,111 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 00:09:42,112 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 00:09:42,112 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 00:09:42,113 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 00:09:42,129 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:09:42" (1/1) ... [2020-10-27 00:09:42,131 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:09:42" (1/1) ... [2020-10-27 00:09:42,250 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:09:42" (1/1) ... [2020-10-27 00:09:42,251 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:09:42" (1/1) ... [2020-10-27 00:09:42,377 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:09:42" (1/1) ... [2020-10-27 00:09:42,415 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:09:42" (1/1) ... [2020-10-27 00:09:42,439 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:09:42" (1/1) ... [2020-10-27 00:09:42,462 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 00:09:42,465 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 00:09:42,465 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 00:09:42,465 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 00:09:42,466 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:09:42" (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 00:09:42,565 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 00:09:42,565 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 00:09:42,565 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 00:09:42,566 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-27 00:09:42,566 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-27 00:09:42,566 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 00:09:42,567 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-27 00:09:42,567 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-27 00:09:42,567 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 00:09:42,568 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 00:09:42,569 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 00:09:42,569 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 00:09:42,569 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 00:09:42,569 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-27 00:09:42,569 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 00:09:42,570 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 00:09:42,571 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 00:09:42,571 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 00:09:42,571 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 00:09:42,571 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 00:09:42,571 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 00:09:54,200 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 00:09:54,200 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-27 00:09:54,205 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 12:09:54 BoogieIcfgContainer [2020-10-27 00:09:54,205 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 00:09:54,207 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 00:09:54,207 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 00:09:54,213 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 00:09:54,213 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 12:09:40" (1/3) ... [2020-10-27 00:09:54,215 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c649bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 12:09:54, skipping insertion in model container [2020-10-27 00:09:54,215 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:09:42" (2/3) ... [2020-10-27 00:09:54,215 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c649bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 12:09:54, skipping insertion in model container [2020-10-27 00:09:54,215 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 12:09:54" (3/3) ... [2020-10-27 00:09:54,217 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem17_label17.c [2020-10-27 00:09:54,229 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 00:09:54,235 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 00:09:54,251 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 00:09:54,299 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 00:09:54,299 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 00:09:54,300 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 00:09:54,300 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 00:09:54,300 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 00:09:54,300 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 00:09:54,300 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 00:09:54,300 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 00:09:54,341 INFO L276 IsEmpty]: Start isEmpty. Operand 607 states. [2020-10-27 00:09:54,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-27 00:09:54,350 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:09:54,351 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] [2020-10-27 00:09:54,351 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:09:54,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:09:54,360 INFO L82 PathProgramCache]: Analyzing trace with hash -146325245, now seen corresponding path program 1 times [2020-10-27 00:09:54,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:09:54,371 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1141306381] [2020-10-27 00:09:54,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:09:54,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:09:54,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:09:55,124 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:09:55,124 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-27 00:09:55,124 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:09:55,124 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 487 [2020-10-27 00:09:55,126 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:09:55,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 00:09:55,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 00:09:55,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-27 00:09:55,127 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 00:09:55,279 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:09:55,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:09:55,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:09:55,313 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:09:55,314 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:09:55,314 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:09:55,314 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-27 00:09:55,314 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:09:55,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:09:55,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:09:55,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 00:09:55,315 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:09:55,337 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 00:09:55,337 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1141306381] [2020-10-27 00:09:55,339 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 00:09:55,339 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-27 00:09:55,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973406002] [2020-10-27 00:09:55,345 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 00:09:55,345 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:09:55,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 00:09:55,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 00:09:55,367 INFO L87 Difference]: Start difference. First operand 607 states. Second operand 4 states. [2020-10-27 00:10:08,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:10:08,613 INFO L93 Difference]: Finished difference Result 1698 states and 3099 transitions. [2020-10-27 00:10:08,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 00:10:08,616 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 45 [2020-10-27 00:10:08,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:10:08,650 INFO L225 Difference]: With dead ends: 1698 [2020-10-27 00:10:08,650 INFO L226 Difference]: Without dead ends: 1012 [2020-10-27 00:10:08,665 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 00:10:08,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1012 states. [2020-10-27 00:10:08,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1012 to 987. [2020-10-27 00:10:08,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 987 states. [2020-10-27 00:10:08,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 987 states to 987 states and 1579 transitions. [2020-10-27 00:10:08,804 INFO L78 Accepts]: Start accepts. Automaton has 987 states and 1579 transitions. Word has length 45 [2020-10-27 00:10:08,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:10:08,805 INFO L481 AbstractCegarLoop]: Abstraction has 987 states and 1579 transitions. [2020-10-27 00:10:08,805 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 00:10:08,805 INFO L276 IsEmpty]: Start isEmpty. Operand 987 states and 1579 transitions. [2020-10-27 00:10:08,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-10-27 00:10:08,811 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:10:08,811 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:10:08,811 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 00:10:08,811 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:10:08,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:10:08,812 INFO L82 PathProgramCache]: Analyzing trace with hash 1292671230, now seen corresponding path program 1 times [2020-10-27 00:10:08,812 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:10:08,813 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2090478615] [2020-10-27 00:10:08,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:10:08,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:10:08,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:10:09,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:10:10,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:10:10,516 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:10:10,518 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 126 [2020-10-27 00:10:10,519 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 00:10:10,519 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1640 [2020-10-27 00:10:10,520 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:10:10,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 00:10:10,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 00:10:10,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-10-27 00:10:10,521 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 00:10:10,637 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:10:10,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:10:10,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:10:10,666 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:10:10,669 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:10:10,670 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:10:10,670 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-27 00:10:10,670 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:10:10,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:10:10,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:10:10,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 00:10:10,672 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 00:10:10,696 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:10:10,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:10:10,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:10:10,912 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:10:10,912 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-27 00:10:10,912 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:10:10,912 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 186 [2020-10-27 00:10:10,913 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:10:10,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:10:10,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:10:10,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-27 00:10:10,913 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:10:11,008 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 00:10:11,009 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2090478615] [2020-10-27 00:10:11,009 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 00:10:11,009 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 00:10:11,009 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951962677] [2020-10-27 00:10:11,012 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 00:10:11,012 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:10:11,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 00:10:11,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 00:10:11,016 INFO L87 Difference]: Start difference. First operand 987 states and 1579 transitions. Second operand 7 states. [2020-10-27 00:10:28,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:10:28,444 INFO L93 Difference]: Finished difference Result 2470 states and 4050 transitions. [2020-10-27 00:10:28,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 00:10:28,450 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 114 [2020-10-27 00:10:28,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:10:28,460 INFO L225 Difference]: With dead ends: 2470 [2020-10-27 00:10:28,460 INFO L226 Difference]: Without dead ends: 1489 [2020-10-27 00:10:28,464 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-27 00:10:28,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1489 states. [2020-10-27 00:10:28,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1489 to 1443. [2020-10-27 00:10:28,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1443 states. [2020-10-27 00:10:28,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1443 states to 1443 states and 2031 transitions. [2020-10-27 00:10:28,516 INFO L78 Accepts]: Start accepts. Automaton has 1443 states and 2031 transitions. Word has length 114 [2020-10-27 00:10:28,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:10:28,516 INFO L481 AbstractCegarLoop]: Abstraction has 1443 states and 2031 transitions. [2020-10-27 00:10:28,516 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 00:10:28,517 INFO L276 IsEmpty]: Start isEmpty. Operand 1443 states and 2031 transitions. [2020-10-27 00:10:28,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2020-10-27 00:10:28,519 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:10:28,520 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:10:28,520 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 00:10:28,520 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:10:28,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:10:28,520 INFO L82 PathProgramCache]: Analyzing trace with hash 173715735, now seen corresponding path program 1 times [2020-10-27 00:10:28,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:10:28,521 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [189873916] [2020-10-27 00:10:28,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:10:28,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:10:28,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:10:29,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:10:29,404 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:10:29,404 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 131 [2020-10-27 00:10:29,404 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 00:10:29,404 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 840 [2020-10-27 00:10:29,404 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:10:29,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 00:10:29,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 00:10:29,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 122 [2020-10-27 00:10:29,405 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:10:29,534 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:10:29,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:10:29,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:10:29,554 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:10:29,554 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:10:29,554 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:10:29,554 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-27 00:10:29,554 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:10:29,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:10:29,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:10:29,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 00:10:29,555 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:10:29,576 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:10:29,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:10:29,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:10:29,812 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:10:29,813 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-27 00:10:29,813 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:10:29,813 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 211 [2020-10-27 00:10:29,813 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:10:29,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 00:10:29,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:10:29,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-10-27 00:10:29,814 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:10:29,914 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 3 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 00:10:29,917 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [189873916] [2020-10-27 00:10:29,917 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 00:10:29,917 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 00:10:29,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238402950] [2020-10-27 00:10:29,919 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 00:10:29,919 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:10:29,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 00:10:29,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-27 00:10:29,921 INFO L87 Difference]: Start difference. First operand 1443 states and 2031 transitions. Second operand 8 states. [2020-10-27 00:10:52,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:10:52,749 INFO L93 Difference]: Finished difference Result 4394 states and 6700 transitions. [2020-10-27 00:10:52,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 00:10:52,751 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 119 [2020-10-27 00:10:52,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:10:52,779 INFO L225 Difference]: With dead ends: 4394 [2020-10-27 00:10:52,779 INFO L226 Difference]: Without dead ends: 3390 [2020-10-27 00:10:52,784 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-10-27 00:10:52,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3390 states. [2020-10-27 00:10:52,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3390 to 3297. [2020-10-27 00:10:52,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3297 states. [2020-10-27 00:10:52,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3297 states to 3297 states and 4585 transitions. [2020-10-27 00:10:52,923 INFO L78 Accepts]: Start accepts. Automaton has 3297 states and 4585 transitions. Word has length 119 [2020-10-27 00:10:52,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:10:52,926 INFO L481 AbstractCegarLoop]: Abstraction has 3297 states and 4585 transitions. [2020-10-27 00:10:52,926 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 00:10:52,926 INFO L276 IsEmpty]: Start isEmpty. Operand 3297 states and 4585 transitions. [2020-10-27 00:10:52,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-10-27 00:10:52,934 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:10:52,934 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:10:52,935 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 00:10:52,935 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:10:52,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:10:52,936 INFO L82 PathProgramCache]: Analyzing trace with hash -1063046370, now seen corresponding path program 1 times [2020-10-27 00:10:52,940 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:10:52,941 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [28765040] [2020-10-27 00:10:52,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:10:52,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:10:53,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:10:53,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:10:54,128 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:10:54,128 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 147 [2020-10-27 00:10:54,128 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 00:10:54,129 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1139 [2020-10-27 00:10:54,129 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:10:54,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 00:10:54,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 00:10:54,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 96 [2020-10-27 00:10:54,131 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 00:10:54,263 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:10:54,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:10:54,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:10:54,289 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:10:54,290 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:10:54,290 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:10:54,290 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-27 00:10:54,290 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:10:54,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:10:54,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:10:54,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 00:10:54,291 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:10:54,315 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:10:54,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:10:54,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:10:54,582 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:10:54,583 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-27 00:10:54,583 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:10:54,583 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 237 [2020-10-27 00:10:54,583 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:10:54,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:10:54,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:10:54,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 91 [2020-10-27 00:10:54,584 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:10:54,682 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 00:10:54,683 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [28765040] [2020-10-27 00:10:54,683 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 00:10:54,683 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 00:10:54,684 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177772234] [2020-10-27 00:10:54,685 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 00:10:54,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:10:54,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 00:10:54,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 00:10:54,686 INFO L87 Difference]: Start difference. First operand 3297 states and 4585 transitions. Second operand 7 states. [2020-10-27 00:11:08,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:11:08,442 INFO L93 Difference]: Finished difference Result 6791 states and 10099 transitions. [2020-10-27 00:11:08,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 00:11:08,444 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 135 [2020-10-27 00:11:08,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:11:08,463 INFO L225 Difference]: With dead ends: 6791 [2020-10-27 00:11:08,468 INFO L226 Difference]: Without dead ends: 3004 [2020-10-27 00:11:08,480 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-10-27 00:11:08,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3004 states. [2020-10-27 00:11:08,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3004 to 2404. [2020-10-27 00:11:08,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2404 states. [2020-10-27 00:11:08,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2404 states to 2404 states and 3188 transitions. [2020-10-27 00:11:08,572 INFO L78 Accepts]: Start accepts. Automaton has 2404 states and 3188 transitions. Word has length 135 [2020-10-27 00:11:08,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:11:08,572 INFO L481 AbstractCegarLoop]: Abstraction has 2404 states and 3188 transitions. [2020-10-27 00:11:08,573 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 00:11:08,573 INFO L276 IsEmpty]: Start isEmpty. Operand 2404 states and 3188 transitions. [2020-10-27 00:11:08,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2020-10-27 00:11:08,576 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:11:08,576 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-10-27 00:11:08,577 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 00:11:08,577 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:11:08,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:11:08,577 INFO L82 PathProgramCache]: Analyzing trace with hash 573948235, now seen corresponding path program 1 times [2020-10-27 00:11:08,578 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:11:08,578 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2069621388] [2020-10-27 00:11:08,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:11:08,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:11:08,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:11:08,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:11:09,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:11:11,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:11:13,657 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:11:13,657 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 221 [2020-10-27 00:11:13,657 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 00:11:13,657 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5019 [2020-10-27 00:11:13,657 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:11:13,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 00:11:13,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 00:11:13,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 212 [2020-10-27 00:11:13,658 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:11:13,801 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:11:13,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:11:13,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:11:13,824 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:11:13,824 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:11:13,824 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:11:13,825 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-27 00:11:13,825 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:11:13,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:11:13,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:11:13,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 00:11:13,825 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:11:13,849 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:11:13,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:11:13,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:11:14,071 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:11:14,071 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-27 00:11:14,071 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:11:14,072 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 200 [2020-10-27 00:11:14,072 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:11:14,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 00:11:14,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:11:14,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 88 [2020-10-27 00:11:14,072 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:11:14,143 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-27 00:11:14,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:11:14,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:11:14,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:11:14,375 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:11:14,375 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-27 00:11:14,376 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 00:11:14,376 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 205 [2020-10-27 00:11:14,376 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:11:14,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:11:14,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:11:14,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-27 00:11:14,377 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:11:14,524 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 6 proven. 70 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2020-10-27 00:11:14,524 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2069621388] [2020-10-27 00:11:14,525 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 00:11:14,525 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 00:11:14,525 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309776359] [2020-10-27 00:11:14,526 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 00:11:14,526 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:11:14,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 00:11:14,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-27 00:11:14,527 INFO L87 Difference]: Start difference. First operand 2404 states and 3188 transitions. Second operand 8 states. [2020-10-27 00:11:37,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:11:37,982 INFO L93 Difference]: Finished difference Result 9534 states and 13093 transitions. [2020-10-27 00:11:37,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 00:11:37,986 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 207 [2020-10-27 00:11:37,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:11:38,025 INFO L225 Difference]: With dead ends: 9534 [2020-10-27 00:11:38,025 INFO L226 Difference]: Without dead ends: 6210 [2020-10-27 00:11:38,036 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2020-10-27 00:11:38,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6210 states. [2020-10-27 00:11:38,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6210 to 6139. [2020-10-27 00:11:38,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6139 states. [2020-10-27 00:11:38,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6139 states to 6139 states and 8093 transitions. [2020-10-27 00:11:38,212 INFO L78 Accepts]: Start accepts. Automaton has 6139 states and 8093 transitions. Word has length 207 [2020-10-27 00:11:38,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:11:38,212 INFO L481 AbstractCegarLoop]: Abstraction has 6139 states and 8093 transitions. [2020-10-27 00:11:38,212 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 00:11:38,213 INFO L276 IsEmpty]: Start isEmpty. Operand 6139 states and 8093 transitions. [2020-10-27 00:11:38,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2020-10-27 00:11:38,215 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:11:38,216 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-10-27 00:11:38,216 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 00:11:38,216 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:11:38,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:11:38,217 INFO L82 PathProgramCache]: Analyzing trace with hash -1496622443, now seen corresponding path program 1 times [2020-10-27 00:11:38,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:11:38,217 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1628379660] [2020-10-27 00:11:38,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:11:38,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:11:38,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:11:38,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:11:38,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:11:43,299 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:11:43,299 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 232 [2020-10-27 00:11:43,299 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 00:11:43,300 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5025 [2020-10-27 00:11:43,300 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:11:43,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 00:11:43,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 97 [2020-10-27 00:11:43,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 131 [2020-10-27 00:11:43,300 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:11:43,460 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:11:43,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:11:43,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:11:43,468 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:11:43,468 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:11:43,469 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:11:43,469 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 00:11:43,469 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:11:43,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 00:11:43,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:11:43,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 00:11:43,470 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:11:43,495 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:11:43,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:11:43,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:11:43,648 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:11:43,648 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-27 00:11:43,649 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:11:43,649 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 133 [2020-10-27 00:11:43,649 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:11:43,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:11:43,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:11:43,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-27 00:11:43,649 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:11:43,694 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-27 00:11:43,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:11:43,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:11:43,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:11:43,924 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:11:43,924 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-27 00:11:43,924 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 00:11:43,924 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 209 [2020-10-27 00:11:43,925 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:11:43,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:11:43,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:11:43,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 87 [2020-10-27 00:11:43,925 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:11:44,038 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 118 proven. 37 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-27 00:11:44,039 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1628379660] [2020-10-27 00:11:44,040 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 00:11:44,040 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 00:11:44,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202865835] [2020-10-27 00:11:44,041 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 00:11:44,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:11:44,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 00:11:44,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-27 00:11:44,043 INFO L87 Difference]: Start difference. First operand 6139 states and 8093 transitions. Second operand 7 states. [2020-10-27 00:11:55,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:11:55,865 INFO L93 Difference]: Finished difference Result 12412 states and 16466 transitions. [2020-10-27 00:11:55,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 00:11:55,868 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 218 [2020-10-27 00:11:55,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:11:55,900 INFO L225 Difference]: With dead ends: 12412 [2020-10-27 00:11:55,900 INFO L226 Difference]: Without dead ends: 6279 [2020-10-27 00:11:55,917 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-10-27 00:11:55,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6279 states. [2020-10-27 00:11:56,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6279 to 6183. [2020-10-27 00:11:56,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6183 states. [2020-10-27 00:11:56,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6183 states to 6183 states and 8143 transitions. [2020-10-27 00:11:56,092 INFO L78 Accepts]: Start accepts. Automaton has 6183 states and 8143 transitions. Word has length 218 [2020-10-27 00:11:56,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:11:56,093 INFO L481 AbstractCegarLoop]: Abstraction has 6183 states and 8143 transitions. [2020-10-27 00:11:56,093 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 00:11:56,093 INFO L276 IsEmpty]: Start isEmpty. Operand 6183 states and 8143 transitions. [2020-10-27 00:11:56,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 294 [2020-10-27 00:11:56,099 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:11:56,100 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 00:11:56,100 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 00:11:56,100 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:11:56,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:11:56,101 INFO L82 PathProgramCache]: Analyzing trace with hash -402651240, now seen corresponding path program 1 times [2020-10-27 00:11:56,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:11:56,101 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1180389047] [2020-10-27 00:11:56,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:11:56,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:11:56,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:11:56,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:11:57,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:11:58,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:12:00,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:12:00,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:12:01,188 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:12:01,188 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 309 [2020-10-27 00:12:01,189 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 00:12:01,189 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-27 00:12:01,189 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:12:01,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 00:12:01,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 00:12:01,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 300 [2020-10-27 00:12:01,189 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:12:01,364 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:12:01,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:12:01,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:12:01,389 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:12:01,390 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:12:01,390 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:12:01,390 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-27 00:12:01,391 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:12:01,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:12:01,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:12:01,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 00:12:01,392 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 00:12:01,427 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:12:01,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:12:01,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:12:01,702 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:12:01,703 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-27 00:12:01,703 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:12:01,703 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 244 [2020-10-27 00:12:01,704 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:12:01,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 00:12:01,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:12:01,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 88 [2020-10-27 00:12:01,705 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 00:12:01,818 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-27 00:12:01,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:12:01,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:12:02,034 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:12:02,034 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-27 00:12:02,034 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:12:02,034 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 190 [2020-10-27 00:12:02,035 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:12:02,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:12:02,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:12:02,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 87 [2020-10-27 00:12:02,035 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:12:02,097 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 181 [2020-10-27 00:12:02,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:12:02,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:12:02,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:12:02,449 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:12:02,449 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-27 00:12:02,449 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 00:12:02,450 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 335 [2020-10-27 00:12:02,450 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:12:02,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:12:02,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:12:02,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-27 00:12:02,453 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 00:12:02,669 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 79 proven. 185 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2020-10-27 00:12:02,670 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1180389047] [2020-10-27 00:12:02,670 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 00:12:02,670 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 00:12:02,671 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765731487] [2020-10-27 00:12:02,671 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 00:12:02,672 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:12:02,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 00:12:02,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-10-27 00:12:02,673 INFO L87 Difference]: Start difference. First operand 6183 states and 8143 transitions. Second operand 9 states. [2020-10-27 00:12:28,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:12:28,166 INFO L93 Difference]: Finished difference Result 19315 states and 27146 transitions. [2020-10-27 00:12:28,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 00:12:28,168 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 293 [2020-10-27 00:12:28,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:12:28,227 INFO L225 Difference]: With dead ends: 19315 [2020-10-27 00:12:28,227 INFO L226 Difference]: Without dead ends: 11336 [2020-10-27 00:12:28,255 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2020-10-27 00:12:28,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11336 states. [2020-10-27 00:12:28,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11336 to 9780. [2020-10-27 00:12:28,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9780 states. [2020-10-27 00:12:28,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9780 states to 9780 states and 12875 transitions. [2020-10-27 00:12:28,597 INFO L78 Accepts]: Start accepts. Automaton has 9780 states and 12875 transitions. Word has length 293 [2020-10-27 00:12:28,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:12:28,597 INFO L481 AbstractCegarLoop]: Abstraction has 9780 states and 12875 transitions. [2020-10-27 00:12:28,598 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 00:12:28,598 INFO L276 IsEmpty]: Start isEmpty. Operand 9780 states and 12875 transitions. [2020-10-27 00:12:28,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 315 [2020-10-27 00:12:28,605 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:12:28,605 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:12:28,605 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 00:12:28,606 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:12:28,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:12:28,606 INFO L82 PathProgramCache]: Analyzing trace with hash -611690405, now seen corresponding path program 1 times [2020-10-27 00:12:28,606 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:12:28,607 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1212769623] [2020-10-27 00:12:28,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:12:28,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:12:28,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:12:28,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:12:29,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:12:30,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:12:32,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:12:33,699 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:12:33,700 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 330 [2020-10-27 00:12:33,700 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 00:12:33,700 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5018 [2020-10-27 00:12:33,700 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:12:33,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:12:33,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 97 [2020-10-27 00:12:33,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 110 [2020-10-27 00:12:33,701 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:12:33,871 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:12:33,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:12:33,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:12:33,880 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:12:33,881 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:12:33,881 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:12:33,881 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 00:12:33,881 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:12:33,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 00:12:33,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:12:33,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 00:12:33,882 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:12:33,915 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:12:33,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:12:33,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:12:34,040 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:12:34,041 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-27 00:12:34,041 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:12:34,041 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 98 [2020-10-27 00:12:34,041 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:12:34,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:12:34,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:12:34,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-27 00:12:34,042 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:12:34,077 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-27 00:12:34,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:12:34,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:12:34,381 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:12:34,381 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 108 [2020-10-27 00:12:34,381 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:12:34,382 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 277 [2020-10-27 00:12:34,382 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:12:34,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:12:34,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:12:34,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 108 [2020-10-27 00:12:34,382 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:12:34,466 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 202 [2020-10-27 00:12:34,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:12:34,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:12:34,525 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:12:34,526 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-27 00:12:34,526 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:12:34,526 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 42 [2020-10-27 00:12:34,526 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:12:34,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 00:12:34,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 73 [2020-10-27 00:12:34,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 00:12:34,527 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:12:34,662 INFO L134 CoverageAnalysis]: Checked inductivity of 348 backedges. 199 proven. 74 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2020-10-27 00:12:34,662 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1212769623] [2020-10-27 00:12:34,662 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 00:12:34,663 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 00:12:34,663 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407660428] [2020-10-27 00:12:34,664 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 00:12:34,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:12:34,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 00:12:34,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 00:12:34,665 INFO L87 Difference]: Start difference. First operand 9780 states and 12875 transitions. Second operand 7 states. [2020-10-27 00:12:40,288 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-10-27 00:12:55,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:12:55,298 INFO L93 Difference]: Finished difference Result 28437 states and 38833 transitions. [2020-10-27 00:12:55,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 00:12:55,300 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 314 [2020-10-27 00:12:55,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:12:55,372 INFO L225 Difference]: With dead ends: 28437 [2020-10-27 00:12:55,373 INFO L226 Difference]: Without dead ends: 17756 [2020-10-27 00:12:55,409 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-27 00:12:55,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17756 states. [2020-10-27 00:12:55,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17756 to 14041. [2020-10-27 00:12:55,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14041 states. [2020-10-27 00:12:55,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14041 states to 14041 states and 18345 transitions. [2020-10-27 00:12:55,836 INFO L78 Accepts]: Start accepts. Automaton has 14041 states and 18345 transitions. Word has length 314 [2020-10-27 00:12:55,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:12:55,837 INFO L481 AbstractCegarLoop]: Abstraction has 14041 states and 18345 transitions. [2020-10-27 00:12:55,837 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 00:12:55,837 INFO L276 IsEmpty]: Start isEmpty. Operand 14041 states and 18345 transitions. [2020-10-27 00:12:55,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 317 [2020-10-27 00:12:55,845 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:12:55,846 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:12:55,846 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 00:12:55,846 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:12:55,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:12:55,847 INFO L82 PathProgramCache]: Analyzing trace with hash -758849513, now seen corresponding path program 1 times [2020-10-27 00:12:55,847 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:12:55,848 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1253959493] [2020-10-27 00:12:55,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:12:55,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:12:55,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:12:56,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:12:56,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:12:58,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:12:59,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:13:00,993 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:13:00,994 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 332 [2020-10-27 00:13:00,994 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 00:13:00,994 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5065 [2020-10-27 00:13:00,994 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:13:00,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:13:00,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 97 [2020-10-27 00:13:00,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 112 [2020-10-27 00:13:00,995 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:13:01,134 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:13:01,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:13:01,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:13:01,142 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:13:01,142 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:13:01,143 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:13:01,143 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 00:13:01,143 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:13:01,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 00:13:01,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:13:01,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 00:13:01,144 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:13:01,176 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:13:01,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:13:01,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:13:01,267 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:13:01,267 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-27 00:13:01,267 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:13:01,267 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 71 [2020-10-27 00:13:01,267 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:13:01,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:13:01,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:13:01,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-27 00:13:01,268 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:13:01,296 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-27 00:13:01,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:13:01,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:13:01,483 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:13:01,483 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 110 [2020-10-27 00:13:01,483 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:13:01,483 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 163 [2020-10-27 00:13:01,483 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:13:01,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:13:01,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:13:01,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 110 [2020-10-27 00:13:01,484 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:13:01,679 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 204 [2020-10-27 00:13:01,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:13:01,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:13:01,720 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:13:01,721 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-27 00:13:01,721 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:13:01,721 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 29 [2020-10-27 00:13:01,721 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:13:01,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 00:13:01,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 73 [2020-10-27 00:13:01,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 00:13:01,721 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:13:01,955 INFO L134 CoverageAnalysis]: Checked inductivity of 348 backedges. 199 proven. 74 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2020-10-27 00:13:01,956 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1253959493] [2020-10-27 00:13:01,956 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 00:13:01,956 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 00:13:01,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17229403] [2020-10-27 00:13:01,957 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 00:13:01,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:13:01,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 00:13:01,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-27 00:13:01,958 INFO L87 Difference]: Start difference. First operand 14041 states and 18345 transitions. Second operand 7 states. [2020-10-27 00:13:10,734 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2020-10-27 00:13:20,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:13:20,379 INFO L93 Difference]: Finished difference Result 30907 states and 40371 transitions. [2020-10-27 00:13:20,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 00:13:20,382 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 316 [2020-10-27 00:13:20,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:13:20,449 INFO L225 Difference]: With dead ends: 30907 [2020-10-27 00:13:20,449 INFO L226 Difference]: Without dead ends: 16872 [2020-10-27 00:13:20,486 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-27 00:13:20,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16872 states. [2020-10-27 00:13:20,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16872 to 16743. [2020-10-27 00:13:20,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16743 states. [2020-10-27 00:13:20,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16743 states to 16743 states and 21141 transitions. [2020-10-27 00:13:20,907 INFO L78 Accepts]: Start accepts. Automaton has 16743 states and 21141 transitions. Word has length 316 [2020-10-27 00:13:20,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:13:20,908 INFO L481 AbstractCegarLoop]: Abstraction has 16743 states and 21141 transitions. [2020-10-27 00:13:20,908 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 00:13:20,909 INFO L276 IsEmpty]: Start isEmpty. Operand 16743 states and 21141 transitions. [2020-10-27 00:13:20,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 337 [2020-10-27 00:13:20,916 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:13:20,917 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:13:20,917 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 00:13:20,917 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:13:20,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:13:20,918 INFO L82 PathProgramCache]: Analyzing trace with hash 682857647, now seen corresponding path program 1 times [2020-10-27 00:13:20,919 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:13:20,919 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1087804222] [2020-10-27 00:13:20,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:13:21,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:13:21,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:13:21,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:13:21,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:13:26,026 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:13:26,026 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 352 [2020-10-27 00:13:26,027 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 00:13:26,027 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-27 00:13:26,027 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:13:26,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 00:13:26,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 00:13:26,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 224 [2020-10-27 00:13:26,027 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:13:26,230 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:13:26,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:13:26,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:13:26,245 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:13:26,245 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:13:26,245 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:13:26,245 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-27 00:13:26,246 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:13:26,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:13:26,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:13:26,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 00:13:26,246 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:13:26,292 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:13:26,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:13:26,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:13:26,496 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:13:26,496 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-27 00:13:26,496 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:13:26,497 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 181 [2020-10-27 00:13:26,497 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:13:26,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 00:13:26,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:13:26,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 88 [2020-10-27 00:13:26,498 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0