/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=DEEPEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.3.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 23:41:12,191 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 23:41:12,194 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 23:41:12,234 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 23:41:12,235 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 23:41:12,242 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 23:41:12,244 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 23:41:12,249 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 23:41:12,252 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 23:41:12,260 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 23:41:12,261 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 23:41:12,263 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 23:41:12,264 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 23:41:12,268 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 23:41:12,271 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 23:41:12,274 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 23:41:12,275 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 23:41:12,279 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 23:41:12,287 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 23:41:12,291 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 23:41:12,293 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 23:41:12,295 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 23:41:12,296 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 23:41:12,299 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 23:41:12,304 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 23:41:12,304 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 23:41:12,305 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 23:41:12,306 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 23:41:12,306 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 23:41:12,307 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 23:41:12,308 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 23:41:12,310 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 23:41:12,311 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 23:41:12,312 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 23:41:12,314 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 23:41:12,315 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 23:41:12,315 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 23:41:12,316 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 23:41:12,316 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 23:41:12,317 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 23:41:12,318 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 23:41:12,325 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-27 23:41:12,374 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 23:41:12,375 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 23:41:12,379 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 23:41:12,379 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 23:41:12,380 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 23:41:12,380 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 23:41:12,380 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 23:41:12,380 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 23:41:12,381 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 23:41:12,381 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 23:41:12,382 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 23:41:12,382 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 23:41:12,383 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 23:41:12,383 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 23:41:12,383 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 23:41:12,383 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 23:41:12,383 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 23:41:12,384 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 23:41:12,384 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 23:41:12,384 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 23:41:12,384 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 23:41:12,384 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 23:41:12,385 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 23:41:12,385 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 23:41:12,385 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 23:41:12,385 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 23:41:12,386 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 23:41:12,386 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 23:41:12,386 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 23:41:12,386 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 23:41:12,813 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 23:41:12,857 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 23:41:12,861 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 23:41:12,862 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 23:41:12,863 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 23:41:12,864 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.3.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c [2020-10-27 23:41:12,950 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e643e6a37/c41ef771c32c48bd96236f6837989cc0/FLAG7a2fa5315 [2020-10-27 23:41:13,698 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 23:41:13,699 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.3.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c [2020-10-27 23:41:13,718 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e643e6a37/c41ef771c32c48bd96236f6837989cc0/FLAG7a2fa5315 [2020-10-27 23:41:13,938 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e643e6a37/c41ef771c32c48bd96236f6837989cc0 [2020-10-27 23:41:13,945 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 23:41:13,951 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 23:41:13,953 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 23:41:13,953 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 23:41:13,957 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 23:41:13,958 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 11:41:13" (1/1) ... [2020-10-27 23:41:13,962 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3f096995 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:41:13, skipping insertion in model container [2020-10-27 23:41:13,962 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 11:41:13" (1/1) ... [2020-10-27 23:41:13,970 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 23:41:14,027 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 23:41:14,417 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 23:41:14,444 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 23:41:14,568 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 23:41:14,591 INFO L208 MainTranslator]: Completed translation [2020-10-27 23:41:14,592 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:41:14 WrapperNode [2020-10-27 23:41:14,592 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 23:41:14,593 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 23:41:14,594 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 23:41:14,594 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 23:41:14,609 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:41:14" (1/1) ... [2020-10-27 23:41:14,611 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:41:14" (1/1) ... [2020-10-27 23:41:14,648 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:41:14" (1/1) ... [2020-10-27 23:41:14,649 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:41:14" (1/1) ... [2020-10-27 23:41:14,717 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:41:14" (1/1) ... [2020-10-27 23:41:14,740 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:41:14" (1/1) ... [2020-10-27 23:41:14,749 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:41:14" (1/1) ... [2020-10-27 23:41:14,765 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 23:41:14,767 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 23:41:14,767 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 23:41:14,767 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 23:41:14,768 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:41:14" (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 [2020-10-27 23:41:14,841 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 23:41:14,841 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 23:41:14,842 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 23:41:14,842 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-27 23:41:14,842 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 23:41:14,842 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 23:41:14,842 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 23:41:14,843 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 23:41:14,843 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 23:41:14,843 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-27 23:41:14,843 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-27 23:41:14,843 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-27 23:41:14,844 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-27 23:41:14,844 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-27 23:41:14,844 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-27 23:41:14,844 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-27 23:41:14,844 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-27 23:41:14,844 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-27 23:41:14,845 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-27 23:41:14,845 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-27 23:41:14,845 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 23:41:14,845 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 23:41:14,845 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 23:41:14,845 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 23:41:14,846 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 23:41:14,846 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 23:41:14,846 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 23:41:15,941 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 23:41:15,942 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-27 23:41:15,944 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 11:41:15 BoogieIcfgContainer [2020-10-27 23:41:15,944 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 23:41:15,946 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 23:41:15,946 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 23:41:15,950 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 23:41:15,950 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 11:41:13" (1/3) ... [2020-10-27 23:41:15,951 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3504fca6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 11:41:15, skipping insertion in model container [2020-10-27 23:41:15,951 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:41:14" (2/3) ... [2020-10-27 23:41:15,952 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3504fca6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 11:41:15, skipping insertion in model container [2020-10-27 23:41:15,952 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 11:41:15" (3/3) ... [2020-10-27 23:41:15,954 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.3.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c [2020-10-27 23:41:15,968 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 23:41:15,975 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 23:41:15,989 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 23:41:16,018 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 23:41:16,019 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 23:41:16,019 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 23:41:16,019 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 23:41:16,019 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 23:41:16,019 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 23:41:16,019 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 23:41:16,020 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 23:41:16,042 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states. [2020-10-27 23:41:16,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-27 23:41:16,054 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:41:16,055 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:41:16,056 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:41:16,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:41:16,063 INFO L82 PathProgramCache]: Analyzing trace with hash 288360738, now seen corresponding path program 1 times [2020-10-27 23:41:16,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:41:16,074 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1006733216] [2020-10-27 23:41:16,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:41:16,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:41:16,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:16,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:17,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:17,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:17,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:18,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:18,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:20,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:20,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:20,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:21,425 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:41:21,425 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-27 23:41:21,425 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-27 23:41:21,426 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5035 [2020-10-27 23:41:21,428 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:41:21,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 23:41:21,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-27 23:41:21,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-27 23:41:21,430 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-27 23:41:22,021 WARN L193 SmtUtils]: Spent 281.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2020-10-27 23:41:22,023 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:41:22,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:41:22,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:22,050 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:41:22,051 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:41:22,051 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:41:22,051 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-27 23:41:22,052 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:41:22,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:41:22,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:41:22,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:41:22,052 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:41:22,097 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:41:22,098 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1006733216] [2020-10-27 23:41:22,100 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:41:22,101 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-27 23:41:22,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745343010] [2020-10-27 23:41:22,110 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 23:41:22,110 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:41:22,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 23:41:22,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-10-27 23:41:22,134 INFO L87 Difference]: Start difference. First operand 216 states. Second operand 9 states. [2020-10-27 23:41:22,496 WARN L193 SmtUtils]: Spent 272.00 ms on a formula simplification that was a NOOP. DAG size: 182 [2020-10-27 23:41:24,027 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification that was a NOOP. DAG size: 180 [2020-10-27 23:41:24,801 WARN L193 SmtUtils]: Spent 256.00 ms on a formula simplification that was a NOOP. DAG size: 179 [2020-10-27 23:41:24,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:41:24,890 INFO L93 Difference]: Finished difference Result 548 states and 892 transitions. [2020-10-27 23:41:24,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-27 23:41:24,891 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 52 [2020-10-27 23:41:24,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:41:24,906 INFO L225 Difference]: With dead ends: 548 [2020-10-27 23:41:24,907 INFO L226 Difference]: Without dead ends: 425 [2020-10-27 23:41:24,911 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2020-10-27 23:41:24,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 425 states. [2020-10-27 23:41:24,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 425 to 210. [2020-10-27 23:41:24,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 210 states. [2020-10-27 23:41:24,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 262 transitions. [2020-10-27 23:41:24,985 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 262 transitions. Word has length 52 [2020-10-27 23:41:24,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:41:24,985 INFO L481 AbstractCegarLoop]: Abstraction has 210 states and 262 transitions. [2020-10-27 23:41:24,985 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 23:41:24,986 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 262 transitions. [2020-10-27 23:41:24,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-27 23:41:24,991 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:41:24,992 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:41:24,992 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 23:41:24,992 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:41:24,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:41:24,993 INFO L82 PathProgramCache]: Analyzing trace with hash 379916895, now seen corresponding path program 1 times [2020-10-27 23:41:24,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:41:24,995 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [615021173] [2020-10-27 23:41:24,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:41:25,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:41:25,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:25,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:25,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:25,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:25,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:26,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:26,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:26,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:26,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:26,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:27,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:27,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:30,046 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:41:30,046 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-27 23:41:30,046 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-27 23:41:30,046 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-27 23:41:30,047 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:41:30,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 23:41:30,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-27 23:41:30,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-27 23:41:30,047 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:41:30,408 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2020-10-27 23:41:30,410 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:41:30,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:41:30,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:30,433 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:41:30,433 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:41:30,434 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:41:30,434 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-27 23:41:30,434 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:41:30,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:41:30,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:41:30,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:41:30,435 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:41:30,456 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:41:30,458 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [615021173] [2020-10-27 23:41:30,458 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:41:30,458 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-27 23:41:30,459 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78505952] [2020-10-27 23:41:30,461 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 23:41:30,461 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:41:30,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 23:41:30,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-27 23:41:30,473 INFO L87 Difference]: Start difference. First operand 210 states and 262 transitions. Second operand 9 states. [2020-10-27 23:41:30,816 WARN L193 SmtUtils]: Spent 263.00 ms on a formula simplification that was a NOOP. DAG size: 201 [2020-10-27 23:41:32,053 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-27 23:41:33,656 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 180 [2020-10-27 23:41:33,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:41:33,718 INFO L93 Difference]: Finished difference Result 481 states and 660 transitions. [2020-10-27 23:41:33,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-27 23:41:33,718 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 52 [2020-10-27 23:41:33,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:41:33,723 INFO L225 Difference]: With dead ends: 481 [2020-10-27 23:41:33,726 INFO L226 Difference]: Without dead ends: 422 [2020-10-27 23:41:33,729 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=100, Invalid=406, Unknown=0, NotChecked=0, Total=506 [2020-10-27 23:41:33,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2020-10-27 23:41:33,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 236. [2020-10-27 23:41:33,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 236 states. [2020-10-27 23:41:33,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 300 transitions. [2020-10-27 23:41:33,784 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 300 transitions. Word has length 52 [2020-10-27 23:41:33,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:41:33,785 INFO L481 AbstractCegarLoop]: Abstraction has 236 states and 300 transitions. [2020-10-27 23:41:33,785 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 23:41:33,785 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 300 transitions. [2020-10-27 23:41:33,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-27 23:41:33,788 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:41:33,788 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:41:33,788 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 23:41:33,788 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:41:33,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:41:33,789 INFO L82 PathProgramCache]: Analyzing trace with hash 480463550, now seen corresponding path program 1 times [2020-10-27 23:41:33,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:41:33,789 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1867028138] [2020-10-27 23:41:33,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:41:33,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:41:33,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:33,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:34,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:34,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:34,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:34,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:34,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:35,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:35,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:35,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:35,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:35,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:36,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:38,852 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:41:38,853 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-27 23:41:38,853 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-27 23:41:38,853 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-27 23:41:38,853 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:41:38,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 23:41:38,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-27 23:41:38,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-27 23:41:38,854 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:41:39,167 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2020-10-27 23:41:39,168 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:41:39,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:41:39,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:39,185 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:41:39,186 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:41:39,186 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:41:39,186 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 23:41:39,186 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:41:39,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:41:39,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:41:39,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:41:39,187 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:41:39,202 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:41:39,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1867028138] [2020-10-27 23:41:39,202 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:41:39,202 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 23:41:39,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668301378] [2020-10-27 23:41:39,203 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 23:41:39,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:41:39,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 23:41:39,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 23:41:39,205 INFO L87 Difference]: Start difference. First operand 236 states and 300 transitions. Second operand 6 states. [2020-10-27 23:41:39,474 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 179 [2020-10-27 23:41:40,642 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 180 [2020-10-27 23:41:40,971 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification that was a NOOP. DAG size: 179 [2020-10-27 23:41:41,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:41:41,891 INFO L93 Difference]: Finished difference Result 890 states and 1251 transitions. [2020-10-27 23:41:41,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 23:41:41,892 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 52 [2020-10-27 23:41:41,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:41:41,898 INFO L225 Difference]: With dead ends: 890 [2020-10-27 23:41:41,898 INFO L226 Difference]: Without dead ends: 800 [2020-10-27 23:41:41,900 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-27 23:41:41,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 800 states. [2020-10-27 23:41:41,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 800 to 453. [2020-10-27 23:41:41,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 453 states. [2020-10-27 23:41:41,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 453 states to 453 states and 627 transitions. [2020-10-27 23:41:41,950 INFO L78 Accepts]: Start accepts. Automaton has 453 states and 627 transitions. Word has length 52 [2020-10-27 23:41:41,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:41:41,951 INFO L481 AbstractCegarLoop]: Abstraction has 453 states and 627 transitions. [2020-10-27 23:41:41,951 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 23:41:41,951 INFO L276 IsEmpty]: Start isEmpty. Operand 453 states and 627 transitions. [2020-10-27 23:41:41,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-27 23:41:41,953 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:41:41,954 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:41:41,954 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 23:41:41,954 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:41:41,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:41:41,955 INFO L82 PathProgramCache]: Analyzing trace with hash 318058271, now seen corresponding path program 1 times [2020-10-27 23:41:41,955 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:41:41,955 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [639637524] [2020-10-27 23:41:41,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:41:41,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:41:42,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:42,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:42,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:42,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:42,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:42,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:42,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:42,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:43,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:44,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:44,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:45,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:45,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:46,994 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:41:46,994 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-27 23:41:46,994 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-27 23:41:46,994 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-27 23:41:46,994 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:41:46,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 23:41:46,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-27 23:41:46,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-27 23:41:46,995 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:41:47,477 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2020-10-27 23:41:47,478 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:41:47,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:41:47,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:47,496 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:41:47,497 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:41:47,497 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:41:47,497 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-27 23:41:47,497 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:41:47,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:41:47,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:41:47,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:41:47,498 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:41:47,519 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:41:47,520 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [639637524] [2020-10-27 23:41:47,520 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:41:47,520 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-10-27 23:41:47,521 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810861305] [2020-10-27 23:41:47,521 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 23:41:47,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:41:47,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 23:41:47,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2020-10-27 23:41:47,522 INFO L87 Difference]: Start difference. First operand 453 states and 627 transitions. Second operand 12 states. [2020-10-27 23:41:48,294 WARN L193 SmtUtils]: Spent 610.00 ms on a formula simplification. DAG size of input: 211 DAG size of output: 210 [2020-10-27 23:41:50,007 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 183 [2020-10-27 23:41:50,327 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 50 [2020-10-27 23:41:53,550 WARN L193 SmtUtils]: Spent 540.00 ms on a formula simplification. DAG size of input: 195 DAG size of output: 191 [2020-10-27 23:41:53,887 WARN L193 SmtUtils]: Spent 236.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2020-10-27 23:41:54,167 WARN L193 SmtUtils]: Spent 242.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-10-27 23:41:54,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:41:54,730 INFO L93 Difference]: Finished difference Result 3351 states and 4947 transitions. [2020-10-27 23:41:54,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-10-27 23:41:54,730 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 53 [2020-10-27 23:41:54,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:41:54,749 INFO L225 Difference]: With dead ends: 3351 [2020-10-27 23:41:54,749 INFO L226 Difference]: Without dead ends: 3126 [2020-10-27 23:41:54,753 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 802 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=550, Invalid=2420, Unknown=0, NotChecked=0, Total=2970 [2020-10-27 23:41:54,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3126 states. [2020-10-27 23:41:54,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3126 to 787. [2020-10-27 23:41:54,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 787 states. [2020-10-27 23:41:54,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 787 states to 787 states and 1116 transitions. [2020-10-27 23:41:54,879 INFO L78 Accepts]: Start accepts. Automaton has 787 states and 1116 transitions. Word has length 53 [2020-10-27 23:41:54,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:41:54,880 INFO L481 AbstractCegarLoop]: Abstraction has 787 states and 1116 transitions. [2020-10-27 23:41:54,880 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 23:41:54,880 INFO L276 IsEmpty]: Start isEmpty. Operand 787 states and 1116 transitions. [2020-10-27 23:41:54,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-27 23:41:54,882 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:41:54,882 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:41:54,883 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 23:41:54,883 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:41:54,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:41:54,884 INFO L82 PathProgramCache]: Analyzing trace with hash 467101882, now seen corresponding path program 1 times [2020-10-27 23:41:54,884 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:41:54,884 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2095052958] [2020-10-27 23:41:54,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:41:54,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:41:54,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:54,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:55,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:55,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:55,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:55,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:55,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:56,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:56,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:56,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:56,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:57,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:57,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:57,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:57,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:58,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:59,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:59,914 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:41:59,914 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-27 23:41:59,914 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 17 [2020-10-27 23:41:59,914 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-27 23:41:59,915 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:41:59,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 23:41:59,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-27 23:41:59,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-27 23:41:59,917 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 23:42:00,283 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2020-10-27 23:42:00,284 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:42:00,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:42:00,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:00,301 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:42:00,302 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:42:00,302 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:42:00,302 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-27 23:42:00,303 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:42:00,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:42:00,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:42:00,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:42:00,303 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:42:00,320 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:42:00,320 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2095052958] [2020-10-27 23:42:00,321 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:42:00,321 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-27 23:42:00,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236876265] [2020-10-27 23:42:00,323 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 23:42:00,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:42:00,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 23:42:00,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-10-27 23:42:00,324 INFO L87 Difference]: Start difference. First operand 787 states and 1116 transitions. Second operand 9 states. [2020-10-27 23:42:00,608 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification that was a NOOP. DAG size: 182 [2020-10-27 23:42:01,669 WARN L193 SmtUtils]: Spent 238.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-10-27 23:42:02,301 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification that was a NOOP. DAG size: 180 [2020-10-27 23:42:02,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:42:02,419 INFO L93 Difference]: Finished difference Result 1878 states and 2778 transitions. [2020-10-27 23:42:02,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 23:42:02,420 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 53 [2020-10-27 23:42:02,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:42:02,428 INFO L225 Difference]: With dead ends: 1878 [2020-10-27 23:42:02,429 INFO L226 Difference]: Without dead ends: 1429 [2020-10-27 23:42:02,431 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=94, Invalid=248, Unknown=0, NotChecked=0, Total=342 [2020-10-27 23:42:02,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1429 states. [2020-10-27 23:42:02,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1429 to 501. [2020-10-27 23:42:02,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 501 states. [2020-10-27 23:42:02,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 501 states to 501 states and 678 transitions. [2020-10-27 23:42:02,504 INFO L78 Accepts]: Start accepts. Automaton has 501 states and 678 transitions. Word has length 53 [2020-10-27 23:42:02,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:42:02,504 INFO L481 AbstractCegarLoop]: Abstraction has 501 states and 678 transitions. [2020-10-27 23:42:02,504 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 23:42:02,504 INFO L276 IsEmpty]: Start isEmpty. Operand 501 states and 678 transitions. [2020-10-27 23:42:02,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-27 23:42:02,506 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:42:02,506 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:42:02,506 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 23:42:02,506 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:42:02,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:42:02,507 INFO L82 PathProgramCache]: Analyzing trace with hash 659204694, now seen corresponding path program 1 times [2020-10-27 23:42:02,507 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:42:02,507 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [824506531] [2020-10-27 23:42:02,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:42:02,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:42:02,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:02,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:02,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:02,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:02,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:03,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:03,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:04,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:04,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:04,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:04,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:04,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:04,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:05,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:07,540 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:42:07,541 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-27 23:42:07,541 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-27 23:42:07,541 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-27 23:42:07,541 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:42:07,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 23:42:07,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-27 23:42:07,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-27 23:42:07,542 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:42:07,810 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2020-10-27 23:42:07,810 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:42:07,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:42:07,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:07,834 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:42:07,834 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:42:07,834 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:42:07,835 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-27 23:42:07,835 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:42:07,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:42:07,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:42:07,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:42:07,835 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:42:07,850 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:42:07,851 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [824506531] [2020-10-27 23:42:07,853 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:42:07,853 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-27 23:42:07,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057558874] [2020-10-27 23:42:07,854 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 23:42:07,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:42:07,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 23:42:07,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-27 23:42:07,856 INFO L87 Difference]: Start difference. First operand 501 states and 678 transitions. Second operand 7 states. [2020-10-27 23:42:08,124 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 182 [2020-10-27 23:42:09,205 WARN L193 SmtUtils]: Spent 238.00 ms on a formula simplification that was a NOOP. DAG size: 182 [2020-10-27 23:42:09,511 WARN L193 SmtUtils]: Spent 261.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-27 23:42:09,826 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification that was a NOOP. DAG size: 179 [2020-10-27 23:42:10,073 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification that was a NOOP. DAG size: 180 [2020-10-27 23:42:10,859 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-10-27 23:42:11,134 WARN L193 SmtUtils]: Spent 247.00 ms on a formula simplification that was a NOOP. DAG size: 182 [2020-10-27 23:42:11,566 WARN L193 SmtUtils]: Spent 258.00 ms on a formula simplification that was a NOOP. DAG size: 183 [2020-10-27 23:42:11,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:42:11,611 INFO L93 Difference]: Finished difference Result 2571 states and 3671 transitions. [2020-10-27 23:42:11,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 23:42:11,612 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 53 [2020-10-27 23:42:11,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:42:11,623 INFO L225 Difference]: With dead ends: 2571 [2020-10-27 23:42:11,624 INFO L226 Difference]: Without dead ends: 2190 [2020-10-27 23:42:11,626 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=124, Invalid=296, Unknown=0, NotChecked=0, Total=420 [2020-10-27 23:42:11,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2190 states. [2020-10-27 23:42:11,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2190 to 1023. [2020-10-27 23:42:11,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1023 states. [2020-10-27 23:42:11,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1023 states to 1023 states and 1436 transitions. [2020-10-27 23:42:11,795 INFO L78 Accepts]: Start accepts. Automaton has 1023 states and 1436 transitions. Word has length 53 [2020-10-27 23:42:11,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:42:11,795 INFO L481 AbstractCegarLoop]: Abstraction has 1023 states and 1436 transitions. [2020-10-27 23:42:11,795 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 23:42:11,795 INFO L276 IsEmpty]: Start isEmpty. Operand 1023 states and 1436 transitions. [2020-10-27 23:42:11,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-27 23:42:11,797 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:42:11,797 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] [2020-10-27 23:42:11,798 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 23:42:11,798 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:42:11,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:42:11,798 INFO L82 PathProgramCache]: Analyzing trace with hash -494861649, now seen corresponding path program 1 times [2020-10-27 23:42:11,799 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:42:11,799 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1097165144] [2020-10-27 23:42:11,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:42:11,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:42:11,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:11,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:11,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:12,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:12,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:12,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:12,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:13,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:13,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:16,830 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:42:16,830 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-27 23:42:16,830 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-27 23:42:16,831 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-27 23:42:16,831 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:42:16,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 23:42:16,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-27 23:42:16,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-27 23:42:16,831 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:42:17,093 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2020-10-27 23:42:17,096 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:42:17,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:42:17,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:17,117 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:42:17,117 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:42:17,117 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:42:17,118 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-27 23:42:17,118 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:42:17,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:42:17,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:42:17,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:42:17,118 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:42:17,143 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:42:17,144 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1097165144] [2020-10-27 23:42:17,144 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:42:17,144 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 23:42:17,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872933117] [2020-10-27 23:42:17,145 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 23:42:17,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:42:17,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 23:42:17,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 23:42:17,147 INFO L87 Difference]: Start difference. First operand 1023 states and 1436 transitions. Second operand 6 states. [2020-10-27 23:42:17,441 WARN L193 SmtUtils]: Spent 241.00 ms on a formula simplification that was a NOOP. DAG size: 179 [2020-10-27 23:42:18,572 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 180 [2020-10-27 23:42:18,944 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 179 [2020-10-27 23:42:20,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:42:20,450 INFO L93 Difference]: Finished difference Result 4140 states and 5997 transitions. [2020-10-27 23:42:20,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 23:42:20,450 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 54 [2020-10-27 23:42:20,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:42:20,469 INFO L225 Difference]: With dead ends: 4140 [2020-10-27 23:42:20,469 INFO L226 Difference]: Without dead ends: 3722 [2020-10-27 23:42:20,472 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-27 23:42:20,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3722 states. [2020-10-27 23:42:20,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3722 to 1735. [2020-10-27 23:42:20,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1735 states. [2020-10-27 23:42:20,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1735 states to 1735 states and 2468 transitions. [2020-10-27 23:42:20,797 INFO L78 Accepts]: Start accepts. Automaton has 1735 states and 2468 transitions. Word has length 54 [2020-10-27 23:42:20,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:42:20,798 INFO L481 AbstractCegarLoop]: Abstraction has 1735 states and 2468 transitions. [2020-10-27 23:42:20,798 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 23:42:20,798 INFO L276 IsEmpty]: Start isEmpty. Operand 1735 states and 2468 transitions. [2020-10-27 23:42:20,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-27 23:42:20,800 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:42:20,800 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] [2020-10-27 23:42:20,800 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 23:42:20,800 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:42:20,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:42:20,801 INFO L82 PathProgramCache]: Analyzing trace with hash 270516704, now seen corresponding path program 1 times [2020-10-27 23:42:20,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:42:20,802 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1941920386] [2020-10-27 23:42:20,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:42:20,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:42:20,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:20,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:21,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:21,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:21,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:21,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:22,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:22,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:22,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:23,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:23,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:23,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:24,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:24,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:24,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:24,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:25,828 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:42:25,828 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-27 23:42:25,828 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-27 23:42:25,828 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-27 23:42:25,829 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:42:25,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 23:42:25,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-27 23:42:25,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-27 23:42:25,829 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:42:26,100 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2020-10-27 23:42:26,101 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:42:26,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:42:26,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:26,117 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:42:26,117 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:42:26,118 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:42:26,118 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-27 23:42:26,118 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:42:26,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:42:26,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:42:26,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:42:26,119 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:42:26,133 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:42:26,134 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1941920386] [2020-10-27 23:42:26,134 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:42:26,134 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 23:42:26,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104949914] [2020-10-27 23:42:26,135 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 23:42:26,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:42:26,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 23:42:26,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 23:42:26,136 INFO L87 Difference]: Start difference. First operand 1735 states and 2468 transitions. Second operand 6 states. [2020-10-27 23:42:26,386 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 179 [2020-10-27 23:42:27,411 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 180 [2020-10-27 23:42:27,742 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 179 [2020-10-27 23:42:28,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:42:28,365 INFO L93 Difference]: Finished difference Result 2024 states and 2851 transitions. [2020-10-27 23:42:28,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 23:42:28,365 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 54 [2020-10-27 23:42:28,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:42:28,375 INFO L225 Difference]: With dead ends: 2024 [2020-10-27 23:42:28,376 INFO L226 Difference]: Without dead ends: 2019 [2020-10-27 23:42:28,377 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-27 23:42:28,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2019 states. [2020-10-27 23:42:28,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2019 to 1739. [2020-10-27 23:42:28,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1739 states. [2020-10-27 23:42:28,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1739 states to 1739 states and 2474 transitions. [2020-10-27 23:42:28,662 INFO L78 Accepts]: Start accepts. Automaton has 1739 states and 2474 transitions. Word has length 54 [2020-10-27 23:42:28,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:42:28,663 INFO L481 AbstractCegarLoop]: Abstraction has 1739 states and 2474 transitions. [2020-10-27 23:42:28,663 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 23:42:28,663 INFO L276 IsEmpty]: Start isEmpty. Operand 1739 states and 2474 transitions. [2020-10-27 23:42:28,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-27 23:42:28,664 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:42:28,665 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] [2020-10-27 23:42:28,665 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 23:42:28,665 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:42:28,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:42:28,666 INFO L82 PathProgramCache]: Analyzing trace with hash 462619516, now seen corresponding path program 1 times [2020-10-27 23:42:28,666 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:42:28,666 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1758030843] [2020-10-27 23:42:28,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:42:28,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:42:28,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:28,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:28,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:28,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:28,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:28,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:29,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:29,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:29,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:29,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:29,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:29,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:29,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:29,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:30,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:30,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:30,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:30,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:31,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:31,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:31,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:31,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:31,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:31,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:32,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:32,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:32,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:32,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:33,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:33,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:33,690 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:42:33,691 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-27 23:42:33,691 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 30 [2020-10-27 23:42:33,691 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-27 23:42:33,691 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:42:33,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 23:42:33,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-27 23:42:33,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-27 23:42:33,692 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:42:34,008 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2020-10-27 23:42:34,011 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:42:34,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:42:34,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:34,026 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:42:34,026 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:42:34,026 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:42:34,026 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-27 23:42:34,027 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:42:34,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:42:34,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:42:34,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:42:34,027 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:42:34,042 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:42:34,042 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1758030843] [2020-10-27 23:42:34,042 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:42:34,043 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-27 23:42:34,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297594585] [2020-10-27 23:42:34,043 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 23:42:34,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:42:34,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 23:42:34,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-10-27 23:42:34,044 INFO L87 Difference]: Start difference. First operand 1739 states and 2474 transitions. Second operand 9 states. [2020-10-27 23:42:34,359 WARN L193 SmtUtils]: Spent 267.00 ms on a formula simplification that was a NOOP. DAG size: 180 [2020-10-27 23:42:35,602 WARN L193 SmtUtils]: Spent 240.00 ms on a formula simplification that was a NOOP. DAG size: 183 [2020-10-27 23:42:36,734 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 179 [2020-10-27 23:42:37,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:42:37,282 INFO L93 Difference]: Finished difference Result 5974 states and 8655 transitions. [2020-10-27 23:42:37,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-27 23:42:37,283 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 54 [2020-10-27 23:42:37,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:42:37,307 INFO L225 Difference]: With dead ends: 5974 [2020-10-27 23:42:37,308 INFO L226 Difference]: Without dead ends: 5030 [2020-10-27 23:42:37,312 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=99, Invalid=363, Unknown=0, NotChecked=0, Total=462 [2020-10-27 23:42:37,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5030 states. [2020-10-27 23:42:37,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5030 to 1579. [2020-10-27 23:42:37,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1579 states. [2020-10-27 23:42:37,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1579 states to 1579 states and 2249 transitions. [2020-10-27 23:42:37,637 INFO L78 Accepts]: Start accepts. Automaton has 1579 states and 2249 transitions. Word has length 54 [2020-10-27 23:42:37,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:42:37,638 INFO L481 AbstractCegarLoop]: Abstraction has 1579 states and 2249 transitions. [2020-10-27 23:42:37,638 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 23:42:37,638 INFO L276 IsEmpty]: Start isEmpty. Operand 1579 states and 2249 transitions. [2020-10-27 23:42:37,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-27 23:42:37,640 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:42:37,640 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] [2020-10-27 23:42:37,640 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 23:42:37,640 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:42:37,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:42:37,641 INFO L82 PathProgramCache]: Analyzing trace with hash 973493975, now seen corresponding path program 1 times [2020-10-27 23:42:37,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:42:37,641 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1702069756] [2020-10-27 23:42:37,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:42:37,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:42:37,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:37,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:37,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:37,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:37,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:38,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:38,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:38,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:38,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:38,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:38,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:39,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:39,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:39,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:40,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:40,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:40,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:40,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:40,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:41,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:41,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:41,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:41,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:42,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:42,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:42,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:42,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:42,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:42,669 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:42:42,669 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-27 23:42:42,670 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 28 [2020-10-27 23:42:42,670 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-27 23:42:42,670 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:42:42,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 23:42:42,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-27 23:42:42,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-27 23:42:42,670 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:42:43,003 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2020-10-27 23:42:43,004 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:42:43,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:42:43,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:43,016 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:42:43,016 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:42:43,017 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:42:43,017 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 23:42:43,017 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:42:43,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:42:43,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:42:43,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:42:43,017 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:42:43,026 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:42:43,027 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1702069756] [2020-10-27 23:42:43,027 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:42:43,027 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-27 23:42:43,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010255117] [2020-10-27 23:42:43,027 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 23:42:43,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:42:43,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 23:42:43,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-10-27 23:42:43,028 INFO L87 Difference]: Start difference. First operand 1579 states and 2249 transitions. Second operand 10 states. [2020-10-27 23:42:43,335 WARN L193 SmtUtils]: Spent 238.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-10-27 23:42:44,375 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 180 [2020-10-27 23:42:45,282 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 179 [2020-10-27 23:42:45,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:42:45,672 INFO L93 Difference]: Finished difference Result 4231 states and 6115 transitions. [2020-10-27 23:42:45,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-27 23:42:45,673 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 54 [2020-10-27 23:42:45,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:42:45,689 INFO L225 Difference]: With dead ends: 4231 [2020-10-27 23:42:45,689 INFO L226 Difference]: Without dead ends: 3902 [2020-10-27 23:42:45,692 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2020-10-27 23:42:45,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3902 states. [2020-10-27 23:42:45,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3902 to 1584. [2020-10-27 23:42:45,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1584 states. [2020-10-27 23:42:45,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1584 states to 1584 states and 2255 transitions. [2020-10-27 23:42:45,992 INFO L78 Accepts]: Start accepts. Automaton has 1584 states and 2255 transitions. Word has length 54 [2020-10-27 23:42:45,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:42:45,992 INFO L481 AbstractCegarLoop]: Abstraction has 1584 states and 2255 transitions. [2020-10-27 23:42:45,992 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 23:42:45,992 INFO L276 IsEmpty]: Start isEmpty. Operand 1584 states and 2255 transitions. [2020-10-27 23:42:45,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-27 23:42:45,994 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:42:45,994 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] [2020-10-27 23:42:45,995 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 23:42:45,995 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:42:45,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:42:45,995 INFO L82 PathProgramCache]: Analyzing trace with hash 1074040630, now seen corresponding path program 1 times [2020-10-27 23:42:45,995 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:42:45,996 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2054902670] [2020-10-27 23:42:45,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:42:46,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:42:46,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:46,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:46,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:46,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:46,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:46,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:46,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:46,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:47,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:47,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:47,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:47,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:48,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:48,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:48,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:48,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:49,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:49,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:50,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:51,024 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:42:51,025 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-27 23:42:51,025 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 19 [2020-10-27 23:42:51,025 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-27 23:42:51,025 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:42:51,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 23:42:51,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-27 23:42:51,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-27 23:42:51,025 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:42:51,279 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2020-10-27 23:42:51,280 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:42:51,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:42:51,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:51,298 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:42:51,298 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:42:51,298 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:42:51,298 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-27 23:42:51,298 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:42:51,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:42:51,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:42:51,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:42:51,299 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:42:51,311 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:42:51,311 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2054902670] [2020-10-27 23:42:51,311 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:42:51,312 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 23:42:51,312 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909916978] [2020-10-27 23:42:51,312 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 23:42:51,312 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:42:51,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 23:42:51,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 23:42:51,313 INFO L87 Difference]: Start difference. First operand 1584 states and 2255 transitions. Second operand 6 states. [2020-10-27 23:42:51,551 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 179 [2020-10-27 23:42:52,665 WARN L193 SmtUtils]: Spent 239.00 ms on a formula simplification that was a NOOP. DAG size: 180 [2020-10-27 23:42:53,010 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 179 [2020-10-27 23:42:55,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:42:55,010 INFO L93 Difference]: Finished difference Result 8799 states and 13137 transitions. [2020-10-27 23:42:55,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 23:42:55,011 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 54 [2020-10-27 23:42:55,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:42:55,043 INFO L225 Difference]: With dead ends: 8799 [2020-10-27 23:42:55,043 INFO L226 Difference]: Without dead ends: 7864 [2020-10-27 23:42:55,049 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-27 23:42:55,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7864 states. [2020-10-27 23:42:55,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7864 to 4294. [2020-10-27 23:42:55,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4294 states. [2020-10-27 23:42:55,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4294 states to 4294 states and 6282 transitions. [2020-10-27 23:42:55,816 INFO L78 Accepts]: Start accepts. Automaton has 4294 states and 6282 transitions. Word has length 54 [2020-10-27 23:42:55,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:42:55,816 INFO L481 AbstractCegarLoop]: Abstraction has 4294 states and 6282 transitions. [2020-10-27 23:42:55,816 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 23:42:55,816 INFO L276 IsEmpty]: Start isEmpty. Operand 4294 states and 6282 transitions. [2020-10-27 23:42:55,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-27 23:42:55,818 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:42:55,818 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:42:55,819 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 23:42:55,819 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:42:55,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:42:55,819 INFO L82 PathProgramCache]: Analyzing trace with hash 669490229, now seen corresponding path program 1 times [2020-10-27 23:42:55,820 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:42:55,820 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [915189940] [2020-10-27 23:42:55,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:42:55,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:42:55,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:55,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:55,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:55,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:56,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:56,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:56,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:56,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:56,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:56,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:58,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:58,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:59,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:00,841 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:43:00,841 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-27 23:43:00,841 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-27 23:43:00,842 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-27 23:43:00,842 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:43:00,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 23:43:00,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-27 23:43:00,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-27 23:43:00,842 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:43:01,108 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2020-10-27 23:43:01,111 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:43:01,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:43:01,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:01,127 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:43:01,127 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:43:01,127 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:43:01,128 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-27 23:43:01,128 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:43:01,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:43:01,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:43:01,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:43:01,128 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:43:01,141 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:43:01,142 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [915189940] [2020-10-27 23:43:01,142 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:43:01,142 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-27 23:43:01,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394216249] [2020-10-27 23:43:01,143 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 23:43:01,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:43:01,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 23:43:01,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-27 23:43:01,144 INFO L87 Difference]: Start difference. First operand 4294 states and 6282 transitions. Second operand 7 states. [2020-10-27 23:43:01,425 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification that was a NOOP. DAG size: 182 [2020-10-27 23:43:02,386 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-27 23:43:02,683 WARN L193 SmtUtils]: Spent 239.00 ms on a formula simplification that was a NOOP. DAG size: 182 [2020-10-27 23:43:02,922 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 180 [2020-10-27 23:43:03,181 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 179 [2020-10-27 23:43:04,337 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification that was a NOOP. DAG size: 182 [2020-10-27 23:43:04,628 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-10-27 23:43:05,318 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification that was a NOOP. DAG size: 183 [2020-10-27 23:43:05,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:43:05,430 INFO L93 Difference]: Finished difference Result 8943 states and 13335 transitions. [2020-10-27 23:43:05,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 23:43:05,430 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 55 [2020-10-27 23:43:05,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:43:05,445 INFO L225 Difference]: With dead ends: 8943 [2020-10-27 23:43:05,446 INFO L226 Difference]: Without dead ends: 6223 [2020-10-27 23:43:05,453 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=124, Invalid=296, Unknown=0, NotChecked=0, Total=420 [2020-10-27 23:43:05,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6223 states. [2020-10-27 23:43:05,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6223 to 3324. [2020-10-27 23:43:05,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3324 states. [2020-10-27 23:43:06,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3324 states to 3324 states and 4837 transitions. [2020-10-27 23:43:06,001 INFO L78 Accepts]: Start accepts. Automaton has 3324 states and 4837 transitions. Word has length 55 [2020-10-27 23:43:06,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:43:06,001 INFO L481 AbstractCegarLoop]: Abstraction has 3324 states and 4837 transitions. [2020-10-27 23:43:06,001 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 23:43:06,001 INFO L276 IsEmpty]: Start isEmpty. Operand 3324 states and 4837 transitions. [2020-10-27 23:43:06,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-27 23:43:06,004 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:43:06,004 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:43:06,004 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 23:43:06,004 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:43:06,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:43:06,005 INFO L82 PathProgramCache]: Analyzing trace with hash -2058718655, now seen corresponding path program 1 times [2020-10-27 23:43:06,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:43:06,005 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1911739406] [2020-10-27 23:43:06,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:43:06,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:43:06,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:06,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:06,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:06,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:06,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:06,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:06,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:07,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:07,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:08,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:08,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:08,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:08,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:09,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:11,028 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:43:11,028 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-27 23:43:11,028 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-27 23:43:11,029 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-27 23:43:11,029 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:43:11,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 23:43:11,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-27 23:43:11,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-27 23:43:11,029 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:43:11,415 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2020-10-27 23:43:11,416 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:43:11,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:43:11,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:11,437 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:43:11,437 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:43:11,437 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:43:11,437 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-27 23:43:11,437 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:43:11,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:43:11,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:43:11,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:43:11,438 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:43:11,449 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:43:11,449 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1911739406] [2020-10-27 23:43:11,449 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:43:11,449 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-27 23:43:11,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629765977] [2020-10-27 23:43:11,450 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 23:43:11,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:43:11,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 23:43:11,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-27 23:43:11,451 INFO L87 Difference]: Start difference. First operand 3324 states and 4837 transitions. Second operand 10 states. [2020-10-27 23:43:11,796 WARN L193 SmtUtils]: Spent 268.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-27 23:43:13,474 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 179 [2020-10-27 23:43:16,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:43:16,478 INFO L93 Difference]: Finished difference Result 11979 states and 17664 transitions. [2020-10-27 23:43:16,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-27 23:43:16,478 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 55 [2020-10-27 23:43:16,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:43:16,512 INFO L225 Difference]: With dead ends: 11979 [2020-10-27 23:43:16,513 INFO L226 Difference]: Without dead ends: 11972 [2020-10-27 23:43:16,517 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 311 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=231, Invalid=959, Unknown=0, NotChecked=0, Total=1190 [2020-10-27 23:43:16,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11972 states. [2020-10-27 23:43:17,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11972 to 3353. [2020-10-27 23:43:17,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3353 states. [2020-10-27 23:43:17,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3353 states to 3353 states and 4877 transitions. [2020-10-27 23:43:17,253 INFO L78 Accepts]: Start accepts. Automaton has 3353 states and 4877 transitions. Word has length 55 [2020-10-27 23:43:17,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:43:17,253 INFO L481 AbstractCegarLoop]: Abstraction has 3353 states and 4877 transitions. [2020-10-27 23:43:17,253 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 23:43:17,253 INFO L276 IsEmpty]: Start isEmpty. Operand 3353 states and 4877 transitions. [2020-10-27 23:43:17,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-27 23:43:17,255 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:43:17,256 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:43:17,256 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 23:43:17,256 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:43:17,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:43:17,256 INFO L82 PathProgramCache]: Analyzing trace with hash -265408560, now seen corresponding path program 1 times [2020-10-27 23:43:17,256 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:43:17,257 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1880724897] [2020-10-27 23:43:17,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:43:17,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:43:17,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:17,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:17,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:17,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:17,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:17,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:17,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:18,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:18,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:18,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:18,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:19,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:19,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:21,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:22,280 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:43:22,280 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-27 23:43:22,280 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-27 23:43:22,281 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-27 23:43:22,281 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:43:22,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 23:43:22,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-27 23:43:22,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-27 23:43:22,281 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:43:22,648 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2020-10-27 23:43:22,649 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:43:22,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:43:22,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:22,660 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:43:22,660 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:43:22,660 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:43:22,660 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 23:43:22,660 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:43:22,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:43:22,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:43:22,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:43:22,661 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:43:22,670 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:43:22,670 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1880724897] [2020-10-27 23:43:22,671 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:43:22,671 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-10-27 23:43:22,671 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160446562] [2020-10-27 23:43:22,671 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 23:43:22,671 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:43:22,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 23:43:22,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2020-10-27 23:43:22,672 INFO L87 Difference]: Start difference. First operand 3353 states and 4877 transitions. Second operand 11 states. [2020-10-27 23:43:23,360 WARN L193 SmtUtils]: Spent 531.00 ms on a formula simplification. DAG size of input: 198 DAG size of output: 197 [2020-10-27 23:43:24,737 WARN L193 SmtUtils]: Spent 244.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-10-27 23:43:25,046 WARN L193 SmtUtils]: Spent 236.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-10-27 23:43:26,577 WARN L193 SmtUtils]: Spent 266.00 ms on a formula simplification that was a NOOP. DAG size: 183 [2020-10-27 23:43:26,886 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification that was a NOOP. DAG size: 182 [2020-10-27 23:43:27,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:43:27,761 INFO L93 Difference]: Finished difference Result 9385 states and 13603 transitions. [2020-10-27 23:43:27,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-27 23:43:27,763 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 55 [2020-10-27 23:43:27,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:43:27,787 INFO L225 Difference]: With dead ends: 9385 [2020-10-27 23:43:27,787 INFO L226 Difference]: Without dead ends: 9377 [2020-10-27 23:43:27,791 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=212, Invalid=780, Unknown=0, NotChecked=0, Total=992 [2020-10-27 23:43:27,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9377 states. [2020-10-27 23:43:28,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9377 to 3355. [2020-10-27 23:43:28,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3355 states. [2020-10-27 23:43:28,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3355 states to 3355 states and 4878 transitions. [2020-10-27 23:43:28,595 INFO L78 Accepts]: Start accepts. Automaton has 3355 states and 4878 transitions. Word has length 55 [2020-10-27 23:43:28,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:43:28,595 INFO L481 AbstractCegarLoop]: Abstraction has 3355 states and 4878 transitions. [2020-10-27 23:43:28,596 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 23:43:28,596 INFO L276 IsEmpty]: Start isEmpty. Operand 3355 states and 4878 transitions. [2020-10-27 23:43:28,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-27 23:43:28,597 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:43:28,598 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:43:28,598 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 23:43:28,598 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:43:28,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:43:28,598 INFO L82 PathProgramCache]: Analyzing trace with hash -1254017512, now seen corresponding path program 1 times [2020-10-27 23:43:28,599 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:43:28,599 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1459591161] [2020-10-27 23:43:28,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:43:28,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:43:28,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:28,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:28,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:28,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:29,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:29,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:29,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:29,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:29,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:29,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:30,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:30,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:30,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:30,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:30,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:31,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:31,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:31,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:33,627 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:43:33,627 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-27 23:43:33,628 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 18 [2020-10-27 23:43:33,628 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-27 23:43:33,628 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:43:33,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 23:43:33,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-27 23:43:33,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-27 23:43:33,628 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:43:33,945 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2020-10-27 23:43:33,946 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:43:33,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:43:33,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:33,958 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:43:33,958 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:43:33,958 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:43:33,958 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 23:43:33,958 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:43:33,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:43:33,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:43:33,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:43:33,959 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:43:33,968 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:43:33,968 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1459591161] [2020-10-27 23:43:33,968 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:43:33,969 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-27 23:43:33,969 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811815931] [2020-10-27 23:43:33,969 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 23:43:33,969 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:43:33,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 23:43:33,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-10-27 23:43:33,970 INFO L87 Difference]: Start difference. First operand 3355 states and 4878 transitions. Second operand 10 states. [2020-10-27 23:43:34,295 WARN L193 SmtUtils]: Spent 253.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-10-27 23:43:35,356 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 179 [2020-10-27 23:43:36,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:43:36,418 INFO L93 Difference]: Finished difference Result 4846 states and 7063 transitions. [2020-10-27 23:43:36,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 23:43:36,418 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 55 [2020-10-27 23:43:36,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:43:36,429 INFO L225 Difference]: With dead ends: 4846 [2020-10-27 23:43:36,429 INFO L226 Difference]: Without dead ends: 4841 [2020-10-27 23:43:36,432 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-10-27 23:43:36,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4841 states. [2020-10-27 23:43:37,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4841 to 3355. [2020-10-27 23:43:37,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3355 states. [2020-10-27 23:43:37,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3355 states to 3355 states and 4878 transitions. [2020-10-27 23:43:37,229 INFO L78 Accepts]: Start accepts. Automaton has 3355 states and 4878 transitions. Word has length 55 [2020-10-27 23:43:37,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:43:37,229 INFO L481 AbstractCegarLoop]: Abstraction has 3355 states and 4878 transitions. [2020-10-27 23:43:37,229 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 23:43:37,229 INFO L276 IsEmpty]: Start isEmpty. Operand 3355 states and 4878 transitions. [2020-10-27 23:43:37,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-27 23:43:37,231 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:43:37,231 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:43:37,231 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-27 23:43:37,232 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:43:37,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:43:37,232 INFO L82 PathProgramCache]: Analyzing trace with hash -1162461355, now seen corresponding path program 1 times [2020-10-27 23:43:37,232 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:43:37,232 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1305416138] [2020-10-27 23:43:37,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:43:37,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:43:37,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:37,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:37,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:37,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:37,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:37,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:38,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:38,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:39,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:39,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:39,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:40,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:40,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:40,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:40,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:40,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:40,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:40,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:41,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:41,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:42,257 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:43:42,257 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-27 23:43:42,257 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 20 [2020-10-27 23:43:42,258 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-27 23:43:42,258 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:43:42,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 23:43:42,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-27 23:43:42,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-27 23:43:42,258 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:43:42,604 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2020-10-27 23:43:42,605 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:43:42,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:43:42,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:42,624 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:43:42,625 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:43:42,625 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:43:42,625 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-27 23:43:42,625 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:43:42,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:43:42,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:43:42,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:43:42,626 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:43:42,641 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:43:42,642 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1305416138] [2020-10-27 23:43:42,642 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:43:42,642 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-27 23:43:42,642 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189623877] [2020-10-27 23:43:42,643 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 23:43:42,643 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:43:42,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 23:43:42,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-10-27 23:43:42,644 INFO L87 Difference]: Start difference. First operand 3355 states and 4878 transitions. Second operand 10 states. [2020-10-27 23:43:42,914 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 179 [2020-10-27 23:43:43,961 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-10-27 23:43:45,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:43:45,039 INFO L93 Difference]: Finished difference Result 6552 states and 9664 transitions. [2020-10-27 23:43:45,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 23:43:45,039 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 55 [2020-10-27 23:43:45,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:43:45,047 INFO L225 Difference]: With dead ends: 6552 [2020-10-27 23:43:45,047 INFO L226 Difference]: Without dead ends: 4810 [2020-10-27 23:43:45,052 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-10-27 23:43:45,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4810 states. [2020-10-27 23:43:45,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4810 to 3329. [2020-10-27 23:43:45,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3329 states. [2020-10-27 23:43:45,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3329 states to 3329 states and 4838 transitions. [2020-10-27 23:43:45,746 INFO L78 Accepts]: Start accepts. Automaton has 3329 states and 4838 transitions. Word has length 55 [2020-10-27 23:43:45,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:43:45,746 INFO L481 AbstractCegarLoop]: Abstraction has 3329 states and 4838 transitions. [2020-10-27 23:43:45,746 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 23:43:45,746 INFO L276 IsEmpty]: Start isEmpty. Operand 3329 states and 4838 transitions. [2020-10-27 23:43:45,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-27 23:43:45,748 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:43:45,748 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] [2020-10-27 23:43:45,748 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-27 23:43:45,749 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:43:45,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:43:45,749 INFO L82 PathProgramCache]: Analyzing trace with hash -1061914700, now seen corresponding path program 1 times [2020-10-27 23:43:45,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:43:45,749 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2141318541] [2020-10-27 23:43:45,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:43:45,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:43:45,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:45,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:45,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:46,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:46,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:46,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:46,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:46,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:46,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:46,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:47,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:47,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:47,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:48,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:49,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:49,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:49,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:49,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:50,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:50,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:50,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:50,779 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:43:50,780 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-27 23:43:50,780 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 21 [2020-10-27 23:43:50,780 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-27 23:43:50,780 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:43:50,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 23:43:50,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-27 23:43:50,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-27 23:43:50,780 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:43:51,171 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2020-10-27 23:43:51,172 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:43:51,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:43:51,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:51,187 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:43:51,187 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:43:51,187 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:43:51,187 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 23:43:51,187 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:43:51,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:43:51,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:43:51,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:43:51,188 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:43:51,203 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:43:51,204 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2141318541] [2020-10-27 23:43:51,204 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:43:51,204 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-10-27 23:43:51,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332002336] [2020-10-27 23:43:51,205 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 23:43:51,205 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:43:51,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 23:43:51,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2020-10-27 23:43:51,206 INFO L87 Difference]: Start difference. First operand 3329 states and 4838 transitions. Second operand 11 states. [2020-10-27 23:43:51,535 WARN L193 SmtUtils]: Spent 259.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-27 23:43:53,011 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 179 [2020-10-27 23:43:53,309 WARN L193 SmtUtils]: Spent 252.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-10-27 23:43:53,589 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification that was a NOOP. DAG size: 183 [2020-10-27 23:43:55,504 WARN L193 SmtUtils]: Spent 250.00 ms on a formula simplification that was a NOOP. DAG size: 194 [2020-10-27 23:43:57,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:43:57,554 INFO L93 Difference]: Finished difference Result 10804 states and 15671 transitions. [2020-10-27 23:43:57,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-27 23:43:57,555 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 55 [2020-10-27 23:43:57,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:43:57,568 INFO L225 Difference]: With dead ends: 10804 [2020-10-27 23:43:57,568 INFO L226 Difference]: Without dead ends: 10798 [2020-10-27 23:43:57,571 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=256, Invalid=934, Unknown=0, NotChecked=0, Total=1190 [2020-10-27 23:43:57,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10798 states. [2020-10-27 23:43:58,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10798 to 3329. [2020-10-27 23:43:58,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3329 states. [2020-10-27 23:43:58,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3329 states to 3329 states and 4837 transitions. [2020-10-27 23:43:58,342 INFO L78 Accepts]: Start accepts. Automaton has 3329 states and 4837 transitions. Word has length 55 [2020-10-27 23:43:58,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:43:58,342 INFO L481 AbstractCegarLoop]: Abstraction has 3329 states and 4837 transitions. [2020-10-27 23:43:58,342 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 23:43:58,343 INFO L276 IsEmpty]: Start isEmpty. Operand 3329 states and 4837 transitions. [2020-10-27 23:43:58,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-27 23:43:58,344 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:43:58,344 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:43:58,344 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-27 23:43:58,344 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:43:58,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:43:58,345 INFO L82 PathProgramCache]: Analyzing trace with hash 1508776790, now seen corresponding path program 1 times [2020-10-27 23:43:58,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:43:58,345 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1240310257] [2020-10-27 23:43:58,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:43:58,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:43:58,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:58,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:58,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:58,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:59,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:59,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:59,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:59,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:00,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:00,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:03,372 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:44:03,372 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-27 23:44:03,372 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-27 23:44:03,372 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-27 23:44:03,372 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:44:03,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 23:44:03,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-27 23:44:03,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-27 23:44:03,373 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:44:03,664 WARN L193 SmtUtils]: Spent 242.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2020-10-27 23:44:03,665 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:44:03,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:44:03,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:03,678 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:44:03,678 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:44:03,678 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:44:03,678 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 23:44:03,678 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:44:03,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:44:03,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:44:03,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:44:03,679 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:44:03,690 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:44:03,690 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1240310257] [2020-10-27 23:44:03,690 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:44:03,690 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 23:44:03,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126183106] [2020-10-27 23:44:03,693 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 23:44:03,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:44:03,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 23:44:03,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 23:44:03,694 INFO L87 Difference]: Start difference. First operand 3329 states and 4837 transitions. Second operand 6 states. [2020-10-27 23:44:03,944 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 179 [2020-10-27 23:44:05,112 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification that was a NOOP. DAG size: 180 [2020-10-27 23:44:05,481 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 179 [2020-10-27 23:44:07,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:44:07,872 INFO L93 Difference]: Finished difference Result 7752 states and 11421 transitions. [2020-10-27 23:44:07,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 23:44:07,872 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 55 [2020-10-27 23:44:07,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:44:07,881 INFO L225 Difference]: With dead ends: 7752 [2020-10-27 23:44:07,881 INFO L226 Difference]: Without dead ends: 7734 [2020-10-27 23:44:07,883 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-27 23:44:07,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7734 states. [2020-10-27 23:44:08,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7734 to 3325. [2020-10-27 23:44:08,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3325 states. [2020-10-27 23:44:08,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3325 states to 3325 states and 4829 transitions. [2020-10-27 23:44:08,630 INFO L78 Accepts]: Start accepts. Automaton has 3325 states and 4829 transitions. Word has length 55 [2020-10-27 23:44:08,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:44:08,631 INFO L481 AbstractCegarLoop]: Abstraction has 3325 states and 4829 transitions. [2020-10-27 23:44:08,631 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 23:44:08,631 INFO L276 IsEmpty]: Start isEmpty. Operand 3325 states and 4829 transitions. [2020-10-27 23:44:08,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-27 23:44:08,632 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:44:08,632 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:44:08,632 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-27 23:44:08,632 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:44:08,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:44:08,632 INFO L82 PathProgramCache]: Analyzing trace with hash 1794926168, now seen corresponding path program 1 times [2020-10-27 23:44:08,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:44:08,633 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [747572774] [2020-10-27 23:44:08,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:44:08,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:44:08,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:08,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:08,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:08,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:08,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:08,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:09,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:09,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:09,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:09,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:09,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:11,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:11,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:11,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:13,653 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:44:13,653 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-27 23:44:13,653 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-27 23:44:13,653 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-27 23:44:13,653 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:44:13,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 23:44:13,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-27 23:44:13,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-27 23:44:13,654 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:44:13,995 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2020-10-27 23:44:13,996 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:44:14,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:44:14,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:14,008 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:44:14,009 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:44:14,009 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:44:14,009 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 23:44:14,009 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:44:14,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:44:14,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:44:14,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:44:14,009 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:44:14,019 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:44:14,020 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [747572774] [2020-10-27 23:44:14,020 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:44:14,020 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-27 23:44:14,020 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705726632] [2020-10-27 23:44:14,021 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 23:44:14,021 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:44:14,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 23:44:14,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-27 23:44:14,021 INFO L87 Difference]: Start difference. First operand 3325 states and 4829 transitions. Second operand 10 states. [2020-10-27 23:44:14,402 WARN L193 SmtUtils]: Spent 258.00 ms on a formula simplification that was a NOOP. DAG size: 193 [2020-10-27 23:44:15,592 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 179 [2020-10-27 23:44:17,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:44:17,179 INFO L93 Difference]: Finished difference Result 5929 states and 8748 transitions. [2020-10-27 23:44:17,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-27 23:44:17,179 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 55 [2020-10-27 23:44:17,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:44:17,184 INFO L225 Difference]: With dead ends: 5929 [2020-10-27 23:44:17,185 INFO L226 Difference]: Without dead ends: 5912 [2020-10-27 23:44:17,186 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=97, Invalid=323, Unknown=0, NotChecked=0, Total=420 [2020-10-27 23:44:17,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5912 states. [2020-10-27 23:44:17,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5912 to 3322. [2020-10-27 23:44:17,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3322 states. [2020-10-27 23:44:17,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3322 states to 3322 states and 4824 transitions. [2020-10-27 23:44:17,756 INFO L78 Accepts]: Start accepts. Automaton has 3322 states and 4824 transitions. Word has length 55 [2020-10-27 23:44:17,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:44:17,756 INFO L481 AbstractCegarLoop]: Abstraction has 3322 states and 4824 transitions. [2020-10-27 23:44:17,756 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 23:44:17,756 INFO L276 IsEmpty]: Start isEmpty. Operand 3322 states and 4824 transitions. [2020-10-27 23:44:17,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-27 23:44:17,757 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:44:17,758 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:44:17,758 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-27 23:44:17,758 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:44:17,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:44:17,758 INFO L82 PathProgramCache]: Analyzing trace with hash -1738152195, now seen corresponding path program 1 times [2020-10-27 23:44:17,759 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:44:17,759 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1915205841] [2020-10-27 23:44:17,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:44:17,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:44:17,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:17,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:17,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:17,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:18,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:18,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:18,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:18,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:18,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:18,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:18,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:18,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:18,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:19,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:19,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:20,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:20,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:20,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:21,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:21,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:21,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:21,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:22,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:22,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:22,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:22,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:22,785 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:44:22,785 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-27 23:44:22,785 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 26 [2020-10-27 23:44:22,785 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-27 23:44:22,785 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:44:22,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 23:44:22,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-27 23:44:22,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-27 23:44:22,786 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:44:23,183 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2020-10-27 23:44:23,184 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:44:23,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:44:23,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:23,198 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:44:23,198 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:44:23,198 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:44:23,199 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 23:44:23,199 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:44:23,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:44:23,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:44:23,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:44:23,199 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:44:23,214 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:44:23,215 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1915205841] [2020-10-27 23:44:23,215 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:44:23,215 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-10-27 23:44:23,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830014376] [2020-10-27 23:44:23,216 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 23:44:23,216 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:44:23,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 23:44:23,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2020-10-27 23:44:23,216 INFO L87 Difference]: Start difference. First operand 3322 states and 4824 transitions. Second operand 11 states. [2020-10-27 23:44:23,488 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 179 [2020-10-27 23:44:24,731 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 183 [2020-10-27 23:44:25,021 WARN L193 SmtUtils]: Spent 249.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-10-27 23:44:26,650 WARN L193 SmtUtils]: Spent 239.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-10-27 23:44:27,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:44:27,382 INFO L93 Difference]: Finished difference Result 7339 states and 10577 transitions. [2020-10-27 23:44:27,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-27 23:44:27,383 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 56 [2020-10-27 23:44:27,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:44:27,391 INFO L225 Difference]: With dead ends: 7339 [2020-10-27 23:44:27,391 INFO L226 Difference]: Without dead ends: 7334 [2020-10-27 23:44:27,393 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=137, Invalid=513, Unknown=0, NotChecked=0, Total=650 [2020-10-27 23:44:27,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7334 states. [2020-10-27 23:44:28,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7334 to 3315. [2020-10-27 23:44:28,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3315 states. [2020-10-27 23:44:28,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3315 states to 3315 states and 4815 transitions. [2020-10-27 23:44:28,096 INFO L78 Accepts]: Start accepts. Automaton has 3315 states and 4815 transitions. Word has length 56 [2020-10-27 23:44:28,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:44:28,096 INFO L481 AbstractCegarLoop]: Abstraction has 3315 states and 4815 transitions. [2020-10-27 23:44:28,097 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 23:44:28,097 INFO L276 IsEmpty]: Start isEmpty. Operand 3315 states and 4815 transitions. [2020-10-27 23:44:28,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-27 23:44:28,098 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:44:28,098 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:44:28,098 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-27 23:44:28,098 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:44:28,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:44:28,098 INFO L82 PathProgramCache]: Analyzing trace with hash -1866708799, now seen corresponding path program 1 times [2020-10-27 23:44:28,099 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:44:28,099 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [627989773] [2020-10-27 23:44:28,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:44:28,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:44:28,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:28,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:28,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:28,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:28,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:28,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:28,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:28,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:29,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:29,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:29,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:29,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:29,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:29,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:29,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:29,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:31,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:31,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:31,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:31,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:31,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:31,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:32,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:33,116 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:44:33,116 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-27 23:44:33,116 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 23 [2020-10-27 23:44:33,116 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-27 23:44:33,116 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:44:33,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 23:44:33,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-27 23:44:33,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-27 23:44:33,117 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:44:33,509 WARN L193 SmtUtils]: Spent 260.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2020-10-27 23:44:33,510 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:44:33,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:44:33,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:33,531 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:44:33,531 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:44:33,531 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:44:33,531 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-27 23:44:33,532 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:44:33,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:44:33,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:44:33,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:44:33,533 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:44:33,556 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:44:33,557 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [627989773] [2020-10-27 23:44:33,557 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:44:33,557 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-27 23:44:33,557 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545576883] [2020-10-27 23:44:33,558 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 23:44:33,558 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:44:33,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 23:44:33,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-10-27 23:44:33,559 INFO L87 Difference]: Start difference. First operand 3315 states and 4815 transitions. Second operand 10 states. [2020-10-27 23:44:33,875 WARN L193 SmtUtils]: Spent 247.00 ms on a formula simplification that was a NOOP. DAG size: 179 [2020-10-27 23:44:35,104 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-27 23:44:36,441 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 180 [2020-10-27 23:44:37,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:44:37,305 INFO L93 Difference]: Finished difference Result 7766 states and 11262 transitions. [2020-10-27 23:44:37,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 23:44:37,306 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 56 [2020-10-27 23:44:37,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:44:37,316 INFO L225 Difference]: With dead ends: 7766 [2020-10-27 23:44:37,316 INFO L226 Difference]: Without dead ends: 6856 [2020-10-27 23:44:37,320 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=99, Invalid=321, Unknown=0, NotChecked=0, Total=420 [2020-10-27 23:44:37,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6856 states. [2020-10-27 23:44:38,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6856 to 3298. [2020-10-27 23:44:38,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3298 states. [2020-10-27 23:44:38,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3298 states to 3298 states and 4790 transitions. [2020-10-27 23:44:38,048 INFO L78 Accepts]: Start accepts. Automaton has 3298 states and 4790 transitions. Word has length 56 [2020-10-27 23:44:38,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:44:38,049 INFO L481 AbstractCegarLoop]: Abstraction has 3298 states and 4790 transitions. [2020-10-27 23:44:38,049 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 23:44:38,049 INFO L276 IsEmpty]: Start isEmpty. Operand 3298 states and 4790 transitions. [2020-10-27 23:44:38,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-27 23:44:38,050 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:44:38,051 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:44:38,051 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-27 23:44:38,051 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:44:38,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:44:38,051 INFO L82 PathProgramCache]: Analyzing trace with hash 351753972, now seen corresponding path program 1 times [2020-10-27 23:44:38,052 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:44:38,052 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1700031332] [2020-10-27 23:44:38,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:44:38,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:44:38,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:38,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:38,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:38,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:38,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:38,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:38,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:38,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:38,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:38,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:39,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:39,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:39,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:40,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:40,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:40,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:40,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:40,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:40,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:41,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:41,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:41,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:41,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:42,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:42,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:42,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:42,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:43,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:43,078 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:44:43,078 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-27 23:44:43,078 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 28 [2020-10-27 23:44:43,078 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-27 23:44:43,078 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:44:43,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 23:44:43,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-27 23:44:43,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-27 23:44:43,079 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:44:43,394 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2020-10-27 23:44:43,395 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:44:43,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:44:43,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:43,409 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:44:43,410 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:44:43,410 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:44:43,410 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-27 23:44:43,410 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:44:43,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:44:43,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:44:43,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:44:43,411 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:44:43,420 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:44:43,421 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1700031332] [2020-10-27 23:44:43,421 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:44:43,421 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-27 23:44:43,421 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647830767] [2020-10-27 23:44:43,421 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 23:44:43,421 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:44:43,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 23:44:43,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-10-27 23:44:43,422 INFO L87 Difference]: Start difference. First operand 3298 states and 4790 transitions. Second operand 10 states. [2020-10-27 23:44:43,685 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 179 [2020-10-27 23:44:44,890 WARN L193 SmtUtils]: Spent 237.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-27 23:44:46,201 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification that was a NOOP. DAG size: 180 [2020-10-27 23:44:47,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:44:47,100 INFO L93 Difference]: Finished difference Result 7746 states and 11234 transitions. [2020-10-27 23:44:47,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 23:44:47,103 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 56 [2020-10-27 23:44:47,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:44:47,110 INFO L225 Difference]: With dead ends: 7746 [2020-10-27 23:44:47,110 INFO L226 Difference]: Without dead ends: 6840 [2020-10-27 23:44:47,114 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=99, Invalid=321, Unknown=0, NotChecked=0, Total=420 [2020-10-27 23:44:47,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6840 states. [2020-10-27 23:44:47,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6840 to 3297. [2020-10-27 23:44:47,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3297 states. [2020-10-27 23:44:47,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3297 states to 3297 states and 4788 transitions. [2020-10-27 23:44:47,790 INFO L78 Accepts]: Start accepts. Automaton has 3297 states and 4788 transitions. Word has length 56 [2020-10-27 23:44:47,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:44:47,790 INFO L481 AbstractCegarLoop]: Abstraction has 3297 states and 4788 transitions. [2020-10-27 23:44:47,790 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 23:44:47,791 INFO L276 IsEmpty]: Start isEmpty. Operand 3297 states and 4788 transitions. [2020-10-27 23:44:47,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-27 23:44:47,792 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:44:47,792 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:44:47,792 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-27 23:44:47,793 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:44:47,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:44:47,793 INFO L82 PathProgramCache]: Analyzing trace with hash -542008969, now seen corresponding path program 1 times [2020-10-27 23:44:47,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:44:47,793 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1815275234] [2020-10-27 23:44:47,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:44:47,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:44:47,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:47,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:47,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:47,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:48,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:48,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:48,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:48,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:48,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:48,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:48,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking...