/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.3 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.4.ufo.BOUNDED-8.pals.c.v+sep-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-29 13:18:21,335 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-29 13:18:21,339 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-29 13:18:21,382 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-29 13:18:21,383 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-29 13:18:21,384 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-29 13:18:21,386 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-29 13:18:21,389 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-29 13:18:21,391 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-29 13:18:21,393 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-29 13:18:21,394 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-29 13:18:21,396 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-29 13:18:21,396 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-29 13:18:21,398 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-29 13:18:21,399 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-29 13:18:21,401 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-29 13:18:21,402 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-29 13:18:21,403 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-29 13:18:21,405 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-29 13:18:21,408 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-29 13:18:21,410 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-29 13:18:21,412 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-29 13:18:21,414 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-29 13:18:21,415 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-29 13:18:21,431 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-29 13:18:21,432 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-29 13:18:21,432 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-29 13:18:21,434 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-29 13:18:21,434 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-29 13:18:21,436 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-29 13:18:21,436 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-29 13:18:21,437 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-29 13:18:21,438 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-29 13:18:21,439 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-29 13:18:21,441 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-29 13:18:21,441 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-29 13:18:21,442 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-29 13:18:21,443 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-29 13:18:21,443 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-29 13:18:21,444 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-29 13:18:21,445 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-29 13:18:21,446 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-29 13:18:21,472 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-29 13:18:21,473 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-29 13:18:21,474 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-29 13:18:21,475 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-29 13:18:21,475 INFO L138 SettingsManager]: * Use SBE=true [2020-10-29 13:18:21,475 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-29 13:18:21,475 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-29 13:18:21,475 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-29 13:18:21,476 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-29 13:18:21,476 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-29 13:18:21,476 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-29 13:18:21,476 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-29 13:18:21,476 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-29 13:18:21,477 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-29 13:18:21,477 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-29 13:18:21,477 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-29 13:18:21,477 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-29 13:18:21,477 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-29 13:18:21,478 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-29 13:18:21,478 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-29 13:18:21,478 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-29 13:18:21,478 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 13:18:21,479 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-29 13:18:21,479 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-29 13:18:21,479 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-29 13:18:21,479 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-29 13:18:21,479 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-29 13:18:21,480 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-29 13:18:21,480 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-29 13:18:21,480 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true;unknown-allowed=true; [2020-10-29 13:18:21,859 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-29 13:18:21,889 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-29 13:18:21,892 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-29 13:18:21,893 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-29 13:18:21,894 INFO L275 PluginConnector]: CDTParser initialized [2020-10-29 13:18:21,895 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.4.ufo.BOUNDED-8.pals.c.v+sep-reducer.c [2020-10-29 13:18:21,985 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f7b4b6270/03218c8afffe4bfc9256de212e383507/FLAG82a4ff56d [2020-10-29 13:18:22,862 INFO L306 CDTParser]: Found 1 translation units. [2020-10-29 13:18:22,863 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.4.ufo.BOUNDED-8.pals.c.v+sep-reducer.c [2020-10-29 13:18:22,889 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f7b4b6270/03218c8afffe4bfc9256de212e383507/FLAG82a4ff56d [2020-10-29 13:18:22,999 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f7b4b6270/03218c8afffe4bfc9256de212e383507 [2020-10-29 13:18:23,002 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-29 13:18:23,010 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-29 13:18:23,014 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-29 13:18:23,015 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-29 13:18:23,019 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-29 13:18:23,021 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 01:18:23" (1/1) ... [2020-10-29 13:18:23,025 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@48b53381 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:18:23, skipping insertion in model container [2020-10-29 13:18:23,026 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 01:18:23" (1/1) ... [2020-10-29 13:18:23,035 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-29 13:18:23,146 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-29 13:18:23,876 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 13:18:23,893 INFO L203 MainTranslator]: Completed pre-run [2020-10-29 13:18:24,222 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 13:18:24,256 INFO L208 MainTranslator]: Completed translation [2020-10-29 13:18:24,256 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:18:24 WrapperNode [2020-10-29 13:18:24,256 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-29 13:18:24,257 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-29 13:18:24,258 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-29 13:18:24,258 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-29 13:18:24,274 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:18:24" (1/1) ... [2020-10-29 13:18:24,277 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:18:24" (1/1) ... [2020-10-29 13:18:24,332 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:18:24" (1/1) ... [2020-10-29 13:18:24,332 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:18:24" (1/1) ... [2020-10-29 13:18:24,407 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:18:24" (1/1) ... [2020-10-29 13:18:24,443 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:18:24" (1/1) ... [2020-10-29 13:18:24,459 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:18:24" (1/1) ... [2020-10-29 13:18:24,474 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-29 13:18:24,482 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-29 13:18:24,482 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-29 13:18:24,482 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-29 13:18:24,485 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:18:24" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 13:18:24,573 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-29 13:18:24,573 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-29 13:18:24,574 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-29 13:18:24,574 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-29 13:18:24,575 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-29 13:18:24,575 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-29 13:18:24,575 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-29 13:18:24,575 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-29 13:18:24,576 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-29 13:18:24,576 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-29 13:18:24,577 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-29 13:18:24,577 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-29 13:18:24,577 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-29 13:18:24,577 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-29 13:18:24,577 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-29 13:18:24,578 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-29 13:18:24,579 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-29 13:18:24,579 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-29 13:18:24,580 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-29 13:18:24,580 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-29 13:18:24,580 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-29 13:18:24,580 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-29 13:18:24,580 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-29 13:18:24,580 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-29 13:18:24,580 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-29 13:18:24,581 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-29 13:18:24,581 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-29 13:18:24,581 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-29 13:18:27,105 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-29 13:18:27,105 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-29 13:18:27,108 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 01:18:27 BoogieIcfgContainer [2020-10-29 13:18:27,108 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-29 13:18:27,110 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-29 13:18:27,111 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-29 13:18:27,114 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-29 13:18:27,114 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.10 01:18:23" (1/3) ... [2020-10-29 13:18:27,115 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43ad3089 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 01:18:27, skipping insertion in model container [2020-10-29 13:18:27,116 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:18:24" (2/3) ... [2020-10-29 13:18:27,116 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43ad3089 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 01:18:27, skipping insertion in model container [2020-10-29 13:18:27,116 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 01:18:27" (3/3) ... [2020-10-29 13:18:27,118 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.4.ufo.BOUNDED-8.pals.c.v+sep-reducer.c [2020-10-29 13:18:27,130 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-29 13:18:27,137 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-29 13:18:27,151 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-29 13:18:27,185 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-29 13:18:27,185 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-29 13:18:27,185 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-29 13:18:27,185 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-29 13:18:27,185 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-29 13:18:27,185 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-29 13:18:27,186 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-29 