/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.3 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.3.1.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-29 13:12:12,173 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-29 13:12:12,177 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-29 13:12:12,235 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-29 13:12:12,236 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-29 13:12:12,242 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-29 13:12:12,244 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-29 13:12:12,249 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-29 13:12:12,253 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-29 13:12:12,259 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-29 13:12:12,261 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-29 13:12:12,263 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-29 13:12:12,264 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-29 13:12:12,267 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-29 13:12:12,269 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-29 13:12:12,271 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-29 13:12:12,273 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-29 13:12:12,276 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-29 13:12:12,283 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-29 13:12:12,292 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-29 13:12:12,294 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-29 13:12:12,296 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-29 13:12:12,297 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-29 13:12:12,300 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-29 13:12:12,310 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-29 13:12:12,311 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-29 13:12:12,311 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-29 13:12:12,313 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-29 13:12:12,314 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-29 13:12:12,315 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-29 13:12:12,316 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-29 13:12:12,317 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-29 13:12:12,319 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-29 13:12:12,320 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-29 13:12:12,321 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-29 13:12:12,321 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-29 13:12:12,322 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-29 13:12:12,322 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-29 13:12:12,323 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-29 13:12:12,324 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-29 13:12:12,325 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-29 13:12:12,333 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 13:12:12,392 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-29 13:12:12,392 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-29 13:12:12,397 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-29 13:12:12,397 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-29 13:12:12,397 INFO L138 SettingsManager]: * Use SBE=true [2020-10-29 13:12:12,398 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-29 13:12:12,398 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-29 13:12:12,398 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-29 13:12:12,398 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-29 13:12:12,399 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-29 13:12:12,400 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-29 13:12:12,400 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-29 13:12:12,400 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-29 13:12:12,401 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-29 13:12:12,401 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-29 13:12:12,401 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-29 13:12:12,401 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-29 13:12:12,402 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-29 13:12:12,402 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-29 13:12:12,402 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-29 13:12:12,402 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-29 13:12:12,403 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 13:12:12,403 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-29 13:12:12,403 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-29 13:12:12,403 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-29 13:12:12,403 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-29 13:12:12,404 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-29 13:12:12,404 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-29 13:12:12,404 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-29 13:12:12,404 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true;unknown-allowed=true; [2020-10-29 13:12:12,784 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-29 13:12:12,829 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-29 13:12:12,832 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-29 13:12:12,833 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-29 13:12:12,834 INFO L275 PluginConnector]: CDTParser initialized [2020-10-29 13:12:12,835 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.3.1.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c [2020-10-29 13:12:12,921 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8722cdd18/5c06e01f5a6749989568a6eae21763db/FLAGef82b13f1 [2020-10-29 13:12:13,527 INFO L306 CDTParser]: Found 1 translation units. [2020-10-29 13:12:13,528 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.3.1.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c [2020-10-29 13:12:13,545 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8722cdd18/5c06e01f5a6749989568a6eae21763db/FLAGef82b13f1 [2020-10-29 13:12:13,820 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8722cdd18/5c06e01f5a6749989568a6eae21763db [2020-10-29 13:12:13,823 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-29 13:12:13,831 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-29 13:12:13,833 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-29 13:12:13,833 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-29 13:12:13,837 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-29 13:12:13,838 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 01:12:13" (1/1) ... [2020-10-29 13:12:13,842 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2b6e0d2f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:12:13, skipping insertion in model container [2020-10-29 13:12:13,842 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 01:12:13" (1/1) ... [2020-10-29 13:12:13,851 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-29 13:12:13,893 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-29 13:12:14,174 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 13:12:14,189 INFO L203 MainTranslator]: Completed pre-run [2020-10-29 13:12:14,290 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 13:12:14,313 INFO L208 MainTranslator]: Completed translation [2020-10-29 13:12:14,314 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:12:14 WrapperNode [2020-10-29 13:12:14,314 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-29 13:12:14,315 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-29 13:12:14,316 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-29 13:12:14,316 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-29 13:12:14,331 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:12:14" (1/1) ... [2020-10-29 13:12:14,332 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:12:14" (1/1) ... [2020-10-29 13:12:14,344 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:12:14" (1/1) ... [2020-10-29 13:12:14,345 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:12:14" (1/1) ... [2020-10-29 13:12:14,366 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:12:14" (1/1) ... [2020-10-29 13:12:14,380 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:12:14" (1/1) ... [2020-10-29 13:12:14,389 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:12:14" (1/1) ... [2020-10-29 13:12:14,397 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-29 13:12:14,402 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-29 13:12:14,402 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-29 13:12:14,402 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-29 13:12:14,405 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:12:14" (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 13:12:14,475 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-29 13:12:14,476 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-29 13:12:14,477 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-29 13:12:14,477 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-29 13:12:14,477 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-29 13:12:14,478 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-29 13:12:14,478 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-29 13:12:14,478 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-29 13:12:14,479 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-29 13:12:14,479 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-29 13:12:14,481 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-29 13:12:14,481 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-29 13:12:14,482 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-29 13:12:14,482 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-29 13:12:14,482 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-29 13:12:14,483 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-29 13:12:14,483 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-29 13:12:14,483 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-29 13:12:14,483 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-29 13:12:14,483 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-29 13:12:14,484 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-29 13:12:14,484 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-29 13:12:14,484 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-29 13:12:14,484 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-29 13:12:14,484 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-29 13:12:14,484 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-29 13:12:14,484 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-29 13:12:15,469 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-29 13:12:15,470 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-29 13:12:15,472 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 01:12:15 BoogieIcfgContainer [2020-10-29 13:12:15,473 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-29 13:12:15,475 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-29 13:12:15,476 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-29 13:12:15,479 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-29 13:12:15,480 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.10 01:12:13" (1/3) ... [2020-10-29 13:12:15,481 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4cad6e20 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 01:12:15, skipping insertion in model container [2020-10-29 13:12:15,481 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:12:14" (2/3) ... [2020-10-29 13:12:15,482 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4cad6e20 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 01:12:15, skipping insertion in model container [2020-10-29 13:12:15,482 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 01:12:15" (3/3) ... [2020-10-29 13:12:15,484 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.3.1.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c [2020-10-29 13:12:15,496 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-29 13:12:15,505 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-29 13:12:15,518 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-29 13:12:15,559 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-29 13:12:15,559 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-29 13:12:15,560 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-29 13:12:15,560 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-29 13:12:15,560 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-29 13:12:15,560 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-29 13:12:15,560 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-29 13:12:15,561 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-29 13:12:15,591 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states. [2020-10-29 13:12:15,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-29 13:12:15,603 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:12:15,605 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:12:15,605 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:12:15,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:12:15,615 INFO L82 PathProgramCache]: Analyzing trace with hash -1094105252, now seen corresponding path program 1 times [2020-10-29 13:12:15,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:12:15,627 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [722107438] [2020-10-29 13:12:15,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:12:15,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:12:16,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:12:16,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:12:16,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:12:16,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:12:16,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:12:17,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:12:17,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:12:20,893 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:12:20,893 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-29 13:12:20,893 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-29 13:12:20,895 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-29 13:12:20,898 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:12:20,898 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:12:20,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:12:20,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 13:12:20,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-29 13:12:20,899 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-29 13:12:21,250 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-29 13:12:21,254 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:12:21,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:12:21,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:12:21,317 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:12:21,317 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:12:21,318 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:12:21,318 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 44 [2020-10-29 13:12:21,318 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:12:21,319 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:12:21,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:12:21,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:12:21,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 13:12:21,320 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:12:21,353 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:12:21,354 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [722107438] [2020-10-29 13:12:21,357 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:12:21,357 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 13:12:21,358 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781578313] [2020-10-29 13:12:21,365 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:12:21,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:12:21,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:12:21,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:12:21,389 INFO L87 Difference]: Start difference. First operand 115 states. Second operand 6 states. [2020-10-29 13:12:21,741 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-29 13:12:22,453 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 143 [2020-10-29 13:12:22,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:12:22,680 INFO L93 Difference]: Finished difference Result 258 states and 421 transitions. [2020-10-29 13:12:22,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-29 13:12:22,682 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 53 [2020-10-29 13:12:22,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:12:22,694 INFO L225 Difference]: With dead ends: 258 [2020-10-29 13:12:22,695 INFO L226 Difference]: Without dead ends: 162 [2020-10-29 13:12:22,699 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-10-29 13:12:22,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-10-29 13:12:22,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 157. [2020-10-29 13:12:22,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-10-29 13:12:22,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 220 transitions. [2020-10-29 13:12:22,792 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 220 transitions. Word has length 53 [2020-10-29 13:12:22,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:12:22,794 INFO L481 AbstractCegarLoop]: Abstraction has 157 states and 220 transitions. [2020-10-29 13:12:22,795 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:12:22,795 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 220 transitions. [2020-10-29 13:12:22,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-29 13:12:22,797 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:12:22,798 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:12:22,798 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-29 13:12:22,798 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:12:22,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:12:22,799 INFO L82 PathProgramCache]: Analyzing trace with hash 1321190962, now seen corresponding path program 1 times [2020-10-29 13:12:22,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:12:22,800 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2130505892] [2020-10-29 13:12:22,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:12:22,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:12:22,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:12:22,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:12:22,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:12:22,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:12:23,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:12:23,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:12:25,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:12:25,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:12:25,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:12:25,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:12:27,865 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:12:27,865 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-29 13:12:27,865 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-29 13:12:27,865 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5026 [2020-10-29 13:12:27,866 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:12:27,866 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:12:27,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:12:27,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-29 13:12:27,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-29 13:12:27,867 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:12:28,075 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-29 13:12:28,076 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:12:28,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:12:28,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:12:28,094 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:12:28,094 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:12:28,095 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:12:28,095 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-29 13:12:28,095 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:12:28,096 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:12:28,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:12:28,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:12:28,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:12:28,096 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:12:28,113 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:12:28,114 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2130505892] [2020-10-29 13:12:28,114 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:12:28,114 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 13:12:28,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59468712] [2020-10-29 13:12:28,116 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:12:28,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:12:28,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:12:28,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:12:28,117 INFO L87 Difference]: Start difference. First operand 157 states and 220 transitions. Second operand 6 states. [2020-10-29 13:12:28,318 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-29 13:12:28,763 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2020-10-29 13:12:28,926 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 138 [2020-10-29 13:12:29,628 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2020-10-29 13:12:29,814 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2020-10-29 13:12:29,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:12:29,826 INFO L93 Difference]: Finished difference Result 701 states and 1056 transitions. [2020-10-29 13:12:29,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-29 13:12:29,827 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 54 [2020-10-29 13:12:29,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:12:29,837 INFO L225 Difference]: With dead ends: 701 [2020-10-29 13:12:29,837 INFO L226 Difference]: Without dead ends: 619 [2020-10-29 13:12:29,840 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2020-10-29 13:12:29,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 619 states. [2020-10-29 13:12:29,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 619 to 255. [2020-10-29 13:12:29,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 255 states. [2020-10-29 13:12:29,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 369 transitions. [2020-10-29 13:12:29,914 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 369 transitions. Word has length 54 [2020-10-29 13:12:29,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:12:29,914 INFO L481 AbstractCegarLoop]: Abstraction has 255 states and 369 transitions. [2020-10-29 13:12:29,915 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:12:29,915 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 369 transitions. [2020-10-29 13:12:29,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-29 13:12:29,917 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:12:29,917 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:12:29,917 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-29 13:12:29,918 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:12:29,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:12:29,918 INFO L82 PathProgramCache]: Analyzing trace with hash 1383996859, now seen corresponding path program 1 times [2020-10-29 13:12:29,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:12:29,919 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [276037606] [2020-10-29 13:12:29,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:12:29,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:12:29,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:12:29,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:12:30,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:12:30,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:12:30,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:12:30,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:12:30,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:12:31,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:12:31,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:12:34,958 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:12:34,958 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-29 13:12:34,959 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-29 13:12:34,959 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-29 13:12:34,959 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:12:34,959 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:12:34,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:12:34,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-29 13:12:34,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-29 13:12:34,960 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:12:35,257 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-29 13:12:35,261 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:12:35,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:12:35,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:12:35,280 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:12:35,280 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:12:35,281 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:12:35,281 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-29 13:12:35,281 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:12:35,282 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:12:35,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:12:35,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:12:35,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:12:35,283 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:12:35,304 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 13:12:35,305 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [276037606] [2020-10-29 13:12:35,305 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:12:35,306 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 13:12:35,306 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468989016] [2020-10-29 13:12:35,308 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:12:35,308 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:12:35,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:12:35,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:12:35,309 INFO L87 Difference]: Start difference. First operand 255 states and 369 transitions. Second operand 6 states. [2020-10-29 13:12:35,552 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 147 [2020-10-29 13:12:36,049 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-29 13:12:36,287 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2020-10-29 13:12:37,027 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 144 [2020-10-29 13:12:37,228 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-29 13:12:37,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:12:37,251 INFO L93 Difference]: Finished difference Result 780 states and 1163 transitions. [2020-10-29 13:12:37,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-29 13:12:37,257 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 55 [2020-10-29 13:12:37,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:12:37,260 INFO L225 Difference]: With dead ends: 780 [2020-10-29 13:12:37,261 INFO L226 Difference]: Without dead ends: 617 [2020-10-29 13:12:37,263 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2020-10-29 13:12:37,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 617 states. [2020-10-29 13:12:37,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 617 to 259. [2020-10-29 13:12:37,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 259 states. [2020-10-29 13:12:37,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 371 transitions. [2020-10-29 13:12:37,306 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 371 transitions. Word has length 55 [2020-10-29 13:12:37,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:12:37,316 INFO L481 AbstractCegarLoop]: Abstraction has 259 states and 371 transitions. [2020-10-29 13:12:37,316 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:12:37,317 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 371 transitions. [2020-10-29 13:12:37,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-29 13:12:37,319 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:12:37,319 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:12:37,320 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-29 13:12:37,321 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:12:37,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:12:37,321 INFO L82 PathProgramCache]: Analyzing trace with hash 620067600, now seen corresponding path program 1 times [2020-10-29 13:12:37,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:12:37,322 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [336136171] [2020-10-29 13:12:37,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:12:37,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:12:37,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:12:37,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:12:37,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:12:37,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:12:38,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:12:38,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:12:38,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:12:38,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:12:38,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:12:39,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:12:40,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:12:42,362 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:12:42,363 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-29 13:12:42,363 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-29 13:12:42,363 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-29 13:12:42,363 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:12:42,364 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:12:42,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:12:42,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-29 13:12:42,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-29 13:12:42,364 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:12:42,590 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-29 13:12:42,591 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:12:42,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:12:42,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:12:42,611 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:12:42,611 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:12:42,611 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:12:42,612 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-29 13:12:42,612 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:12:42,612 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:12:42,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:12:42,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:12:42,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:12:42,613 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:12:42,627 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 13:12:42,628 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [336136171] [2020-10-29 13:12:42,628 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:12:42,628 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 13:12:42,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603456125] [2020-10-29 13:12:42,629 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:12:42,629 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:12:42,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:12:42,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:12:42,631 INFO L87 Difference]: Start difference. First operand 259 states and 371 transitions. Second operand 6 states. [2020-10-29 13:12:43,075 WARN L193 SmtUtils]: Spent 390.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 140 [2020-10-29 13:12:43,540 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 138 [2020-10-29 13:12:43,751 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-29 13:12:43,987 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 141 [2020-10-29 13:12:44,201 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2020-10-29 13:12:44,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:12:44,515 INFO L93 Difference]: Finished difference Result 1000 states and 1494 transitions. [2020-10-29 13:12:44,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-29 13:12:44,516 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 56 [2020-10-29 13:12:44,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:12:44,521 INFO L225 Difference]: With dead ends: 1000 [2020-10-29 13:12:44,522 INFO L226 Difference]: Without dead ends: 839 [2020-10-29 13:12:44,528 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2020-10-29 13:12:44,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 839 states. [2020-10-29 13:12:44,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 839 to 820. [2020-10-29 13:12:44,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 820 states. [2020-10-29 13:12:44,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 820 states to 820 states and 1222 transitions. [2020-10-29 13:12:44,609 INFO L78 Accepts]: Start accepts. Automaton has 820 states and 1222 transitions. Word has length 56 [2020-10-29 13:12:44,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:12:44,612 INFO L481 AbstractCegarLoop]: Abstraction has 820 states and 1222 transitions. [2020-10-29 13:12:44,613 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:12:44,613 INFO L276 IsEmpty]: Start isEmpty. Operand 820 states and 1222 transitions. [2020-10-29 13:12:44,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-29 13:12:44,621 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:12:44,622 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:12:44,622 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-29 13:12:44,622 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:12:44,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:12:44,623 INFO L82 PathProgramCache]: Analyzing trace with hash 67831113, now seen corresponding path program 1 times [2020-10-29 13:12:44,623 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:12:44,623 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [197924971] [2020-10-29 13:12:44,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:12:44,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:12:44,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:12:44,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:12:44,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:12:44,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:12:45,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:12:45,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:12:45,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:12:47,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:12:47,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:12:47,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:12:47,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:12:47,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:12:49,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:12:49,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:12:49,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:12:49,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:12:49,665 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:12:49,665 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-29 13:12:49,665 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-29 13:12:49,665 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-29 13:12:49,666 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:12:49,666 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:12:49,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:12:49,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-29 13:12:49,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-29 13:12:49,667 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:12:49,897 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-29 13:12:49,898 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:12:49,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:12:49,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:12:49,925 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:12:49,926 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:12:49,926 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:12:49,926 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-29 13:12:49,928 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:12:49,929 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:12:49,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:12:49,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:12:49,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:12:49,930 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:12:49,946 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 13:12:49,946 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [197924971] [2020-10-29 13:12:49,947 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:12:49,947 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 13:12:49,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122560289] [2020-10-29 13:12:49,949 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:12:49,949 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:12:49,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:12:49,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:12:49,956 INFO L87 Difference]: Start difference. First operand 820 states and 1222 transitions. Second operand 6 states. [2020-10-29 13:12:50,191 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 143 [2020-10-29 13:12:50,630 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 138 [2020-10-29 13:12:50,826 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 141 [2020-10-29 13:12:51,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:12:51,127 INFO L93 Difference]: Finished difference Result 1830 states and 2764 transitions. [2020-10-29 13:12:51,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-29 13:12:51,128 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 56 [2020-10-29 13:12:51,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:12:51,138 INFO L225 Difference]: With dead ends: 1830 [2020-10-29 13:12:51,138 INFO L226 Difference]: Without dead ends: 1132 [2020-10-29 13:12:51,140 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-10-29 13:12:51,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1132 states. [2020-10-29 13:12:51,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1132 to 1064. [2020-10-29 13:12:51,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1064 states. [2020-10-29 13:12:51,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1064 states to 1064 states and 1601 transitions. [2020-10-29 13:12:51,237 INFO L78 Accepts]: Start accepts. Automaton has 1064 states and 1601 transitions. Word has length 56 [2020-10-29 13:12:51,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:12:51,237 INFO L481 AbstractCegarLoop]: Abstraction has 1064 states and 1601 transitions. [2020-10-29 13:12:51,237 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:12:51,237 INFO L276 IsEmpty]: Start isEmpty. Operand 1064 states and 1601 transitions. [2020-10-29 13:12:51,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-29 13:12:51,239 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:12:51,240 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:12:51,240 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-29 13:12:51,240 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:12:51,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:12:51,241 INFO L82 PathProgramCache]: Analyzing trace with hash 299488742, now seen corresponding path program 1 times [2020-10-29 13:12:51,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:12:51,241 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1584173714] [2020-10-29 13:12:51,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:12:51,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:12:51,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:12:51,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:12:51,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:12:51,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:12:51,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:12:51,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:12:52,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:12:52,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:12:52,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:12:52,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:12:52,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:12:52,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:12:53,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:12:53,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:12:54,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:12:54,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:12:54,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:12:56,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:12:56,268 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:12:56,268 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-29 13:12:56,269 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 18 [2020-10-29 13:12:56,269 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-29 13:12:56,269 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:12:56,269 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:12:56,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:12:56,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-29 13:12:56,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-29 13:12:56,269 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:12:56,562 WARN L193 SmtUtils]: Spent 240.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-29 13:12:56,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:12:56,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:12:56,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:12:56,583 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:12:56,584 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:12:56,584 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:12:56,584 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-29 13:12:56,584 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:12:56,585 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:12:56,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:12:56,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:12:56,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:12:56,585 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:12:56,604 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 13:12:56,604 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1584173714] [2020-10-29 13:12:56,606 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:12:56,607 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 13:12:56,608 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634668342] [2020-10-29 13:12:56,608 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:12:56,609 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:12:56,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:12:56,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:12:56,610 INFO L87 Difference]: Start difference. First operand 1064 states and 1601 transitions. Second operand 6 states. [2020-10-29 13:12:56,950 WARN L193 SmtUtils]: Spent 274.00 ms on a formula simplification that was a NOOP. DAG size: 143 [2020-10-29 13:12:57,388 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 141 [2020-10-29 13:12:57,586 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2020-10-29 13:12:57,826 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 138 [2020-10-29 13:12:58,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:12:58,189 INFO L93 Difference]: Finished difference Result 2923 states and 4432 transitions. [2020-10-29 13:12:58,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-29 13:12:58,190 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 56 [2020-10-29 13:12:58,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:12:58,204 INFO L225 Difference]: With dead ends: 2923 [2020-10-29 13:12:58,205 INFO L226 Difference]: Without dead ends: 1988 [2020-10-29 13:12:58,208 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-10-29 13:12:58,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1988 states. [2020-10-29 13:12:58,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1988 to 1312. [2020-10-29 13:12:58,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1312 states. [2020-10-29 13:12:58,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1312 states to 1312 states and 1978 transitions. [2020-10-29 13:12:58,322 INFO L78 Accepts]: Start accepts. Automaton has 1312 states and 1978 transitions. Word has length 56 [2020-10-29 13:12:58,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:12:58,323 INFO L481 AbstractCegarLoop]: Abstraction has 1312 states and 1978 transitions. [2020-10-29 13:12:58,324 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:12:58,324 INFO L276 IsEmpty]: Start isEmpty. Operand 1312 states and 1978 transitions. [2020-10-29 13:12:58,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-29 13:12:58,324 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:12:58,325 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:12:58,325 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-29 13:12:58,325 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:12:58,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:12:58,326 INFO L82 PathProgramCache]: Analyzing trace with hash 1124009117, now seen corresponding path program 1 times [2020-10-29 13:12:58,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:12:58,326 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [129674947] [2020-10-29 13:12:58,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:12:58,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:12:58,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:12:58,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:12:58,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:12:58,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:12:58,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:12:58,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:12:59,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:00,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:00,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:03,351 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:13:03,351 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-29 13:13:03,351 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-29 13:13:03,352 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-29 13:13:03,352 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:13:03,352 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:13:03,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-29 13:13:03,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:13:03,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-29 13:13:03,352 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:13:03,811 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-29 13:13:03,813 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:13:03,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:13:03,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:03,835 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:13:03,836 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:13:03,836 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:13:03,836 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-29 13:13:03,837 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:13:03,837 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:13:03,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:13:03,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:13:03,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:13:03,838 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:13:03,855 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 13:13:03,861 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [129674947] [2020-10-29 13:13:03,861 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:13:03,861 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-29 13:13:03,862 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659209869] [2020-10-29 13:13:03,862 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-29 13:13:03,862 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:13:03,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-29 13:13:03,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-29 13:13:03,864 INFO L87 Difference]: Start difference. First operand 1312 states and 1978 transitions. Second operand 10 states. [2020-10-29 13:13:04,104 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 143 [2020-10-29 13:13:05,011 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-29 13:13:05,254 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2020-10-29 13:13:05,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:13:05,821 INFO L93 Difference]: Finished difference Result 2459 states and 3731 transitions. [2020-10-29 13:13:05,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-29 13:13:05,822 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 57 [2020-10-29 13:13:05,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:13:05,832 INFO L225 Difference]: With dead ends: 2459 [2020-10-29 13:13:05,832 INFO L226 Difference]: Without dead ends: 1885 [2020-10-29 13:13:05,835 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2020-10-29 13:13:05,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1885 states. [2020-10-29 13:13:06,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1885 to 1288. [2020-10-29 13:13:06,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1288 states. [2020-10-29 13:13:06,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1288 states to 1288 states and 1942 transitions. [2020-10-29 13:13:06,083 INFO L78 Accepts]: Start accepts. Automaton has 1288 states and 1942 transitions. Word has length 57 [2020-10-29 13:13:06,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:13:06,083 INFO L481 AbstractCegarLoop]: Abstraction has 1288 states and 1942 transitions. [2020-10-29 13:13:06,083 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-29 13:13:06,084 INFO L276 IsEmpty]: Start isEmpty. Operand 1288 states and 1942 transitions. [2020-10-29 13:13:06,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-29 13:13:06,085 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:13:06,085 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:13:06,085 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-29 13:13:06,085 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:13:06,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:13:06,086 INFO L82 PathProgramCache]: Analyzing trace with hash 1184547204, now seen corresponding path program 1 times [2020-10-29 13:13:06,086 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:13:06,087 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1628238265] [2020-10-29 13:13:06,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:13:06,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:13:06,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:06,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:06,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:06,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:06,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:06,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:06,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:07,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:08,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:08,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:10,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:10,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:10,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:10,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:10,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:11,113 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:13:11,114 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-29 13:13:11,114 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-29 13:13:11,114 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-29 13:13:11,114 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:13:11,114 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:13:11,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:13:11,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 13:13:11,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-29 13:13:11,115 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:13:11,369 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-29 13:13:11,370 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:13:11,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:13:11,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:11,401 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:13:11,401 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:13:11,403 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:13:11,404 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-29 13:13:11,404 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:13:11,404 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:13:11,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:13:11,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:13:11,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 13:13:11,405 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:13:11,425 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 13:13:11,425 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1628238265] [2020-10-29 13:13:11,425 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:13:11,425 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 13:13:11,427 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967134295] [2020-10-29 13:13:11,428 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:13:11,428 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:13:11,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:13:11,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:13:11,430 INFO L87 Difference]: Start difference. First operand 1288 states and 1942 transitions. Second operand 6 states. [2020-10-29 13:13:11,647 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-29 13:13:12,069 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 143 [2020-10-29 13:13:12,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:13:12,513 INFO L93 Difference]: Finished difference Result 3713 states and 5620 transitions. [2020-10-29 13:13:12,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-29 13:13:12,514 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 57 [2020-10-29 13:13:12,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:13:12,526 INFO L225 Difference]: With dead ends: 3713 [2020-10-29 13:13:12,526 INFO L226 Difference]: Without dead ends: 2460 [2020-10-29 13:13:12,530 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-10-29 13:13:12,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2460 states. [2020-10-29 13:13:12,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2460 to 2455. [2020-10-29 13:13:12,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2455 states. [2020-10-29 13:13:12,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2455 states to 2455 states and 3680 transitions. [2020-10-29 13:13:12,855 INFO L78 Accepts]: Start accepts. Automaton has 2455 states and 3680 transitions. Word has length 57 [2020-10-29 13:13:12,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:13:12,855 INFO L481 AbstractCegarLoop]: Abstraction has 2455 states and 3680 transitions. [2020-10-29 13:13:12,855 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:13:12,855 INFO L276 IsEmpty]: Start isEmpty. Operand 2455 states and 3680 transitions. [2020-10-29 13:13:12,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-29 13:13:12,856 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:13:12,856 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:13:12,856 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-29 13:13:12,856 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:13:12,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:13:12,857 INFO L82 PathProgramCache]: Analyzing trace with hash -68550645, now seen corresponding path program 1 times [2020-10-29 13:13:12,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:13:12,858 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [699434067] [2020-10-29 13:13:12,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:13:12,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:13:12,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:12,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:13,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:13,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:13,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:13,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:13,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:13,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:13,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:14,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:14,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:16,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:16,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:16,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:16,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:16,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:16,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:17,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:17,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:17,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:17,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:17,885 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:13:17,886 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-29 13:13:17,886 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 21 [2020-10-29 13:13:17,886 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-29 13:13:17,886 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:13:17,887 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:13:17,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 13:13:17,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:13:17,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-29 13:13:17,887 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:13:18,050 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 26 [2020-10-29 13:13:18,265 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-29 13:13:18,266 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:13:18,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:13:18,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:18,276 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:13:18,276 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:13:18,276 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:13:18,277 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 13:13:18,277 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:13:18,277 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:13:18,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:13:18,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:13:18,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:13:18,277 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:13:18,289 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 13:13:18,289 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [699434067] [2020-10-29 13:13:18,289 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:13:18,289 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-29 13:13:18,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335434448] [2020-10-29 13:13:18,290 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 13:13:18,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:13:18,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 13:13:18,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-29 13:13:18,291 INFO L87 Difference]: Start difference. First operand 2455 states and 3680 transitions. Second operand 8 states. [2020-10-29 13:13:18,557 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2020-10-29 13:13:19,346 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 144 [2020-10-29 13:13:20,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:13:20,083 INFO L93 Difference]: Finished difference Result 5998 states and 9026 transitions. [2020-10-29 13:13:20,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-29 13:13:20,084 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 58 [2020-10-29 13:13:20,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:13:20,102 INFO L225 Difference]: With dead ends: 5998 [2020-10-29 13:13:20,103 INFO L226 Difference]: Without dead ends: 3629 [2020-10-29 13:13:20,108 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2020-10-29 13:13:20,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3629 states. [2020-10-29 13:13:20,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3629 to 2455. [2020-10-29 13:13:20,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2455 states. [2020-10-29 13:13:20,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2455 states to 2455 states and 3679 transitions. [2020-10-29 13:13:20,457 INFO L78 Accepts]: Start accepts. Automaton has 2455 states and 3679 transitions. Word has length 58 [2020-10-29 13:13:20,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:13:20,458 INFO L481 AbstractCegarLoop]: Abstraction has 2455 states and 3679 transitions. [2020-10-29 13:13:20,458 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 13:13:20,458 INFO L276 IsEmpty]: Start isEmpty. Operand 2455 states and 3679 transitions. [2020-10-29 13:13:20,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-29 13:13:20,459 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:13:20,459 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:13:20,460 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-29 13:13:20,460 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:13:20,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:13:20,460 INFO L82 PathProgramCache]: Analyzing trace with hash -1477098738, now seen corresponding path program 1 times [2020-10-29 13:13:20,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:13:20,461 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1405335262] [2020-10-29 13:13:20,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:13:20,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:13:20,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:20,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:20,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:20,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:21,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:21,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:21,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:22,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:22,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:23,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:25,483 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:13:25,483 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-29 13:13:25,483 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-29 13:13:25,483 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-29 13:13:25,483 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:13:25,484 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:13:25,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-29 13:13:25,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:13:25,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-29 13:13:25,484 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:13:25,835 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-29 13:13:25,836 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:13:25,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:13:25,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:25,853 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:13:25,853 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:13:25,854 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:13:25,854 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-29 13:13:25,854 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:13:25,854 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:13:25,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:13:25,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:13:25,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:13:25,855 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:13:25,877 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 13:13:25,877 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1405335262] [2020-10-29 13:13:25,877 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:13:25,877 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-29 13:13:25,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035564973] [2020-10-29 13:13:25,878 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-29 13:13:25,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:13:25,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-29 13:13:25,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-29 13:13:25,879 INFO L87 Difference]: Start difference. First operand 2455 states and 3679 transitions. Second operand 9 states. [2020-10-29 13:13:26,133 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-10-29 13:13:26,890 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification that was a NOOP. DAG size: 150 [2020-10-29 13:13:27,130 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-29 13:13:27,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:13:27,942 INFO L93 Difference]: Finished difference Result 5958 states and 8976 transitions. [2020-10-29 13:13:27,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-29 13:13:27,942 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 58 [2020-10-29 13:13:27,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:13:27,959 INFO L225 Difference]: With dead ends: 5958 [2020-10-29 13:13:27,960 INFO L226 Difference]: Without dead ends: 3589 [2020-10-29 13:13:27,966 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2020-10-29 13:13:27,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3589 states. [2020-10-29 13:13:28,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3589 to 2415. [2020-10-29 13:13:28,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2415 states. [2020-10-29 13:13:28,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2415 states to 2415 states and 3623 transitions. [2020-10-29 13:13:28,468 INFO L78 Accepts]: Start accepts. Automaton has 2415 states and 3623 transitions. Word has length 58 [2020-10-29 13:13:28,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:13:28,468 INFO L481 AbstractCegarLoop]: Abstraction has 2415 states and 3623 transitions. [2020-10-29 13:13:28,469 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-29 13:13:28,469 INFO L276 IsEmpty]: Start isEmpty. Operand 2415 states and 3623 transitions. [2020-10-29 13:13:28,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-29 13:13:28,469 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:13:28,470 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] [2020-10-29 13:13:28,470 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-29 13:13:28,470 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:13:28,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:13:28,471 INFO L82 PathProgramCache]: Analyzing trace with hash 634111900, now seen corresponding path program 1 times [2020-10-29 13:13:28,471 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:13:28,471 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [378010258] [2020-10-29 13:13:28,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:13:28,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:13:28,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:28,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:28,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:28,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:28,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:29,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:29,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:29,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:29,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:29,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:29,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:29,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:30,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:30,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:31,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:31,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:31,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:31,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:31,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:32,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:33,495 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:13:33,496 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-29 13:13:33,496 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 20 [2020-10-29 13:13:33,496 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-29 13:13:33,496 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:13:33,497 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:13:33,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-29 13:13:33,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 13:13:33,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-29 13:13:33,497 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:13:33,782 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-29 13:13:33,783 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:13:33,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:13:33,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:33,802 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:13:33,802 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:13:33,802 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:13:33,802 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-29 13:13:33,802 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:13:33,802 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:13:33,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:13:33,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:13:33,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 13:13:33,803 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:13:33,819 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 13:13:33,819 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [378010258] [2020-10-29 13:13:33,819 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:13:33,820 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-29 13:13:33,820 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267321150] [2020-10-29 13:13:33,820 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-29 13:13:33,821 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:13:33,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-29 13:13:33,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-10-29 13:13:33,821 INFO L87 Difference]: Start difference. First operand 2415 states and 3623 transitions. Second operand 9 states. [2020-10-29 13:13:34,061 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2020-10-29 13:13:34,719 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 143 [2020-10-29 13:13:35,734 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-29 13:13:38,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:13:38,414 INFO L93 Difference]: Finished difference Result 22144 states and 33062 transitions. [2020-10-29 13:13:38,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-29 13:13:38,414 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 59 [2020-10-29 13:13:38,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:13:38,488 INFO L225 Difference]: With dead ends: 22144 [2020-10-29 13:13:38,488 INFO L226 Difference]: Without dead ends: 19778 [2020-10-29 13:13:38,500 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=134, Invalid=372, Unknown=0, NotChecked=0, Total=506 [2020-10-29 13:13:38,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19778 states. [2020-10-29 13:13:39,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19778 to 2437. [2020-10-29 13:13:39,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2437 states. [2020-10-29 13:13:39,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2437 states to 2437 states and 3586 transitions. [2020-10-29 13:13:39,306 INFO L78 Accepts]: Start accepts. Automaton has 2437 states and 3586 transitions. Word has length 59 [2020-10-29 13:13:39,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:13:39,306 INFO L481 AbstractCegarLoop]: Abstraction has 2437 states and 3586 transitions. [2020-10-29 13:13:39,306 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-29 13:13:39,306 INFO L276 IsEmpty]: Start isEmpty. Operand 2437 states and 3586 transitions. [2020-10-29 13:13:39,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-29 13:13:39,307 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:13:39,307 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] [2020-10-29 13:13:39,307 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-29 13:13:39,308 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:13:39,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:13:39,308 INFO L82 PathProgramCache]: Analyzing trace with hash -677495935, now seen corresponding path program 1 times [2020-10-29 13:13:39,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:13:39,309 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1493671992] [2020-10-29 13:13:39,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:13:39,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:13:39,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:39,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:39,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:39,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:39,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:39,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:40,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:40,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:40,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:40,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:41,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:41,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:41,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:44,332 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:13:44,332 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-29 13:13:44,333 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-29 13:13:44,333 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-29 13:13:44,333 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:13:44,333 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:13:44,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-29 13:13:44,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:13:44,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-29 13:13:44,333 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:13:44,516 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 27 [2020-10-29 13:13:44,752 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-29 13:13:44,753 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:13:44,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:13:44,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:44,765 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:13:44,766 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:13:44,766 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:13:44,766 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-29 13:13:44,766 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:13:44,767 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:13:44,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:13:44,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:13:44,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:13:44,767 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:13:44,783 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 13:13:44,783 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1493671992] [2020-10-29 13:13:44,783 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:13:44,784 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-29 13:13:44,784 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670698215] [2020-10-29 13:13:44,784 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-29 13:13:44,784 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:13:44,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-29 13:13:44,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-29 13:13:44,785 INFO L87 Difference]: Start difference. First operand 2437 states and 3586 transitions. Second operand 9 states. [2020-10-29 13:13:45,089 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-10-29 13:13:45,995 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 144 [2020-10-29 13:13:47,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:13:47,192 INFO L93 Difference]: Finished difference Result 6000 states and 8852 transitions. [2020-10-29 13:13:47,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-29 13:13:47,193 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 60 [2020-10-29 13:13:47,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:13:47,199 INFO L225 Difference]: With dead ends: 6000 [2020-10-29 13:13:47,200 INFO L226 Difference]: Without dead ends: 3669 [2020-10-29 13:13:47,206 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=97, Invalid=323, Unknown=0, NotChecked=0, Total=420 [2020-10-29 13:13:47,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3669 states. [2020-10-29 13:13:47,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3669 to 2437. [2020-10-29 13:13:47,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2437 states. [2020-10-29 13:13:47,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2437 states to 2437 states and 3583 transitions. [2020-10-29 13:13:47,747 INFO L78 Accepts]: Start accepts. Automaton has 2437 states and 3583 transitions. Word has length 60 [2020-10-29 13:13:47,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:13:47,747 INFO L481 AbstractCegarLoop]: Abstraction has 2437 states and 3583 transitions. [2020-10-29 13:13:47,747 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-29 13:13:47,747 INFO L276 IsEmpty]: Start isEmpty. Operand 2437 states and 3583 transitions. [2020-10-29 13:13:47,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-29 13:13:47,748 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:13:47,748 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] [2020-10-29 13:13:47,748 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-29 13:13:47,748 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:13:47,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:13:47,748 INFO L82 PathProgramCache]: Analyzing trace with hash -2065198732, now seen corresponding path program 1 times [2020-10-29 13:13:47,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:13:47,749 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [284960502] [2020-10-29 13:13:47,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:13:47,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:13:47,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:47,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:47,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:48,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:48,892 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:13:48,892 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-29 13:13:48,892 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 13:13:48,893 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1096 [2020-10-29 13:13:48,893 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:13:48,893 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:13:48,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-29 13:13:48,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:13:48,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-29 13:13:48,893 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:13:49,286 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-29 13:13:49,288 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:13:49,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:13:49,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:49,298 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:13:49,299 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:13:49,299 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:13:49,299 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-29 13:13:49,299 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:13:49,299 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:13:49,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:13:49,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:13:49,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:13:49,299 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:13:49,311 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 13:13:49,311 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [284960502] [2020-10-29 13:13:49,311 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:13:49,311 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-29 13:13:49,312 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839393653] [2020-10-29 13:13:49,312 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-29 13:13:49,312 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:13:49,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-29 13:13:49,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-29 13:13:49,313 INFO L87 Difference]: Start difference. First operand 2437 states and 3583 transitions. Second operand 10 states. [2020-10-29 13:13:49,574 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 143 [2020-10-29 13:13:51,084 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-29 13:13:51,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:13:51,832 INFO L93 Difference]: Finished difference Result 6606 states and 9796 transitions. [2020-10-29 13:13:51,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-29 13:13:51,833 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 61 [2020-10-29 13:13:51,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:13:51,844 INFO L225 Difference]: With dead ends: 6606 [2020-10-29 13:13:51,844 INFO L226 Difference]: Without dead ends: 4744 [2020-10-29 13:13:51,849 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2020-10-29 13:13:51,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4744 states. [2020-10-29 13:13:52,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4744 to 2418. [2020-10-29 13:13:52,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2418 states. [2020-10-29 13:13:52,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2418 states to 2418 states and 3560 transitions. [2020-10-29 13:13:52,476 INFO L78 Accepts]: Start accepts. Automaton has 2418 states and 3560 transitions. Word has length 61 [2020-10-29 13:13:52,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:13:52,477 INFO L481 AbstractCegarLoop]: Abstraction has 2418 states and 3560 transitions. [2020-10-29 13:13:52,477 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-29 13:13:52,477 INFO L276 IsEmpty]: Start isEmpty. Operand 2418 states and 3560 transitions. [2020-10-29 13:13:52,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-29 13:13:52,479 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:13:52,479 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:13:52,479 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-29 13:13:52,479 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:13:52,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:13:52,480 INFO L82 PathProgramCache]: Analyzing trace with hash -465535069, now seen corresponding path program 1 times [2020-10-29 13:13:52,480 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:13:52,480 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [240152200] [2020-10-29 13:13:52,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:13:52,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:13:52,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:52,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:52,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:52,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:52,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:53,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:53,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:56,482 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:13:56,482 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-29 13:13:56,483 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-29 13:13:56,483 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3986 [2020-10-29 13:13:56,483 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:13:56,483 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:13:56,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:13:56,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 13:13:56,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 67 [2020-10-29 13:13:56,483 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:13:56,743 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-29 13:13:56,744 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:13:56,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:13:56,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:56,755 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:13:56,755 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:13:56,755 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:13:56,755 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 13:13:56,755 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:13:56,756 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:13:56,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:13:56,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:13:56,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:13:56,756 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:13:56,770 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 13:13:56,771 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [240152200] [2020-10-29 13:13:56,771 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:13:56,771 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 13:13:56,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810613783] [2020-10-29 13:13:56,771 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:13:56,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:13:56,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:13:56,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:13:56,772 INFO L87 Difference]: Start difference. First operand 2418 states and 3560 transitions. Second operand 6 states. [2020-10-29 13:13:56,995 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2020-10-29 13:13:57,952 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 138 [2020-10-29 13:13:58,199 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-29 13:13:59,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:13:59,269 INFO L93 Difference]: Finished difference Result 8011 states and 11786 transitions. [2020-10-29 13:13:59,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-29 13:13:59,269 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 79 [2020-10-29 13:13:59,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:13:59,283 INFO L225 Difference]: With dead ends: 8011 [2020-10-29 13:13:59,283 INFO L226 Difference]: Without dead ends: 5700 [2020-10-29 13:13:59,290 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2020-10-29 13:13:59,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5700 states. [2020-10-29 13:14:00,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5700 to 5694. [2020-10-29 13:14:00,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5694 states. [2020-10-29 13:14:00,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5694 states to 5694 states and 8220 transitions. [2020-10-29 13:14:00,807 INFO L78 Accepts]: Start accepts. Automaton has 5694 states and 8220 transitions. Word has length 79 [2020-10-29 13:14:00,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:14:00,808 INFO L481 AbstractCegarLoop]: Abstraction has 5694 states and 8220 transitions. [2020-10-29 13:14:00,808 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:14:00,808 INFO L276 IsEmpty]: Start isEmpty. Operand 5694 states and 8220 transitions. [2020-10-29 13:14:00,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-29 13:14:00,809 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:14:00,810 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:14:00,810 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-29 13:14:00,810 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:14:00,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:14:00,810 INFO L82 PathProgramCache]: Analyzing trace with hash -2125858053, now seen corresponding path program 1 times [2020-10-29 13:14:00,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:14:00,810 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1877610157] [2020-10-29 13:14:00,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:14:00,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:14:00,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:00,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:00,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:01,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:01,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:02,927 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:14:02,927 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-29 13:14:02,927 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 13:14:02,927 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2096 [2020-10-29 13:14:02,927 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:14:02,928 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:14:02,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:14:02,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 13:14:02,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-29 13:14:02,928 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:14:03,169 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-29 13:14:03,170 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:14:03,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:14:03,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:03,192 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:14:03,193 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:14:03,193 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:14:03,193 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-29 13:14:03,193 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:14:03,193 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:14:03,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:14:03,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:14:03,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 13:14:03,194 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:14:03,207 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:14:03,207 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1877610157] [2020-10-29 13:14:03,207 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:14:03,207 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 13:14:03,207 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626852746] [2020-10-29 13:14:03,208 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:14:03,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:14:03,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:14:03,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:14:03,208 INFO L87 Difference]: Start difference. First operand 5694 states and 8220 transitions. Second operand 6 states. [2020-10-29 13:14:03,451 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-29 13:14:04,487 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 143 [2020-10-29 13:14:06,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:14:06,838 INFO L93 Difference]: Finished difference Result 16573 states and 24138 transitions. [2020-10-29 13:14:06,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-29 13:14:06,839 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 80 [2020-10-29 13:14:06,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:14:06,854 INFO L225 Difference]: With dead ends: 16573 [2020-10-29 13:14:06,854 INFO L226 Difference]: Without dead ends: 10947 [2020-10-29 13:14:06,864 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-10-29 13:14:06,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10947 states. [2020-10-29 13:14:09,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10947 to 10944. [2020-10-29 13:14:09,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10944 states. [2020-10-29 13:14:09,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10944 states to 10944 states and 15832 transitions. [2020-10-29 13:14:09,627 INFO L78 Accepts]: Start accepts. Automaton has 10944 states and 15832 transitions. Word has length 80 [2020-10-29 13:14:09,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:14:09,628 INFO L481 AbstractCegarLoop]: Abstraction has 10944 states and 15832 transitions. [2020-10-29 13:14:09,628 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:14:09,628 INFO L276 IsEmpty]: Start isEmpty. Operand 10944 states and 15832 transitions. [2020-10-29 13:14:09,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-29 13:14:09,630 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:14:09,630 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:14:09,630 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-29 13:14:09,630 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:14:09,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:14:09,630 INFO L82 PathProgramCache]: Analyzing trace with hash -282240970, now seen corresponding path program 1 times [2020-10-29 13:14:09,631 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:14:09,631 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1302504314] [2020-10-29 13:14:09,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:14:09,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:14:09,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:09,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:09,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:09,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:09,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:10,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:11,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:13,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:14,696 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:14:14,697 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-29 13:14:14,697 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-29 13:14:14,697 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5042 [2020-10-29 13:14:14,697 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:14:14,697 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:14:14,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-29 13:14:14,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:14:14,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-29 13:14:14,698 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:14:15,065 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-29 13:14:15,066 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:14:15,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:14:15,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:15,079 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:14:15,080 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:14:15,080 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:14:15,080 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-29 13:14:15,080 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:14:15,080 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:14:15,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:14:15,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:14:15,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:14:15,081 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:14:15,095 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:14:15,096 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1302504314] [2020-10-29 13:14:15,098 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:14:15,098 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-29 13:14:15,098 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410495499] [2020-10-29 13:14:15,099 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-29 13:14:15,099 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:14:15,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-29 13:14:15,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-29 13:14:15,099 INFO L87 Difference]: Start difference. First operand 10944 states and 15832 transitions. Second operand 9 states. [2020-10-29 13:14:15,377 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-10-29 13:14:18,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:14:18,817 INFO L93 Difference]: Finished difference Result 21820 states and 31592 transitions. [2020-10-29 13:14:18,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-29 13:14:18,818 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 81 [2020-10-29 13:14:18,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:14:18,828 INFO L225 Difference]: With dead ends: 21820 [2020-10-29 13:14:18,828 INFO L226 Difference]: Without dead ends: 10944 [2020-10-29 13:14:18,844 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-10-29 13:14:18,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10944 states. [2020-10-29 13:14:22,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10944 to 10944. [2020-10-29 13:14:22,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10944 states. [2020-10-29 13:14:22,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10944 states to 10944 states and 15831 transitions. [2020-10-29 13:14:22,046 INFO L78 Accepts]: Start accepts. Automaton has 10944 states and 15831 transitions. Word has length 81 [2020-10-29 13:14:22,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:14:22,046 INFO L481 AbstractCegarLoop]: Abstraction has 10944 states and 15831 transitions. [2020-10-29 13:14:22,046 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-29 13:14:22,046 INFO L276 IsEmpty]: Start isEmpty. Operand 10944 states and 15831 transitions. [2020-10-29 13:14:22,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-29 13:14:22,049 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:14:22,049 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:14:22,049 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-29 13:14:22,049 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:14:22,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:14:22,050 INFO L82 PathProgramCache]: Analyzing trace with hash -1103713349, now seen corresponding path program 1 times [2020-10-29 13:14:22,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:14:22,050 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1611273250] [2020-10-29 13:14:22,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:14:22,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:14:22,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:22,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:22,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:22,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:23,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:25,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:27,080 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:14:27,080 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-29 13:14:27,081 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-29 13:14:27,081 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-29 13:14:27,081 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:14:27,081 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:14:27,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-29 13:14:27,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:14:27,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-29 13:14:27,081 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:14:27,609 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 33 [2020-10-29 13:14:28,213 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-29 13:14:28,214 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:14:28,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:14:28,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:28,224 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:14:28,225 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:14:28,225 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:14:28,225 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-29 13:14:28,225 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:14:28,225 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:14:28,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:14:28,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:14:28,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:14:28,226 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:14:28,263 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:14:28,263 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1611273250] [2020-10-29 13:14:28,264 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:14:28,264 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2020-10-29 13:14:28,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792546309] [2020-10-29 13:14:28,265 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-29 13:14:28,265 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:14:28,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-29 13:14:28,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2020-10-29 13:14:28,266 INFO L87 Difference]: Start difference. First operand 10944 states and 15831 transitions. Second operand 18 states. [2020-10-29 13:14:28,787 WARN L193 SmtUtils]: Spent 329.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-10-29 13:14:29,358 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 57 [2020-10-29 13:14:29,655 WARN L193 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 68 [2020-10-29 13:14:30,060 WARN L193 SmtUtils]: Spent 351.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 82 [2020-10-29 13:14:30,436 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 48 [2020-10-29 13:14:30,605 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 49 [2020-10-29 13:14:33,896 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-10-29 13:14:34,222 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification that was a NOOP. DAG size: 152 [2020-10-29 13:14:34,651 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2020-10-29 13:14:57,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:14:57,177 INFO L93 Difference]: Finished difference Result 98073 states and 142095 transitions. [2020-10-29 13:14:57,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-29 13:14:57,178 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 82 [2020-10-29 13:14:57,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:14:57,344 INFO L225 Difference]: With dead ends: 98073 [2020-10-29 13:14:57,344 INFO L226 Difference]: Without dead ends: 87208 [2020-10-29 13:14:57,373 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=215, Invalid=1191, Unknown=0, NotChecked=0, Total=1406 [2020-10-29 13:14:57,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87208 states. [2020-10-29 13:15:01,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87208 to 10952. [2020-10-29 13:15:01,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10952 states. [2020-10-29 13:15:01,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10952 states to 10952 states and 15840 transitions. [2020-10-29 13:15:01,643 INFO L78 Accepts]: Start accepts. Automaton has 10952 states and 15840 transitions. Word has length 82 [2020-10-29 13:15:01,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:15:01,643 INFO L481 AbstractCegarLoop]: Abstraction has 10952 states and 15840 transitions. [2020-10-29 13:15:01,644 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-29 13:15:01,644 INFO L276 IsEmpty]: Start isEmpty. Operand 10952 states and 15840 transitions. [2020-10-29 13:15:01,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-29 13:15:01,647 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:15:01,647 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:15:01,648 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-29 13:15:01,648 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:15:01,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:15:01,649 INFO L82 PathProgramCache]: Analyzing trace with hash -142088564, now seen corresponding path program 1 times [2020-10-29 13:15:01,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:15:01,649 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [981388815] [2020-10-29 13:15:01,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:15:01,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:15:01,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:01,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:01,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:01,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:02,683 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:15:02,683 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-29 13:15:02,683 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 13:15:02,683 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1006 [2020-10-29 13:15:02,684 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:15:02,684 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:15:02,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:15:02,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 51 [2020-10-29 13:15:02,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-29 13:15:02,684 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:15:02,928 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-29 13:15:02,929 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:15:02,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:15:02,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:02,938 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:15:02,939 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:15:02,939 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:15:02,939 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 13:15:02,939 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:15:02,939 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:15:02,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:15:02,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:15:02,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:15:02,939 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:15:02,950 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:15:02,951 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [981388815] [2020-10-29 13:15:02,951 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:15:02,951 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 13:15:02,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285616672] [2020-10-29 13:15:02,951 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 13:15:02,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:15:02,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 13:15:02,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 13:15:02,952 INFO L87 Difference]: Start difference. First operand 10952 states and 15840 transitions. Second operand 4 states. [2020-10-29 13:15:03,192 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 144 [2020-10-29 13:15:09,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:15:09,196 INFO L93 Difference]: Finished difference Result 26298 states and 37980 transitions. [2020-10-29 13:15:09,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 13:15:09,196 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 83 [2020-10-29 13:15:09,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:15:09,215 INFO L225 Difference]: With dead ends: 26298 [2020-10-29 13:15:09,216 INFO L226 Difference]: Without dead ends: 18043 [2020-10-29 13:15:09,227 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:15:09,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18043 states. [2020-10-29 13:15:14,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18043 to 17300. [2020-10-29 13:15:14,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17300 states. [2020-10-29 13:15:14,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17300 states to 17300 states and 24876 transitions. [2020-10-29 13:15:14,761 INFO L78 Accepts]: Start accepts. Automaton has 17300 states and 24876 transitions. Word has length 83 [2020-10-29 13:15:14,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:15:14,761 INFO L481 AbstractCegarLoop]: Abstraction has 17300 states and 24876 transitions. [2020-10-29 13:15:14,761 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 13:15:14,761 INFO L276 IsEmpty]: Start isEmpty. Operand 17300 states and 24876 transitions. [2020-10-29 13:15:14,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-29 13:15:14,763 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:15:14,764 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:15:14,764 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-29 13:15:14,764 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:15:14,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:15:14,765 INFO L82 PathProgramCache]: Analyzing trace with hash 829887108, now seen corresponding path program 1 times [2020-10-29 13:15:14,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:15:14,765 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [670975746] [2020-10-29 13:15:14,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:15:14,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:15:14,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:14,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:14,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:14,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:14,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:15,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:15,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:15,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:19,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:19,788 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:15:19,788 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-29 13:15:19,788 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-29 13:15:19,788 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-29 13:15:19,788 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:15:19,788 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:15:19,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:15:19,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 13:15:19,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-10-29 13:15:19,789 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:15:20,031 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-29 13:15:20,032 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:15:20,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:15:20,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:20,050 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:15:20,050 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:15:20,050 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:15:20,050 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-29 13:15:20,051 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:15:20,051 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:15:20,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:15:20,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:15:20,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 13:15:20,051 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:15:20,072 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:15:20,072 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [670975746] [2020-10-29 13:15:20,072 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:15:20,073 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 13:15:20,073 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068052408] [2020-10-29 13:15:20,073 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:15:20,073 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:15:20,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:15:20,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:15:20,074 INFO L87 Difference]: Start difference. First operand 17300 states and 24876 transitions. Second operand 6 states. [2020-10-29 13:15:20,331 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 143 [2020-10-29 13:15:21,190 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 141 [2020-10-29 13:15:27,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:15:27,193 INFO L93 Difference]: Finished difference Result 37715 states and 54237 transitions. [2020-10-29 13:15:27,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-29 13:15:27,194 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 84 [2020-10-29 13:15:27,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:15:27,218 INFO L225 Difference]: With dead ends: 37715 [2020-10-29 13:15:27,218 INFO L226 Difference]: Without dead ends: 20520 [2020-10-29 13:15:27,237 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-10-29 13:15:27,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20520 states. [2020-10-29 13:15:32,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20520 to 17334. [2020-10-29 13:15:32,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17334 states. [2020-10-29 13:15:32,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17334 states to 17334 states and 24911 transitions. [2020-10-29 13:15:32,720 INFO L78 Accepts]: Start accepts. Automaton has 17334 states and 24911 transitions. Word has length 84 [2020-10-29 13:15:32,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:15:32,720 INFO L481 AbstractCegarLoop]: Abstraction has 17334 states and 24911 transitions. [2020-10-29 13:15:32,720 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:15:32,720 INFO L276 IsEmpty]: Start isEmpty. Operand 17334 states and 24911 transitions. [2020-10-29 13:15:32,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-29 13:15:32,722 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:15:32,722 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:15:32,723 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-29 13:15:32,723 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:15:32,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:15:32,723 INFO L82 PathProgramCache]: Analyzing trace with hash 957972415, now seen corresponding path program 1 times [2020-10-29 13:15:32,724 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:15:32,724 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [594383873] [2020-10-29 13:15:32,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:15:32,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:15:32,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:32,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:32,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:33,170 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:15:33,170 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-29 13:15:33,170 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 13:15:33,170 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 420 [2020-10-29 13:15:33,170 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:15:33,170 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:15:33,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:15:33,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 55 [2020-10-29 13:15:33,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-29 13:15:33,171 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:15:33,421 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-29 13:15:33,422 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:15:33,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:15:33,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:33,432 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:15:33,433 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:15:33,433 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:15:33,433 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 13:15:33,433 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:15:33,433 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:15:33,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:15:33,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:15:33,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:15:33,434 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:15:33,447 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:15:33,447 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [594383873] [2020-10-29 13:15:33,447 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:15:33,448 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 13:15:33,448 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449888569] [2020-10-29 13:15:33,448 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 13:15:33,449 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:15:33,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 13:15:33,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 13:15:33,449 INFO L87 Difference]: Start difference. First operand 17334 states and 24911 transitions. Second operand 4 states. [2020-10-29 13:15:33,690 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 144 [2020-10-29 13:15:44,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:15:44,170 INFO L93 Difference]: Finished difference Result 49644 states and 70803 transitions. [2020-10-29 13:15:44,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 13:15:44,170 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 84 [2020-10-29 13:15:44,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:15:44,206 INFO L225 Difference]: With dead ends: 49644 [2020-10-29 13:15:44,206 INFO L226 Difference]: Without dead ends: 32449 [2020-10-29 13:15:44,228 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:15:44,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32449 states. [2020-10-29 13:15:53,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32449 to 30626. [2020-10-29 13:15:53,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30626 states. [2020-10-29 13:15:53,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30626 states to 30626 states and 43175 transitions. [2020-10-29 13:15:53,719 INFO L78 Accepts]: Start accepts. Automaton has 30626 states and 43175 transitions. Word has length 84 [2020-10-29 13:15:53,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:15:53,719 INFO L481 AbstractCegarLoop]: Abstraction has 30626 states and 43175 transitions. [2020-10-29 13:15:53,719 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 13:15:53,719 INFO L276 IsEmpty]: Start isEmpty. Operand 30626 states and 43175 transitions. [2020-10-29 13:15:53,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-29 13:15:53,721 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:15:53,721 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:15:53,721 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-29 13:15:53,722 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:15:53,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:15:53,722 INFO L82 PathProgramCache]: Analyzing trace with hash -954303037, now seen corresponding path program 1 times [2020-10-29 13:15:53,722 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:15:53,723 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1621245977] [2020-10-29 13:15:53,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:15:53,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:15:53,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:53,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:54,053 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:15:54,054 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-10-29 13:15:54,054 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 13:15:54,054 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 305 [2020-10-29 13:15:54,054 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:15:54,054 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:15:54,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:15:54,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 60 [2020-10-29 13:15:54,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-29 13:15:54,055 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:15:54,297 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-29 13:15:54,298 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:15:54,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:15:54,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:54,309 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:15:54,309 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:15:54,309 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:15:54,310 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-29 13:15:54,310 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:15:54,310 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:15:54,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:15:54,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:15:54,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:15:54,310 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:15:54,323 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:15:54,323 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1621245977] [2020-10-29 13:15:54,323 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:15:54,323 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 13:15:54,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377977928] [2020-10-29 13:15:54,324 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 13:15:54,324 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:15:54,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 13:15:54,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 13:15:54,325 INFO L87 Difference]: Start difference. First operand 30626 states and 43175 transitions. Second operand 4 states. [2020-10-29 13:15:54,551 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 144