/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SHALLOWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.3.ufo.UNBOUNDED.pals.c.v+sep-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 05:12:35,174 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 05:12:35,177 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 05:12:35,218 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 05:12:35,218 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 05:12:35,220 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 05:12:35,222 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 05:12:35,224 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 05:12:35,227 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 05:12:35,229 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 05:12:35,231 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 05:12:35,233 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 05:12:35,233 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 05:12:35,235 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 05:12:35,236 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 05:12:35,238 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 05:12:35,239 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 05:12:35,240 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 05:12:35,250 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 05:12:35,253 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 05:12:35,255 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 05:12:35,257 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 05:12:35,258 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 05:12:35,259 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 05:12:35,263 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 05:12:35,263 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 05:12:35,264 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 05:12:35,265 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 05:12:35,266 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 05:12:35,267 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 05:12:35,267 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 05:12:35,268 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 05:12:35,269 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 05:12:35,271 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 05:12:35,272 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 05:12:35,272 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 05:12:35,273 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 05:12:35,274 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 05:12:35,274 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 05:12:35,275 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 05:12:35,276 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 05:12:35,281 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-27 05:12:35,331 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 05:12:35,332 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 05:12:35,334 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 05:12:35,334 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 05:12:35,334 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 05:12:35,335 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 05:12:35,335 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 05:12:35,335 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 05:12:35,335 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 05:12:35,336 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 05:12:35,336 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 05:12:35,336 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 05:12:35,336 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 05:12:35,336 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 05:12:35,337 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 05:12:35,337 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 05:12:35,337 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 05:12:35,337 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 05:12:35,338 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 05:12:35,338 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 05:12:35,338 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 05:12:35,338 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 05:12:35,339 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 05:12:35,339 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 05:12:35,339 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 05:12:35,339 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 05:12:35,340 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 05:12:35,340 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 05:12:35,340 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 05:12:35,340 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 05:12:35,724 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 05:12:35,766 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 05:12:35,772 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 05:12:35,773 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 05:12:35,774 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 05:12:35,775 INFO L432 ainManager$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 [2020-10-27 05:12:35,875 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/fb9d9000d/76b8c68d74a54527a2b7987faf3a8d1b/FLAG6677aa7b6 [2020-10-27 05:12:36,513 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 05:12:36,513 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 [2020-10-27 05:12:36,534 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/fb9d9000d/76b8c68d74a54527a2b7987faf3a8d1b/FLAG6677aa7b6 [2020-10-27 05:12:36,785 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/fb9d9000d/76b8c68d74a54527a2b7987faf3a8d1b [2020-10-27 05:12:36,789 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 05:12:36,796 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 05:12:36,798 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 05:12:36,798 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 05:12:36,803 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 05:12:36,804 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 05:12:36" (1/1) ... [2020-10-27 05:12:36,808 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3895647d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:12:36, skipping insertion in model container [2020-10-27 05:12:36,808 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 05:12:36" (1/1) ... [2020-10-27 05:12:36,817 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 05:12:36,898 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 05:12:37,461 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 05:12:37,493 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 05:12:37,793 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 05:12:37,815 INFO L208 MainTranslator]: Completed translation [2020-10-27 05:12:37,816 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:12:37 WrapperNode [2020-10-27 05:12:37,816 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 05:12:37,817 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 05:12:37,818 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 05:12:37,818 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 05:12:37,834 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:12:37" (1/1) ... [2020-10-27 05:12:37,835 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:12:37" (1/1) ... [2020-10-27 05:12:37,853 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:12:37" (1/1) ... [2020-10-27 05:12:37,854 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:12:37" (1/1) ... [2020-10-27 05:12:37,884 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:12:37" (1/1) ... [2020-10-27 05:12:37,904 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:12:37" (1/1) ... [2020-10-27 05:12:37,911 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:12:37" (1/1) ... [2020-10-27 05:12:37,925 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 05:12:37,928 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 05:12:37,928 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 05:12:37,928 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 05:12:37,931 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:12:37" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 05:12:38,028 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 05:12:38,029 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 05:12:38,029 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 05:12:38,029 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-27 05:12:38,030 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 05:12:38,030 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 05:12:38,031 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 05:12:38,031 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 05:12:38,031 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 05:12:38,031 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-27 05:12:38,032 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-27 05:12:38,032 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-10-27 05:12:38,033 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-27 05:12:38,033 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-27 05:12:38,033 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-27 05:12:38,034 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-27 05:12:38,034 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-27 05:12:38,034 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-27 05:12:38,034 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-27 05:12:38,035 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-27 05:12:38,035 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-27 05:12:38,035 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 05:12:38,035 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 05:12:38,035 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 05:12:38,035 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 05:12:38,036 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 05:12:38,036 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 05:12:38,036 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 05:12:39,620 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 05:12:39,620 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-27 05:12:39,623 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 05:12:39 BoogieIcfgContainer [2020-10-27 05:12:39,623 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 05:12:39,625 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 05:12:39,625 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 05:12:39,629 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 05:12:39,630 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 05:12:36" (1/3) ... [2020-10-27 05:12:39,631 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d7ad5c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 05:12:39, skipping insertion in model container [2020-10-27 05:12:39,631 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:12:37" (2/3) ... [2020-10-27 05:12:39,631 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d7ad5c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 05:12:39, skipping insertion in model container [2020-10-27 05:12:39,631 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 05:12:39" (3/3) ... [2020-10-27 05:12:39,633 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.3.ufo.UNBOUNDED.pals.c.v+sep-reducer.c [2020-10-27 05:12:39,647 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 05:12:39,653 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 05:12:39,680 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 05:12:39,712 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 05:12:39,712 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 05:12:39,713 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 05:12:39,713 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 05:12:39,713 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 05:12:39,713 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 05:12:39,713 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 05:12:39,713 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 05:12:39,740 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states. [2020-10-27 05:12:39,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-27 05:12:39,754 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:12:39,755 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] [2020-10-27 05:12:39,755 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:12:39,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:12:39,762 INFO L82 PathProgramCache]: Analyzing trace with hash -624284439, now seen corresponding path program 1 times [2020-10-27 05:12:39,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:12:39,773 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1193795055] [2020-10-27 05:12:39,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:12:40,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:12:40,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:40,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:41,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:41,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:41,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:42,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:42,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:43,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:43,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:44,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:44,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:44,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:45,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:45,109 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:12:45,109 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-27 05:12:45,110 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-27 05:12:45,110 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-27 05:12:45,112 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:12:45,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 05:12:45,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:12:45,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-27 05:12:45,114 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 05:12:45,828 WARN L193 SmtUtils]: Spent 304.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-27 05:12:45,834 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:12:45,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:12:45,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:45,878 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:12:45,879 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:12:45,879 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:12:45,879 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 31 [2020-10-27 05:12:45,879 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:12:45,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:12:45,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:12:45,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:12:45,880 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:12:45,919 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:12:45,920 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1193795055] [2020-10-27 05:12:45,922 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:12:45,923 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-27 05:12:45,924 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141137489] [2020-10-27 05:12:45,930 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 05:12:45,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:12:45,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 05:12:45,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-10-27 05:12:45,956 INFO L87 Difference]: Start difference. First operand 275 states. Second operand 11 states. [2020-10-27 05:12:46,940 WARN L193 SmtUtils]: Spent 798.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 177 [2020-10-27 05:12:49,817 WARN L193 SmtUtils]: Spent 689.00 ms on a formula simplification. DAG size of input: 177 DAG size of output: 174 [2020-10-27 05:12:50,254 WARN L193 SmtUtils]: Spent 254.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2020-10-27 05:12:50,563 WARN L193 SmtUtils]: Spent 264.00 ms on a formula simplification that was a NOOP. DAG size: 171 [2020-10-27 05:12:51,384 WARN L193 SmtUtils]: Spent 245.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-27 05:12:51,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:12:51,470 INFO L93 Difference]: Finished difference Result 597 states and 987 transitions. [2020-10-27 05:12:51,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 05:12:51,471 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 52 [2020-10-27 05:12:51,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:12:51,486 INFO L225 Difference]: With dead ends: 597 [2020-10-27 05:12:51,486 INFO L226 Difference]: Without dead ends: 407 [2020-10-27 05:12:51,492 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=145, Invalid=407, Unknown=0, NotChecked=0, Total=552 [2020-10-27 05:12:51,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states. [2020-10-27 05:12:51,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 262. [2020-10-27 05:12:51,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 262 states. [2020-10-27 05:12:51,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 349 transitions. [2020-10-27 05:12:51,581 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 349 transitions. Word has length 52 [2020-10-27 05:12:51,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:12:51,582 INFO L481 AbstractCegarLoop]: Abstraction has 262 states and 349 transitions. [2020-10-27 05:12:51,582 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 05:12:51,582 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 349 transitions. [2020-10-27 05:12:51,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-27 05:12:51,585 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:12:51,585 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] [2020-10-27 05:12:51,586 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 05:12:51,586 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:12:51,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:12:51,587 INFO L82 PathProgramCache]: Analyzing trace with hash 1975459649, now seen corresponding path program 1 times [2020-10-27 05:12:51,587 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:12:51,587 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1794590916] [2020-10-27 05:12:51,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:12:51,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:12:51,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:51,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:51,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:52,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:52,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:52,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:53,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:53,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:54,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:56,645 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:12:56,646 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-27 05:12:56,646 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-27 05:12:56,646 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-27 05:12:56,647 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:12:56,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 05:12:56,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:12:56,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-27 05:12:56,648 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 05:12:57,049 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-27 05:12:57,050 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:12:57,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:12:57,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:57,088 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:12:57,088 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:12:57,089 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:12:57,090 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-10-27 05:12:57,090 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:12:57,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:12:57,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:12:57,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:12:57,091 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:12:57,120 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:12:57,120 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1794590916] [2020-10-27 05:12:57,121 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:12:57,121 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-27 05:12:57,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537494826] [2020-10-27 05:12:57,125 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 05:12:57,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:12:57,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 05:12:57,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-10-27 05:12:57,137 INFO L87 Difference]: Start difference. First operand 262 states and 349 transitions. Second operand 11 states. [2020-10-27 05:12:57,491 WARN L193 SmtUtils]: Spent 277.00 ms on a formula simplification that was a NOOP. DAG size: 174 [2020-10-27 05:12:58,893 WARN L193 SmtUtils]: Spent 271.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-27 05:12:59,304 WARN L193 SmtUtils]: Spent 282.00 ms on a formula simplification that was a NOOP. DAG size: 171 [2020-10-27 05:12:59,596 WARN L193 SmtUtils]: Spent 264.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2020-10-27 05:13:00,560 WARN L193 SmtUtils]: Spent 279.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-27 05:13:00,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:13:00,640 INFO L93 Difference]: Finished difference Result 596 states and 832 transitions. [2020-10-27 05:13:00,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-27 05:13:00,642 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 52 [2020-10-27 05:13:00,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:13:00,651 INFO L225 Difference]: With dead ends: 596 [2020-10-27 05:13:00,652 INFO L226 Difference]: Without dead ends: 589 [2020-10-27 05:13:00,654 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=164, Invalid=486, Unknown=0, NotChecked=0, Total=650 [2020-10-27 05:13:00,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 589 states. [2020-10-27 05:13:00,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 589 to 277. [2020-10-27 05:13:00,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 277 states. [2020-10-27 05:13:00,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 368 transitions. [2020-10-27 05:13:00,722 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 368 transitions. Word has length 52 [2020-10-27 05:13:00,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:13:00,723 INFO L481 AbstractCegarLoop]: Abstraction has 277 states and 368 transitions. [2020-10-27 05:13:00,723 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 05:13:00,723 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 368 transitions. [2020-10-27 05:13:00,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-27 05:13:00,737 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:13:00,737 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] [2020-10-27 05:13:00,738 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 05:13:00,738 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:13:00,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:13:00,739 INFO L82 PathProgramCache]: Analyzing trace with hash 936770437, now seen corresponding path program 1 times [2020-10-27 05:13:00,739 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:13:00,740 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [62394642] [2020-10-27 05:13:00,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:13:00,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:13:00,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:00,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:01,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:01,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:01,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:01,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:02,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:02,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:03,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:03,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:04,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:04,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:05,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:05,779 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:13:05,779 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-27 05:13:05,780 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-27 05:13:05,780 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-27 05:13:05,780 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:13:05,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 05:13:05,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:13:05,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-27 05:13:05,781 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:13:06,265 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-27 05:13:06,267 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:13:06,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:13:06,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:06,305 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:13:06,305 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:13:06,306 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:13:06,306 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-27 05:13:06,306 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:13:06,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:13:06,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:13:06,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:13:06,307 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:13:06,332 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:13:06,333 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [62394642] [2020-10-27 05:13:06,333 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:13:06,333 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-27 05:13:06,333 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646079470] [2020-10-27 05:13:06,334 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 05:13:06,334 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:13:06,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 05:13:06,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-10-27 05:13:06,335 INFO L87 Difference]: Start difference. First operand 277 states and 368 transitions. Second operand 11 states. [2020-10-27 05:13:06,966 WARN L193 SmtUtils]: Spent 501.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 177 [2020-10-27 05:13:08,802 WARN L193 SmtUtils]: Spent 535.00 ms on a formula simplification. DAG size of input: 183 DAG size of output: 173 [2020-10-27 05:13:09,455 WARN L193 SmtUtils]: Spent 538.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 179 [2020-10-27 05:13:09,710 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2020-10-27 05:13:11,293 WARN L193 SmtUtils]: Spent 536.00 ms on a formula simplification. DAG size of input: 178 DAG size of output: 175 [2020-10-27 05:13:11,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:13:11,519 INFO L93 Difference]: Finished difference Result 1240 states and 1825 transitions. [2020-10-27 05:13:11,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 05:13:11,520 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 52 [2020-10-27 05:13:11,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:13:11,527 INFO L225 Difference]: With dead ends: 1240 [2020-10-27 05:13:11,527 INFO L226 Difference]: Without dead ends: 1138 [2020-10-27 05:13:11,529 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=191, Invalid=511, Unknown=0, NotChecked=0, Total=702 [2020-10-27 05:13:11,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1138 states. [2020-10-27 05:13:11,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1138 to 275. [2020-10-27 05:13:11,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 275 states. [2020-10-27 05:13:11,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 365 transitions. [2020-10-27 05:13:11,571 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 365 transitions. Word has length 52 [2020-10-27 05:13:11,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:13:11,571 INFO L481 AbstractCegarLoop]: Abstraction has 275 states and 365 transitions. [2020-10-27 05:13:11,571 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 05:13:11,572 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 365 transitions. [2020-10-27 05:13:11,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-27 05:13:11,573 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:13:11,573 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] [2020-10-27 05:13:11,573 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 05:13:11,573 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:13:11,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:13:11,574 INFO L82 PathProgramCache]: Analyzing trace with hash -129996473, now seen corresponding path program 1 times [2020-10-27 05:13:11,574 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:13:11,574 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [117219228] [2020-10-27 05:13:11,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:13:11,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:13:11,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:11,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:11,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:11,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:12,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:12,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:13,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:13,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:13,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:13,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:14,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:14,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:14,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:15,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:16,616 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:13:16,623 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-27 05:13:16,623 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-27 05:13:16,623 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-27 05:13:16,623 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:13:16,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 05:13:16,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:13:16,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-27 05:13:16,624 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:13:17,056 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-27 05:13:17,057 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:13:17,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:13:17,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:17,087 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:13:17,087 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:13:17,087 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:13:17,088 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-27 05:13:17,088 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:13:17,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:13:17,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:13:17,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:13:17,088 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:13:17,119 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:13:17,119 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [117219228] [2020-10-27 05:13:17,119 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:13:17,119 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-10-27 05:13:17,120 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334572838] [2020-10-27 05:13:17,120 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 05:13:17,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:13:17,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 05:13:17,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2020-10-27 05:13:17,121 INFO L87 Difference]: Start difference. First operand 275 states and 365 transitions. Second operand 12 states. [2020-10-27 05:13:17,820 WARN L193 SmtUtils]: Spent 588.00 ms on a formula simplification. DAG size of input: 181 DAG size of output: 179 [2020-10-27 05:13:19,780 WARN L193 SmtUtils]: Spent 580.00 ms on a formula simplification. DAG size of input: 184 DAG size of output: 182 [2020-10-27 05:13:20,181 WARN L193 SmtUtils]: Spent 287.00 ms on a formula simplification that was a NOOP. DAG size: 183 [2020-10-27 05:13:21,710 WARN L193 SmtUtils]: Spent 611.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 177 [2020-10-27 05:13:22,056 WARN L193 SmtUtils]: Spent 298.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2020-10-27 05:13:22,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:13:22,129 INFO L93 Difference]: Finished difference Result 464 states and 630 transitions. [2020-10-27 05:13:22,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-27 05:13:22,129 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 53 [2020-10-27 05:13:22,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:13:22,133 INFO L225 Difference]: With dead ends: 464 [2020-10-27 05:13:22,133 INFO L226 Difference]: Without dead ends: 456 [2020-10-27 05:13:22,135 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=338, Invalid=922, Unknown=0, NotChecked=0, Total=1260 [2020-10-27 05:13:22,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 456 states. [2020-10-27 05:13:22,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 456 to 275. [2020-10-27 05:13:22,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 275 states. [2020-10-27 05:13:22,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 363 transitions. [2020-10-27 05:13:22,166 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 363 transitions. Word has length 53 [2020-10-27 05:13:22,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:13:22,167 INFO L481 AbstractCegarLoop]: Abstraction has 275 states and 363 transitions. [2020-10-27 05:13:22,167 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 05:13:22,167 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 363 transitions. [2020-10-27 05:13:22,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-27 05:13:22,168 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:13:22,168 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] [2020-10-27 05:13:22,168 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 05:13:22,169 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:13:22,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:13:22,169 INFO L82 PathProgramCache]: Analyzing trace with hash 914400266, now seen corresponding path program 1 times [2020-10-27 05:13:22,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:13:22,170 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [142958763] [2020-10-27 05:13:22,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:13:22,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:13:22,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:22,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:22,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:22,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:23,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:23,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:23,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:23,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:23,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:24,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:24,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:24,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:24,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:25,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:25,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:26,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:27,205 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:13:27,205 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-27 05:13:27,206 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-27 05:13:27,206 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-27 05:13:27,206 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:13:27,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 05:13:27,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:13:27,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-27 05:13:27,207 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:13:27,626 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-27 05:13:27,627 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:13:27,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:13:27,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:27,663 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:13:27,663 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:13:27,663 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:13:27,664 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-10-27 05:13:27,664 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:13:27,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:13:27,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:13:27,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:13:27,664 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:13:27,691 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:13:27,691 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [142958763] [2020-10-27 05:13:27,691 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:13:27,691 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-27 05:13:27,692 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194886629] [2020-10-27 05:13:27,692 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 05:13:27,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:13:27,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 05:13:27,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-10-27 05:13:27,693 INFO L87 Difference]: Start difference. First operand 275 states and 363 transitions. Second operand 10 states. [2020-10-27 05:13:28,015 WARN L193 SmtUtils]: Spent 262.00 ms on a formula simplification that was a NOOP. DAG size: 174 [2020-10-27 05:13:29,118 WARN L193 SmtUtils]: Spent 250.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2020-10-27 05:13:29,466 WARN L193 SmtUtils]: Spent 261.00 ms on a formula simplification that was a NOOP. DAG size: 174 [2020-10-27 05:13:30,715 WARN L193 SmtUtils]: Spent 541.00 ms on a formula simplification. DAG size of input: 174 DAG size of output: 173 [2020-10-27 05:13:31,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:13:31,039 INFO L93 Difference]: Finished difference Result 475 states and 659 transitions. [2020-10-27 05:13:31,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-27 05:13:31,040 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 53 [2020-10-27 05:13:31,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:13:31,043 INFO L225 Difference]: With dead ends: 475 [2020-10-27 05:13:31,043 INFO L226 Difference]: Without dead ends: 469 [2020-10-27 05:13:31,044 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=204, Invalid=608, Unknown=0, NotChecked=0, Total=812 [2020-10-27 05:13:31,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 469 states. [2020-10-27 05:13:31,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 469 to 275. [2020-10-27 05:13:31,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 275 states. [2020-10-27 05:13:31,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 362 transitions. [2020-10-27 05:13:31,076 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 362 transitions. Word has length 53 [2020-10-27 05:13:31,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:13:31,077 INFO L481 AbstractCegarLoop]: Abstraction has 275 states and 362 transitions. [2020-10-27 05:13:31,077 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 05:13:31,077 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 362 transitions. [2020-10-27 05:13:31,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-27 05:13:31,078 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:13:31,078 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] [2020-10-27 05:13:31,078 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 05:13:31,078 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:13:31,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:13:31,079 INFO L82 PathProgramCache]: Analyzing trace with hash 13201138, now seen corresponding path program 1 times [2020-10-27 05:13:31,079 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:13:31,079 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1117411101] [2020-10-27 05:13:31,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:13:31,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:13:31,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:31,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:31,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:31,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:32,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:32,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:32,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:33,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:33,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:33,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:33,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:34,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:34,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:34,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:36,109 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:13:36,110 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-27 05:13:36,110 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-27 05:13:36,110 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-27 05:13:36,110 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:13:36,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 05:13:36,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:13:36,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-27 05:13:36,111 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:13:36,553 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-27 05:13:36,554 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:13:36,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:13:36,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:36,588 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:13:36,589 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:13:36,589 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:13:36,589 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-10-27 05:13:36,589 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:13:36,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:13:36,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:13:36,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:13:36,590 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:13:36,614 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:13:36,616 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1117411101] [2020-10-27 05:13:36,617 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:13:36,617 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-10-27 05:13:36,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524574875] [2020-10-27 05:13:36,618 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 05:13:36,618 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:13:36,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 05:13:36,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-10-27 05:13:36,620 INFO L87 Difference]: Start difference. First operand 275 states and 362 transitions. Second operand 13 states. [2020-10-27 05:13:37,374 WARN L193 SmtUtils]: Spent 642.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 181 [2020-10-27 05:13:38,883 WARN L193 SmtUtils]: Spent 301.00 ms on a formula simplification that was a NOOP. DAG size: 174 [2020-10-27 05:13:39,245 WARN L193 SmtUtils]: Spent 268.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2020-10-27 05:13:39,586 WARN L193 SmtUtils]: Spent 288.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-27 05:13:40,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:13:40,933 INFO L93 Difference]: Finished difference Result 925 states and 1318 transitions. [2020-10-27 05:13:40,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-27 05:13:40,934 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 53 [2020-10-27 05:13:40,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:13:40,941 INFO L225 Difference]: With dead ends: 925 [2020-10-27 05:13:40,942 INFO L226 Difference]: Without dead ends: 765 [2020-10-27 05:13:40,944 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=270, Invalid=920, Unknown=0, NotChecked=0, Total=1190 [2020-10-27 05:13:40,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 765 states. [2020-10-27 05:13:41,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 765 to 354. [2020-10-27 05:13:41,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 354 states. [2020-10-27 05:13:41,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 487 transitions. [2020-10-27 05:13:41,013 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 487 transitions. Word has length 53 [2020-10-27 05:13:41,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:13:41,014 INFO L481 AbstractCegarLoop]: Abstraction has 354 states and 487 transitions. [2020-10-27 05:13:41,014 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 05:13:41,014 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 487 transitions. [2020-10-27 05:13:41,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-27 05:13:41,016 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:13:41,016 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] [2020-10-27 05:13:41,016 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 05:13:41,016 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:13:41,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:13:41,017 INFO L82 PathProgramCache]: Analyzing trace with hash 1599900216, now seen corresponding path program 1 times [2020-10-27 05:13:41,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:13:41,023 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1031773929] [2020-10-27 05:13:41,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:13:41,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:13:41,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:41,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:41,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:41,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:41,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:41,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:42,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:42,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:42,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:43,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:43,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:43,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:43,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:43,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:44,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:45,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:46,054 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:13:46,054 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-27 05:13:46,054 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-27 05:13:46,054 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-27 05:13:46,054 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:13:46,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 05:13:46,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:13:46,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-27 05:13:46,055 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:13:46,391 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-27 05:13:46,393 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:13:46,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:13:46,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:46,428 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:13:46,428 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:13:46,429 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:13:46,429 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-10-27 05:13:46,429 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:13:46,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:13:46,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:13:46,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:13:46,429 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:13:46,452 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:13:46,453 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1031773929] [2020-10-27 05:13:46,453 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:13:46,454 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-27 05:13:46,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347266107] [2020-10-27 05:13:46,454 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 05:13:46,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:13:46,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 05:13:46,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-27 05:13:46,455 INFO L87 Difference]: Start difference. First operand 354 states and 487 transitions. Second operand 9 states. [2020-10-27 05:13:46,782 WARN L193 SmtUtils]: Spent 267.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-27 05:13:47,797 WARN L193 SmtUtils]: Spent 275.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2020-10-27 05:13:48,163 WARN L193 SmtUtils]: Spent 252.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2020-10-27 05:13:49,163 WARN L193 SmtUtils]: Spent 253.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-27 05:13:49,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:13:49,335 INFO L93 Difference]: Finished difference Result 1155 states and 1690 transitions. [2020-10-27 05:13:49,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 05:13:49,335 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 53 [2020-10-27 05:13:49,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:13:49,341 INFO L225 Difference]: With dead ends: 1155 [2020-10-27 05:13:49,341 INFO L226 Difference]: Without dead ends: 924 [2020-10-27 05:13:49,342 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=94, Invalid=248, Unknown=0, NotChecked=0, Total=342 [2020-10-27 05:13:49,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 924 states. [2020-10-27 05:13:49,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 924 to 332. [2020-10-27 05:13:49,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 332 states. [2020-10-27 05:13:49,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 455 transitions. [2020-10-27 05:13:49,405 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 455 transitions. Word has length 53 [2020-10-27 05:13:49,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:13:49,405 INFO L481 AbstractCegarLoop]: Abstraction has 332 states and 455 transitions. [2020-10-27 05:13:49,405 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 05:13:49,405 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 455 transitions. [2020-10-27 05:13:49,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-27 05:13:49,406 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:13:49,406 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] [2020-10-27 05:13:49,407 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 05:13:49,407 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:13:49,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:13:49,407 INFO L82 PathProgramCache]: Analyzing trace with hash 350207193, now seen corresponding path program 1 times [2020-10-27 05:13:49,408 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:13:49,408 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [545229919] [2020-10-27 05:13:49,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:13:49,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:13:49,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:49,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:49,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:49,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:49,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:50,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:50,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:50,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:50,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:50,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:50,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:51,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:51,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:51,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:54,437 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:13:54,437 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-27 05:13:54,437 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-27 05:13:54,437 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-27 05:13:54,437 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:13:54,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 05:13:54,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:13:54,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-27 05:13:54,438 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:13:54,817 WARN L193 SmtUtils]: Spent 317.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-27 05:13:54,817 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:13:54,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:13:54,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:54,865 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:13:54,865 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:13:54,865 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:13:54,868 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 32 [2020-10-27 05:13:54,868 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:13:54,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:13:54,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:13:54,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:13:54,869 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:13:54,896 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:13:54,897 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [545229919] [2020-10-27 05:13:54,897 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:13:54,897 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:13:54,898 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20628805] [2020-10-27 05:13:54,899 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 05:13:54,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:13:54,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 05:13:54,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:13:54,901 INFO L87 Difference]: Start difference. First operand 332 states and 455 transitions. Second operand 6 states. [2020-10-27 05:13:55,300 WARN L193 SmtUtils]: Spent 331.00 ms on a formula simplification that was a NOOP. DAG size: 171 [2020-10-27 05:13:56,097 WARN L193 SmtUtils]: Spent 271.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-27 05:13:56,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:13:56,512 INFO L93 Difference]: Finished difference Result 751 states and 1074 transitions. [2020-10-27 05:13:56,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 05:13:56,513 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 53 [2020-10-27 05:13:56,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:13:56,516 INFO L225 Difference]: With dead ends: 751 [2020-10-27 05:13:56,516 INFO L226 Difference]: Without dead ends: 540 [2020-10-27 05:13:56,517 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-10-27 05:13:56,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 540 states. [2020-10-27 05:13:56,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 540 to 518. [2020-10-27 05:13:56,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 518 states. [2020-10-27 05:13:56,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 518 states to 518 states and 735 transitions. [2020-10-27 05:13:56,610 INFO L78 Accepts]: Start accepts. Automaton has 518 states and 735 transitions. Word has length 53 [2020-10-27 05:13:56,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:13:56,611 INFO L481 AbstractCegarLoop]: Abstraction has 518 states and 735 transitions. [2020-10-27 05:13:56,611 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 05:13:56,611 INFO L276 IsEmpty]: Start isEmpty. Operand 518 states and 735 transitions. [2020-10-27 05:13:56,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-27 05:13:56,612 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:13:56,612 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] [2020-10-27 05:13:56,612 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 05:13:56,612 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:13:56,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:13:56,613 INFO L82 PathProgramCache]: Analyzing trace with hash -566053731, now seen corresponding path program 1 times [2020-10-27 05:13:56,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:13:56,613 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [344735080] [2020-10-27 05:13:56,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:13:56,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:13:56,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:56,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:56,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:56,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:57,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:57,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:57,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:57,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:00,307 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:14:00,308 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-27 05:14:00,308 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-27 05:14:00,308 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3667 [2020-10-27 05:14:00,308 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:14:00,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 05:14:00,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 05:14:00,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-27 05:14:00,308 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:14:00,728 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-27 05:14:00,729 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:14:00,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:14:00,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:00,744 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:14:00,744 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:14:00,744 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:14:00,744 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-27 05:14:00,745 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:14:00,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:14:00,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:14:00,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:14:00,745 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:14:00,765 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:14:00,765 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [344735080] [2020-10-27 05:14:00,766 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:14:00,766 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-27 05:14:00,766 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004048294] [2020-10-27 05:14:00,766 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 05:14:00,767 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:14:00,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 05:14:00,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-10-27 05:14:00,768 INFO L87 Difference]: Start difference. First operand 518 states and 735 transitions. Second operand 9 states. [2020-10-27 05:14:01,072 WARN L193 SmtUtils]: Spent 254.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-27 05:14:01,974 WARN L193 SmtUtils]: Spent 275.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-27 05:14:02,261 WARN L193 SmtUtils]: Spent 244.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-27 05:14:03,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:14:03,102 INFO L93 Difference]: Finished difference Result 1182 states and 1765 transitions. [2020-10-27 05:14:03,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 05:14:03,103 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 55 [2020-10-27 05:14:03,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:14:03,108 INFO L225 Difference]: With dead ends: 1182 [2020-10-27 05:14:03,108 INFO L226 Difference]: Without dead ends: 1166 [2020-10-27 05:14:03,109 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-10-27 05:14:03,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1166 states. [2020-10-27 05:14:03,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1166 to 504. [2020-10-27 05:14:03,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 504 states. [2020-10-27 05:14:03,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 504 states to 504 states and 717 transitions. [2020-10-27 05:14:03,209 INFO L78 Accepts]: Start accepts. Automaton has 504 states and 717 transitions. Word has length 55 [2020-10-27 05:14:03,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:14:03,210 INFO L481 AbstractCegarLoop]: Abstraction has 504 states and 717 transitions. [2020-10-27 05:14:03,210 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 05:14:03,210 INFO L276 IsEmpty]: Start isEmpty. Operand 504 states and 717 transitions. [2020-10-27 05:14:03,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-27 05:14:03,211 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:14:03,211 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] [2020-10-27 05:14:03,211 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 05:14:03,211 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:14:03,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:14:03,212 INFO L82 PathProgramCache]: Analyzing trace with hash 1612030871, now seen corresponding path program 1 times [2020-10-27 05:14:03,212 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:14:03,212 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [291368746] [2020-10-27 05:14:03,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:14:03,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:14:03,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:03,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:03,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:03,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:04,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:04,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:04,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:04,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:05,741 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:14:05,741 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-27 05:14:05,741 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-27 05:14:05,741 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2498 [2020-10-27 05:14:05,741 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:14:05,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 05:14:05,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 05:14:05,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-27 05:14:05,742 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:14:06,200 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 45 [2020-10-27 05:14:06,638 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-27 05:14:06,639 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:14:06,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:14:06,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:06,656 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:14:06,656 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:14:06,657 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:14:06,657 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 05:14:06,657 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:14:06,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:14:06,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:14:06,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:14:06,658 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:14:06,689 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:14:06,690 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [291368746] [2020-10-27 05:14:06,690 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:14:06,690 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2020-10-27 05:14:06,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058794987] [2020-10-27 05:14:06,691 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 05:14:06,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:14:06,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 05:14:06,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2020-10-27 05:14:06,692 INFO L87 Difference]: Start difference. First operand 504 states and 717 transitions. Second operand 15 states. [2020-10-27 05:14:06,901 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 76 [2020-10-27 05:14:07,820 WARN L193 SmtUtils]: Spent 854.00 ms on a formula simplification. DAG size of input: 233 DAG size of output: 228 [2020-10-27 05:14:08,296 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 70 [2020-10-27 05:14:09,857 WARN L193 SmtUtils]: Spent 320.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-10-27 05:14:10,232 WARN L193 SmtUtils]: Spent 330.00 ms on a formula simplification that was a NOOP. DAG size: 182 [2020-10-27 05:14:10,556 WARN L193 SmtUtils]: Spent 280.00 ms on a formula simplification that was a NOOP. DAG size: 176 [2020-10-27 05:14:10,934 WARN L193 SmtUtils]: Spent 319.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2020-10-27 05:14:11,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:14:11,708 INFO L93 Difference]: Finished difference Result 1048 states and 1536 transitions. [2020-10-27 05:14:11,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-27 05:14:11,709 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 55 [2020-10-27 05:14:11,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:14:11,714 INFO L225 Difference]: With dead ends: 1048 [2020-10-27 05:14:11,714 INFO L226 Difference]: Without dead ends: 880 [2020-10-27 05:14:11,716 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=192, Invalid=800, Unknown=0, NotChecked=0, Total=992 [2020-10-27 05:14:11,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 880 states. [2020-10-27 05:14:11,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 880 to 502. [2020-10-27 05:14:11,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 502 states. [2020-10-27 05:14:11,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 502 states to 502 states and 713 transitions. [2020-10-27 05:14:11,839 INFO L78 Accepts]: Start accepts. Automaton has 502 states and 713 transitions. Word has length 55 [2020-10-27 05:14:11,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:14:11,839 INFO L481 AbstractCegarLoop]: Abstraction has 502 states and 713 transitions. [2020-10-27 05:14:11,840 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 05:14:11,840 INFO L276 IsEmpty]: Start isEmpty. Operand 502 states and 713 transitions. [2020-10-27 05:14:11,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-27 05:14:11,840 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:14:11,841 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] [2020-10-27 05:14:11,841 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 05:14:11,841 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:14:11,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:14:11,841 INFO L82 PathProgramCache]: Analyzing trace with hash 1834091247, now seen corresponding path program 1 times [2020-10-27 05:14:11,842 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:14:11,842 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1327761668] [2020-10-27 05:14:11,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:14:11,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:14:11,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:11,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:12,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:12,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:12,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:12,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:12,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:12,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:14,084 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:14:14,084 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-27 05:14:14,084 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-27 05:14:14,084 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2218 [2020-10-27 05:14:14,084 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:14:14,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 05:14:14,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 05:14:14,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-27 05:14:14,085 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:14:14,739 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-27 05:14:14,741 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:14:14,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:14:14,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:14,756 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:14:14,756 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:14:14,756 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:14:14,756 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 05:14:14,756 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:14:14,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:14:14,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:14:14,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:14:14,757 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:14:14,781 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:14:14,782 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1327761668] [2020-10-27 05:14:14,782 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:14:14,782 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2020-10-27 05:14:14,782 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780727670] [2020-10-27 05:14:14,782 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 05:14:14,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:14:14,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 05:14:14,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2020-10-27 05:14:14,784 INFO L87 Difference]: Start difference. First operand 502 states and 713 transitions. Second operand 15 states. [2020-10-27 05:14:14,962 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 56 [2020-10-27 05:14:15,834 WARN L193 SmtUtils]: Spent 820.00 ms on a formula simplification. DAG size of input: 214 DAG size of output: 209 [2020-10-27 05:14:16,115 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 49 [2020-10-27 05:14:16,310 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 54 [2020-10-27 05:14:17,684 WARN L193 SmtUtils]: Spent 302.00 ms on a formula simplification that was a NOOP. DAG size: 174 [2020-10-27 05:14:18,012 WARN L193 SmtUtils]: Spent 270.00 ms on a formula simplification that was a NOOP. DAG size: 171 [2020-10-27 05:14:18,351 WARN L193 SmtUtils]: Spent 279.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-27 05:14:18,790 WARN L193 SmtUtils]: Spent 269.00 ms on a formula simplification that was a NOOP. DAG size: 173 [2020-10-27 05:14:19,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:14:19,681 INFO L93 Difference]: Finished difference Result 1531 states and 2293 transitions. [2020-10-27 05:14:19,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-27 05:14:19,682 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 55 [2020-10-27 05:14:19,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:14:19,690 INFO L225 Difference]: With dead ends: 1531 [2020-10-27 05:14:19,691 INFO L226 Difference]: Without dead ends: 1524 [2020-10-27 05:14:19,692 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=222, Invalid=900, Unknown=0, NotChecked=0, Total=1122 [2020-10-27 05:14:19,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1524 states. [2020-10-27 05:14:19,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1524 to 502. [2020-10-27 05:14:19,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 502 states. [2020-10-27 05:14:19,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 502 states to 502 states and 712 transitions. [2020-10-27 05:14:19,836 INFO L78 Accepts]: Start accepts. Automaton has 502 states and 712 transitions. Word has length 55 [2020-10-27 05:14:19,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:14:19,837 INFO L481 AbstractCegarLoop]: Abstraction has 502 states and 712 transitions. [2020-10-27 05:14:19,837 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 05:14:19,837 INFO L276 IsEmpty]: Start isEmpty. Operand 502 states and 712 transitions. [2020-10-27 05:14:19,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-27 05:14:19,838 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:14:19,838 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] [2020-10-27 05:14:19,838 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 05:14:19,839 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:14:19,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:14:19,839 INFO L82 PathProgramCache]: Analyzing trace with hash -1331034239, now seen corresponding path program 1 times [2020-10-27 05:14:19,839 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:14:19,840 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1187329777] [2020-10-27 05:14:19,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:14:19,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:14:19,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:19,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:20,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:20,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:20,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:20,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:20,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:21,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:21,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:21,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:21,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:22,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:22,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:22,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:22,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:23,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:23,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:23,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:23,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:24,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:24,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:24,878 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:14:24,878 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-27 05:14:24,878 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 21 [2020-10-27 05:14:24,878 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-27 05:14:24,878 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:14:24,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 05:14:24,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 05:14:24,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-27 05:14:24,879 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:14:25,254 WARN L193 SmtUtils]: Spent 260.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-27 05:14:25,255 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:14:25,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:14:25,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:25,267 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:14:25,267 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:14:25,267 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:14:25,268 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 05:14:25,268 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:14:25,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:14:25,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:14:25,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:14:25,268 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:14:25,279 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:14:25,279 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1187329777] [2020-10-27 05:14:25,280 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:14:25,280 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-27 05:14:25,280 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034529042] [2020-10-27 05:14:25,280 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 05:14:25,280 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:14:25,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 05:14:25,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-27 05:14:25,281 INFO L87 Difference]: Start difference. First operand 502 states and 712 transitions. Second operand 9 states. [2020-10-27 05:14:25,599 WARN L193 SmtUtils]: Spent 270.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2020-10-27 05:14:26,480 WARN L193 SmtUtils]: Spent 281.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-27 05:14:27,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:14:27,264 INFO L93 Difference]: Finished difference Result 1491 states and 2251 transitions. [2020-10-27 05:14:27,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 05:14:27,265 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 55 [2020-10-27 05:14:27,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:14:27,271 INFO L225 Difference]: With dead ends: 1491 [2020-10-27 05:14:27,271 INFO L226 Difference]: Without dead ends: 1154 [2020-10-27 05:14:27,272 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2020-10-27 05:14:27,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1154 states. [2020-10-27 05:14:27,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1154 to 492. [2020-10-27 05:14:27,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 492 states. [2020-10-27 05:14:27,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 492 states to 492 states and 700 transitions. [2020-10-27 05:14:27,397 INFO L78 Accepts]: Start accepts. Automaton has 492 states and 700 transitions. Word has length 55 [2020-10-27 05:14:27,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:14:27,397 INFO L481 AbstractCegarLoop]: Abstraction has 492 states and 700 transitions. [2020-10-27 05:14:27,397 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 05:14:27,397 INFO L276 IsEmpty]: Start isEmpty. Operand 492 states and 700 transitions. [2020-10-27 05:14:27,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-27 05:14:27,398 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:14:27,398 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] [2020-10-27 05:14:27,399 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 05:14:27,399 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:14:27,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:14:27,399 INFO L82 PathProgramCache]: Analyzing trace with hash -2011836099, now seen corresponding path program 1 times [2020-10-27 05:14:27,400 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:14:27,400 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [741717417] [2020-10-27 05:14:27,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:14:27,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:14:27,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:27,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:27,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:27,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:27,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:29,708 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:14:29,709 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-27 05:14:29,709 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 05:14:29,709 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2284 [2020-10-27 05:14:29,709 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:14:29,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 05:14:29,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:14:29,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-27 05:14:29,709 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:14:30,267 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-27 05:14:30,268 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:14:30,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:14:30,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:30,292 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:14:30,292 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:14:30,292 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:14:30,292 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-27 05:14:30,293 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:14:30,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:14:30,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:14:30,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:14:30,293 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:14:30,308 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:14:30,308 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [741717417] [2020-10-27 05:14:30,308 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:14:30,308 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-27 05:14:30,308 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689350902] [2020-10-27 05:14:30,309 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 05:14:30,309 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:14:30,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 05:14:30,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-10-27 05:14:30,310 INFO L87 Difference]: Start difference. First operand 492 states and 700 transitions. Second operand 11 states. [2020-10-27 05:14:31,001 WARN L193 SmtUtils]: Spent 587.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 179 [2020-10-27 05:14:32,268 WARN L193 SmtUtils]: Spent 283.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2020-10-27 05:14:32,631 WARN L193 SmtUtils]: Spent 272.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-27 05:14:34,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:14:34,768 INFO L93 Difference]: Finished difference Result 1953 states and 2909 transitions. [2020-10-27 05:14:34,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-27 05:14:34,768 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 56 [2020-10-27 05:14:34,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:14:34,774 INFO L225 Difference]: With dead ends: 1953 [2020-10-27 05:14:34,774 INFO L226 Difference]: Without dead ends: 1602 [2020-10-27 05:14:34,776 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=191, Invalid=621, Unknown=0, NotChecked=0, Total=812 [2020-10-27 05:14:34,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1602 states. [2020-10-27 05:14:34,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1602 to 492. [2020-10-27 05:14:34,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 492 states. [2020-10-27 05:14:34,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 492 states to 492 states and 699 transitions. [2020-10-27 05:14:34,909 INFO L78 Accepts]: Start accepts. Automaton has 492 states and 699 transitions. Word has length 56 [2020-10-27 05:14:34,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:14:34,909 INFO L481 AbstractCegarLoop]: Abstraction has 492 states and 699 transitions. [2020-10-27 05:14:34,909 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 05:14:34,909 INFO L276 IsEmpty]: Start isEmpty. Operand 492 states and 699 transitions. [2020-10-27 05:14:34,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-27 05:14:34,910 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:14:34,910 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] [2020-10-27 05:14:34,910 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 05:14:34,910 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:14:34,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:14:34,911 INFO L82 PathProgramCache]: Analyzing trace with hash 2128026737, now seen corresponding path program 1 times [2020-10-27 05:14:34,911 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:14:34,911 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1453163680] [2020-10-27 05:14:34,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:14:34,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:14:34,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:35,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:35,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:35,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:35,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:37,113 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:14:37,114 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-27 05:14:37,114 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 05:14:37,114 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2179 [2020-10-27 05:14:37,114 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:14:37,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 05:14:37,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:14:37,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-27 05:14:37,114 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:14:37,504 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-27 05:14:37,504 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:14:37,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:14:37,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:37,524 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:14:37,524 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:14:37,525 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:14:37,525 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-27 05:14:37,525 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:14:37,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:14:37,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:14:37,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:14:37,525 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:14:37,541 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:14:37,541 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1453163680] [2020-10-27 05:14:37,541 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:14:37,541 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-10-27 05:14:37,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637287437] [2020-10-27 05:14:37,542 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 05:14:37,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:14:37,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 05:14:37,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-10-27 05:14:37,543 INFO L87 Difference]: Start difference. First operand 492 states and 699 transitions. Second operand 12 states. [2020-10-27 05:14:37,899 WARN L193 SmtUtils]: Spent 286.00 ms on a formula simplification that was a NOOP. DAG size: 177 [2020-10-27 05:14:39,090 WARN L193 SmtUtils]: Spent 289.00 ms on a formula simplification that was a NOOP. DAG size: 179 [2020-10-27 05:14:39,439 WARN L193 SmtUtils]: Spent 280.00 ms on a formula simplification that was a NOOP. DAG size: 176 [2020-10-27 05:14:40,751 WARN L193 SmtUtils]: Spent 294.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-27 05:14:41,099 WARN L193 SmtUtils]: Spent 285.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-27 05:14:41,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:14:41,493 INFO L93 Difference]: Finished difference Result 1807 states and 2682 transitions. [2020-10-27 05:14:41,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-27 05:14:41,494 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 56 [2020-10-27 05:14:41,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:14:41,500 INFO L225 Difference]: With dead ends: 1807 [2020-10-27 05:14:41,501 INFO L226 Difference]: Without dead ends: 1799 [2020-10-27 05:14:41,502 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=315, Invalid=1017, Unknown=0, NotChecked=0, Total=1332 [2020-10-27 05:14:41,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1799 states. [2020-10-27 05:14:41,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1799 to 492. [2020-10-27 05:14:41,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 492 states. [2020-10-27 05:14:41,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 492 states to 492 states and 698 transitions. [2020-10-27 05:14:41,644 INFO L78 Accepts]: Start accepts. Automaton has 492 states and 698 transitions. Word has length 56 [2020-10-27 05:14:41,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:14:41,645 INFO L481 AbstractCegarLoop]: Abstraction has 492 states and 698 transitions. [2020-10-27 05:14:41,645 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 05:14:41,645 INFO L276 IsEmpty]: Start isEmpty. Operand 492 states and 698 transitions. [2020-10-27 05:14:41,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-27 05:14:41,645 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:14:41,646 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] [2020-10-27 05:14:41,646 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 05:14:41,646 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:14:41,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:14:41,646 INFO L82 PathProgramCache]: Analyzing trace with hash -415900144, now seen corresponding path program 1 times [2020-10-27 05:14:41,647 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:14:41,647 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [47006567] [2020-10-27 05:14:41,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:14:41,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:14:41,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:41,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:41,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:42,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:42,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:42,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:42,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:42,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:42,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:43,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:43,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:43,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:43,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:43,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:43,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:44,985 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:14:44,985 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-27 05:14:44,985 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-27 05:14:44,985 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3312 [2020-10-27 05:14:44,985 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:14:44,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 05:14:44,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 05:14:44,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-27 05:14:44,986 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:14:45,345 WARN L193 SmtUtils]: Spent 246.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-27 05:14:45,346 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:14:45,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:14:45,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:45,361 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:14:45,362 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:14:45,362 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:14:45,362 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 05:14:45,362 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:14:45,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:14:45,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:14:45,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:14:45,363 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:14:45,379 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:14:45,379 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [47006567] [2020-10-27 05:14:45,380 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:14:45,380 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-27 05:14:45,380 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137140603] [2020-10-27 05:14:45,380 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 05:14:45,380 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:14:45,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 05:14:45,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-27 05:14:45,381 INFO L87 Difference]: Start difference. First operand 492 states and 698 transitions. Second operand 8 states. [2020-10-27 05:14:45,728 WARN L193 SmtUtils]: Spent 287.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-27 05:14:46,401 WARN L193 SmtUtils]: Spent 290.00 ms on a formula simplification that was a NOOP. DAG size: 171 [2020-10-27 05:14:47,052 WARN L193 SmtUtils]: Spent 273.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-27 05:14:47,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:14:47,061 INFO L93 Difference]: Finished difference Result 822 states and 1210 transitions. [2020-10-27 05:14:47,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 05:14:47,062 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 56 [2020-10-27 05:14:47,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:14:47,064 INFO L225 Difference]: With dead ends: 822 [2020-10-27 05:14:47,064 INFO L226 Difference]: Without dead ends: 469 [2020-10-27 05:14:47,065 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-10-27 05:14:47,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 469 states. [2020-10-27 05:14:47,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 469 to 466. [2020-10-27 05:14:47,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 466 states. [2020-10-27 05:14:47,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 466 states to 466 states and 665 transitions. [2020-10-27 05:14:47,180 INFO L78 Accepts]: Start accepts. Automaton has 466 states and 665 transitions. Word has length 56 [2020-10-27 05:14:47,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:14:47,181 INFO L481 AbstractCegarLoop]: Abstraction has 466 states and 665 transitions. [2020-10-27 05:14:47,181 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 05:14:47,181 INFO L276 IsEmpty]: Start isEmpty. Operand 466 states and 665 transitions. [2020-10-27 05:14:47,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-27 05:14:47,182 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:14:47,182 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] [2020-10-27 05:14:47,182 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-27 05:14:47,182 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:14:47,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:14:47,182 INFO L82 PathProgramCache]: Analyzing trace with hash 738110924, now seen corresponding path program 1 times [2020-10-27 05:14:47,183 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:14:47,183 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1092525930] [2020-10-27 05:14:47,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:14:47,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:14:47,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:47,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:47,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:47,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:48,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:48,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:49,853 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:14:49,854 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-27 05:14:49,854 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 05:14:49,854 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2648 [2020-10-27 05:14:49,854 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:14:49,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 05:14:49,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:14:49,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-27 05:14:49,854 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:14:50,223 WARN L193 SmtUtils]: Spent 262.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-27 05:14:50,224 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:14:50,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:14:50,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:50,253 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:14:50,254 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:14:50,254 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:14:50,254 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-27 05:14:50,254 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:14:50,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:14:50,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:14:50,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:14:50,255 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:14:50,272 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:14:50,272 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1092525930] [2020-10-27 05:14:50,273 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:14:50,273 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-27 05:14:50,273 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920470478] [2020-10-27 05:14:50,273 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 05:14:50,273 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:14:50,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 05:14:50,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-10-27 05:14:50,274 INFO L87 Difference]: Start difference. First operand 466 states and 665 transitions. Second operand 10 states. [2020-10-27 05:14:50,648 WARN L193 SmtUtils]: Spent 295.00 ms on a formula simplification that was a NOOP. DAG size: 176 [2020-10-27 05:14:51,523 WARN L193 SmtUtils]: Spent 271.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2020-10-27 05:14:51,865 WARN L193 SmtUtils]: Spent 290.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-27 05:14:52,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:14:52,610 INFO L93 Difference]: Finished difference Result 997 states and 1473 transitions. [2020-10-27 05:14:52,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-27 05:14:52,611 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 57 [2020-10-27 05:14:52,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:14:52,614 INFO L225 Difference]: With dead ends: 997 [2020-10-27 05:14:52,614 INFO L226 Difference]: Without dead ends: 646 [2020-10-27 05:14:52,615 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=148, Invalid=404, Unknown=0, NotChecked=0, Total=552 [2020-10-27 05:14:52,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 646 states. [2020-10-27 05:14:52,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 646 to 466. [2020-10-27 05:14:52,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 466 states. [2020-10-27 05:14:52,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 466 states to 466 states and 664 transitions. [2020-10-27 05:14:52,754 INFO L78 Accepts]: Start accepts. Automaton has 466 states and 664 transitions. Word has length 57 [2020-10-27 05:14:52,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:14:52,755 INFO L481 AbstractCegarLoop]: Abstraction has 466 states and 664 transitions. [2020-10-27 05:14:52,755 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 05:14:52,755 INFO L276 IsEmpty]: Start isEmpty. Operand 466 states and 664 transitions. [2020-10-27 05:14:52,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-27 05:14:52,755 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:14:52,756 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] [2020-10-27 05:14:52,756 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-27 05:14:52,756 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:14:52,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:14:52,756 INFO L82 PathProgramCache]: Analyzing trace with hash 1756918882, now seen corresponding path program 1 times [2020-10-27 05:14:52,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:14:52,757 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [819457831] [2020-10-27 05:14:52,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:14:52,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:14:52,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:52,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:52,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:53,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:53,888 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:14:53,889 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-27 05:14:53,889 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 05:14:53,889 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1106 [2020-10-27 05:14:53,889 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:14:53,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 05:14:53,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 05:14:53,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-27 05:14:53,889 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:14:54,239 WARN L193 SmtUtils]: Spent 246.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-27 05:14:54,240 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:14:54,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:14:54,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:54,255 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:14:54,256 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:14:54,256 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:14:54,256 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 05:14:54,256 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:14:54,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:14:54,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:14:54,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:14:54,256 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:14:54,266 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:14:54,267 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [819457831] [2020-10-27 05:14:54,267 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:14:54,267 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-27 05:14:54,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251199704] [2020-10-27 05:14:54,267 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 05:14:54,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:14:54,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 05:14:54,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-27 05:14:54,268 INFO L87 Difference]: Start difference. First operand 466 states and 664 transitions. Second operand 9 states. [2020-10-27 05:14:54,569 WARN L193 SmtUtils]: Spent 252.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2020-10-27 05:14:55,711 WARN L193 SmtUtils]: Spent 257.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-27 05:14:55,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:14:55,720 INFO L93 Difference]: Finished difference Result 471 states and 667 transitions. [2020-10-27 05:14:55,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 05:14:55,722 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 58 [2020-10-27 05:14:55,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:14:55,724 INFO L225 Difference]: With dead ends: 471 [2020-10-27 05:14:55,724 INFO L226 Difference]: Without dead ends: 464 [2020-10-27 05:14:55,725 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2020-10-27 05:14:55,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 464 states. [2020-10-27 05:14:55,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 464 to 461. [2020-10-27 05:14:55,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 461 states. [2020-10-27 05:14:55,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 461 states to 461 states and 655 transitions. [2020-10-27 05:14:55,837 INFO L78 Accepts]: Start accepts. Automaton has 461 states and 655 transitions. Word has length 58 [2020-10-27 05:14:55,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:14:55,837 INFO L481 AbstractCegarLoop]: Abstraction has 461 states and 655 transitions. [2020-10-27 05:14:55,837 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 05:14:55,837 INFO L276 IsEmpty]: Start isEmpty. Operand 461 states and 655 transitions. [2020-10-27 05:14:55,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-27 05:14:55,838 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:14:55,839 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] [2020-10-27 05:14:55,839 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-27 05:14:55,839 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:14:55,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:14:55,839 INFO L82 PathProgramCache]: Analyzing trace with hash 500515459, now seen corresponding path program 1 times [2020-10-27 05:14:55,840 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:14:55,840 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [352060820] [2020-10-27 05:14:55,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:14:55,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:14:55,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:55,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:55,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:55,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:56,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:56,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:57,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:57,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:57,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:57,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:57,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:00,865 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:15:00,865 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-27 05:15:00,865 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-27 05:15:00,865 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-27 05:15:00,865 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:15:00,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 05:15:00,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:15:00,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-27 05:15:00,865 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:15:01,308 WARN L193 SmtUtils]: Spent 246.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-27 05:15:01,309 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:15:01,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:15:01,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:01,333 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:15:01,333 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:15:01,333 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:15:01,333 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-27 05:15:01,333 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:15:01,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:15:01,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:15:01,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:15:01,334 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:15:01,353 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:15:01,354 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [352060820] [2020-10-27 05:15:01,354 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:15:01,354 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-10-27 05:15:01,354 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636738223] [2020-10-27 05:15:01,355 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 05:15:01,355 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:15:01,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 05:15:01,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2020-10-27 05:15:01,355 INFO L87 Difference]: Start difference. First operand 461 states and 655 transitions. Second operand 12 states. [2020-10-27 05:15:02,119 WARN L193 SmtUtils]: Spent 653.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 181 [2020-10-27 05:15:05,579 WARN L193 SmtUtils]: Spent 575.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 179 [2020-10-27 05:15:05,930 WARN L193 SmtUtils]: Spent 262.00 ms on a formula simplification that was a NOOP. DAG size: 173 [2020-10-27 05:15:06,600 WARN L193 SmtUtils]: Spent 642.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 184 [2020-10-27 05:15:06,991 WARN L193 SmtUtils]: Spent 303.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2020-10-27 05:15:07,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:15:07,399 INFO L93 Difference]: Finished difference Result 1939 states and 2895 transitions. [2020-10-27 05:15:07,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-27 05:15:07,400 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 76 [2020-10-27 05:15:07,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:15:07,406 INFO L225 Difference]: With dead ends: 1939 [2020-10-27 05:15:07,406 INFO L226 Difference]: Without dead ends: 1762 [2020-10-27 05:15:07,407 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 377 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=331, Invalid=1075, Unknown=0, NotChecked=0, Total=1406 [2020-10-27 05:15:07,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1762 states. [2020-10-27 05:15:07,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1762 to 461. [2020-10-27 05:15:07,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 461 states. [2020-10-27 05:15:07,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 461 states to 461 states and 653 transitions. [2020-10-27 05:15:07,543 INFO L78 Accepts]: Start accepts. Automaton has 461 states and 653 transitions. Word has length 76 [2020-10-27 05:15:07,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:15:07,543 INFO L481 AbstractCegarLoop]: Abstraction has 461 states and 653 transitions. [2020-10-27 05:15:07,543 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 05:15:07,543 INFO L276 IsEmpty]: Start isEmpty. Operand 461 states and 653 transitions. [2020-10-27 05:15:07,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-27 05:15:07,544 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:15:07,545 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] [2020-10-27 05:15:07,545 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-27 05:15:07,545 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:15:07,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:15:07,545 INFO L82 PathProgramCache]: Analyzing trace with hash 26966743, now seen corresponding path program 1 times [2020-10-27 05:15:07,546 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:15:07,546 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [162609016] [2020-10-27 05:15:07,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:15:07,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:15:07,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:07,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:07,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:07,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:07,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:08,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:08,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:08,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:08,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:10,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:12,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:12,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:12,567 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:15:12,568 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-27 05:15:12,568 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-27 05:15:12,568 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-27 05:15:12,568 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:15:12,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 05:15:12,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:15:12,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-27 05:15:12,568 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:15:12,847 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-27 05:15:12,848 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:15:12,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:15:12,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:12,867 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:15:12,868 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:15:12,868 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:15:12,868 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-27 05:15:12,868 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:15:12,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:15:12,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:15:12,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:15:12,868 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:15:12,888 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:15:12,888 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [162609016] [2020-10-27 05:15:12,888 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:15:12,888 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:15:12,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136569414] [2020-10-27 05:15:12,889 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 05:15:12,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:15:12,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 05:15:12,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:15:12,889 INFO L87 Difference]: Start difference. First operand 461 states and 653 transitions. Second operand 6 states. [2020-10-27 05:15:13,196 WARN L193 SmtUtils]: Spent 262.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2020-10-27 05:15:13,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:15:13,698 INFO L93 Difference]: Finished difference Result 780 states and 1155 transitions. [2020-10-27 05:15:13,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 05:15:13,698 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 77 [2020-10-27 05:15:13,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:15:13,700 INFO L225 Difference]: With dead ends: 780 [2020-10-27 05:15:13,700 INFO L226 Difference]: Without dead ends: 453 [2020-10-27 05:15:13,701 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-10-27 05:15:13,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2020-10-27 05:15:13,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 255. [2020-10-27 05:15:13,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 255 states. [2020-10-27 05:15:13,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 351 transitions. [2020-10-27 05:15:13,801 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 351 transitions. Word has length 77 [2020-10-27 05:15:13,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:15:13,801 INFO L481 AbstractCegarLoop]: Abstraction has 255 states and 351 transitions. [2020-10-27 05:15:13,801 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 05:15:13,801 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 351 transitions. [2020-10-27 05:15:13,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-27 05:15:13,802 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:15:13,802 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] [2020-10-27 05:15:13,803 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-27 05:15:13,803 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:15:13,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:15:13,803 INFO L82 PathProgramCache]: Analyzing trace with hash -1113384968, now seen corresponding path program 1 times [2020-10-27 05:15:13,803 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:15:13,804 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [707958530] [2020-10-27 05:15:13,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:15:13,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:15:13,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:13,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:13,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:14,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:14,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:14,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:14,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:14,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:14,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:14,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:18,144 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:15:18,144 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-27 05:15:18,144 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-27 05:15:18,144 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4316 [2020-10-27 05:15:18,144 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:15:18,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 05:15:18,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:15:18,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-27 05:15:18,145 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:15:18,588 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-27 05:15:18,589 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:15:18,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:15:18,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:18,609 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:15:18,610 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:15:18,610 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:15:18,610 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-27 05:15:18,610 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:15:18,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:15:18,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:15:18,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:15:18,610 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:15:18,631 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:15:18,632 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [707958530] [2020-10-27 05:15:18,632 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:15:18,632 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2020-10-27 05:15:18,632 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582757962] [2020-10-27 05:15:18,632 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 05:15:18,632 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:15:18,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 05:15:18,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2020-10-27 05:15:18,633 INFO L87 Difference]: Start difference. First operand 255 states and 351 transitions. Second operand 14 states. [2020-10-27 05:15:19,432 WARN L193 SmtUtils]: Spent 680.00 ms on a formula simplification. DAG size of input: 184 DAG size of output: 183 [2020-10-27 05:15:22,305 WARN L193 SmtUtils]: Spent 259.00 ms on a formula simplification that was a NOOP. DAG size: 171 [2020-10-27 05:15:22,657 WARN L193 SmtUtils]: Spent 279.00 ms on a formula simplification that was a NOOP. DAG size: 173 [2020-10-27 05:15:23,306 WARN L193 SmtUtils]: Spent 588.00 ms on a formula simplification. DAG size of input: 175 DAG size of output: 174 [2020-10-27 05:15:23,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:15:23,317 INFO L93 Difference]: Finished difference Result 656 states and 937 transitions. [2020-10-27 05:15:23,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-27 05:15:23,318 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 77 [2020-10-27 05:15:23,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:15:23,321 INFO L225 Difference]: With dead ends: 656 [2020-10-27 05:15:23,321 INFO L226 Difference]: Without dead ends: 483 [2020-10-27 05:15:23,322 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=312, Invalid=1094, Unknown=0, NotChecked=0, Total=1406 [2020-10-27 05:15:23,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 483 states. [2020-10-27 05:15:23,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 483 to 255. [2020-10-27 05:15:23,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 255 states. [2020-10-27 05:15:23,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 350 transitions. [2020-10-27 05:15:23,400 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 350 transitions. Word has length 77 [2020-10-27 05:15:23,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:15:23,401 INFO L481 AbstractCegarLoop]: Abstraction has 255 states and 350 transitions. [2020-10-27 05:15:23,401 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 05:15:23,401 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 350 transitions. [2020-10-27 05:15:23,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-27 05:15:23,401 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:15:23,401 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] [2020-10-27 05:15:23,402 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-27 05:15:23,402 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:15:23,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:15:23,402 INFO L82 PathProgramCache]: Analyzing trace with hash 68743103, now seen corresponding path program 1 times [2020-10-27 05:15:23,402 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:15:23,402 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [236680009] [2020-10-27 05:15:23,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:15:23,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:15:23,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:23,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:23,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:23,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:23,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:23,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:23,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:24,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:24,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:28,428 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:15:28,428 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-27 05:15:28,429 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-27 05:15:28,429 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-27 05:15:28,429 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:15:28,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 05:15:28,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 05:15:28,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-27 05:15:28,429 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:15:29,326 WARN L193 SmtUtils]: Spent 234.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-27 05:15:29,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:15:29,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:15:29,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:29,340 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:15:29,340 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:15:29,340 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:15:29,341 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 05:15:29,341 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:15:29,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:15:29,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:15:29,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:15:29,341 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:15:29,379 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:15:29,379 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [236680009] [2020-10-27 05:15:29,380 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:15:29,380 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2020-10-27 05:15:29,380 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349052350] [2020-10-27 05:15:29,381 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 05:15:29,381 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:15:29,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 05:15:29,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2020-10-27 05:15:29,382 INFO L87 Difference]: Start difference. First operand 255 states and 350 transitions. Second operand 15 states. [2020-10-27 05:15:29,552 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 63 [2020-10-27 05:15:30,465 WARN L193 SmtUtils]: Spent 848.00 ms on a formula simplification. DAG size of input: 217 DAG size of output: 214 [2020-10-27 05:15:30,823 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 51 [2020-10-27 05:15:33,659 WARN L193 SmtUtils]: Spent 262.00 ms on a formula simplification that was a NOOP. DAG size: 171 [2020-10-27 05:15:33,978 WARN L193 SmtUtils]: Spent 276.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-27 05:15:34,388 WARN L193 SmtUtils]: Spent 298.00 ms on a formula simplification that was a NOOP. DAG size: 173 [2020-10-27 05:15:34,760 WARN L193 SmtUtils]: Spent 302.00 ms on a formula simplification that was a NOOP. DAG size: 174 [2020-10-27 05:15:34,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:15:34,804 INFO L93 Difference]: Finished difference Result 686 states and 989 transitions. [2020-10-27 05:15:34,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-27 05:15:34,805 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 78 [2020-10-27 05:15:34,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:15:34,808 INFO L225 Difference]: With dead ends: 686 [2020-10-27 05:15:34,808 INFO L226 Difference]: Without dead ends: 635 [2020-10-27 05:15:34,808 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=137, Invalid=619, Unknown=0, NotChecked=0, Total=756 [2020-10-27 05:15:34,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 635 states. [2020-10-27 05:15:34,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 635 to 265. [2020-10-27 05:15:34,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 265 states. [2020-10-27 05:15:34,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 361 transitions. [2020-10-27 05:15:34,892 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 361 transitions. Word has length 78 [2020-10-27 05:15:34,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:15:34,892 INFO L481 AbstractCegarLoop]: Abstraction has 265 states and 361 transitions. [2020-10-27 05:15:34,892 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 05:15:34,892 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 361 transitions. [2020-10-27 05:15:34,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-27 05:15:34,893 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:15:34,893 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] [2020-10-27 05:15:34,893 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-27 05:15:34,893 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:15:34,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:15:34,893 INFO L82 PathProgramCache]: Analyzing trace with hash 1428269320, now seen corresponding path program 1 times [2020-10-27 05:15:34,894 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:15:34,894 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1478218860] [2020-10-27 05:15:34,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:15:34,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:15:34,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:34,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:34,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:35,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:35,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:35,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:35,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:36,146 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:15:36,146 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-27 05:15:36,146 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 05:15:36,146 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1229 [2020-10-27 05:15:36,146 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:15:36,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 05:15:36,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 05:15:36,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-27 05:15:36,146 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:15:36,451 WARN L193 SmtUtils]: Spent 252.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-27 05:15:36,452 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:15:36,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:15:36,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:36,463 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:15:36,464 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:15:36,464 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:15:36,464 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 05:15:36,464 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:15:36,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:15:36,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:15:36,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:15:36,464 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:15:36,496 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:15:36,496 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1478218860] [2020-10-27 05:15:36,497 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:15:36,497 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 05:15:36,497 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108352987] [2020-10-27 05:15:36,497 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 05:15:36,497 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:15:36,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 05:15:36,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:15:36,498 INFO L87 Difference]: Start difference. First operand 265 states and 361 transitions. Second operand 6 states. [2020-10-27 05:15:36,831 WARN L193 SmtUtils]: Spent 281.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-27 05:15:37,798 WARN L193 SmtUtils]: Spent 277.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2020-10-27 05:15:38,083 WARN L193 SmtUtils]: Spent 263.00 ms on a formula simplification that was a NOOP. DAG size: 165 [2020-10-27 05:15:38,429 WARN L193 SmtUtils]: Spent 273.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2020-10-27 05:15:38,736 WARN L193 SmtUtils]: Spent 265.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-27 05:15:38,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:15:38,909 INFO L93 Difference]: Finished difference Result 1267 states and 1909 transitions. [2020-10-27 05:15:38,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 05:15:38,913 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 79 [2020-10-27 05:15:38,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:15:38,917 INFO L225 Difference]: With dead ends: 1267 [2020-10-27 05:15:38,917 INFO L226 Difference]: Without dead ends: 1100 [2020-10-27 05:15:38,918 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 [2020-10-27 05:15:38,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1100 states. [2020-10-27 05:15:39,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1100 to 429. [2020-10-27 05:15:39,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 429 states. [2020-10-27 05:15:39,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429 states to 429 states and 609 transitions. [2020-10-27 05:15:39,074 INFO L78 Accepts]: Start accepts. Automaton has 429 states and 609 transitions. Word has length 79 [2020-10-27 05:15:39,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:15:39,074 INFO L481 AbstractCegarLoop]: Abstraction has 429 states and 609 transitions. [2020-10-27 05:15:39,074 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 05:15:39,074 INFO L276 IsEmpty]: Start isEmpty. Operand 429 states and 609 transitions. [2020-10-27 05:15:39,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-27 05:15:39,075 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:15:39,075 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] [2020-10-27 05:15:39,076 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-27 05:15:39,076 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:15:39,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:15:39,076 INFO L82 PathProgramCache]: Analyzing trace with hash -1268097800, now seen corresponding path program 1 times [2020-10-27 05:15:39,076 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:15:39,076 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [738182043] [2020-10-27 05:15:39,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:15:39,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:15:39,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:39,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:39,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:39,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:39,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:39,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:39,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:40,289 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:15:40,290 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-27 05:15:40,290 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 05:15:40,290 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1190 [2020-10-27 05:15:40,290 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:15:40,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 05:15:40,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 05:15:40,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 69 [2020-10-27 05:15:40,290 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:15:40,623 WARN L193 SmtUtils]: Spent 244.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-27 05:15:40,624 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:15:40,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:15:40,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:40,635 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:15:40,636 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:15:40,636 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:15:40,636 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 05:15:40,636 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:15:40,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:15:40,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:15:40,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:15:40,636 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:15:40,656 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:15:40,656 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [738182043] [2020-10-27 05:15:40,656 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:15:40,657 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:15:40,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347890267] [2020-10-27 05:15:40,657 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 05:15:40,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:15:40,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 05:15:40,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 05:15:40,658 INFO L87 Difference]: Start difference. First operand 429 states and 609 transitions. Second operand 5 states. [2020-10-27 05:15:41,025 WARN L193 SmtUtils]: Spent 312.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-27 05:15:41,989 WARN L193 SmtUtils]: Spent 286.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2020-10-27 05:15:42,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:15:42,060 INFO L93 Difference]: Finished difference Result 1047 states and 1545 transitions. [2020-10-27 05:15:42,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 05:15:42,060 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 81 [2020-10-27 05:15:42,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:15:42,063 INFO L225 Difference]: With dead ends: 1047 [2020-10-27 05:15:42,063 INFO L226 Difference]: Without dead ends: 716 [2020-10-27 05:15:42,064 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-10-27 05:15:42,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 716 states. [2020-10-27 05:15:42,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 716 to 705. [2020-10-27 05:15:42,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 705 states. [2020-10-27 05:15:42,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 705 states to 705 states and 1009 transitions. [2020-10-27 05:15:42,297 INFO L78 Accepts]: Start accepts. Automaton has 705 states and 1009 transitions. Word has length 81 [2020-10-27 05:15:42,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:15:42,297 INFO L481 AbstractCegarLoop]: Abstraction has 705 states and 1009 transitions. [2020-10-27 05:15:42,297 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 05:15:42,298 INFO L276 IsEmpty]: Start isEmpty. Operand 705 states and 1009 transitions. [2020-10-27 05:15:42,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-27 05:15:42,299 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:15:42,299 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] [2020-10-27 05:15:42,300 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-27 05:15:42,300 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:15:42,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:15:42,300 INFO L82 PathProgramCache]: Analyzing trace with hash 793201072, now seen corresponding path program 1 times [2020-10-27 05:15:42,300 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:15:42,301 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [53769654] [2020-10-27 05:15:42,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:15:42,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:15:42,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:42,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:42,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:42,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:42,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:43,337 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:15:43,337 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-27 05:15:43,337 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 05:15:43,337 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1011 [2020-10-27 05:15:43,337 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:15:43,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 05:15:43,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 05:15:43,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-27 05:15:43,337 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:15:43,678 WARN L193 SmtUtils]: Spent 254.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-27 05:15:43,679 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:15:43,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:15:43,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:43,690 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:15:43,690 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:15:43,691 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:15:43,691 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 05:15:43,691 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:15:43,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:15:43,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:15:43,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:15:43,691 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:15:43,711 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:15:43,711 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [53769654] [2020-10-27 05:15:43,711 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:15:43,711 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 05:15:43,711 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625551228] [2020-10-27 05:15:43,712 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 05:15:43,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:15:43,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 05:15:43,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:15:43,713 INFO L87 Difference]: Start difference. First operand 705 states and 1009 transitions. Second operand 6 states. [2020-10-27 05:15:44,081 WARN L193 SmtUtils]: Spent 307.00 ms on a formula simplification that was a NOOP. DAG size: 174 [2020-10-27 05:15:45,222 WARN L193 SmtUtils]: Spent 302.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-27 05:15:45,515 WARN L193 SmtUtils]: Spent 270.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-27 05:15:45,910 WARN L193 SmtUtils]: Spent 291.00 ms on a formula simplification that was a NOOP. DAG size: 171 [2020-10-27 05:15:46,231 WARN L193 SmtUtils]: Spent 280.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-27 05:15:46,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:15:46,506 INFO L93 Difference]: Finished difference Result 2259 states and 3333 transitions. [2020-10-27 05:15:46,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 05:15:46,507 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 81 [2020-10-27 05:15:46,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:15:46,514 INFO L225 Difference]: With dead ends: 2259 [2020-10-27 05:15:46,514 INFO L226 Difference]: Without dead ends: 1652 [2020-10-27 05:15:46,516 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2020-10-27 05:15:46,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1652 states. [2020-10-27 05:15:46,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1652 to 705. [2020-10-27 05:15:46,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 705 states. [2020-10-27 05:15:46,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 705 states to 705 states and 1001 transitions. [2020-10-27 05:15:46,779 INFO L78 Accepts]: Start accepts. Automaton has 705 states and 1001 transitions. Word has length 81 [2020-10-27 05:15:46,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:15:46,779 INFO L481 AbstractCegarLoop]: Abstraction has 705 states and 1001 transitions. [2020-10-27 05:15:46,779 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 05:15:46,779 INFO L276 IsEmpty]: Start isEmpty. Operand 705 states and 1001 transitions. [2020-10-27 05:15:46,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-27 05:15:46,781 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:15:46,781 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] [2020-10-27 05:15:46,781 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-27 05:15:46,781 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:15:46,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:15:46,782 INFO L82 PathProgramCache]: Analyzing trace with hash 1381844479, now seen corresponding path program 1 times [2020-10-27 05:15:46,782 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:15:46,782 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1165269669] [2020-10-27 05:15:46,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:15:46,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:15:46,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:46,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:46,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:46,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:46,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:47,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:47,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:47,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:47,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:47,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:47,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:48,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:48,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:50,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:50,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:50,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:51,808 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:15:51,809 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-27 05:15:51,809 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-27 05:15:51,809 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-27 05:15:51,809 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:15:51,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 05:15:51,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:15:51,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-27 05:15:51,809 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:15:52,735 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-27 05:15:52,736 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:15:52,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:15:52,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:52,754 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:15:52,754 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:15:52,754 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:15:52,754 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-27 05:15:52,754 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:15:52,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:15:52,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:15:52,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:15:52,755 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:15:52,791 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:15:52,791 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1165269669] [2020-10-27 05:15:52,792 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:15:52,792 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2020-10-27 05:15:52,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40635887] [2020-10-27 05:15:52,792 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 05:15:52,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:15:52,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 05:15:52,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2020-10-27 05:15:52,793 INFO L87 Difference]: Start difference. First operand 705 states and 1001 transitions. Second operand 16 states. [2020-10-27 05:15:53,662 WARN L193 SmtUtils]: Spent 699.00 ms on a formula simplification. DAG size of input: 186 DAG size of output: 183 [2020-10-27 05:15:53,942 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 36 [2020-10-27 05:15:54,156 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 39 [2020-10-27 05:15:54,339 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 39 [2020-10-27 05:15:54,767 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 43 [2020-10-27 05:15:59,239 WARN L193 SmtUtils]: Spent 598.00 ms on a formula simplification. DAG size of input: 192 DAG size of output: 177 [2020-10-27 05:15:59,534 WARN L193 SmtUtils]: Spent 250.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2020-10-27 05:16:00,221 WARN L193 SmtUtils]: Spent 630.00 ms on a formula simplification. DAG size of input: 184 DAG size of output: 182 [2020-10-27 05:16:00,938 WARN L193 SmtUtils]: Spent 574.00 ms on a formula simplification. DAG size of input: 190 DAG size of output: 175 [2020-10-27 05:16:02,984 WARN L193 SmtUtils]: Spent 677.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 185 [2020-10-27 05:16:03,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:16:03,288 INFO L93 Difference]: Finished difference Result 4625 states and 6792 transitions. [2020-10-27 05:16:03,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-27 05:16:03,289 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 81 [2020-10-27 05:16:03,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:16:03,306 INFO L225 Difference]: With dead ends: 4625 [2020-10-27 05:16:03,306 INFO L226 Difference]: Without dead ends: 4320 [2020-10-27 05:16:03,309 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 454 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=395, Invalid=1411, Unknown=0, NotChecked=0, Total=1806 [2020-10-27 05:16:03,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4320 states. [2020-10-27 05:16:03,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4320 to 1547. [2020-10-27 05:16:03,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1547 states. [2020-10-27 05:16:03,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1547 states to 1547 states and 2217 transitions. [2020-10-27 05:16:03,886 INFO L78 Accepts]: Start accepts. Automaton has 1547 states and 2217 transitions. Word has length 81 [2020-10-27 05:16:03,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:16:03,886 INFO L481 AbstractCegarLoop]: Abstraction has 1547 states and 2217 transitions. [2020-10-27 05:16:03,887 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 05:16:03,887 INFO L276 IsEmpty]: Start isEmpty. Operand 1547 states and 2217 transitions. [2020-10-27 05:16:03,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-27 05:16:03,889 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:16:03,889 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] [2020-10-27 05:16:03,889 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-27 05:16:03,889 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:16:03,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:16:03,890 INFO L82 PathProgramCache]: Analyzing trace with hash -1037973505, now seen corresponding path program 1 times [2020-10-27 05:16:03,890 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:16:03,890 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1573198735] [2020-10-27 05:16:03,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:16:03,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:16:03,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:16:03,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:16:04,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:16:04,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:16:04,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:16:04,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:16:04,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:16:04,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:16:05,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:16:05,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:16:05,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:16:08,926 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:16:08,927 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-27 05:16:08,927 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-27 05:16:08,927 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-27 05:16:08,927 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:16:08,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 05:16:08,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:16:08,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-27 05:16:08,928 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:16:09,373 WARN L193 SmtUtils]: Spent 239.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-27 05:16:09,374 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:16:09,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:16:09,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:16:09,395 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:16:09,395 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:16:09,395 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:16:09,396 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-27 05:16:09,396 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:16:09,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:16:09,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:16:09,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:16:09,396 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:16:09,419 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:16:09,420 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1573198735] [2020-10-27 05:16:09,420 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:16:09,420 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-27 05:16:09,420 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882929893] [2020-10-27 05:16:09,420 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 05:16:09,420 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:16:09,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 05:16:09,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-27 05:16:09,421 INFO L87 Difference]: Start difference. First operand 1547 states and 2217 transitions. Second operand 8 states. [2020-10-27 05:16:09,736 WARN L193 SmtUtils]: Spent 272.00 ms on a formula simplification that was a NOOP. DAG size: 170