13:18:27,186 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-29 13:18:27,223 INFO L276 IsEmpty]: Start isEmpty. Operand 579 states. [2020-10-29 13:18:27,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-29 13:18:27,242 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:18:27,243 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:18:27,244 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:18:27,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:18:27,254 INFO L82 PathProgramCache]: Analyzing trace with hash 445602210, now seen corresponding path program 1 times [2020-10-29 13:18:27,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:18:27,269 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [425683881] [2020-10-29 13:18:27,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:18:27,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:18:27,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:28,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:28,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:29,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:29,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:30,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:30,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:31,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:31,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:31,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:31,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:32,735 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:18:32,736 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-29 13:18:32,736 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-29 13:18:32,736 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5032 [2020-10-29 13:18:32,740 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:18:32,740 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:18:32,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:18:32,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-29 13:18:32,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-29 13:18:32,741 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-29 13:18:34,094 WARN L193 SmtUtils]: Spent 1.14 s on a formula simplification that was a NOOP. DAG size: 340 [2020-10-29 13:18:34,097 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:18:34,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:18:34,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:34,134 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:18:34,134 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:18:34,135 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:18:34,135 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-10-29 13:18:34,135 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:18:34,135 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:18:34,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:18:34,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:18:34,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:18:34,136 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:18:34,172 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:18:34,173 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [425683881] [2020-10-29 13:18:34,175 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:18:34,176 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 13:18:34,177 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266974698] [2020-10-29 13:18:34,182 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:18:34,182 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:18:34,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:18:34,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:18:34,202 INFO L87 Difference]: Start difference. First operand 579 states. Second operand 6 states. [2020-10-29 13:18:35,178 WARN L193 SmtUtils]: Spent 835.00 ms on a formula simplification that was a NOOP. DAG size: 341 [2020-10-29 13:18:40,868 WARN L193 SmtUtils]: Spent 891.00 ms on a formula simplification that was a NOOP. DAG size: 342 [2020-10-29 13:18:42,149 WARN L193 SmtUtils]: Spent 854.00 ms on a formula simplification that was a NOOP. DAG size: 341 [2020-10-29 13:18:43,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:18:43,387 INFO L93 Difference]: Finished difference Result 1083 states and 1813 transitions. [2020-10-29 13:18:43,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-29 13:18:43,389 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 65 [2020-10-29 13:18:43,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:18:43,432 INFO L225 Difference]: With dead ends: 1083 [2020-10-29 13:18:43,432 INFO L226 Difference]: Without dead ends: 983 [2020-10-29 13:18:43,439 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-29 13:18:43,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 983 states. [2020-10-29 13:18:43,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 983 to 769. [2020-10-29 13:18:43,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 769 states. [2020-10-29 13:18:43,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 769 states to 769 states and 1010 transitions. [2020-10-29 13:18:43,586 INFO L78 Accepts]: Start accepts. Automaton has 769 states and 1010 transitions. Word has length 65 [2020-10-29 13:18:43,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:18:43,587 INFO L481 AbstractCegarLoop]: Abstraction has 769 states and 1010 transitions. [2020-10-29 13:18:43,587 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:18:43,587 INFO L276 IsEmpty]: Start isEmpty. Operand 769 states and 1010 transitions. [2020-10-29 13:18:43,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-29 13:18:43,592 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:18:43,592 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] [2020-10-29 13:18:43,593 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-29 13:18:43,593 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:18:43,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:18:43,594 INFO L82 PathProgramCache]: Analyzing trace with hash -965646780, now seen corresponding path program 1 times [2020-10-29 13:18:43,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:18:43,595 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [676103449] [2020-10-29 13:18:43,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:18:43,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:18:43,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:43,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:43,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:44,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:44,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:45,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:46,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:47,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:47,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:48,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:48,647 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:18:48,648 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-29 13:18:48,648 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-29 13:18:48,648 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-29 13:18:48,649 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:18:48,649 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:18:48,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:18:48,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-29 13:18:48,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-29 13:18:48,650 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:18:49,584 WARN L193 SmtUtils]: Spent 828.00 ms on a formula simplification that was a NOOP. DAG size: 340 [2020-10-29 13:18:49,604 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:18:49,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:18:49,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:49,647 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:18:49,647 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:18:49,647 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:18:49,648 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-10-29 13:18:49,649 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:18:49,649 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:18:49,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:18:49,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:18:49,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:18:49,650 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:18:49,677 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:18:49,678 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [676103449] [2020-10-29 13:18:49,679 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:18:49,680 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 13:18:49,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15580122] [2020-10-29 13:18:49,682 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:18:49,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:18:49,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:18:49,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:18:49,684 INFO L87 Difference]: Start difference. First operand 769 states and 1010 transitions. Second operand 6 states. [2020-10-29 13:18:50,584 WARN L193 SmtUtils]: Spent 828.00 ms on a formula simplification that was a NOOP. DAG size: 341 [2020-10-29 13:18:54,784 WARN L193 SmtUtils]: Spent 880.00 ms on a formula simplification that was a NOOP. DAG size: 342 [2020-10-29 13:18:56,064 WARN L193 SmtUtils]: Spent 928.00 ms on a formula simplification that was a NOOP. DAG size: 341 [2020-10-29 13:18:57,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:18:57,432 INFO L93 Difference]: Finished difference Result 2293 states and 3202 transitions. [2020-10-29 13:18:57,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-29 13:18:57,433 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 65 [2020-10-29 13:18:57,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:18:57,446 INFO L225 Difference]: With dead ends: 2293 [2020-10-29 13:18:57,446 INFO L226 Difference]: Without dead ends: 2059 [2020-10-29 13:18:57,449 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-29 13:18:57,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2059 states. [2020-10-29 13:18:57,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2059 to 1707. [2020-10-29 13:18:57,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1707 states. [2020-10-29 13:18:57,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1707 states to 1707 states and 2371 transitions. [2020-10-29 13:18:57,553 INFO L78 Accepts]: Start accepts. Automaton has 1707 states and 2371 transitions. Word has length 65 [2020-10-29 13:18:57,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:18:57,554 INFO L481 AbstractCegarLoop]: Abstraction has 1707 states and 2371 transitions. [2020-10-29 13:18:57,554 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:18:57,554 INFO L276 IsEmpty]: Start isEmpty. Operand 1707 states and 2371 transitions. [2020-10-29 13:18:57,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-29 13:18:57,558 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:18:57,558 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] [2020-10-29 13:18:57,559 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-29 13:18:57,559 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:18:57,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:18:57,559 INFO L82 PathProgramCache]: Analyzing trace with hash -1509097892, now seen corresponding path program 1 times [2020-10-29 13:18:57,560 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:18:57,560 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [433002067] [2020-10-29 13:18:57,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:18:57,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:18:57,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:57,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:57,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:58,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:59,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:00,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:01,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:01,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:02,627 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:19:02,627 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-29 13:19:02,627 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-29 13:19:02,628 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-29 13:19:02,628 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:19:02,628 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:19:02,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-29 13:19:02,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:19:02,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-29 13:19:02,629 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:19:03,886 WARN L193 SmtUtils]: Spent 815.00 ms on a formula simplification that was a NOOP. DAG size: 340 [2020-10-29 13:19:03,889 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:19:03,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:19:03,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:03,926 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:19:03,926 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:19:03,926 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:19:03,927 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-29 13:19:03,927 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:19:03,927 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:19:03,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:19:03,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:19:03,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:19:03,928 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:19:03,986 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:19:03,987 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [433002067] [2020-10-29 13:19:03,987 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:19:03,988 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-29 13:19:03,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68454002] [2020-10-29 13:19:03,989 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-29 13:19:03,989 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:19:03,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-29 13:19:03,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-29 13:19:03,991 INFO L87 Difference]: Start difference. First operand 1707 states and 2371 transitions. Second operand 9 states. [2020-10-29 13:19:05,037 WARN L193 SmtUtils]: Spent 896.00 ms on a formula simplification that was a NOOP. DAG size: 364 [2020-10-29 13:19:09,307 WARN L193 SmtUtils]: Spent 872.00 ms on a formula simplification that was a NOOP. DAG size: 359 [2020-10-29 13:19:10,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:19:10,577 INFO L93 Difference]: Finished difference Result 5328 states and 7905 transitions. [2020-10-29 13:19:10,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-29 13:19:10,581 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 65 [2020-10-29 13:19:10,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:19:10,610 INFO L225 Difference]: With dead ends: 5328 [2020-10-29 13:19:10,611 INFO L226 Difference]: Without dead ends: 4468 [2020-10-29 13:19:10,615 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2020-10-29 13:19:10,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4468 states. [2020-10-29 13:19:10,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4468 to 1674. [2020-10-29 13:19:10,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1674 states. [2020-10-29 13:19:10,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1674 states to 1674 states and 2318 transitions. [2020-10-29 13:19:10,812 INFO L78 Accepts]: Start accepts. Automaton has 1674 states and 2318 transitions. Word has length 65 [2020-10-29 13:19:10,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:19:10,813 INFO L481 AbstractCegarLoop]: Abstraction has 1674 states and 2318 transitions. [2020-10-29 13:19:10,813 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-29 13:19:10,813 INFO L276 IsEmpty]: Start isEmpty. Operand 1674 states and 2318 transitions. [2020-10-29 13:19:10,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-29 13:19:10,816 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:19:10,816 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] [2020-10-29 13:19:10,816 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-29 13:19:10,816 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:19:10,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:19:10,817 INFO L82 PathProgramCache]: Analyzing trace with hash 2123568343, now seen corresponding path program 1 times [2020-10-29 13:19:10,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:19:10,817 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1987836350] [2020-10-29 13:19:10,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:19:10,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:19:10,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:10,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:11,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:11,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:11,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:12,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:12,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:13,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:13,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:13,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:14,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:15,866 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:19:15,869 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-29 13:19:15,869 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-29 13:19:15,871 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-29 13:19:15,871 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:19:15,872 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:19:15,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:19:15,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 13:19:15,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-29 13:19:15,872 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:19:16,846 WARN L193 SmtUtils]: Spent 842.00 ms on a formula simplification that was a NOOP. DAG size: 340 [2020-10-29 13:19:16,847 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:19:16,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:19:16,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:16,911 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:19:16,912 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:19:16,912 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:19:16,912 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 41 [2020-10-29 13:19:16,912 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:19:16,912 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:19:16,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:19:16,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:19:16,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 13:19:16,913 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:19:16,948 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:19:16,948 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1987836350] [2020-10-29 13:19:16,949 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:19:16,949 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 13:19:16,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820849088] [2020-10-29 13:19:16,950 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:19:16,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:19:16,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:19:16,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:19:16,951 INFO L87 Difference]: Start difference. First operand 1674 states and 2318 transitions. Second operand 6 states. [2020-10-29 13:19:17,955 WARN L193 SmtUtils]: Spent 924.00 ms on a formula simplification that was a NOOP. DAG size: 349 [2020-10-29 13:19:20,656 WARN L193 SmtUtils]: Spent 813.00 ms on a formula simplification that was a NOOP. DAG size: 347 [2020-10-29 13:19:21,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:19:21,129 INFO L93 Difference]: Finished difference Result 2149 states and 3026 transitions. [2020-10-29 13:19:21,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-29 13:19:21,130 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 65 [2020-10-29 13:19:21,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:19:21,137 INFO L225 Difference]: With dead ends: 2149 [2020-10-29 13:19:21,137 INFO L226 Difference]: Without dead ends: 1188 [2020-10-29 13:19:21,140 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-10-29 13:19:21,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1188 states. [2020-10-29 13:19:21,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1188 to 940. [2020-10-29 13:19:21,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 940 states. [2020-10-29 13:19:21,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 940 states to 940 states and 1293 transitions. [2020-10-29 13:19:21,219 INFO L78 Accepts]: Start accepts. Automaton has 940 states and 1293 transitions. Word has length 65 [2020-10-29 13:19:21,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:19:21,221 INFO L481 AbstractCegarLoop]: Abstraction has 940 states and 1293 transitions. [2020-10-29 13:19:21,221 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:19:21,221 INFO L276 IsEmpty]: Start isEmpty. Operand 940 states and 1293 transitions. [2020-10-29 13:19:21,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-29 13:19:21,224 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:19:21,224 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] [2020-10-29 13:19:21,224 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-29 13:19:21,224 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:19:21,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:19:21,225 INFO L82 PathProgramCache]: Analyzing trace with hash -2115175167, now seen corresponding path program 1 times [2020-10-29 13:19:21,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:19:21,225 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [138004297] [2020-10-29 13:19:21,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:19:21,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:19:21,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:21,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:21,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:21,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:21,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:22,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:25,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:25,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:25,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:25,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:26,284 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:19:26,284 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-29 13:19:26,284 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-29 13:19:26,284 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-29 13:19:26,285 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:19:26,285 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:19:26,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-29 13:19:26,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:19:26,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-29 13:19:26,285 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:19:27,272 WARN L193 SmtUtils]: Spent 791.00 ms on a formula simplification that was a NOOP. DAG size: 340 [2020-10-29 13:19:27,273 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:19:27,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:19:27,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:27,324 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:19:27,327 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:19:27,327 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:19:27,328 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 35 [2020-10-29 13:19:27,328 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:19:27,328 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:19:27,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:19:27,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:19:27,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:19:27,329 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:19:27,368 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:19:27,369 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [138004297] [2020-10-29 13:19:27,369 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:19:27,369 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-29 13:19:27,370 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245337343] [2020-10-29 13:19:27,370 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-29 13:19:27,370 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:19:27,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-29 13:19:27,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-10-29 13:19:27,371 INFO L87 Difference]: Start difference. First operand 940 states and 1293 transitions. Second operand 9 states. [2020-10-29 13:19:28,350 WARN L193 SmtUtils]: Spent 890.00 ms on a formula simplification that was a NOOP. DAG size: 351 [2020-10-29 13:19:31,254 WARN L193 SmtUtils]: Spent 909.00 ms on a formula simplification that was a NOOP. DAG size: 349 [2020-10-29 13:19:32,418 WARN L193 SmtUtils]: Spent 887.00 ms on a formula simplification that was a NOOP. DAG size: 346 [2020-10-29 13:19:33,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:19:33,219 INFO L93 Difference]: Finished difference Result 2450 states and 3514 transitions. [2020-10-29 13:19:33,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-29 13:19:33,219 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 65 [2020-10-29 13:19:33,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:19:33,233 INFO L225 Difference]: With dead ends: 2450 [2020-10-29 13:19:33,233 INFO L226 Difference]: Without dead ends: 2443 [2020-10-29 13:19:33,235 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2020-10-29 13:19:33,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2443 states. [2020-10-29 13:19:33,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2443 to 1004. [2020-10-29 13:19:33,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1004 states. [2020-10-29 13:19:33,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1004 states to 1004 states and 1375 transitions. [2020-10-29 13:19:33,338 INFO L78 Accepts]: Start accepts. Automaton has 1004 states and 1375 transitions. Word has length 65 [2020-10-29 13:19:33,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:19:33,338 INFO L481 AbstractCegarLoop]: Abstraction has 1004 states and 1375 transitions. [2020-10-29 13:19:33,338 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-29 13:19:33,338 INFO L276 IsEmpty]: Start isEmpty. Operand 1004 states and 1375 transitions. [2020-10-29 13:19:33,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-29 13:19:33,340 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:19:33,340 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] [2020-10-29 13:19:33,340 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-29 13:19:33,341 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:19:33,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:19:33,341 INFO L82 PathProgramCache]: Analyzing trace with hash 1721728547, now seen corresponding path program 1 times [2020-10-29 13:19:33,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:19:33,342 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1750273472] [2020-10-29 13:19:33,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:19:33,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:19:33,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:33,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:33,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:33,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:34,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:34,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:34,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:34,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:35,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:38,383 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:19:38,384 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-29 13:19:38,384 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-29 13:19:38,384 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-29 13:19:38,384 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:19:38,384 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:19:38,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:19:38,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-29 13:19:38,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-29 13:19:38,384 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:19:39,394 WARN L193 SmtUtils]: Spent 928.00 ms on a formula simplification that was a NOOP. DAG size: 340 [2020-10-29 13:19:39,395 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:19:39,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:19:39,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:39,430 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:19:39,430 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:19:39,431 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:19:39,431 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-29 13:19:39,431 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:19:39,431 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:19:39,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:19:39,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:19:39,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:19:39,432 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:19:39,498 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:19:39,498 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1750273472] [2020-10-29 13:19:39,500 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:19:39,500 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 13:19:39,501 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027125264] [2020-10-29 13:19:39,501 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:19:39,501 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:19:39,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:19:39,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:19:39,502 INFO L87 Difference]: Start difference. First operand 1004 states and 1375 transitions. Second operand 6 states. [2020-10-29 13:19:40,420 WARN L193 SmtUtils]: Spent 855.00 ms on a formula simplification that was a NOOP. DAG size: 341 [2020-10-29 13:19:43,221 WARN L193 SmtUtils]: Spent 841.00 ms on a formula simplification that was a NOOP. DAG size: 342 [2020-10-29 13:19:44,193 WARN L193 SmtUtils]: Spent 806.00 ms on a formula simplification that was a NOOP. DAG size: 341 [2020-10-29 13:19:45,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:19:45,441 INFO L93 Difference]: Finished difference Result 1536 states and 2140 transitions. [2020-10-29 13:19:45,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-29 13:19:45,443 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 65 [2020-10-29 13:19:45,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:19:45,450 INFO L225 Difference]: With dead ends: 1536 [2020-10-29 13:19:45,450 INFO L226 Difference]: Without dead ends: 1308 [2020-10-29 13:19:45,452 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-29 13:19:45,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1308 states. [2020-10-29 13:19:45,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1308 to 999. [2020-10-29 13:19:45,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 999 states. [2020-10-29 13:19:45,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 999 states to 999 states and 1369 transitions. [2020-10-29 13:19:45,537 INFO L78 Accepts]: Start accepts. Automaton has 999 states and 1369 transitions. Word has length 65 [2020-10-29 13:19:45,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:19:45,537 INFO L481 AbstractCegarLoop]: Abstraction has 999 states and 1369 transitions. [2020-10-29 13:19:45,537 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:19:45,537 INFO L276 IsEmpty]: Start isEmpty. Operand 999 states and 1369 transitions. [2020-10-29 13:19:45,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-29 13:19:45,539 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:19:45,539 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] [2020-10-29 13:19:45,539 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-29 13:19:45,540 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:19:45,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:19:45,540 INFO L82 PathProgramCache]: Analyzing trace with hash 1292976802, now seen corresponding path program 1 times [2020-10-29 13:19:45,540 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:19:45,541 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1898864720] [2020-10-29 13:19:45,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:19:45,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:19:45,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:45,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:45,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:45,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:46,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:46,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:46,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:46,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:46,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:50,575 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:19:50,576 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-29 13:19:50,576 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-29 13:19:50,576 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-29 13:19:50,576 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:19:50,576 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:19:50,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:19:50,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-29 13:19:50,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-29 13:19:50,576 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:19:51,598 WARN L193 SmtUtils]: Spent 929.00 ms on a formula simplification that was a NOOP. DAG size: 340 [2020-10-29 13:19:51,600 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:19:51,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:19:51,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:51,629 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:19:51,629 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:19:51,629 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:19:51,629 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-29 13:19:51,630 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:19:51,630 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:19:51,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:19:51,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:19:51,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:19:51,630 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:19:51,650 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:19:51,651 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1898864720] [2020-10-29 13:19:51,651 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:19:51,651 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 13:19:51,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98245041] [2020-10-29 13:19:51,653 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:19:51,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:19:51,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:19:51,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:19:51,654 INFO L87 Difference]: Start difference. First operand 999 states and 1369 transitions. Second operand 6 states. [2020-10-29 13:19:52,576 WARN L193 SmtUtils]: Spent 858.00 ms on a formula simplification that was a NOOP. DAG size: 341 [2020-10-29 13:19:55,346 WARN L193 SmtUtils]: Spent 835.00 ms on a formula simplification that was a NOOP. DAG size: 342 [2020-10-29 13:19:56,379 WARN L193 SmtUtils]: Spent 846.00 ms on a formula simplification that was a NOOP. DAG size: 341 [2020-10-29 13:19:57,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:19:57,743 INFO L93 Difference]: Finished difference Result 3833 states and 5634 transitions. [2020-10-29 13:19:57,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-29 13:19:57,746 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 65 [2020-10-29 13:19:57,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:19:57,765 INFO L225 Difference]: With dead ends: 3833 [2020-10-29 13:19:57,765 INFO L226 Difference]: Without dead ends: 3402 [2020-10-29 13:19:57,768 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-29 13:19:57,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3402 states. [2020-10-29 13:19:58,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3402 to 2482. [2020-10-29 13:19:58,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2482 states. [2020-10-29 13:19:58,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2482 states to 2482 states and 3589 transitions. [2020-10-29 13:19:58,021 INFO L78 Accepts]: Start accepts. Automaton has 2482 states and 3589 transitions. Word has length 65 [2020-10-29 13:19:58,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:19:58,021 INFO L481 AbstractCegarLoop]: Abstraction has 2482 states and 3589 transitions. [2020-10-29 13:19:58,022 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:19:58,022 INFO L276 IsEmpty]: Start isEmpty. Operand 2482 states and 3589 transitions. [2020-10-29 13:19:58,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-29 13:19:58,028 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:19:58,028 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] [2020-10-29 13:19:58,028 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-29 13:19:58,028 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:19:58,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:19:58,029 INFO L82 PathProgramCache]: Analyzing trace with hash -426155862, now seen corresponding path program 1 times [2020-10-29 13:19:58,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:19:58,029 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1040689636] [2020-10-29 13:19:58,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:19:58,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:19:58,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:58,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:58,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:58,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:58,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:58,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:59,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:01,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:02,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:02,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:02,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:02,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:03,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:03,106 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:20:03,107 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-29 13:20:03,107 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-29 13:20:03,107 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5036 [2020-10-29 13:20:03,107 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:20:03,107 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:20:03,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 13:20:03,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:20:03,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-29 13:20:03,108 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:20:04,172 WARN L193 SmtUtils]: Spent 837.00 ms on a formula simplification that was a NOOP. DAG size: 340 [2020-10-29 13:20:04,179 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:20:04,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:20:04,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:04,209 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:20:04,210 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:20:04,210 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:20:04,210 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-29 13:20:04,210 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:20:04,210 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:20:04,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:20:04,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:20:04,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:20:04,211 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:20:04,236 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:20:04,236 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1040689636] [2020-10-29 13:20:04,237 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:20:04,237 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-29 13:20:04,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528299443] [2020-10-29 13:20:04,238 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 13:20:04,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:20:04,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 13:20:04,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-29 13:20:04,245 INFO L87 Difference]: Start difference. First operand 2482 states and 3589 transitions. Second operand 8 states. [2020-10-29 13:20:05,233 WARN L193 SmtUtils]: Spent 897.00 ms on a formula simplification that was a NOOP. DAG size: 352 [2020-10-29 13:20:08,029 WARN L193 SmtUtils]: Spent 857.00 ms on a formula simplification that was a NOOP. DAG size: 348 [2020-10-29 13:20:09,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:20:09,408 INFO L93 Difference]: Finished difference Result 7517 states and 11316 transitions. [2020-10-29 13:20:09,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-29 13:20:09,408 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 67 [2020-10-29 13:20:09,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:20:09,427 INFO L225 Difference]: With dead ends: 7517 [2020-10-29 13:20:09,427 INFO L226 Difference]: Without dead ends: 5869 [2020-10-29 13:20:09,430 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2020-10-29 13:20:09,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5869 states. [2020-10-29 13:20:09,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5869 to 2482. [2020-10-29 13:20:09,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2482 states. [2020-10-29 13:20:09,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2482 states to 2482 states and 3586 transitions. [2020-10-29 13:20:09,699 INFO L78 Accepts]: Start accepts. Automaton has 2482 states and 3586 transitions. Word has length 67 [2020-10-29 13:20:09,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:20:09,699 INFO L481 AbstractCegarLoop]: Abstraction has 2482 states and 3586 transitions. [2020-10-29 13:20:09,699 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 13:20:09,699 INFO L276 IsEmpty]: Start isEmpty. Operand 2482 states and 3586 transitions. [2020-10-29 13:20:09,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-29 13:20:09,701 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:20:09,701 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] [2020-10-29 13:20:09,702 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-29 13:20:09,702 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:20:09,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:20:09,702 INFO L82 PathProgramCache]: Analyzing trace with hash 1025904546, now seen corresponding path program 1 times [2020-10-29 13:20:09,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:20:09,703 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [383437310] [2020-10-29 13:20:09,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:20:09,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:20:09,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:09,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:09,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:10,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:10,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:10,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:10,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:12,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:12,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:12,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:13,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:13,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:14,744 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:20:14,745 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-29 13:20:14,745 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-29 13:20:14,745 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-29 13:20:14,745 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:20:14,745 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:20:14,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 13:20:14,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:20:14,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-29 13:20:14,746 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:20:15,728 WARN L193 SmtUtils]: Spent 845.00 ms on a formula simplification that was a NOOP. DAG size: 340 [2020-10-29 13:20:15,730 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:20:15,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:20:15,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:15,760 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:20:15,761 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:20:15,761 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:20:15,761 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-29 13:20:15,761 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:20:15,761 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:20:15,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:20:15,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:20:15,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:20:15,761 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:20:15,780 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:20:15,781 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [383437310] [2020-10-29 13:20:15,781 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:20:15,781 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-29 13:20:15,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488996971] [2020-10-29 13:20:15,782 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 13:20:15,782 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:20:15,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 13:20:15,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-29 13:20:15,783 INFO L87 Difference]: Start difference. First operand 2482 states and 3586 transitions. Second operand 8 states. [2020-10-29 13:20:16,749 WARN L193 SmtUtils]: Spent 900.00 ms on a formula simplification that was a NOOP. DAG size: 347 [2020-10-29 13:20:19,454 WARN L193 SmtUtils]: Spent 908.00 ms on a formula simplification that was a NOOP. DAG size: 349 [2020-10-29 13:20:20,503 WARN L193 SmtUtils]: Spent 867.00 ms on a formula simplification that was a NOOP. DAG size: 350 [2020-10-29 13:20:21,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:20:21,682 INFO L93 Difference]: Finished difference Result 6792 states and 10112 transitions. [2020-10-29 13:20:21,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-29 13:20:21,683 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 67 [2020-10-29 13:20:21,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:20:21,709 INFO L225 Difference]: With dead ends: 6792 [2020-10-29 13:20:21,709 INFO L226 Difference]: Without dead ends: 5932 [2020-10-29 13:20:21,712 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-10-29 13:20:21,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5932 states. [2020-10-29 13:20:22,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5932 to 2447. [2020-10-29 13:20:22,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2447 states. [2020-10-29 13:20:22,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2447 states to 2447 states and 3536 transitions. [2020-10-29 13:20:22,042 INFO L78 Accepts]: Start accepts. Automaton has 2447 states and 3536 transitions. Word has length 67 [2020-10-29 13:20:22,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:20:22,043 INFO L481 AbstractCegarLoop]: Abstraction has 2447 states and 3536 transitions. [2020-10-29 13:20:22,043 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 13:20:22,043 INFO L276 IsEmpty]: Start isEmpty. Operand 2447 states and 3536 transitions. [2020-10-29 13:20:22,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-29 13:20:22,045 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:20:22,045 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] [2020-10-29 13:20:22,045 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-29 13:20:22,046 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:20:22,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:20:22,046 INFO L82 PathProgramCache]: Analyzing trace with hash -437075604, now seen corresponding path program 1 times [2020-10-29 13:20:22,046 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:20:22,047 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [870431868] [2020-10-29 13:20:22,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:20:22,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:20:22,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:22,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:22,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:22,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:22,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:23,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:23,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:23,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:25,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:25,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:26,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:26,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:26,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:26,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:27,089 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:20:27,089 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-29 13:20:27,089 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-29 13:20:27,089 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-29 13:20:27,089 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:20:27,089 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:20:27,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-29 13:20:27,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:20:27,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-29 13:20:27,090 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:20:28,030 WARN L193 SmtUtils]: Spent 850.00 ms on a formula simplification that was a NOOP. DAG size: 340 [2020-10-29 13:20:28,032 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:20:28,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:20:28,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:28,054 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:20:28,054 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:20:28,054 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:20:28,054 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-29 13:20:28,054 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:20:28,054 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:20:28,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:20:28,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:20:28,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:20:28,055 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:20:28,105 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:20:28,106 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [870431868] [2020-10-29 13:20:28,106 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:20:28,106 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-29 13:20:28,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767764942] [2020-10-29 13:20:28,107 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 13:20:28,107 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:20:28,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 13:20:28,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-29 13:20:28,108 INFO L87 Difference]: Start difference. First operand 2447 states and 3536 transitions. Second operand 7 states. [2020-10-29 13:20:29,095 WARN L193 SmtUtils]: Spent 909.00 ms on a formula simplification that was a NOOP. DAG size: 350 [2020-10-29 13:20:32,151 WARN L193 SmtUtils]: Spent 873.00 ms on a formula simplification that was a NOOP. DAG size: 348 [2020-10-29 13:20:33,070 WARN L193 SmtUtils]: Spent 859.00 ms on a formula simplification that was a NOOP. DAG size: 346 [2020-10-29 13:20:34,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:20:34,951 INFO L93 Difference]: Finished difference Result 8460 states and 12648 transitions. [2020-10-29 13:20:34,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-29 13:20:34,952 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 67 [2020-10-29 13:20:34,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:20:34,966 INFO L225 Difference]: With dead ends: 8460 [2020-10-29 13:20:34,966 INFO L226 Difference]: Without dead ends: 6800 [2020-10-29 13:20:34,972 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2020-10-29 13:20:34,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6800 states. [2020-10-29 13:20:35,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6800 to 5918. [2020-10-29 13:20:35,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5918 states. [2020-10-29 13:20:35,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5918 states to 5918 states and 8742 transitions. [2020-10-29 13:20:35,760 INFO L78 Accepts]: Start accepts. Automaton has 5918 states and 8742 transitions. Word has length 67 [2020-10-29 13:20:35,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:20:35,760 INFO L481 AbstractCegarLoop]: Abstraction has 5918 states and 8742 transitions. [2020-10-29 13:20:35,761 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 13:20:35,761 INFO L276 IsEmpty]: Start isEmpty. Operand 5918 states and 8742 transitions. [2020-10-29 13:20:35,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-29 13:20:35,764 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:20:35,764 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] [2020-10-29 13:20:35,764 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-29 13:20:35,765 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:20:35,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:20:35,766 INFO L82 PathProgramCache]: Analyzing trace with hash -319914876, now seen corresponding path program 1 times [2020-10-29 13:20:35,766 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:20:35,766 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1895837396] [2020-10-29 13:20:35,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:20:35,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:20:35,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:35,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:35,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:36,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:36,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:36,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:36,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:37,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:37,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:37,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:38,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:38,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:39,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:39,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:39,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:40,802 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:20:40,803 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-29 13:20:40,803 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-29 13:20:40,803 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-29 13:20:40,803 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:20:40,803 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:20:40,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 13:20:40,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:20:40,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-29 13:20:40,803 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:20:41,781 WARN L193 SmtUtils]: Spent 842.00 ms on a formula simplification that was a NOOP. DAG size: 340 [2020-10-29 13:20:41,783 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:20:41,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:20:41,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:41,815 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:20:41,815 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:20:41,815 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:20:41,815 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-29 13:20:41,815 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:20:41,816 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:20:41,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:20:41,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:20:41,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:20:41,817 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:20:41,843 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:20:41,844 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1895837396] [2020-10-29 13:20:41,849 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:20:41,849 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-29 13:20:41,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956060967] [2020-10-29 13:20:41,851 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 13:20:41,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:20:41,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 13:20:41,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-29 13:20:41,852 INFO L87 Difference]: Start difference. First operand 5918 states and 8742 transitions. Second operand 8 states. [2020-10-29 13:20:42,679 WARN L193 SmtUtils]: Spent 756.00 ms on a formula simplification that was a NOOP. DAG size: 347 [2020-10-29 13:20:45,451 WARN L193 SmtUtils]: Spent 1.02 s on a formula simplification that was a NOOP. DAG size: 349 [2020-10-29 13:20:47,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:20:47,019 INFO L93 Difference]: Finished difference Result 9239 states and 13789 transitions. [2020-10-29 13:20:47,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-29 13:20:47,020 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 67 [2020-10-29 13:20:47,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:20:47,038 INFO L225 Difference]: With dead ends: 9239 [2020-10-29 13:20:47,038 INFO L226 Difference]: Without dead ends: 7561 [2020-10-29 13:20:47,044 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2020-10-29 13:20:47,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7561 states. [2020-10-29 13:20:47,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7561 to 5882. [2020-10-29 13:20:47,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5882 states. [2020-10-29 13:20:47,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5882 states to 5882 states and 8691 transitions. [2020-10-29 13:20:47,791 INFO L78 Accepts]: Start accepts. Automaton has 5882 states and 8691 transitions. Word has length 67 [2020-10-29 13:20:47,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:20:47,791 INFO L481 AbstractCegarLoop]: Abstraction has 5882 states and 8691 transitions. [2020-10-29 13:20:47,791 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 13:20:47,791 INFO L276 IsEmpty]: Start isEmpty. Operand 5882 states and 8691 transitions. [2020-10-29 13:20:47,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-29 13:20:47,794 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:20:47,794 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] [2020-10-29 13:20:47,795 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-29 13:20:47,795 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:20:47,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:20:47,795 INFO L82 PathProgramCache]: Analyzing trace with hash 1523114391, now seen corresponding path program 1 times [2020-10-29 13:20:47,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:20:47,796 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [543727409] [2020-10-29 13:20:47,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:20:47,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:20:47,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:47,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:48,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:48,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:48,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:48,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:48,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:49,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:49,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:50,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:50,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:50,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:52,830 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:20:52,830 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-29 13:20:52,830 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-29 13:20:52,831 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-29 13:20:52,831 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:20:52,831 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:20:52,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 13:20:52,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:20:52,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-29 13:20:52,831 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:20:53,803 WARN L193 SmtUtils]: Spent 785.00 ms on a formula simplification that was a NOOP. DAG size: 340 [2020-10-29 13:20:53,804 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:20:53,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:20:53,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:53,831 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:20:53,831 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:20:53,831 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:20:53,831 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-29 13:20:53,832 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:20:53,832 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:20:53,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:20:53,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:20:53,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:20:53,832 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:20:53,854 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:20:53,855 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [543727409] [2020-10-29 13:20:53,855 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:20:53,855 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-29 13:20:53,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46030665] [2020-10-29 13:20:53,855 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 13:20:53,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:20:53,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 13:20:53,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-29 13:20:53,856 INFO L87 Difference]: Start difference. First operand 5882 states and 8691 transitions. Second operand 8 states. [2020-10-29 13:20:54,867 WARN L193 SmtUtils]: Spent 919.00 ms on a formula simplification that was a NOOP. DAG size: 360 [2020-10-29 13:20:57,827 WARN L193 SmtUtils]: Spent 885.00 ms on a formula simplification that was a NOOP. DAG size: 355 [2020-10-29 13:21:00,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:21:00,481 INFO L93 Difference]: Finished difference Result 14528 states and 21690 transitions. [2020-10-29 13:21:00,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-29 13:21:00,481 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 67 [2020-10-29 13:21:00,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:21:00,517 INFO L225 Difference]: With dead ends: 14528 [2020-10-29 13:21:00,517 INFO L226 Difference]: Without dead ends: 14521 [2020-10-29 13:21:00,523 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2020-10-29 13:21:00,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14521 states. [2020-10-29 13:21:01,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14521 to 5882. [2020-10-29 13:21:01,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5882 states. [2020-10-29 13:21:01,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5882 states to 5882 states and 8690 transitions. [2020-10-29 13:21:01,396 INFO L78 Accepts]: Start accepts. Automaton has 5882 states and 8690 transitions. Word has length 67 [2020-10-29 13:21:01,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:21:01,396 INFO L481 AbstractCegarLoop]: Abstraction has 5882 states and 8690 transitions. [2020-10-29 13:21:01,396 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 13:21:01,396 INFO L276 IsEmpty]: Start isEmpty. Operand 5882 states and 8690 transitions. [2020-10-29 13:21:01,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-29 13:21:01,398 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:21:01,398 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:21:01,398 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-29 13:21:01,398 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:21:01,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:21:01,399 INFO L82 PathProgramCache]: Analyzing trace with hash 1270044957, now seen corresponding path program 1 times [2020-10-29 13:21:01,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:21:01,399 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [934904966] [2020-10-29 13:21:01,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:21:01,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:21:01,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:21:01,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:21:01,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:21:01,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:21:01,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:21:02,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:21:02,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:21:02,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:21:03,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:21:03,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:21:04,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:21:04,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:21:06,435 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:21:06,436 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-29 13:21:06,436 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-29 13:21:06,436 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-29 13:21:06,436 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:21:06,436 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:21:06,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 13:21:06,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:21:06,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-29 13:21:06,436 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:21:07,355 WARN L193 SmtUtils]: Spent 821.00 ms on a formula simplification that was a NOOP. DAG size: 340 [2020-10-29 13:21:07,356 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:21:07,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:21:07,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:21:07,381 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:21:07,382 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:21:07,382 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:21:07,382 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-29 13:21:07,382 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:21:07,382 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:21:07,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:21:07,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:21:07,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:21:07,383 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:21:07,406 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:21:07,407 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [934904966] [2020-10-29 13:21:07,407 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:21:07,407 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-29 13:21:07,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923899185] [2020-10-29 13:21:07,408 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 13:21:07,408 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:21:07,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 13:21:07,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-29 13:21:07,409 INFO L87 Difference]: Start difference. First operand 5882 states and 8690 transitions. Second operand 8 states. [2020-10-29 13:21:08,424 WARN L193 SmtUtils]: Spent 932.00 ms on a formula simplification that was a NOOP. DAG size: 352 [2020-10-29 13:21:11,198 WARN L193 SmtUtils]: Spent 888.00 ms on a formula simplification that was a NOOP. DAG size: 348 [2020-10-29 13:21:12,149 WARN L193 SmtUtils]: Spent 838.00 ms on a formula simplification that was a NOOP. DAG size: 346 [2020-10-29 13:21:14,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:21:14,263 INFO L93 Difference]: Finished difference Result 12160 states and 18212 transitions. [2020-10-29 13:21:14,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-29 13:21:14,264 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 67 [2020-10-29 13:21:14,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:21:14,282 INFO L225 Difference]: With dead ends: 12160 [2020-10-29 13:21:14,283 INFO L226 Difference]: Without dead ends: 9720 [2020-10-29 13:21:14,291 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2020-10-29 13:21:14,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9720 states. [2020-10-29 13:21:15,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9720 to 5882. [2020-10-29 13:21:15,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5882 states. [2020-10-29 13:21:15,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5882 states to 5882 states and 8663 transitions. [2020-10-29 13:21:15,293 INFO L78 Accepts]: Start accepts. Automaton has 5882 states and 8663 transitions. Word has length 67 [2020-10-29 13:21:15,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:21:15,293 INFO L481 AbstractCegarLoop]: Abstraction has 5882 states and 8663 transitions. [2020-10-29 13:21:15,293 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 13:21:15,293 INFO L276 IsEmpty]: Start isEmpty. Operand 5882 states and 8663 transitions. [2020-10-29 13:21:15,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-29 13:21:15,295 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:21:15,295 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:21:15,295 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-29 13:21:15,295 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:21:15,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:21:15,296 INFO L82 PathProgramCache]: Analyzing trace with hash 195358437, now seen corresponding path program 1 times [2020-10-29 13:21:15,296 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:21:15,296 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [41187609] [2020-10-29 13:21:15,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:21:15,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:21:15,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:21:15,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:21:15,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:21:15,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:21:16,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:21:16,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:21:16,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:21:17,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:21:17,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:21:18,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:21:18,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:21:19,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:21:19,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:21:20,341 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:21:20,341 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-29 13:21:20,341 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-29 13:21:20,342 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-29 13:21:20,342 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:21:20,342 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:21:20,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-29 13:21:20,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:21:20,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-29 13:21:20,342 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:21:21,300 WARN L193 SmtUtils]: Spent 832.00 ms on a formula simplification that was a NOOP. DAG size: 340 [2020-10-29 13:21:21,302 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:21:21,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:21:21,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:21:21,322 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:21:21,322 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:21:21,322 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:21:21,322 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-29 13:21:21,322 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:21:21,322 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:21:21,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:21:21,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:21:21,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:21:21,323 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:21:21,342 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:21:21,343 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [41187609] [2020-10-29 13:21:21,343 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:21:21,343 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-29 13:21:21,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2172510] [2020-10-29 13:21:21,343 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-29 13:21:21,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:21:21,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-29 13:21:21,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-29 13:21:21,344 INFO L87 Difference]: Start difference. First operand 5882 states and 8663 transitions. Second operand 9 states. [2020-10-29 13:21:22,309 WARN L193 SmtUtils]: Spent 882.00 ms on a formula simplification that was a NOOP. DAG size: 347 [2020-10-29 13:21:25,142 WARN L193 SmtUtils]: Spent 908.00 ms on a formula simplification that was a NOOP. DAG size: 349 [2020-10-29 13:21:26,096 WARN L193 SmtUtils]: Spent 889.00 ms on a formula simplification that was a NOOP. DAG size: 346 [2020-10-29 13:21:27,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:21:27,430 INFO L93 Difference]: Finished difference Result 10826 states and 16220 transitions. [2020-10-29 13:21:27,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-29 13:21:27,430 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 68 [2020-10-29 13:21:27,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:21:27,445 INFO L225 Difference]: With dead ends: 10826 [2020-10-29 13:21:27,445 INFO L226 Difference]: Without dead ends: 8376 [2020-10-29 13:21:27,452 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2020-10-29 13:21:27,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8376 states. [2020-10-29 13:21:28,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8376 to 5869. [2020-10-29 13:21:28,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5869 states. [2020-10-29 13:21:28,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5869 states to 5869 states and 8642 transitions. [2020-10-29 13:21:28,449 INFO L78 Accepts]: Start accepts. Automaton has 5869 states and 8642 transitions. Word has length 68 [2020-10-29 13:21:28,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:21:28,449 INFO L481 AbstractCegarLoop]: Abstraction has 5869 states and 8642 transitions. [2020-10-29 13:21:28,449 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-29 13:21:28,449 INFO L276 IsEmpty]: Start isEmpty. Operand 5869 states and 8642 transitions. [2020-10-29 13:21:28,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-29 13:21:28,451 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:21:28,451 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] [2020-10-29 13:21:28,451 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-29 13:21:28,452 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:21:28,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:21:28,452 INFO L82 PathProgramCache]: Analyzing trace with hash -1340768716, now seen corresponding path program 1 times [2020-10-29 13:21:28,452 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:21:28,453 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [197163471] [2020-10-29 13:21:28,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:21:28,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:21:28,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:21:28,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:21:28,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:21:28,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:21:28,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:21:28,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:21:29,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:21:30,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:21:33,495 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:21:33,495 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-29 13:21:33,495 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-29 13:21:33,495 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-29 13:21:33,495 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:21:33,496 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:21:33,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-29 13:21:33,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:21:33,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-29 13:21:33,496 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:21:34,434 WARN L193 SmtUtils]: Spent 849.00 ms on a formula simplification that was a NOOP. DAG size: 340 [2020-10-29 13:21:34,436 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:21:34,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:21:34,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:21:34,457 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:21:34,457 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:21:34,457 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:21:34,457 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-29 13:21:34,458 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:21:34,458 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:21:34,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:21:34,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:21:34,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:21:34,458 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:21:34,474 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:21:34,474 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [197163471] [2020-10-29 13:21:34,474 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:21:34,474 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-29 13:21:34,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521678087] [2020-10-29 13:21:34,475 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 13:21:34,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:21:34,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 13:21:34,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-29 13:21:34,475 INFO L87 Difference]: Start difference. First operand 5869 states and 8642 transitions. Second operand 7 states. [2020-10-29 13:21:35,470 WARN L193 SmtUtils]: Spent 911.00 ms on a formula simplification that was a NOOP. DAG size: 350 [2020-10-29 13:21:38,535 WARN L193 SmtUtils]: Spent 872.00 ms on a formula simplification that was a NOOP. DAG size: 348 [2020-10-29 13:21:39,433 WARN L193 SmtUtils]: Spent 858.00 ms on a formula simplification that was a NOOP. DAG size: 346 [2020-10-29 13:21:41,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:21:41,363 INFO L93 Difference]: Finished difference Result 7648 states and 11294 transitions. [2020-10-29 13:21:41,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-29 13:21:41,363 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 69 [2020-10-29 13:21:41,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:21:41,374 INFO L225 Difference]: With dead ends: 7648 [2020-10-29 13:21:41,374 INFO L226 Difference]: Without dead ends: 6769 [2020-10-29 13:21:41,378 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2020-10-29 13:21:41,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6769 states. [2020-10-29 13:21:42,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6769 to 5869. [2020-10-29 13:21:42,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5869 states. [2020-10-29 13:21:42,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5869 states to 5869 states and 8641 transitions. [2020-10-29 13:21:42,147 INFO L78 Accepts]: Start accepts. Automaton has 5869 states and 8641 transitions. Word has length 69 [2020-10-29 13:21:42,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:21:42,147 INFO L481 AbstractCegarLoop]: Abstraction has 5869 states and 8641 transitions. [2020-10-29 13:21:42,147 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 13:21:42,147 INFO L276 IsEmpty]: Start isEmpty. Operand 5869 states and 8641 transitions. [2020-10-29 13:21:42,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-29 13:21:42,150 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:21:42,150 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] [2020-10-29 13:21:42,150 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-29 13:21:42,150 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:21:42,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:21:42,151 INFO L82 PathProgramCache]: Analyzing trace with hash -990290073, now seen corresponding path program 1 times [2020-10-29 13:21:42,151 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:21:42,151 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1913910039] [2020-10-29 13:21:42,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:21:42,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:21:42,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:21:42,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:21:42,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:21:42,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:21:46,377 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:21:46,377 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-29 13:21:46,377 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 13:21:46,377 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4191 [2020-10-29 13:21:46,377 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:21:46,377 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:21:46,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-29 13:21:46,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:21:46,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-29 13:21:46,378 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:21:47,394 WARN L193 SmtUtils]: Spent 849.00 ms on a formula simplification that was a NOOP. DAG size: 340 [2020-10-29 13:21:47,396 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:21:47,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:21:47,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:21:47,414 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:21:47,415 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:21:47,415 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:21:47,415 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-29 13:21:47,415 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:21:47,415 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:21:47,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:21:47,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:21:47,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:21:47,415 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:21:47,445 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:21:47,446 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1913910039] [2020-10-29 13:21:47,446 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:21:47,446 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-29 13:21:47,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665382734] [2020-10-29 13:21:47,447 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-29 13:21:47,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:21:47,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-29 13:21:47,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-29 13:21:47,447 INFO L87 Difference]: Start difference. First operand 5869 states and 8641 transitions. Second operand 9 states. [2020-10-29 13:21:48,385 WARN L193 SmtUtils]: Spent 865.00 ms on a formula simplification that was a NOOP. DAG size: 352 [2020-10-29 13:21:51,395 WARN L193 SmtUtils]: Spent 923.00 ms on a formula simplification that was a NOOP. DAG size: 351 [2020-10-29 13:21:53,412 WARN L193 SmtUtils]: Spent 1.97 s on a formula simplification. DAG size of input: 360 DAG size of output: 354 [2020-10-29 13:21:55,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:21:55,200 INFO L93 Difference]: Finished difference Result 10833 states and 16226 transitions. [2020-10-29 13:21:55,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-29 13:21:55,201 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 69 [2020-10-29 13:21:55,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:21:55,212 INFO L225 Difference]: With dead ends: 10833 [2020-10-29 13:21:55,212 INFO L226 Difference]: Without dead ends: 10826 [2020-10-29 13:21:55,215 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2020-10-29 13:21:55,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10826 states. [2020-10-29 13:21:56,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10826 to 5864. [2020-10-29 13:21:56,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5864 states. [2020-10-29 13:21:56,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5864 states to 5864 states and 8618 transitions. [2020-10-29 13:21:56,037 INFO L78 Accepts]: Start accepts. Automaton has 5864 states and 8618 transitions. Word has length 69 [2020-10-29 13:21:56,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:21:56,037 INFO L481 AbstractCegarLoop]: Abstraction has 5864 states and 8618 transitions. [2020-10-29 13:21:56,037 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-29 13:21:56,037 INFO L276 IsEmpty]: Start isEmpty. Operand 5864 states and 8618 transitions. [2020-10-29 13:21:56,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-29 13:21:56,040 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:21:56,040 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] [2020-10-29 13:21:56,040 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-29 13:21:56,041 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:21:56,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:21:56,041 INFO L82 PathProgramCache]: Analyzing trace with hash 76892664, now seen corresponding path program 1 times [2020-10-29 13:21:56,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:21:56,041 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1133980573] [2020-10-29 13:21:56,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:21:56,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:21:56,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:21:56,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:21:56,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking...