/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.3 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.3.ufo.UNBOUNDED.pals.c.v+sep-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-29 13:14:39,111 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-29 13:14:39,114 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-29 13:14:39,156 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-29 13:14:39,157 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-29 13:14:39,158 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-29 13:14:39,160 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-29 13:14:39,163 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-29 13:14:39,165 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-29 13:14:39,166 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-29 13:14:39,168 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-29 13:14:39,169 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-29 13:14:39,170 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-29 13:14:39,171 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-29 13:14:39,172 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-29 13:14:39,174 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-29 13:14:39,175 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-29 13:14:39,176 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-29 13:14:39,178 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-29 13:14:39,181 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-29 13:14:39,183 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-29 13:14:39,184 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-29 13:14:39,186 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-29 13:14:39,187 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-29 13:14:39,190 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-29 13:14:39,191 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-29 13:14:39,191 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-29 13:14:39,194 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-29 13:14:39,195 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-29 13:14:39,196 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-29 13:14:39,197 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-29 13:14:39,201 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-29 13:14:39,202 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-29 13:14:39,203 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-29 13:14:39,204 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-29 13:14:39,204 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-29 13:14:39,205 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-29 13:14:39,206 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-29 13:14:39,206 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-29 13:14:39,207 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-29 13:14:39,208 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-29 13:14:39,209 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-29 13:14:39,246 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-29 13:14:39,246 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-29 13:14:39,249 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-29 13:14:39,249 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-29 13:14:39,250 INFO L138 SettingsManager]: * Use SBE=true [2020-10-29 13:14:39,252 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-29 13:14:39,252 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-29 13:14:39,252 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-29 13:14:39,253 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-29 13:14:39,253 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-29 13:14:39,253 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-29 13:14:39,253 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-29 13:14:39,254 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-29 13:14:39,254 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-29 13:14:39,254 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-29 13:14:39,254 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-29 13:14:39,254 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-29 13:14:39,255 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-29 13:14:39,256 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-29 13:14:39,257 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-29 13:14:39,257 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-29 13:14:39,257 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 13:14:39,258 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-29 13:14:39,258 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-29 13:14:39,258 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-29 13:14:39,258 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-29 13:14:39,258 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-29 13:14:39,259 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-29 13:14:39,259 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-29 13:14:39,259 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true;unknown-allowed=true; [2020-10-29 13:14:39,765 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-29 13:14:39,815 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-29 13:14:39,820 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-29 13:14:39,822 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-29 13:14:39,823 INFO L275 PluginConnector]: CDTParser initialized [2020-10-29 13:14:39,824 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.3.ufo.UNBOUNDED.pals.c.v+sep-reducer.c [2020-10-29 13:14:39,910 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e6f387664/b373c5a300f441b99f58667d9768f965/FLAG7eaf18dcd [2020-10-29 13:14:40,762 INFO L306 CDTParser]: Found 1 translation units. [2020-10-29 13:14:40,762 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.3.ufo.UNBOUNDED.pals.c.v+sep-reducer.c [2020-10-29 13:14:40,791 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e6f387664/b373c5a300f441b99f58667d9768f965/FLAG7eaf18dcd [2020-10-29 13:14:40,989 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e6f387664/b373c5a300f441b99f58667d9768f965 [2020-10-29 13:14:40,992 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-29 13:14:41,001 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-29 13:14:41,004 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-29 13:14:41,004 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-29 13:14:41,008 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-29 13:14:41,009 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 01:14:40" (1/1) ... [2020-10-29 13:14:41,012 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2ba20cc2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:14:41, skipping insertion in model container [2020-10-29 13:14:41,013 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 01:14:40" (1/1) ... [2020-10-29 13:14:41,026 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-29 13:14:41,109 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-29 13:14:41,519 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 13:14:41,545 INFO L203 MainTranslator]: Completed pre-run [2020-10-29 13:14:41,696 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 13:14:41,721 INFO L208 MainTranslator]: Completed translation [2020-10-29 13:14:41,722 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:14:41 WrapperNode [2020-10-29 13:14:41,722 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-29 13:14:41,723 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-29 13:14:41,724 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-29 13:14:41,724 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-29 13:14:41,739 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:14:41" (1/1) ... [2020-10-29 13:14:41,739 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:14:41" (1/1) ... [2020-10-29 13:14:41,759 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:14:41" (1/1) ... [2020-10-29 13:14:41,760 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:14:41" (1/1) ... [2020-10-29 13:14:41,791 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:14:41" (1/1) ... [2020-10-29 13:14:41,823 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:14:41" (1/1) ... [2020-10-29 13:14:41,835 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:14:41" (1/1) ... [2020-10-29 13:14:41,851 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-29 13:14:41,855 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-29 13:14:41,855 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-29 13:14:41,855 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-29 13:14:41,856 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:14:41" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 13:14:41,962 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-29 13:14:41,963 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-29 13:14:41,963 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-29 13:14:41,964 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-29 13:14:41,964 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-29 13:14:41,965 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-29 13:14:41,965 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-29 13:14:41,965 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-29 13:14:41,965 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-29 13:14:41,966 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-29 13:14:41,967 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-29 13:14:41,967 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-10-29 13:14:41,967 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-29 13:14:41,967 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-29 13:14:41,968 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-29 13:14:41,969 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-29 13:14:41,970 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-29 13:14:41,970 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-29 13:14:41,970 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-29 13:14:41,970 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-29 13:14:41,970 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-29 13:14:41,971 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-29 13:14:41,971 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-29 13:14:41,971 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-29 13:14:41,971 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-29 13:14:41,971 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-29 13:14:41,971 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-29 13:14:41,972 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-29 13:14:43,470 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-29 13:14:43,470 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-29 13:14:43,472 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 01:14:43 BoogieIcfgContainer [2020-10-29 13:14:43,473 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-29 13:14:43,474 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-29 13:14:43,474 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-29 13:14:43,478 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-29 13:14:43,478 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.10 01:14:40" (1/3) ... [2020-10-29 13:14:43,479 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d19b72b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 01:14:43, skipping insertion in model container [2020-10-29 13:14:43,479 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:14:41" (2/3) ... [2020-10-29 13:14:43,480 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d19b72b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 01:14:43, skipping insertion in model container [2020-10-29 13:14:43,480 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 01:14:43" (3/3) ... [2020-10-29 13:14:43,482 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.3.ufo.UNBOUNDED.pals.c.v+sep-reducer.c [2020-10-29 13:14:43,494 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-29 13:14:43,499 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-29 13:14:43,513 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-29 13:14:43,544 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-29 13:14:43,544 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-29 13:14:43,544 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-29 13:14:43,545 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-29 13:14:43,545 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-29 13:14:43,545 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-29 13:14:43,545 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-29 13:14:43,545 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-29 13:14:43,570 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states. [2020-10-29 13:14:43,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-29 13:14:43,584 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:14:43,585 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:14:43,585 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:14:43,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:14:43,592 INFO L82 PathProgramCache]: Analyzing trace with hash -624284439, now seen corresponding path program 1 times [2020-10-29 13:14:43,602 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:14:43,602 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [767611883] [2020-10-29 13:14:43,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:14:43,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:14:44,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:44,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:45,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:45,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:45,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:46,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:46,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:47,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:47,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:48,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:48,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:48,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:48,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:48,965 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:14:48,966 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-29 13:14:48,966 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-29 13:14:48,966 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-29 13:14:48,970 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:14:48,970 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:14:48,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-29 13:14:48,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:14:48,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-29 13:14:48,971 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-29 13:14:49,470 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-29 13:14:49,473 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:14:49,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:14:49,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:49,518 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:14:49,518 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:14:49,519 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:14:49,519 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-29 13:14:49,519 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:14:49,519 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:14:49,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:14:49,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:14:49,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:14:49,520 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:14:49,554 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:14:49,554 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [767611883] [2020-10-29 13:14:49,557 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:14:49,557 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-29 13:14:49,558 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846351016] [2020-10-29 13:14:49,565 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-29 13:14:49,566 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:14:49,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-29 13:14:49,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-29 13:14:49,588 INFO L87 Difference]: Start difference. First operand 275 states. Second operand 9 states. [2020-10-29 13:14:49,917 WARN L193 SmtUtils]: Spent 245.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2020-10-29 13:14:52,251 WARN L193 SmtUtils]: Spent 261.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-29 13:14:52,725 WARN L193 SmtUtils]: Spent 319.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-29 13:14:53,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:14:53,256 INFO L93 Difference]: Finished difference Result 523 states and 875 transitions. [2020-10-29 13:14:53,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-29 13:14:53,258 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 52 [2020-10-29 13:14:53,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:14:53,276 INFO L225 Difference]: With dead ends: 523 [2020-10-29 13:14:53,276 INFO L226 Difference]: Without dead ends: 466 [2020-10-29 13:14:53,281 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2020-10-29 13:14:53,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 466 states. [2020-10-29 13:14:53,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 466 to 254. [2020-10-29 13:14:53,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 254 states. [2020-10-29 13:14:53,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 318 transitions. [2020-10-29 13:14:53,362 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 318 transitions. Word has length 52 [2020-10-29 13:14:53,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:14:53,363 INFO L481 AbstractCegarLoop]: Abstraction has 254 states and 318 transitions. [2020-10-29 13:14:53,363 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-29 13:14:53,363 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 318 transitions. [2020-10-29 13:14:53,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-29 13:14:53,367 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:14:53,368 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:14:53,368 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-29 13:14:53,368 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:14:53,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:14:53,369 INFO L82 PathProgramCache]: Analyzing trace with hash -58264428, now seen corresponding path program 1 times [2020-10-29 13:14:53,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:14:53,370 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [682202174] [2020-10-29 13:14:53,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:14:53,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:14:53,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:53,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:53,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:53,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:54,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:54,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:54,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:56,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:56,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:58,419 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:14:58,419 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-29 13:14:58,420 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-29 13:14:58,420 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-29 13:14:58,421 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:14:58,421 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:14:58,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:14:58,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 13:14:58,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-29 13:14:58,422 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:14:58,858 WARN L193 SmtUtils]: Spent 276.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-29 13:14:58,860 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:14:58,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:14:58,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:58,893 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:14:58,894 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:14:58,894 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:14:58,894 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-29 13:14:58,894 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:14:58,895 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:14:58,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:14:58,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:14:58,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 13:14:58,896 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:14:58,919 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:14:58,920 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [682202174] [2020-10-29 13:14:58,920 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:14:58,921 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 13:14:58,921 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502239692] [2020-10-29 13:14:58,923 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:14:58,924 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:14:58,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:14:58,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:14:58,926 INFO L87 Difference]: Start difference. First operand 254 states and 318 transitions. Second operand 6 states. [2020-10-29 13:14:59,217 WARN L193 SmtUtils]: Spent 245.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-29 13:15:00,253 WARN L193 SmtUtils]: Spent 271.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2020-10-29 13:15:00,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:15:00,536 INFO L93 Difference]: Finished difference Result 406 states and 525 transitions. [2020-10-29 13:15:00,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-29 13:15:00,537 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 52 [2020-10-29 13:15:00,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:15:00,545 INFO L225 Difference]: With dead ends: 406 [2020-10-29 13:15:00,545 INFO L226 Difference]: Without dead ends: 284 [2020-10-29 13:15:00,548 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-10-29 13:15:00,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2020-10-29 13:15:00,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 269. [2020-10-29 13:15:00,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 269 states. [2020-10-29 13:15:00,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 352 transitions. [2020-10-29 13:15:00,624 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 352 transitions. Word has length 52 [2020-10-29 13:15:00,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:15:00,625 INFO L481 AbstractCegarLoop]: Abstraction has 269 states and 352 transitions. [2020-10-29 13:15:00,625 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:15:00,625 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 352 transitions. [2020-10-29 13:15:00,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-29 13:15:00,635 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:15:00,635 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:15:00,636 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-29 13:15:00,636 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:15:00,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:15:00,637 INFO L82 PathProgramCache]: Analyzing trace with hash -2118713766, now seen corresponding path program 1 times [2020-10-29 13:15:00,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:15:00,639 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [981274777] [2020-10-29 13:15:00,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:15:00,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:15:00,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:00,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:00,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:01,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:01,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:01,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:01,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:01,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:02,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:02,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:02,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:03,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:03,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:03,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:05,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:05,673 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:15:05,673 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-29 13:15:05,673 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-29 13:15:05,674 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-29 13:15:05,674 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:15:05,675 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:15:05,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:15:05,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-29 13:15:05,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-29 13:15:05,675 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:15:05,955 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-29 13:15:05,959 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:15:05,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:15:05,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:05,975 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:15:05,975 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:15:05,975 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:15:05,975 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-29 13:15:05,975 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:15:05,976 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:15:05,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:15:05,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:15:05,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:15:05,976 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:15:05,989 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:15:05,990 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [981274777] [2020-10-29 13:15:05,990 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:15:05,990 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 13:15:05,990 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375785876] [2020-10-29 13:15:05,991 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:15:05,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:15:05,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:15:05,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:15:05,992 INFO L87 Difference]: Start difference. First operand 269 states and 352 transitions. Second operand 6 states. [2020-10-29 13:15:06,265 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-29 13:15:07,399 WARN L193 SmtUtils]: Spent 244.00 ms on a formula simplification that was a NOOP. DAG size: 165 [2020-10-29 13:15:07,744 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-29 13:15:08,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:15:08,220 INFO L93 Difference]: Finished difference Result 689 states and 965 transitions. [2020-10-29 13:15:08,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-29 13:15:08,222 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 52 [2020-10-29 13:15:08,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:15:08,226 INFO L225 Difference]: With dead ends: 689 [2020-10-29 13:15:08,226 INFO L226 Difference]: Without dead ends: 599 [2020-10-29 13:15:08,228 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-29 13:15:08,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 599 states. [2020-10-29 13:15:08,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 599 to 552. [2020-10-29 13:15:08,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 552 states. [2020-10-29 13:15:08,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 552 states to 552 states and 781 transitions. [2020-10-29 13:15:08,299 INFO L78 Accepts]: Start accepts. Automaton has 552 states and 781 transitions. Word has length 52 [2020-10-29 13:15:08,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:15:08,302 INFO L481 AbstractCegarLoop]: Abstraction has 552 states and 781 transitions. [2020-10-29 13:15:08,302 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:15:08,302 INFO L276 IsEmpty]: Start isEmpty. Operand 552 states and 781 transitions. [2020-10-29 13:15:08,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-29 13:15:08,310 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:15:08,310 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:15:08,310 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-29 13:15:08,310 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:15:08,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:15:08,311 INFO L82 PathProgramCache]: Analyzing trace with hash 936770437, now seen corresponding path program 1 times [2020-10-29 13:15:08,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:15:08,312 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1648502356] [2020-10-29 13:15:08,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:15:08,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:15:08,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:08,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:08,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:08,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:08,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:08,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:09,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:09,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:10,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:10,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:11,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:11,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:12,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:12,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:13,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:13,361 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:15:13,361 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-29 13:15:13,361 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-29 13:15:13,361 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-29 13:15:13,362 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:15:13,362 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:15:13,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 13:15:13,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:15:13,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-29 13:15:13,362 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:15:13,702 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-29 13:15:13,703 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:15:13,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:15:13,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:13,723 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:15:13,723 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:15:13,723 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:15:13,724 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-29 13:15:13,724 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:15:13,724 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:15:13,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:15:13,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:15:13,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:15:13,725 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:15:13,743 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:15:13,743 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1648502356] [2020-10-29 13:15:13,743 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:15:13,744 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-29 13:15:13,744 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525861284] [2020-10-29 13:15:13,744 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 13:15:13,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:15:13,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 13:15:13,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-29 13:15:13,745 INFO L87 Difference]: Start difference. First operand 552 states and 781 transitions. Second operand 8 states. [2020-10-29 13:15:14,054 WARN L193 SmtUtils]: Spent 260.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2020-10-29 13:15:15,142 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-29 13:15:15,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:15:15,767 INFO L93 Difference]: Finished difference Result 1581 states and 2379 transitions. [2020-10-29 13:15:15,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-29 13:15:15,767 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 52 [2020-10-29 13:15:15,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:15:15,777 INFO L225 Difference]: With dead ends: 1581 [2020-10-29 13:15:15,777 INFO L226 Difference]: Without dead ends: 1239 [2020-10-29 13:15:15,785 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2020-10-29 13:15:15,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1239 states. [2020-10-29 13:15:15,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1239 to 550. [2020-10-29 13:15:15,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 550 states. [2020-10-29 13:15:15,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 550 states to 550 states and 778 transitions. [2020-10-29 13:15:15,862 INFO L78 Accepts]: Start accepts. Automaton has 550 states and 778 transitions. Word has length 52 [2020-10-29 13:15:15,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:15:15,863 INFO L481 AbstractCegarLoop]: Abstraction has 550 states and 778 transitions. [2020-10-29 13:15:15,863 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 13:15:15,863 INFO L276 IsEmpty]: Start isEmpty. Operand 550 states and 778 transitions. [2020-10-29 13:15:15,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-29 13:15:15,865 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:15:15,866 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:15:15,866 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-29 13:15:15,866 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:15:15,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:15:15,867 INFO L82 PathProgramCache]: Analyzing trace with hash 1183796705, now seen corresponding path program 1 times [2020-10-29 13:15:15,867 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:15:15,867 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [525411679] [2020-10-29 13:15:15,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:15:15,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:15:15,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:15,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:16,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:16,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:16,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:16,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:17,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:17,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:17,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:20,906 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:15:20,906 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-29 13:15:20,906 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-29 13:15:20,906 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-29 13:15:20,907 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:15:20,907 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:15:20,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:15:20,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-29 13:15:20,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-29 13:15:20,909 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-29 13:15:21,196 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-29 13:15:21,197 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:15:21,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:15:21,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:21,212 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:15:21,213 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:15:21,213 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:15:21,213 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-29 13:15:21,213 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:15:21,213 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:15:21,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:15:21,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:15:21,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:15:21,214 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:15:21,226 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:15:21,227 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [525411679] [2020-10-29 13:15:21,227 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:15:21,227 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 13:15:21,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323419215] [2020-10-29 13:15:21,228 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:15:21,228 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:15:21,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:15:21,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:15:21,229 INFO L87 Difference]: Start difference. First operand 550 states and 778 transitions. Second operand 6 states. [2020-10-29 13:15:21,506 WARN L193 SmtUtils]: Spent 239.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-29 13:15:22,682 WARN L193 SmtUtils]: Spent 251.00 ms on a formula simplification that was a NOOP. DAG size: 165 [2020-10-29 13:15:22,992 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-29 13:15:23,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:15:23,635 INFO L93 Difference]: Finished difference Result 2340 states and 3505 transitions. [2020-10-29 13:15:23,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-29 13:15:23,635 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 52 [2020-10-29 13:15:23,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:15:23,647 INFO L225 Difference]: With dead ends: 2340 [2020-10-29 13:15:23,647 INFO L226 Difference]: Without dead ends: 2004 [2020-10-29 13:15:23,649 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-29 13:15:23,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2004 states. [2020-10-29 13:15:23,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2004 to 1642. [2020-10-29 13:15:23,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1642 states. [2020-10-29 13:15:23,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1642 states to 1642 states and 2434 transitions. [2020-10-29 13:15:23,803 INFO L78 Accepts]: Start accepts. Automaton has 1642 states and 2434 transitions. Word has length 52 [2020-10-29 13:15:23,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:15:23,804 INFO L481 AbstractCegarLoop]: Abstraction has 1642 states and 2434 transitions. [2020-10-29 13:15:23,804 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:15:23,804 INFO L276 IsEmpty]: Start isEmpty. Operand 1642 states and 2434 transitions. [2020-10-29 13:15:23,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-29 13:15:23,806 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:15:23,806 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:15:23,806 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-29 13:15:23,806 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:15:23,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:15:23,807 INFO L82 PathProgramCache]: Analyzing trace with hash 914400266, now seen corresponding path program 1 times [2020-10-29 13:15:23,807 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:15:23,807 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [137906846] [2020-10-29 13:15:23,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:15:23,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:15:23,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:23,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:24,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:24,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:24,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:24,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:24,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:24,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:25,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:25,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:25,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:25,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:25,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:26,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:26,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:27,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:28,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:28,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:28,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:28,834 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:15:28,835 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-29 13:15:28,835 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 19 [2020-10-29 13:15:28,835 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-29 13:15:28,835 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:15:28,835 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:15:28,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 13:15:28,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:15:28,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-29 13:15:28,836 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:15:29,384 WARN L193 SmtUtils]: Spent 296.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-29 13:15:29,385 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:15:29,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:15:29,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:29,402 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:15:29,402 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:15:29,403 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:15:29,403 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-29 13:15:29,403 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:15:29,404 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:15:29,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:15:29,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:15:29,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:15:29,404 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:15:29,428 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:15:29,429 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [137906846] [2020-10-29 13:15:29,430 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:15:29,431 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-29 13:15:29,431 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865326967] [2020-10-29 13:15:29,431 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 13:15:29,432 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:15:29,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 13:15:29,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-29 13:15:29,433 INFO L87 Difference]: Start difference. First operand 1642 states and 2434 transitions. Second operand 8 states. [2020-10-29 13:15:30,265 WARN L193 SmtUtils]: Spent 718.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 185 [2020-10-29 13:15:31,983 WARN L193 SmtUtils]: Spent 609.00 ms on a formula simplification. DAG size of input: 193 DAG size of output: 190 [2020-10-29 13:15:32,969 WARN L193 SmtUtils]: Spent 239.00 ms on a formula simplification that was a NOOP. DAG size: 174 [2020-10-29 13:15:33,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:15:33,206 INFO L93 Difference]: Finished difference Result 5029 states and 7739 transitions. [2020-10-29 13:15:33,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-29 13:15:33,207 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 53 [2020-10-29 13:15:33,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:15:33,231 INFO L225 Difference]: With dead ends: 5029 [2020-10-29 13:15:33,231 INFO L226 Difference]: Without dead ends: 3708 [2020-10-29 13:15:33,237 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2020-10-29 13:15:33,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3708 states. [2020-10-29 13:15:33,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3708 to 1610. [2020-10-29 13:15:33,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1610 states. [2020-10-29 13:15:33,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1610 states to 1610 states and 2387 transitions. [2020-10-29 13:15:33,474 INFO L78 Accepts]: Start accepts. Automaton has 1610 states and 2387 transitions. Word has length 53 [2020-10-29 13:15:33,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:15:33,474 INFO L481 AbstractCegarLoop]: Abstraction has 1610 states and 2387 transitions. [2020-10-29 13:15:33,475 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 13:15:33,475 INFO L276 IsEmpty]: Start isEmpty. Operand 1610 states and 2387 transitions. [2020-10-29 13:15:33,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-29 13:15:33,476 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:15:33,476 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:15:33,476 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-29 13:15:33,477 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:15:33,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:15:33,477 INFO L82 PathProgramCache]: Analyzing trace with hash 1886222156, now seen corresponding path program 1 times [2020-10-29 13:15:33,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:15:33,478 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1454613936] [2020-10-29 13:15:33,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:15:33,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:15:33,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:33,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:33,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:33,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:34,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:34,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:34,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:34,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:34,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:34,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:34,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:35,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:35,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:36,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:38,503 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:15:38,503 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-29 13:15:38,503 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-29 13:15:38,503 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-29 13:15:38,504 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:15:38,504 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:15:38,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 13:15:38,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:15:38,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-29 13:15:38,504 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:15:38,960 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-29 13:15:38,961 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:15:38,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:15:38,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:38,978 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:15:38,979 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:15:38,979 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:15:38,979 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-29 13:15:38,979 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:15:38,979 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:15:38,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:15:38,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:15:38,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:15:38,980 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:15:39,003 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:15:39,004 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1454613936] [2020-10-29 13:15:39,004 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:15:39,004 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-29 13:15:39,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667723245] [2020-10-29 13:15:39,005 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 13:15:39,006 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:15:39,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 13:15:39,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-10-29 13:15:39,007 INFO L87 Difference]: Start difference. First operand 1610 states and 2387 transitions. Second operand 8 states. [2020-10-29 13:15:39,347 WARN L193 SmtUtils]: Spent 286.00 ms on a formula simplification that was a NOOP. DAG size: 182 [2020-10-29 13:15:40,333 WARN L193 SmtUtils]: Spent 288.00 ms on a formula simplification that was a NOOP. DAG size: 180 [2020-10-29 13:15:41,266 WARN L193 SmtUtils]: Spent 274.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2020-10-29 13:15:41,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:15:41,477 INFO L93 Difference]: Finished difference Result 3223 states and 4906 transitions. [2020-10-29 13:15:41,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-29 13:15:41,478 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 53 [2020-10-29 13:15:41,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:15:41,495 INFO L225 Difference]: With dead ends: 3223 [2020-10-29 13:15:41,496 INFO L226 Difference]: Without dead ends: 3207 [2020-10-29 13:15:41,498 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2020-10-29 13:15:41,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3207 states. [2020-10-29 13:15:41,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3207 to 1596. [2020-10-29 13:15:41,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1596 states. [2020-10-29 13:15:41,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1596 states to 1596 states and 2370 transitions. [2020-10-29 13:15:41,733 INFO L78 Accepts]: Start accepts. Automaton has 1596 states and 2370 transitions. Word has length 53 [2020-10-29 13:15:41,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:15:41,735 INFO L481 AbstractCegarLoop]: Abstraction has 1596 states and 2370 transitions. [2020-10-29 13:15:41,735 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 13:15:41,735 INFO L276 IsEmpty]: Start isEmpty. Operand 1596 states and 2370 transitions. [2020-10-29 13:15:41,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-29 13:15:41,736 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:15:41,737 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:15:41,737 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-29 13:15:41,737 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:15:41,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:15:41,737 INFO L82 PathProgramCache]: Analyzing trace with hash 1165674538, now seen corresponding path program 1 times [2020-10-29 13:15:41,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:15:41,738 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1261769094] [2020-10-29 13:15:41,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:15:41,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:15:41,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:41,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:41,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:42,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:42,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:42,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:42,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:42,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:43,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:43,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:46,767 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:15:46,768 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-29 13:15:46,768 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-29 13:15:46,768 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-29 13:15:46,768 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:15:46,768 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:15:46,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-29 13:15:46,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:15:46,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-29 13:15:46,769 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:15:47,080 WARN L193 SmtUtils]: Spent 237.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-29 13:15:47,081 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:15:47,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:15:47,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:47,098 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:15:47,098 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:15:47,098 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:15:47,098 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-29 13:15:47,099 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:15:47,099 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:15:47,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:15:47,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:15:47,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:15:47,099 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:15:47,113 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:15:47,113 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1261769094] [2020-10-29 13:15:47,113 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:15:47,113 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-29 13:15:47,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084039709] [2020-10-29 13:15:47,114 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 13:15:47,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:15:47,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 13:15:47,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-29 13:15:47,115 INFO L87 Difference]: Start difference. First operand 1596 states and 2370 transitions. Second operand 7 states. [2020-10-29 13:15:47,416 WARN L193 SmtUtils]: Spent 237.00 ms on a formula simplification that was a NOOP. DAG size: 173 [2020-10-29 13:15:48,336 WARN L193 SmtUtils]: Spent 265.00 ms on a formula simplification that was a NOOP. DAG size: 171 [2020-10-29 13:15:49,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:15:49,155 INFO L93 Difference]: Finished difference Result 3879 states and 5922 transitions. [2020-10-29 13:15:49,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-29 13:15:49,156 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 53 [2020-10-29 13:15:49,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:15:49,172 INFO L225 Difference]: With dead ends: 3879 [2020-10-29 13:15:49,173 INFO L226 Difference]: Without dead ends: 3207 [2020-10-29 13:15:49,176 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2020-10-29 13:15:49,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3207 states. [2020-10-29 13:15:49,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3207 to 1596. [2020-10-29 13:15:49,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1596 states. [2020-10-29 13:15:49,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1596 states to 1596 states and 2369 transitions. [2020-10-29 13:15:49,414 INFO L78 Accepts]: Start accepts. Automaton has 1596 states and 2369 transitions. Word has length 53 [2020-10-29 13:15:49,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:15:49,415 INFO L481 AbstractCegarLoop]: Abstraction has 1596 states and 2369 transitions. [2020-10-29 13:15:49,415 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 13:15:49,415 INFO L276 IsEmpty]: Start isEmpty. Operand 1596 states and 2369 transitions. [2020-10-29 13:15:49,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-29 13:15:49,416 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:15:49,416 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:15:49,417 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-29 13:15:49,417 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:15:49,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:15:49,417 INFO L82 PathProgramCache]: Analyzing trace with hash 350207193, now seen corresponding path program 1 times [2020-10-29 13:15:49,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:15:49,418 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [352163084] [2020-10-29 13:15:49,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:15:49,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:15:49,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:49,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:49,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:49,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:49,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:49,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:49,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:50,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:50,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:50,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:50,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:50,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:51,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:51,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:54,441 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:15:54,442 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-29 13:15:54,442 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-29 13:15:54,442 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-29 13:15:54,442 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:15:54,442 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:15:54,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-29 13:15:54,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:15:54,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-29 13:15:54,443 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:15:54,754 WARN L193 SmtUtils]: Spent 238.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-29 13:15:54,755 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:15:54,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:15:54,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:54,767 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:15:54,768 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:15:54,768 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:15:54,768 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-29 13:15:54,768 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:15:54,768 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:15:54,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:15:54,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:15:54,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:15:54,769 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:15:54,781 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:15:54,782 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [352163084] [2020-10-29 13:15:54,782 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:15:54,782 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-29 13:15:54,782 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715970851] [2020-10-29 13:15:54,783 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 13:15:54,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:15:54,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 13:15:54,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-29 13:15:54,784 INFO L87 Difference]: Start difference. First operand 1596 states and 2369 transitions. Second operand 7 states. [2020-10-29 13:15:55,110 WARN L193 SmtUtils]: Spent 269.00 ms on a formula simplification that was a NOOP. DAG size: 173 [2020-10-29 13:15:56,069 WARN L193 SmtUtils]: Spent 264.00 ms on a formula simplification that was a NOOP. DAG size: 171 [2020-10-29 13:15:56,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:15:56,979 INFO L93 Difference]: Finished difference Result 3878 states and 5920 transitions. [2020-10-29 13:15:56,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-29 13:15:56,980 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 53 [2020-10-29 13:15:56,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:15:56,995 INFO L225 Difference]: With dead ends: 3878 [2020-10-29 13:15:56,995 INFO L226 Difference]: Without dead ends: 3212 [2020-10-29 13:15:56,999 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2020-10-29 13:15:57,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3212 states. [2020-10-29 13:15:57,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3212 to 1596. [2020-10-29 13:15:57,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1596 states. [2020-10-29 13:15:57,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1596 states to 1596 states and 2368 transitions. [2020-10-29 13:15:57,241 INFO L78 Accepts]: Start accepts. Automaton has 1596 states and 2368 transitions. Word has length 53 [2020-10-29 13:15:57,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:15:57,242 INFO L481 AbstractCegarLoop]: Abstraction has 1596 states and 2368 transitions. [2020-10-29 13:15:57,242 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 13:15:57,242 INFO L276 IsEmpty]: Start isEmpty. Operand 1596 states and 2368 transitions. [2020-10-29 13:15:57,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-29 13:15:57,243 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:15:57,243 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:15:57,243 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-29 13:15:57,244 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:15:57,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:15:57,244 INFO L82 PathProgramCache]: Analyzing trace with hash 708226818, now seen corresponding path program 1 times [2020-10-29 13:15:57,244 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:15:57,244 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [857688326] [2020-10-29 13:15:57,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:15:57,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:15:57,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:57,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:57,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:57,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:57,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:58,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:58,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:58,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:58,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:59,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:59,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:59,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:59,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:02,270 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:16:02,270 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-29 13:16:02,270 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-29 13:16:02,270 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-29 13:16:02,270 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:16:02,270 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:16:02,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-29 13:16:02,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:16:02,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-29 13:16:02,271 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:16:02,604 WARN L193 SmtUtils]: Spent 234.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-29 13:16:02,606 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:16:02,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:16:02,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:02,622 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:16:02,622 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:16:02,622 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:16:02,622 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-29 13:16:02,623 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:16:02,623 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:16:02,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:16:02,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:16:02,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:16:02,623 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:16:02,637 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:16:02,637 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [857688326] [2020-10-29 13:16:02,638 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:16:02,638 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-29 13:16:02,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960595307] [2020-10-29 13:16:02,638 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 13:16:02,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:16:02,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 13:16:02,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-29 13:16:02,639 INFO L87 Difference]: Start difference. First operand 1596 states and 2368 transitions. Second operand 7 states. [2020-10-29 13:16:02,965 WARN L193 SmtUtils]: Spent 260.00 ms on a formula simplification that was a NOOP. DAG size: 173 [2020-10-29 13:16:03,948 WARN L193 SmtUtils]: Spent 259.00 ms on a formula simplification that was a NOOP. DAG size: 171 [2020-10-29 13:16:04,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:16:04,822 INFO L93 Difference]: Finished difference Result 5027 states and 7725 transitions. [2020-10-29 13:16:04,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-29 13:16:04,823 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 54 [2020-10-29 13:16:04,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:16:04,840 INFO L225 Difference]: With dead ends: 5027 [2020-10-29 13:16:04,841 INFO L226 Difference]: Without dead ends: 3694 [2020-10-29 13:16:04,846 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2020-10-29 13:16:04,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3694 states. [2020-10-29 13:16:05,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3694 to 1596. [2020-10-29 13:16:05,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1596 states. [2020-10-29 13:16:05,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1596 states to 1596 states and 2367 transitions. [2020-10-29 13:16:05,109 INFO L78 Accepts]: Start accepts. Automaton has 1596 states and 2367 transitions. Word has length 54 [2020-10-29 13:16:05,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:16:05,109 INFO L481 AbstractCegarLoop]: Abstraction has 1596 states and 2367 transitions. [2020-10-29 13:16:05,109 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 13:16:05,109 INFO L276 IsEmpty]: Start isEmpty. Operand 1596 states and 2367 transitions. [2020-10-29 13:16:05,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-29 13:16:05,111 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:16:05,111 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:16:05,111 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-29 13:16:05,111 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:16:05,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:16:05,112 INFO L82 PathProgramCache]: Analyzing trace with hash -306303547, now seen corresponding path program 1 times [2020-10-29 13:16:05,112 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:16:05,112 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1331768457] [2020-10-29 13:16:05,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:16:05,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:16:05,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:05,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:05,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:05,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:05,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:05,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:06,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:06,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:06,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:06,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:09,724 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:16:09,724 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-29 13:16:09,724 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-29 13:16:09,724 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4589 [2020-10-29 13:16:09,724 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:16:09,724 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:16:09,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:16:09,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-29 13:16:09,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-29 13:16:09,725 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:16:10,011 WARN L193 SmtUtils]: Spent 245.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-29 13:16:10,012 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:16:10,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:16:10,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:10,027 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:16:10,027 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:16:10,027 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:16:10,028 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-29 13:16:10,028 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:16:10,028 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:16:10,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:16:10,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:16:10,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:16:10,029 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:16:10,040 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:16:10,040 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1331768457] [2020-10-29 13:16:10,040 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:16:10,040 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 13:16:10,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907395468] [2020-10-29 13:16:10,041 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:16:10,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:16:10,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:16:10,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:16:10,042 INFO L87 Difference]: Start difference. First operand 1596 states and 2367 transitions. Second operand 6 states. [2020-10-29 13:16:10,317 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-29 13:16:11,844 WARN L193 SmtUtils]: Spent 255.00 ms on a formula simplification that was a NOOP. DAG size: 165 [2020-10-29 13:16:12,137 WARN L193 SmtUtils]: Spent 241.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-29 13:16:12,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:16:12,344 INFO L93 Difference]: Finished difference Result 2268 states and 3395 transitions. [2020-10-29 13:16:12,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-29 13:16:12,345 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 55 [2020-10-29 13:16:12,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:16:12,354 INFO L225 Difference]: With dead ends: 2268 [2020-10-29 13:16:12,354 INFO L226 Difference]: Without dead ends: 2258 [2020-10-29 13:16:12,355 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-29 13:16:12,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2258 states. [2020-10-29 13:16:12,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2258 to 1588. [2020-10-29 13:16:12,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1588 states. [2020-10-29 13:16:12,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1588 states to 1588 states and 2357 transitions. [2020-10-29 13:16:12,576 INFO L78 Accepts]: Start accepts. Automaton has 1588 states and 2357 transitions. Word has length 55 [2020-10-29 13:16:12,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:16:12,576 INFO L481 AbstractCegarLoop]: Abstraction has 1588 states and 2357 transitions. [2020-10-29 13:16:12,576 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:16:12,577 INFO L276 IsEmpty]: Start isEmpty. Operand 1588 states and 2357 transitions. [2020-10-29 13:16:12,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-29 13:16:12,578 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:16:12,578 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:16:12,578 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-29 13:16:12,578 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:16:12,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:16:12,579 INFO L82 PathProgramCache]: Analyzing trace with hash -1591342540, now seen corresponding path program 1 times [2020-10-29 13:16:12,579 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:16:12,579 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [440112250] [2020-10-29 13:16:12,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:16:12,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:16:12,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:12,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:13,282 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:16:13,282 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-29 13:16:13,282 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 13:16:13,282 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 682 [2020-10-29 13:16:13,282 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:16:13,283 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:16:13,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-29 13:16:13,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:16:13,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-29 13:16:13,283 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:16:13,661 WARN L193 SmtUtils]: Spent 236.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-29 13:16:13,662 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:16:13,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:16:13,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:13,674 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:16:13,674 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:16:13,674 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:16:13,674 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-29 13:16:13,674 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:16:13,674 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:16:13,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:16:13,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:16:13,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:16:13,675 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:16:13,690 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:16:13,690 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [440112250] [2020-10-29 13:16:13,690 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:16:13,690 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-29 13:16:13,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015619873] [2020-10-29 13:16:13,691 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-29 13:16:13,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:16:13,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-29 13:16:13,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-29 13:16:13,692 INFO L87 Difference]: Start difference. First operand 1588 states and 2357 transitions. Second operand 9 states. [2020-10-29 13:16:14,015 WARN L193 SmtUtils]: Spent 280.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2020-10-29 13:16:15,526 WARN L193 SmtUtils]: Spent 269.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-29 13:16:15,849 WARN L193 SmtUtils]: Spent 265.00 ms on a formula simplification that was a NOOP. DAG size: 173 [2020-10-29 13:16:16,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:16:16,027 INFO L93 Difference]: Finished difference Result 2859 states and 4330 transitions. [2020-10-29 13:16:16,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-29 13:16:16,028 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 55 [2020-10-29 13:16:16,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:16:16,041 INFO L225 Difference]: With dead ends: 2859 [2020-10-29 13:16:16,041 INFO L226 Difference]: Without dead ends: 2852 [2020-10-29 13:16:16,043 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2020-10-29 13:16:16,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2852 states. [2020-10-29 13:16:16,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2852 to 1583. [2020-10-29 13:16:16,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1583 states. [2020-10-29 13:16:16,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1583 states to 1583 states and 2346 transitions. [2020-10-29 13:16:16,265 INFO L78 Accepts]: Start accepts. Automaton has 1583 states and 2346 transitions. Word has length 55 [2020-10-29 13:16:16,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:16:16,265 INFO L481 AbstractCegarLoop]: Abstraction has 1583 states and 2346 transitions. [2020-10-29 13:16:16,265 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-29 13:16:16,265 INFO L276 IsEmpty]: Start isEmpty. Operand 1583 states and 2346 transitions. [2020-10-29 13:16:16,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-29 13:16:16,269 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:16:16,269 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:16:16,269 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-29 13:16:16,269 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:16:16,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:16:16,270 INFO L82 PathProgramCache]: Analyzing trace with hash -1421780328, now seen corresponding path program 1 times [2020-10-29 13:16:16,270 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:16:16,270 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1463571750] [2020-10-29 13:16:16,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:16:16,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:16:16,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:16,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:16,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:16,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:16,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:16,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:16,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:18,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:18,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:18,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:18,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:18,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:21,308 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:16:21,309 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-29 13:16:21,309 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-29 13:16:21,309 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-29 13:16:21,309 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:16:21,309 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:16:21,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:16:21,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 13:16:21,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-29 13:16:21,310 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:16:21,596 WARN L193 SmtUtils]: Spent 240.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-29 13:16:21,597 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:16:21,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:16:21,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:21,616 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:16:21,616 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:16:21,616 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:16:21,616 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-29 13:16:21,616 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:16:21,617 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:16:21,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:16:21,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:16:21,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 13:16:21,617 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:16:21,630 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:16:21,630 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1463571750] [2020-10-29 13:16:21,630 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:16:21,630 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 13:16:21,630 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975756767] [2020-10-29 13:16:21,631 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:16:21,631 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:16:21,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:16:21,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:16:21,632 INFO L87 Difference]: Start difference. First operand 1583 states and 2346 transitions. Second operand 6 states. [2020-10-29 13:16:21,944 WARN L193 SmtUtils]: Spent 267.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-29 13:16:22,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:16:22,525 INFO L93 Difference]: Finished difference Result 1908 states and 2858 transitions. [2020-10-29 13:16:22,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-29 13:16:22,526 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 70 [2020-10-29 13:16:22,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:16:22,530 INFO L225 Difference]: With dead ends: 1908 [2020-10-29 13:16:22,530 INFO L226 Difference]: Without dead ends: 846 [2020-10-29 13:16:22,533 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-29 13:16:22,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 846 states. [2020-10-29 13:16:22,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 846 to 452. [2020-10-29 13:16:22,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 452 states. [2020-10-29 13:16:22,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 452 states to 452 states and 642 transitions. [2020-10-29 13:16:22,620 INFO L78 Accepts]: Start accepts. Automaton has 452 states and 642 transitions. Word has length 70 [2020-10-29 13:16:22,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:16:22,620 INFO L481 AbstractCegarLoop]: Abstraction has 452 states and 642 transitions. [2020-10-29 13:16:22,620 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:16:22,620 INFO L276 IsEmpty]: Start isEmpty. Operand 452 states and 642 transitions. [2020-10-29 13:16:22,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-29 13:16:22,622 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:16:22,622 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:16:22,622 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-29 13:16:22,622 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:16:22,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:16:22,623 INFO L82 PathProgramCache]: Analyzing trace with hash -1458711945, now seen corresponding path program 1 times [2020-10-29 13:16:22,623 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:16:22,623 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1278054269] [2020-10-29 13:16:22,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:16:22,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:16:22,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:22,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:22,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:22,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:22,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:23,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:23,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:23,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:24,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:24,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:24,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:24,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:24,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:24,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:27,648 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:16:27,649 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-29 13:16:27,649 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-29 13:16:27,649 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-29 13:16:27,649 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:16:27,649 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:16:27,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:16:27,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-29 13:16:27,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-29 13:16:27,649 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:16:27,949 WARN L193 SmtUtils]: Spent 244.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-29 13:16:27,950 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:16:27,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:16:27,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:27,965 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:16:27,965 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:16:27,965 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:16:27,965 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-29 13:16:27,965 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:16:27,965 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:16:27,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:16:27,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:16:27,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:16:27,966 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:16:27,978 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:16:27,979 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1278054269] [2020-10-29 13:16:27,979 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:16:27,979 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 13:16:27,979 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099876189] [2020-10-29 13:16:27,979 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:16:27,979 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:16:27,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:16:27,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:16:27,980 INFO L87 Difference]: Start difference. First operand 452 states and 642 transitions. Second operand 6 states. [2020-10-29 13:16:28,296 WARN L193 SmtUtils]: Spent 261.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-29 13:16:29,267 WARN L193 SmtUtils]: Spent 269.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2020-10-29 13:16:29,542 WARN L193 SmtUtils]: Spent 255.00 ms on a formula simplification that was a NOOP. DAG size: 165 [2020-10-29 13:16:29,870 WARN L193 SmtUtils]: Spent 261.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2020-10-29 13:16:30,147 WARN L193 SmtUtils]: Spent 249.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-29 13:16:30,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:16:30,320 INFO L93 Difference]: Finished difference Result 2402 states and 3666 transitions. [2020-10-29 13:16:30,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-29 13:16:30,321 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 73 [2020-10-29 13:16:30,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:16:30,327 INFO L225 Difference]: With dead ends: 2402 [2020-10-29 13:16:30,327 INFO L226 Difference]: Without dead ends: 2077 [2020-10-29 13:16:30,330 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2020-10-29 13:16:30,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2077 states. [2020-10-29 13:16:30,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2077 to 774. [2020-10-29 13:16:30,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 774 states. [2020-10-29 13:16:30,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 774 states to 774 states and 1128 transitions. [2020-10-29 13:16:30,488 INFO L78 Accepts]: Start accepts. Automaton has 774 states and 1128 transitions. Word has length 73 [2020-10-29 13:16:30,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:16:30,489 INFO L481 AbstractCegarLoop]: Abstraction has 774 states and 1128 transitions. [2020-10-29 13:16:30,489 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:16:30,489 INFO L276 IsEmpty]: Start isEmpty. Operand 774 states and 1128 transitions. [2020-10-29 13:16:30,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-29 13:16:30,490 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:16:30,490 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:16:30,491 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-29 13:16:30,491 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:16:30,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:16:30,491 INFO L82 PathProgramCache]: Analyzing trace with hash -1108220249, now seen corresponding path program 1 times [2020-10-29 13:16:30,492 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:16:30,492 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1636405259] [2020-10-29 13:16:30,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:16:30,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:16:30,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:30,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:30,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:30,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:30,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:30,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:30,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:31,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:31,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:32,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:32,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:35,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:35,522 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:16:35,522 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-29 13:16:35,522 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-29 13:16:35,522 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-29 13:16:35,523 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:16:35,523 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:16:35,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 13:16:35,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 13:16:35,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 63 [2020-10-29 13:16:35,523 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:16:35,827 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-29 13:16:35,830 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:16:35,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:16:35,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:35,845 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:16:35,845 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:16:35,845 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:16:35,845 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-29 13:16:35,846 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:16:35,846 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:16:35,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:16:35,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:16:35,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:16:35,846 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:16:35,866 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:16:35,867 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1636405259] [2020-10-29 13:16:35,867 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:16:35,867 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 13:16:35,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886417776] [2020-10-29 13:16:35,868 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 13:16:35,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:16:35,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 13:16:35,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:16:35,868 INFO L87 Difference]: Start difference. First operand 774 states and 1128 transitions. Second operand 5 states. [2020-10-29 13:16:36,222 WARN L193 SmtUtils]: Spent 298.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-29 13:16:37,280 WARN L193 SmtUtils]: Spent 276.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2020-10-29 13:16:37,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:16:37,364 INFO L93 Difference]: Finished difference Result 1980 states and 2956 transitions. [2020-10-29 13:16:37,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-29 13:16:37,365 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 75 [2020-10-29 13:16:37,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:16:37,367 INFO L225 Difference]: With dead ends: 1980 [2020-10-29 13:16:37,367 INFO L226 Difference]: Without dead ends: 1333 [2020-10-29 13:16:37,369 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-10-29 13:16:37,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1333 states. [2020-10-29 13:16:37,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1333 to 1314. [2020-10-29 13:16:37,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1314 states. [2020-10-29 13:16:37,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1314 states to 1314 states and 1908 transitions. [2020-10-29 13:16:37,635 INFO L78 Accepts]: Start accepts. Automaton has 1314 states and 1908 transitions. Word has length 75 [2020-10-29 13:16:37,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:16:37,636 INFO L481 AbstractCegarLoop]: Abstraction has 1314 states and 1908 transitions. [2020-10-29 13:16:37,636 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 13:16:37,636 INFO L276 IsEmpty]: Start isEmpty. Operand 1314 states and 1908 transitions. [2020-10-29 13:16:37,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-29 13:16:37,639 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:16:37,639 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:16:37,639 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-29 13:16:37,639 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:16:37,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:16:37,640 INFO L82 PathProgramCache]: Analyzing trace with hash 953078623, now seen corresponding path program 1 times [2020-10-29 13:16:37,640 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:16:37,640 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1040078329] [2020-10-29 13:16:37,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:16:37,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:16:37,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:37,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:37,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:37,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:37,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:37,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:38,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:38,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:38,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:39,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:39,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:41,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:42,664 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:16:42,664 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-29 13:16:42,664 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-29 13:16:42,664 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-29 13:16:42,664 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:16:42,665 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:16:42,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:16:42,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-29 13:16:42,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-29 13:16:42,665 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:16:42,977 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-29 13:16:42,978 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:16:42,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:16:42,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:42,991 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:16:42,991 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:16:42,992 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:16:42,992 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-29 13:16:42,992 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:16:42,992 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:16:42,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:16:42,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:16:42,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:16:42,992 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:16:43,011 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:16:43,011 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1040078329] [2020-10-29 13:16:43,011 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:16:43,011 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 13:16:43,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819753358] [2020-10-29 13:16:43,012 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:16:43,012 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:16:43,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:16:43,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:16:43,013 INFO L87 Difference]: Start difference. First operand 1314 states and 1908 transitions. Second operand 6 states. [2020-10-29 13:16:43,359 WARN L193 SmtUtils]: Spent 292.00 ms on a formula simplification that was a NOOP. DAG size: 174 [2020-10-29 13:16:44,471 WARN L193 SmtUtils]: Spent 275.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-29 13:16:44,756 WARN L193 SmtUtils]: Spent 260.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-29 13:16:45,129 WARN L193 SmtUtils]: Spent 282.00 ms on a formula simplification that was a NOOP. DAG size: 171 [2020-10-29 13:16:45,424 WARN L193 SmtUtils]: Spent 259.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-29 13:16:45,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:16:45,688 INFO L93 Difference]: Finished difference Result 4344 states and 6444 transitions. [2020-10-29 13:16:45,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-29 13:16:45,689 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 75 [2020-10-29 13:16:45,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:16:45,695 INFO L225 Difference]: With dead ends: 4344 [2020-10-29 13:16:45,695 INFO L226 Difference]: Without dead ends: 3157 [2020-10-29 13:16:45,698 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2020-10-29 13:16:45,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3157 states. [2020-10-29 13:16:45,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3157 to 1314. [2020-10-29 13:16:45,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1314 states. [2020-10-29 13:16:45,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1314 states to 1314 states and 1892 transitions. [2020-10-29 13:16:45,950 INFO L78 Accepts]: Start accepts. Automaton has 1314 states and 1892 transitions. Word has length 75 [2020-10-29 13:16:45,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:16:45,951 INFO L481 AbstractCegarLoop]: Abstraction has 1314 states and 1892 transitions. [2020-10-29 13:16:45,951 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:16:45,951 INFO L276 IsEmpty]: Start isEmpty. Operand 1314 states and 1892 transitions. [2020-10-29 13:16:45,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-29 13:16:45,953 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:16:45,953 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:16:45,954 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-29 13:16:45,954 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:16:45,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:16:45,954 INFO L82 PathProgramCache]: Analyzing trace with hash 1541722030, now seen corresponding path program 1 times [2020-10-29 13:16:45,955 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:16:45,955 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1781709384] [2020-10-29 13:16:45,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:16:45,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:16:45,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:46,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:46,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:46,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:46,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:46,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:46,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:46,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:46,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:47,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:47,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:47,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:47,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:47,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:47,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:47,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:49,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:49,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:50,984 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:16:50,984 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-29 13:16:50,984 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 18 [2020-10-29 13:16:50,984 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-29 13:16:50,984 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:16:50,984 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:16:50,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 13:16:50,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 13:16:50,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-29 13:16:50,985 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:16:51,378 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-29 13:16:51,379 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:16:51,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:16:51,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:51,402 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:16:51,402 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:16:51,402 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:16:51,402 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-29 13:16:51,402 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:16:51,402 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:16:51,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:16:51,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:16:51,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 13:16:51,403 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:16:51,426 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:16:51,426 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1781709384] [2020-10-29 13:16:51,426 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:16:51,426 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-29 13:16:51,427 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332339934] [2020-10-29 13:16:51,427 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 13:16:51,427 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:16:51,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 13:16:51,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-29 13:16:51,428 INFO L87 Difference]: Start difference. First operand 1314 states and 1892 transitions. Second operand 8 states. [2020-10-29 13:16:51,726 WARN L193 SmtUtils]: Spent 251.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2020-10-29 13:16:52,840 WARN L193 SmtUtils]: Spent 262.00 ms on a formula simplification that was a NOOP. DAG size: 174 [2020-10-29 13:16:53,174 WARN L193 SmtUtils]: Spent 270.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-29 13:16:54,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:16:54,035 INFO L93 Difference]: Finished difference Result 6058 states and 8778 transitions. [2020-10-29 13:16:54,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-29 13:16:54,036 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 75 [2020-10-29 13:16:54,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:16:54,046 INFO L225 Difference]: With dead ends: 6058 [2020-10-29 13:16:54,047 INFO L226 Difference]: Without dead ends: 4871 [2020-10-29 13:16:54,051 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2020-10-29 13:16:54,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4871 states. [2020-10-29 13:16:54,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4871 to 2658. [2020-10-29 13:16:54,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2658 states. [2020-10-29 13:16:54,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2658 states to 2658 states and 3820 transitions. [2020-10-29 13:16:54,582 INFO L78 Accepts]: Start accepts. Automaton has 2658 states and 3820 transitions. Word has length 75 [2020-10-29 13:16:54,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:16:54,582 INFO L481 AbstractCegarLoop]: Abstraction has 2658 states and 3820 transitions. [2020-10-29 13:16:54,582 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 13:16:54,582 INFO L276 IsEmpty]: Start isEmpty. Operand 2658 states and 3820 transitions. [2020-10-29 13:16:54,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-29 13:16:54,585 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:16:54,585 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:16:54,585 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-29 13:16:54,585 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:16:54,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:16:54,586 INFO L82 PathProgramCache]: Analyzing trace with hash -878095954, now seen corresponding path program 1 times [2020-10-29 13:16:54,586 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:16:54,586 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [767927748] [2020-10-29 13:16:54,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:16:54,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:16:54,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:54,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:54,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:54,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:54,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:54,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:54,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:55,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:55,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:56,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:57,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:57,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:59,618 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:16:59,618 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-29 13:16:59,619 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-29 13:16:59,619 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-29 13:16:59,619 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:16:59,619 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:16:59,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:16:59,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-29 13:16:59,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-29 13:16:59,619 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:16:59,908 WARN L193 SmtUtils]: Spent 245.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-29 13:16:59,909 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:16:59,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:16:59,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:59,929 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:16:59,929 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:16:59,929 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:16:59,929 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-29 13:16:59,929 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:16:59,930 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:16:59,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:16:59,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:16:59,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:16:59,930 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:16:59,945 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:16:59,945 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [767927748] [2020-10-29 13:16:59,946 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:16:59,946 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 13:16:59,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505265310] [2020-10-29 13:16:59,946 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:16:59,946 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:16:59,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:16:59,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:16:59,947 INFO L87 Difference]: Start difference. First operand 2658 states and 3820 transitions. Second operand 6 states. [2020-10-29 13:17:00,244 WARN L193 SmtUtils]: Spent 241.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-29 13:17:01,539 WARN L193 SmtUtils]: Spent 250.00 ms on a formula simplification that was a NOOP. DAG size: 165 [2020-10-29 13:17:01,825 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-29 13:17:02,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:17:02,434 INFO L93 Difference]: Finished difference Result 4994 states and 7144 transitions. [2020-10-29 13:17:02,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-29 13:17:02,439 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 75 [2020-10-29 13:17:02,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:17:02,447 INFO L225 Difference]: With dead ends: 4994 [2020-10-29 13:17:02,447 INFO L226 Difference]: Without dead ends: 3735 [2020-10-29 13:17:02,450 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-29 13:17:02,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3735 states. [2020-10-29 13:17:03,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3735 to 2658. [2020-10-29 13:17:03,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2658 states. [2020-10-29 13:17:03,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2658 states to 2658 states and 3788 transitions. [2020-10-29 13:17:03,076 INFO L78 Accepts]: Start accepts. Automaton has 2658 states and 3788 transitions. Word has length 75 [2020-10-29 13:17:03,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:17:03,076 INFO L481 AbstractCegarLoop]: Abstraction has 2658 states and 3788 transitions. [2020-10-29 13:17:03,076 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:17:03,076 INFO L276 IsEmpty]: Start isEmpty. Operand 2658 states and 3788 transitions. [2020-10-29 13:17:03,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-29 13:17:03,078 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:17:03,078 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:17:03,079 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-29 13:17:03,079 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:17:03,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:17:03,079 INFO L82 PathProgramCache]: Analyzing trace with hash -1831130890, now seen corresponding path program 1 times [2020-10-29 13:17:03,079 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:17:03,080 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [857731532] [2020-10-29 13:17:03,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:17:03,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:17:03,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:17:03,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:17:03,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:17:03,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:17:03,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:17:03,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:17:03,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:17:03,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:17:03,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:17:03,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:17:07,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:17:07,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:17:07,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:17:07,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:17:07,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:17:08,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:17:08,105 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:17:08,105 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-29 13:17:08,106 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-29 13:17:08,106 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-29 13:17:08,106 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:17:08,106 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:17:08,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:17:08,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-29 13:17:08,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 63 [2020-10-29 13:17:08,106 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:17:08,438 WARN L193 SmtUtils]: Spent 274.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-29 13:17:08,438 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:17:08,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:17:08,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:17:08,449 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:17:08,449 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:17:08,449 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:17:08,449 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-29 13:17:08,449 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:17:08,449 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:17:08,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:17:08,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:17:08,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:17:08,450 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:17:08,461 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:17:08,462 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [857731532] [2020-10-29 13:17:08,462 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:17:08,462 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 13:17:08,462 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999192221] [2020-10-29 13:17:08,463 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:17:08,463 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:17:08,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:17:08,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:17:08,463 INFO L87 Difference]: Start difference. First operand 2658 states and 3788 transitions. Second operand 6 states. [2020-10-29 13:17:08,781 WARN L193 SmtUtils]: Spent 269.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2020-10-29 13:17:09,823 WARN L193 SmtUtils]: Spent 253.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-29 13:17:10,576 WARN L193 SmtUtils]: Spent 251.00 ms on a formula simplification that was a NOOP. DAG size: 165 [2020-10-29 13:17:10,905 WARN L193 SmtUtils]: Spent 250.00 ms on a formula simplification that was a NOOP. DAG size: 168 [2020-10-29 13:17:11,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:17:11,648 INFO L93 Difference]: Finished difference Result 10877 states and 15718 transitions. [2020-10-29 13:17:11,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-29 13:17:11,649 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 76 [2020-10-29 13:17:11,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:17:11,668 INFO L225 Difference]: With dead ends: 10877 [2020-10-29 13:17:11,668 INFO L226 Difference]: Without dead ends: 8346 [2020-10-29 13:17:11,674 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-10-29 13:17:11,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8346 states. [2020-10-29 13:17:12,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8346 to 5090. [2020-10-29 13:17:12,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5090 states. [2020-10-29 13:17:12,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5090 states to 5090 states and 7276 transitions. [2020-10-29 13:17:12,735 INFO L78 Accepts]: Start accepts. Automaton has 5090 states and 7276 transitions. Word has length 76 [2020-10-29 13:17:12,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:17:12,735 INFO L481 AbstractCegarLoop]: Abstraction has 5090 states and 7276 transitions. [2020-10-29 13:17:12,735 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:17:12,735 INFO L276 IsEmpty]: Start isEmpty. Operand 5090 states and 7276 transitions. [2020-10-29 13:17:12,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-29 13:17:12,737 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:17:12,737 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:17:12,737 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-29 13:17:12,737 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:17:12,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:17:12,737 INFO L82 PathProgramCache]: Analyzing trace with hash 1268159419, now seen corresponding path program 1 times [2020-10-29 13:17:12,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:17:12,738 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2065002884] [2020-10-29 13:17:12,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:17:12,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:17:12,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:17:12,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:17:12,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:17:12,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:17:12,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:17:12,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:17:13,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:17:13,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:17:13,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:17:13,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:17:15,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:17:16,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:17:17,756 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:17:17,756 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-29 13:17:17,757 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-29 13:17:17,757 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-29 13:17:17,757 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:17:17,757 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:17:17,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:17:17,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 13:17:17,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-29 13:17:17,757 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:17:18,064 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-29 13:17:18,064 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:17:18,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:17:18,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:17:18,077 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:17:18,077 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:17:18,077 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:17:18,077 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-29 13:17:18,077 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:17:18,077 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:17:18,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:17:18,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:17:18,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:17:18,078 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:17:18,094 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:17:18,095 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2065002884] [2020-10-29 13:17:18,095 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:17:18,095 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 13:17:18,095 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931980918] [2020-10-29 13:17:18,095 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:17:18,096 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:17:18,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:17:18,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:17:18,096 INFO L87 Difference]: Start difference. First operand 5090 states and 7276 transitions. Second operand 6 states. [2020-10-29 13:17:18,404 WARN L193 SmtUtils]: Spent 268.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2020-10-29 13:17:19,409 WARN L193 SmtUtils]: Spent 269.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-29 13:17:19,687 WARN L193 SmtUtils]: Spent 261.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-29 13:17:20,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:17:20,895 INFO L93 Difference]: Finished difference Result 10395 states and 15058 transitions. [2020-10-29 13:17:20,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-29 13:17:20,896 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 76 [2020-10-29 13:17:20,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:17:20,911 INFO L225 Difference]: With dead ends: 10395 [2020-10-29 13:17:20,912 INFO L226 Difference]: Without dead ends: 7716 [2020-10-29 13:17:20,918 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-29 13:17:20,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7716 states. [2020-10-29 13:17:22,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7716 to 7646. [2020-10-29 13:17:22,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7646 states. [2020-10-29 13:17:22,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7646 states to 7646 states and 10900 transitions. [2020-10-29 13:17:22,493 INFO L78 Accepts]: Start accepts. Automaton has 7646 states and 10900 transitions. Word has length 76 [2020-10-29 13:17:22,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:17:22,493 INFO L481 AbstractCegarLoop]: Abstraction has 7646 states and 10900 transitions. [2020-10-29 13:17:22,493 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:17:22,493 INFO L276 IsEmpty]: Start isEmpty. Operand 7646 states and 10900 transitions. [2020-10-29 13:17:22,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-29 13:17:22,495 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:17:22,495 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:17:22,495 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-29 13:17:22,495 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:17:22,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:17:22,496 INFO L82 PathProgramCache]: Analyzing trace with hash 1862369474, now seen corresponding path program 1 times [2020-10-29 13:17:22,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:17:22,496 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [281457915] [2020-10-29 13:17:22,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:17:22,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:17:22,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:17:22,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:17:22,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:17:22,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:17:22,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:17:22,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:17:22,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:17:22,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:17:23,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:17:23,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:17:25,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:17:25,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:17:25,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:17:25,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:17:25,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:17:26,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:17:27,519 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:17:27,519 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-29 13:17:27,519 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-29 13:17:27,519 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-29 13:17:27,519 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:17:27,520 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:17:27,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:17:27,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-29 13:17:27,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-29 13:17:27,520 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:17:27,823 WARN L193 SmtUtils]: Spent 245.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-29 13:17:27,824 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:17:27,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:17:27,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:17:27,835 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:17:27,835 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:17:27,835 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:17:27,835 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-29 13:17:27,835 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:17:27,836 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:17:27,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:17:27,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:17:27,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:17:27,836 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:17:27,847 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:17:27,848 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [281457915] [2020-10-29 13:17:27,848 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:17:27,848 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 13:17:27,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735102397] [2020-10-29 13:17:27,848 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:17:27,849 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:17:27,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:17:27,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:17:27,849 INFO L87 Difference]: Start difference. First operand 7646 states and 10900 transitions. Second operand 6 states. [2020-10-29 13:17:28,158 WARN L193 SmtUtils]: Spent 256.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2020-10-29 13:17:29,164 WARN L193 SmtUtils]: Spent 253.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-29 13:17:30,484 WARN L193 SmtUtils]: Spent 251.00 ms on a formula simplification that was a NOOP. DAG size: 165 [2020-10-29 13:17:30,892 WARN L193 SmtUtils]: Spent 258.00 ms on a formula simplification that was a NOOP. DAG size: 168 [2020-10-29 13:17:32,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:17:32,740 INFO L93 Difference]: Finished difference Result 21699 states and 30980 transitions. [2020-10-29 13:17:32,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-29 13:17:32,741 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 76 [2020-10-29 13:17:32,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:17:32,766 INFO L225 Difference]: With dead ends: 21699 [2020-10-29 13:17:32,766 INFO L226 Difference]: Without dead ends: 18040 [2020-10-29 13:17:32,775 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-10-29 13:17:32,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18040 states. [2020-10-29 13:17:34,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18040 to 11458. [2020-10-29 13:17:34,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11458 states. [2020-10-29 13:17:35,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11458 states to 11458 states and 16316 transitions. [2020-10-29 13:17:35,013 INFO L78 Accepts]: Start accepts. Automaton has 11458 states and 16316 transitions. Word has length 76 [2020-10-29 13:17:35,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:17:35,014 INFO L481 AbstractCegarLoop]: Abstraction has 11458 states and 16316 transitions. [2020-10-29 13:17:35,014 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:17:35,014 INFO L276 IsEmpty]: Start isEmpty. Operand 11458 states and 16316 transitions. [2020-10-29 13:17:35,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-29 13:17:35,016 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:17:35,016 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:17:35,017 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-29 13:17:35,017 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:17:35,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:17:35,017 INFO L82 PathProgramCache]: Analyzing trace with hash 226852187, now seen corresponding path program 1 times [2020-10-29 13:17:35,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:17:35,017 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [752829373] [2020-10-29 13:17:35,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:17:35,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:17:35,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:17:35,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:17:35,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:17:35,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:17:35,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:17:35,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:17:35,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:17:35,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:17:36,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:17:38,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:17:40,046 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:17:40,046 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-29 13:17:40,046 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-29 13:17:40,046 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-29 13:17:40,046 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:17:40,046 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:17:40,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 13:17:40,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:17:40,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-29 13:17:40,047 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:17:40,379 WARN L193 SmtUtils]: Spent 245.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-29 13:17:40,380 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:17:40,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:17:40,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:17:40,398 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:17:40,398 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:17:40,398 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:17:40,399 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-29 13:17:40,399 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:17:40,399 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:17:40,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:17:40,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:17:40,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:17:40,399 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:17:40,416 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:17:40,416 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [752829373] [2020-10-29 13:17:40,416 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:17:40,417 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-29 13:17:40,417 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349812926] [2020-10-29 13:17:40,417 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 13:17:40,417 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:17:40,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 13:17:40,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-29 13:17:40,418 INFO L87 Difference]: Start difference. First operand 11458 states and 16316 transitions. Second operand 8 states. [2020-10-29 13:17:40,752 WARN L193 SmtUtils]: Spent 263.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-29 13:17:42,905 WARN L193 SmtUtils]: Spent 242.00 ms on a formula simplification that was a NOOP. DAG size: 171 [2020-10-29 13:17:48,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:17:48,788 INFO L93 Difference]: Finished difference Result 36755 states and 51819 transitions. [2020-10-29 13:17:48,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-29 13:17:48,789 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 76 [2020-10-29 13:17:48,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:17:48,832 INFO L225 Difference]: With dead ends: 36755 [2020-10-29 13:17:48,832 INFO L226 Difference]: Without dead ends: 32383 [2020-10-29 13:17:48,845 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2020-10-29 13:17:48,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32383 states. [2020-10-29 13:17:51,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32383 to 11458. [2020-10-29 13:17:51,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11458 states. [2020-10-29 13:17:51,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11458 states to 11458 states and 16315 transitions. [2020-10-29 13:17:51,188 INFO L78 Accepts]: Start accepts. Automaton has 11458 states and 16315 transitions. Word has length 76 [2020-10-29 13:17:51,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:17:51,188 INFO L481 AbstractCegarLoop]: Abstraction has 11458 states and 16315 transitions. [2020-10-29 13:17:51,188 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 13:17:51,189 INFO L276 IsEmpty]: Start isEmpty. Operand 11458 states and 16315 transitions. [2020-10-29 13:17:51,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-29 13:17:51,190 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:17:51,190 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:17:51,190 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-29 13:17:51,191 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:17:51,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:17:51,191 INFO L82 PathProgramCache]: Analyzing trace with hash 747540243, now seen corresponding path program 1 times [2020-10-29 13:17:51,191 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:17:51,191 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [302946219] [2020-10-29 13:17:51,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:17:51,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:17:51,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:17:51,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:17:51,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:17:51,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:17:51,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:17:51,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:17:51,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:17:52,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:17:53,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:17:53,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:17:56,208 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:17:56,208 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-29 13:17:56,208 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-29 13:17:56,208 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-29 13:17:56,208 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:17:56,209 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:17:56,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 13:17:56,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:17:56,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-29 13:17:56,209 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:17:56,586 WARN L193 SmtUtils]: Spent 297.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-29 13:17:56,587 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:17:56,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:17:56,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:17:56,598 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:17:56,598 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:17:56,598 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:17:56,598 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 13:17:56,598 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:17:56,598 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:17:56,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:17:56,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:17:56,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:17:56,599 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:17:56,612 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:17:56,612 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [302946219] [2020-10-29 13:17:56,612 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:17:56,612 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-29 13:17:56,612 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820275357] [2020-10-29 13:17:56,613 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 13:17:56,613 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:17:56,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 13:17:56,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-29 13:17:56,614 INFO L87 Difference]: Start difference. First operand 11458 states and 16315 transitions. Second operand 8 states. [2020-10-29 13:17:56,935 WARN L193 SmtUtils]: Spent 261.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-29 13:17:58,393 WARN L193 SmtUtils]: Spent 262.00 ms on a formula simplification that was a NOOP. DAG size: 171 [2020-10-29 13:17:58,673 WARN L193 SmtUtils]: Spent 242.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-29 13:18:01,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:18:01,096 INFO L93 Difference]: Finished difference Result 24988 states and 35554 transitions. [2020-10-29 13:18:01,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-29 13:18:01,096 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 77 [2020-10-29 13:18:01,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:18:01,113 INFO L225 Difference]: With dead ends: 24988 [2020-10-29 13:18:01,113 INFO L226 Difference]: Without dead ends: 13645 [2020-10-29 13:18:01,128 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2020-10-29 13:18:01,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13645 states. [2020-10-29 13:18:03,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13645 to 11458. [2020-10-29 13:18:03,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11458 states. [2020-10-29 13:18:03,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11458 states to 11458 states and 16225 transitions. [2020-10-29 13:18:03,541 INFO L78 Accepts]: Start accepts. Automaton has 11458 states and 16225 transitions. Word has length 77 [2020-10-29 13:18:03,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:18:03,541 INFO L481 AbstractCegarLoop]: Abstraction has 11458 states and 16225 transitions. [2020-10-29 13:18:03,541 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 13:18:03,541 INFO L276 IsEmpty]: Start isEmpty. Operand 11458 states and 16225 transitions. [2020-10-29 13:18:03,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-29 13:18:03,543 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:18:03,543 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:18:03,543 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-29 13:18:03,543 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:18:03,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:18:03,544 INFO L82 PathProgramCache]: Analyzing trace with hash 817107478, now seen corresponding path program 1 times [2020-10-29 13:18:03,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:18:03,544 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1770523976] [2020-10-29 13:18:03,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:18:03,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:18:03,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:03,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:03,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:03,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:04,664 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:18:04,665 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-29 13:18:04,665 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 13:18:04,665 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1102 [2020-10-29 13:18:04,665 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:18:04,665 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:18:04,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:18:04,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 13:18:04,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-29 13:18:04,665 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:18:04,971 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-29 13:18:04,972 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:18:04,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:18:04,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:04,993 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:18:04,993 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:18:04,993 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:18:04,993 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-29 13:18:04,994 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:18:04,994 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:18:04,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:18:04,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:18:04,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 13:18:04,994 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:18:05,009 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:18:05,009 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1770523976] [2020-10-29 13:18:05,009 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:18:05,009 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 13:18:05,009 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527405733] [2020-10-29 13:18:05,010 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:18:05,010 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:18:05,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:18:05,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:18:05,011 INFO L87 Difference]: Start difference. First operand 11458 states and 16225 transitions. Second operand 6 states. [2020-10-29 13:18:05,306 WARN L193 SmtUtils]: Spent 246.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-29 13:18:06,152 WARN L193 SmtUtils]: Spent 246.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2020-10-29 13:18:07,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:18:07,706 INFO L93 Difference]: Finished difference Result 18344 states and 26173 transitions. [2020-10-29 13:18:07,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-29 13:18:07,707 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 78 [2020-10-29 13:18:07,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:18:07,719 INFO L225 Difference]: With dead ends: 18344 [2020-10-29 13:18:07,720 INFO L226 Difference]: Without dead ends: 10414 [2020-10-29 13:18:07,731 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-10-29 13:18:07,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10414 states. [2020-10-29 13:18:09,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10414 to 6971. [2020-10-29 13:18:09,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6971 states. [2020-10-29 13:18:09,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6971 states to 6971 states and 9951 transitions. [2020-10-29 13:18:09,131 INFO L78 Accepts]: Start accepts. Automaton has 6971 states and 9951 transitions. Word has length 78 [2020-10-29 13:18:09,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:18:09,131 INFO L481 AbstractCegarLoop]: Abstraction has 6971 states and 9951 transitions. [2020-10-29 13:18:09,131 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:18:09,131 INFO L276 IsEmpty]: Start isEmpty. Operand 6971 states and 9951 transitions. [2020-10-29 13:18:09,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-29 13:18:09,133 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:18:09,133 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:18:09,133 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-29 13:18:09,133 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:18:09,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:18:09,134 INFO L82 PathProgramCache]: Analyzing trace with hash -325429288, now seen corresponding path program 1 times [2020-10-29 13:18:09,134 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:18:09,134 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [689568217] [2020-10-29 13:18:09,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:18:09,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:18:09,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:09,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:09,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:09,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:09,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:09,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:10,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:11,972 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:18:11,973 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-29 13:18:11,973 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-29 13:18:11,973 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2821 [2020-10-29 13:18:11,973 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:18:11,973 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:18:11,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 13:18:11,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:18:11,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-29 13:18:11,974 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:18:12,293 WARN L193 SmtUtils]: Spent 242.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-29 13:18:12,295 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:18:12,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:18:12,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:12,306 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:18:12,306 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:18:12,306 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:18:12,306 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-29 13:18:12,306 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:18:12,306 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:18:12,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:18:12,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:18:12,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:18:12,307 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:18:12,320 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:18:12,320 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [689568217] [2020-10-29 13:18:12,320 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:18:12,320 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-29 13:18:12,320 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2285837] [2020-10-29 13:18:12,321 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 13:18:12,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:18:12,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 13:18:12,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-29 13:18:12,321 INFO L87 Difference]: Start difference. First operand 6971 states and 9951 transitions. Second operand 8 states. [2020-10-29 13:18:12,659 WARN L193 SmtUtils]: Spent 280.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-29 13:18:14,279 WARN L193 SmtUtils]: Spent 264.00 ms on a formula simplification that was a NOOP. DAG size: 171 [2020-10-29 13:18:16,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:18:16,838 INFO L93 Difference]: Finished difference Result 21154 states and 30089 transitions. [2020-10-29 13:18:16,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-29 13:18:16,838 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 79 [2020-10-29 13:18:16,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:18:16,855 INFO L225 Difference]: With dead ends: 21154 [2020-10-29 13:18:16,855 INFO L226 Difference]: Without dead ends: 14252 [2020-10-29 13:18:16,865 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2020-10-29 13:18:16,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14252 states. [2020-10-29 13:18:18,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14252 to 6971. [2020-10-29 13:18:18,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6971 states. [2020-10-29 13:18:18,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6971 states to 6971 states and 9950 transitions. [2020-10-29 13:18:18,343 INFO L78 Accepts]: Start accepts. Automaton has 6971 states and 9950 transitions. Word has length 79 [2020-10-29 13:18:18,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:18:18,343 INFO L481 AbstractCegarLoop]: Abstraction has 6971 states and 9950 transitions. [2020-10-29 13:18:18,343 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 13:18:18,343 INFO L276 IsEmpty]: Start isEmpty. Operand 6971 states and 9950 transitions. [2020-10-29 13:18:18,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-29 13:18:18,345 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:18:18,345 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:18:18,345 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-29 13:18:18,345 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:18:18,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:18:18,345 INFO L82 PathProgramCache]: Analyzing trace with hash -538313965, now seen corresponding path program 1 times [2020-10-29 13:18:18,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:18:18,345 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [104422044] [2020-10-29 13:18:18,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:18:18,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:18:18,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:18,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:18,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:18,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:20,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking...