/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-var-start-time.3.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 00:03:44,063 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 00:03:44,065 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 00:03:44,107 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 00:03:44,108 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 00:03:44,116 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 00:03:44,118 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 00:03:44,123 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 00:03:44,127 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 00:03:44,134 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 00:03:44,135 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 00:03:44,137 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 00:03:44,138 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 00:03:44,141 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 00:03:44,145 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 00:03:44,148 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 00:03:44,149 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 00:03:44,151 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 00:03:44,160 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 00:03:44,165 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 00:03:44,167 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 00:03:44,170 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 00:03:44,172 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 00:03:44,175 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 00:03:44,186 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 00:03:44,186 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 00:03:44,186 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 00:03:44,188 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 00:03:44,188 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 00:03:44,190 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 00:03:44,191 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 00:03:44,192 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 00:03:44,194 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 00:03:44,195 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 00:03:44,196 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 00:03:44,197 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 00:03:44,198 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 00:03:44,198 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 00:03:44,198 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 00:03:44,199 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 00:03:44,200 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 00:03:44,208 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 [2020-10-28 00:03:44,249 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 00:03:44,250 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 00:03:44,251 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 00:03:44,252 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 00:03:44,252 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 00:03:44,252 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 00:03:44,252 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 00:03:44,252 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 00:03:44,253 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 00:03:44,253 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 00:03:44,253 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 00:03:44,253 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 00:03:44,253 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 00:03:44,254 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 00:03:44,254 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 00:03:44,257 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 00:03:44,257 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 00:03:44,258 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 00:03:44,258 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 00:03:44,258 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 00:03:44,258 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 00:03:44,258 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 00:03:44,258 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 00:03:44,259 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 00:03:44,259 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 00:03:44,259 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 00:03:44,259 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 00:03:44,259 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 00:03:44,260 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 00:03:44,260 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-28 00:03:44,689 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 00:03:44,718 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 00:03:44,721 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 00:03:44,722 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 00:03:44,723 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 00:03:44,724 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.3.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-10-28 00:03:44,809 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e5a2c00ea/5bd052f70c364c4da5ea7faf555919e1/FLAG6f069ff87 [2020-10-28 00:03:45,720 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 00:03:45,721 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.3.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-10-28 00:03:45,762 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e5a2c00ea/5bd052f70c364c4da5ea7faf555919e1/FLAG6f069ff87 [2020-10-28 00:03:45,866 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e5a2c00ea/5bd052f70c364c4da5ea7faf555919e1 [2020-10-28 00:03:45,871 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 00:03:45,882 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 00:03:45,887 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 00:03:45,887 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 00:03:45,892 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 00:03:45,894 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 12:03:45" (1/1) ... [2020-10-28 00:03:45,899 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@52d808d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:03:45, skipping insertion in model container [2020-10-28 00:03:45,900 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 12:03:45" (1/1) ... [2020-10-28 00:03:45,909 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 00:03:46,032 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 00:03:46,769 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 00:03:46,783 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 00:03:47,134 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 00:03:47,168 INFO L208 MainTranslator]: Completed translation [2020-10-28 00:03:47,170 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:03:47 WrapperNode [2020-10-28 00:03:47,170 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 00:03:47,172 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 00:03:47,172 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 00:03:47,172 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 00:03:47,189 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:03:47" (1/1) ... [2020-10-28 00:03:47,192 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:03:47" (1/1) ... [2020-10-28 00:03:47,251 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:03:47" (1/1) ... [2020-10-28 00:03:47,253 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:03:47" (1/1) ... [2020-10-28 00:03:47,337 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:03:47" (1/1) ... [2020-10-28 00:03:47,369 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:03:47" (1/1) ... [2020-10-28 00:03:47,379 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:03:47" (1/1) ... [2020-10-28 00:03:47,392 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 00:03:47,393 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 00:03:47,393 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 00:03:47,393 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 00:03:47,394 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:03:47" (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 [2020-10-28 00:03:47,498 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 00:03:47,498 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 00:03:47,498 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 00:03:47,499 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-28 00:03:47,499 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 00:03:47,499 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 00:03:47,499 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 00:03:47,499 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 00:03:47,500 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 00:03:47,500 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-28 00:03:47,500 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-28 00:03:47,500 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-10-28 00:03:47,500 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-28 00:03:47,501 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-28 00:03:47,501 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-28 00:03:47,501 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-28 00:03:47,501 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-28 00:03:47,501 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-28 00:03:47,502 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-28 00:03:47,502 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-28 00:03:47,502 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-28 00:03:47,502 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 00:03:47,502 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 00:03:47,502 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 00:03:47,503 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 00:03:47,503 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 00:03:47,503 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 00:03:47,503 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 00:03:49,808 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 00:03:49,808 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-28 00:03:49,811 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 12:03:49 BoogieIcfgContainer [2020-10-28 00:03:49,811 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 00:03:49,813 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 00:03:49,813 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 00:03:49,817 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 00:03:49,817 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 12:03:45" (1/3) ... [2020-10-28 00:03:49,818 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35847d11 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 12:03:49, skipping insertion in model container [2020-10-28 00:03:49,819 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:03:47" (2/3) ... [2020-10-28 00:03:49,819 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35847d11 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 12:03:49, skipping insertion in model container [2020-10-28 00:03:49,819 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 12:03:49" (3/3) ... [2020-10-28 00:03:49,821 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.3.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-10-28 00:03:49,835 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 00:03:49,842 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 00:03:49,857 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 00:03:49,900 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 00:03:49,901 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 00:03:49,901 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 00:03:49,901 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 00:03:49,901 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 00:03:49,902 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 00:03:49,902 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 00:03:49,902 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 00:03:49,970 INFO L276 IsEmpty]: Start isEmpty. Operand 465 states. [2020-10-28 00:03:49,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-28 00:03:49,996 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:03:49,997 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] [2020-10-28 00:03:49,997 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:03:50,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:03:50,003 INFO L82 PathProgramCache]: Analyzing trace with hash 1101731786, now seen corresponding path program 1 times [2020-10-28 00:03:50,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:03:50,013 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [766802510] [2020-10-28 00:03:50,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:03:50,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:03:50,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:03:50,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:03:50,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:03:51,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:03:51,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:03:52,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:03:52,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:03:54,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:03:55,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:03:55,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:03:55,452 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:03:55,452 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-28 00:03:55,452 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-28 00:03:55,452 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-28 00:03:55,455 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:03:55,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 00:03:55,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-28 00:03:55,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-28 00:03:55,456 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 00:03:55,781 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 25 [2020-10-28 00:03:56,775 WARN L193 SmtUtils]: Spent 874.00 ms on a formula simplification that was a NOOP. DAG size: 292 [2020-10-28 00:03:56,777 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:03:56,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:03:56,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:03:56,811 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:03:56,811 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:03:56,811 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:03:56,811 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-28 00:03:56,812 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:03:56,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:03:56,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:03:56,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:03:56,812 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:03:56,850 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:03:56,850 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [766802510] [2020-10-28 00:03:56,852 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:03:56,853 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-28 00:03:56,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51008205] [2020-10-28 00:03:56,858 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 00:03:56,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:03:56,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 00:03:56,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-28 00:03:56,877 INFO L87 Difference]: Start difference. First operand 465 states. Second operand 9 states. [2020-10-28 00:03:57,772 WARN L193 SmtUtils]: Spent 754.00 ms on a formula simplification that was a NOOP. DAG size: 316 [2020-10-28 00:04:03,574 WARN L193 SmtUtils]: Spent 717.00 ms on a formula simplification that was a NOOP. DAG size: 298 [2020-10-28 00:04:06,988 WARN L193 SmtUtils]: Spent 651.00 ms on a formula simplification that was a NOOP. DAG size: 294 [2020-10-28 00:04:07,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:04:07,181 INFO L93 Difference]: Finished difference Result 1016 states and 1715 transitions. [2020-10-28 00:04:07,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-28 00:04:07,184 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 55 [2020-10-28 00:04:07,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:04:07,215 INFO L225 Difference]: With dead ends: 1016 [2020-10-28 00:04:07,216 INFO L226 Difference]: Without dead ends: 879 [2020-10-28 00:04:07,226 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=100, Invalid=406, Unknown=0, NotChecked=0, Total=506 [2020-10-28 00:04:07,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 879 states. [2020-10-28 00:04:07,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 879 to 525. [2020-10-28 00:04:07,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 525 states. [2020-10-28 00:04:07,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 525 states to 525 states and 694 transitions. [2020-10-28 00:04:07,363 INFO L78 Accepts]: Start accepts. Automaton has 525 states and 694 transitions. Word has length 55 [2020-10-28 00:04:07,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:04:07,363 INFO L481 AbstractCegarLoop]: Abstraction has 525 states and 694 transitions. [2020-10-28 00:04:07,364 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 00:04:07,364 INFO L276 IsEmpty]: Start isEmpty. Operand 525 states and 694 transitions. [2020-10-28 00:04:07,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-28 00:04:07,376 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:04:07,376 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] [2020-10-28 00:04:07,377 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 00:04:07,377 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:04:07,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:04:07,378 INFO L82 PathProgramCache]: Analyzing trace with hash -1509376331, now seen corresponding path program 1 times [2020-10-28 00:04:07,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:04:07,379 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1936694163] [2020-10-28 00:04:07,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:04:07,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:04:07,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:04:07,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:04:07,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:04:07,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:04:07,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:04:08,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:04:08,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:04:08,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:04:09,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:04:09,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:04:11,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:04:12,457 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:04:12,458 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-28 00:04:12,458 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-28 00:04:12,458 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5025 [2020-10-28 00:04:12,458 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:04:12,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:04:12,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 34 [2020-10-28 00:04:12,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-28 00:04:12,459 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:04:13,197 WARN L193 SmtUtils]: Spent 644.00 ms on a formula simplification that was a NOOP. DAG size: 292 [2020-10-28 00:04:13,200 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:04:13,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:04:13,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:04:13,250 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:04:13,251 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:04:13,251 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:04:13,251 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 37 [2020-10-28 00:04:13,251 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:04:13,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:04:13,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:04:13,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:04:13,252 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:04:13,280 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:04:13,281 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1936694163] [2020-10-28 00:04:13,281 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:04:13,281 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:04:13,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286489762] [2020-10-28 00:04:13,283 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:04:13,283 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:04:13,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:04:13,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:04:13,285 INFO L87 Difference]: Start difference. First operand 525 states and 694 transitions. Second operand 4 states. [2020-10-28 00:04:14,012 WARN L193 SmtUtils]: Spent 675.00 ms on a formula simplification that was a NOOP. DAG size: 296 [2020-10-28 00:04:16,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:04:16,769 INFO L93 Difference]: Finished difference Result 839 states and 1156 transitions. [2020-10-28 00:04:16,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:04:16,770 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 55 [2020-10-28 00:04:16,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:04:16,777 INFO L225 Difference]: With dead ends: 839 [2020-10-28 00:04:16,777 INFO L226 Difference]: Without dead ends: 668 [2020-10-28 00:04:16,779 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:04:16,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 668 states. [2020-10-28 00:04:16,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 668 to 662. [2020-10-28 00:04:16,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 662 states. [2020-10-28 00:04:16,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 662 states to 662 states and 893 transitions. [2020-10-28 00:04:16,831 INFO L78 Accepts]: Start accepts. Automaton has 662 states and 893 transitions. Word has length 55 [2020-10-28 00:04:16,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:04:16,832 INFO L481 AbstractCegarLoop]: Abstraction has 662 states and 893 transitions. [2020-10-28 00:04:16,832 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:04:16,832 INFO L276 IsEmpty]: Start isEmpty. Operand 662 states and 893 transitions. [2020-10-28 00:04:16,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-28 00:04:16,836 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:04:16,836 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] [2020-10-28 00:04:16,836 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 00:04:16,836 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:04:16,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:04:16,837 INFO L82 PathProgramCache]: Analyzing trace with hash -7844100, now seen corresponding path program 1 times [2020-10-28 00:04:16,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:04:16,838 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [31870095] [2020-10-28 00:04:16,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:04:16,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:04:16,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:04:16,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:04:17,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:04:17,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:04:17,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:04:17,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:04:18,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:04:18,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:04:18,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:04:19,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:04:19,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:04:20,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:04:21,896 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:04:21,897 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-28 00:04:21,897 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-28 00:04:21,897 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-28 00:04:21,898 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:04:21,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 00:04:21,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-28 00:04:21,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-28 00:04:21,898 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:04:22,577 WARN L193 SmtUtils]: Spent 586.00 ms on a formula simplification that was a NOOP. DAG size: 292 [2020-10-28 00:04:22,583 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:04:22,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:04:22,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:04:22,632 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:04:22,633 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:04:22,633 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:04:22,636 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 33 [2020-10-28 00:04:22,636 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:04:22,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:04:22,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:04:22,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:04:22,637 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:04:22,686 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:04:22,687 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [31870095] [2020-10-28 00:04:22,690 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:04:22,691 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-28 00:04:22,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448691172] [2020-10-28 00:04:22,691 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 00:04:22,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:04:22,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 00:04:22,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-28 00:04:22,693 INFO L87 Difference]: Start difference. First operand 662 states and 893 transitions. Second operand 7 states. [2020-10-28 00:04:23,505 WARN L193 SmtUtils]: Spent 738.00 ms on a formula simplification that was a NOOP. DAG size: 296 [2020-10-28 00:04:26,013 WARN L193 SmtUtils]: Spent 714.00 ms on a formula simplification that was a NOOP. DAG size: 298 [2020-10-28 00:04:26,693 WARN L193 SmtUtils]: Spent 651.00 ms on a formula simplification that was a NOOP. DAG size: 293 [2020-10-28 00:04:27,495 WARN L193 SmtUtils]: Spent 684.00 ms on a formula simplification that was a NOOP. DAG size: 296 [2020-10-28 00:04:28,267 WARN L193 SmtUtils]: Spent 672.00 ms on a formula simplification that was a NOOP. DAG size: 294 [2020-10-28 00:04:29,823 WARN L193 SmtUtils]: Spent 631.00 ms on a formula simplification that was a NOOP. DAG size: 295 [2020-10-28 00:04:30,555 WARN L193 SmtUtils]: Spent 671.00 ms on a formula simplification that was a NOOP. DAG size: 294 [2020-10-28 00:04:31,240 WARN L193 SmtUtils]: Spent 640.00 ms on a formula simplification that was a NOOP. DAG size: 296 [2020-10-28 00:04:32,261 WARN L193 SmtUtils]: Spent 693.00 ms on a formula simplification that was a NOOP. DAG size: 297 [2020-10-28 00:04:32,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:04:32,292 INFO L93 Difference]: Finished difference Result 2706 states and 3922 transitions. [2020-10-28 00:04:32,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-28 00:04:32,293 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 55 [2020-10-28 00:04:32,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:04:32,305 INFO L225 Difference]: With dead ends: 2706 [2020-10-28 00:04:32,305 INFO L226 Difference]: Without dead ends: 2142 [2020-10-28 00:04:32,309 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=133, Invalid=329, Unknown=0, NotChecked=0, Total=462 [2020-10-28 00:04:32,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2142 states. [2020-10-28 00:04:32,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2142 to 1714. [2020-10-28 00:04:32,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1714 states. [2020-10-28 00:04:32,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1714 states to 1714 states and 2490 transitions. [2020-10-28 00:04:32,447 INFO L78 Accepts]: Start accepts. Automaton has 1714 states and 2490 transitions. Word has length 55 [2020-10-28 00:04:32,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:04:32,447 INFO L481 AbstractCegarLoop]: Abstraction has 1714 states and 2490 transitions. [2020-10-28 00:04:32,447 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 00:04:32,448 INFO L276 IsEmpty]: Start isEmpty. Operand 1714 states and 2490 transitions. [2020-10-28 00:04:32,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-28 00:04:32,451 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:04:32,451 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:04:32,451 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 00:04:32,451 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:04:32,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:04:32,452 INFO L82 PathProgramCache]: Analyzing trace with hash 425180388, now seen corresponding path program 1 times [2020-10-28 00:04:32,452 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:04:32,452 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [311988471] [2020-10-28 00:04:32,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:04:32,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:04:32,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:04:32,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:04:32,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:04:32,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:04:33,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:04:33,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:04:34,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:04:35,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:04:35,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:04:35,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:04:35,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:04:35,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:04:36,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:04:36,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:04:36,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:04:36,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:04:36,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:04:37,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:04:37,505 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:04:37,505 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-28 00:04:37,505 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 18 [2020-10-28 00:04:37,505 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-28 00:04:37,505 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:04:37,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 00:04:37,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-28 00:04:37,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-28 00:04:37,506 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:04:38,162 WARN L193 SmtUtils]: Spent 579.00 ms on a formula simplification that was a NOOP. DAG size: 292 [2020-10-28 00:04:38,163 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:04:38,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:04:38,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:04:38,196 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:04:38,197 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:04:38,197 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:04:38,197 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-28 00:04:38,197 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:04:38,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:04:38,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:04:38,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:04:38,198 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:04:38,221 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:04:38,222 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [311988471] [2020-10-28 00:04:38,222 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:04:38,223 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 00:04:38,223 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971835974] [2020-10-28 00:04:38,223 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 00:04:38,224 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:04:38,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 00:04:38,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 00:04:38,225 INFO L87 Difference]: Start difference. First operand 1714 states and 2490 transitions. Second operand 6 states. [2020-10-28 00:04:40,622 WARN L193 SmtUtils]: Spent 677.00 ms on a formula simplification that was a NOOP. DAG size: 294 [2020-10-28 00:04:42,323 WARN L193 SmtUtils]: Spent 614.00 ms on a formula simplification that was a NOOP. DAG size: 293 [2020-10-28 00:04:42,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:04:42,698 INFO L93 Difference]: Finished difference Result 6188 states and 9356 transitions. [2020-10-28 00:04:42,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 00:04:42,698 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 56 [2020-10-28 00:04:42,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:04:42,726 INFO L225 Difference]: With dead ends: 6188 [2020-10-28 00:04:42,726 INFO L226 Difference]: Without dead ends: 5251 [2020-10-28 00:04:42,731 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-28 00:04:42,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5251 states. [2020-10-28 00:04:42,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5251 to 1699. [2020-10-28 00:04:42,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1699 states. [2020-10-28 00:04:42,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1699 states to 1699 states and 2457 transitions. [2020-10-28 00:04:42,897 INFO L78 Accepts]: Start accepts. Automaton has 1699 states and 2457 transitions. Word has length 56 [2020-10-28 00:04:42,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:04:42,897 INFO L481 AbstractCegarLoop]: Abstraction has 1699 states and 2457 transitions. [2020-10-28 00:04:42,897 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 00:04:42,897 INFO L276 IsEmpty]: Start isEmpty. Operand 1699 states and 2457 transitions. [2020-10-28 00:04:42,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-28 00:04:42,900 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:04:42,901 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] [2020-10-28 00:04:42,901 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 00:04:42,901 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:04:42,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:04:42,902 INFO L82 PathProgramCache]: Analyzing trace with hash 1666550079, now seen corresponding path program 1 times [2020-10-28 00:04:42,902 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:04:42,902 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1712710329] [2020-10-28 00:04:42,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:04:42,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:04:42,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:04:43,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:04:43,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:04:43,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:04:43,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:04:43,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:04:44,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:04:44,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:04:44,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:04:44,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:04:44,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:04:44,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:04:45,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:04:47,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:04:47,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:04:47,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:04:47,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:04:47,949 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:04:47,950 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-28 00:04:47,950 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 17 [2020-10-28 00:04:47,950 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-28 00:04:47,950 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:04:47,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 00:04:47,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-28 00:04:47,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-28 00:04:47,951 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:04:48,732 WARN L193 SmtUtils]: Spent 687.00 ms on a formula simplification that was a NOOP. DAG size: 292 [2020-10-28 00:04:48,734 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:04:48,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:04:48,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:04:48,759 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:04:48,760 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:04:48,760 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:04:48,760 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-28 00:04:48,760 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:04:48,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:04:48,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:04:48,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:04:48,761 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:04:48,781 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:04:48,781 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1712710329] [2020-10-28 00:04:48,783 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:04:48,783 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-28 00:04:48,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428867200] [2020-10-28 00:04:48,785 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 00:04:48,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:04:48,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 00:04:48,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-28 00:04:48,797 INFO L87 Difference]: Start difference. First operand 1699 states and 2457 transitions. Second operand 7 states. [2020-10-28 00:04:49,536 WARN L193 SmtUtils]: Spent 672.00 ms on a formula simplification that was a NOOP. DAG size: 296 [2020-10-28 00:04:51,675 WARN L193 SmtUtils]: Spent 648.00 ms on a formula simplification that was a NOOP. DAG size: 298 [2020-10-28 00:04:52,390 WARN L193 SmtUtils]: Spent 671.00 ms on a formula simplification that was a NOOP. DAG size: 296 [2020-10-28 00:04:53,161 WARN L193 SmtUtils]: Spent 684.00 ms on a formula simplification that was a NOOP. DAG size: 293 [2020-10-28 00:04:53,868 WARN L193 SmtUtils]: Spent 678.00 ms on a formula simplification that was a NOOP. DAG size: 294 [2020-10-28 00:04:55,556 WARN L193 SmtUtils]: Spent 694.00 ms on a formula simplification that was a NOOP. DAG size: 295 [2020-10-28 00:04:56,320 WARN L193 SmtUtils]: Spent 712.00 ms on a formula simplification that was a NOOP. DAG size: 294 [2020-10-28 00:04:57,034 WARN L193 SmtUtils]: Spent 684.00 ms on a formula simplification that was a NOOP. DAG size: 296 [2020-10-28 00:04:58,157 WARN L193 SmtUtils]: Spent 704.00 ms on a formula simplification that was a NOOP. DAG size: 297 [2020-10-28 00:04:58,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:04:58,196 INFO L93 Difference]: Finished difference Result 7715 states and 11492 transitions. [2020-10-28 00:04:58,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-28 00:04:58,196 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 56 [2020-10-28 00:04:58,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:04:58,227 INFO L225 Difference]: With dead ends: 7715 [2020-10-28 00:04:58,227 INFO L226 Difference]: Without dead ends: 6184 [2020-10-28 00:04:58,233 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=133, Invalid=329, Unknown=0, NotChecked=0, Total=462 [2020-10-28 00:04:58,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6184 states. [2020-10-28 00:04:58,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6184 to 4770. [2020-10-28 00:04:58,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4770 states. [2020-10-28 00:04:58,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4770 states to 4770 states and 6984 transitions. [2020-10-28 00:04:58,667 INFO L78 Accepts]: Start accepts. Automaton has 4770 states and 6984 transitions. Word has length 56 [2020-10-28 00:04:58,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:04:58,667 INFO L481 AbstractCegarLoop]: Abstraction has 4770 states and 6984 transitions. [2020-10-28 00:04:58,667 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 00:04:58,667 INFO L276 IsEmpty]: Start isEmpty. Operand 4770 states and 6984 transitions. [2020-10-28 00:04:58,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-28 00:04:58,670 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:04:58,671 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] [2020-10-28 00:04:58,671 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 00:04:58,671 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:04:58,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:04:58,672 INFO L82 PathProgramCache]: Analyzing trace with hash 658851644, now seen corresponding path program 1 times [2020-10-28 00:04:58,672 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:04:58,672 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1637116972] [2020-10-28 00:04:58,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:04:58,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:04:58,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:04:58,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:04:58,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:04:58,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:04:58,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:04:59,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:05:00,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:05:00,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:05:00,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:05:00,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:05:01,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:05:01,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:05:01,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:05:01,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:05:01,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:05:02,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:05:02,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:05:02,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:05:02,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:05:03,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:05:03,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:05:03,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:05:03,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:05:03,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:05:03,712 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:05:03,712 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-28 00:05:03,712 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 24 [2020-10-28 00:05:03,712 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-28 00:05:03,713 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:05:03,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 00:05:03,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-28 00:05:03,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-28 00:05:03,713 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:05:04,553 WARN L193 SmtUtils]: Spent 767.00 ms on a formula simplification that was a NOOP. DAG size: 292 [2020-10-28 00:05:04,554 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:05:04,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:05:04,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:05:04,574 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:05:04,575 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:05:04,575 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:05:04,575 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-28 00:05:04,575 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:05:04,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:05:04,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:05:04,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:05:04,577 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 00:05:04,596 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:05:04,597 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1637116972] [2020-10-28 00:05:04,599 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:05:04,599 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 00:05:04,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946354673] [2020-10-28 00:05:04,600 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 00:05:04,600 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:05:04,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 00:05:04,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 00:05:04,601 INFO L87 Difference]: Start difference. First operand 4770 states and 6984 transitions. Second operand 6 states. [2020-10-28 00:05:06,595 WARN L193 SmtUtils]: Spent 647.00 ms on a formula simplification that was a NOOP. DAG size: 294 [2020-10-28 00:05:08,074 WARN L193 SmtUtils]: Spent 631.00 ms on a formula simplification that was a NOOP. DAG size: 293 [2020-10-28 00:05:08,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:05:08,722 INFO L93 Difference]: Finished difference Result 18745 states and 27676 transitions. [2020-10-28 00:05:08,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 00:05:08,723 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 56 [2020-10-28 00:05:08,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:05:08,789 INFO L225 Difference]: With dead ends: 18745 [2020-10-28 00:05:08,790 INFO L226 Difference]: Without dead ends: 14646 [2020-10-28 00:05:08,801 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-28 00:05:08,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14646 states. [2020-10-28 00:05:09,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14646 to 3836. [2020-10-28 00:05:09,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3836 states. [2020-10-28 00:05:09,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3836 states to 3836 states and 5596 transitions. [2020-10-28 00:05:09,273 INFO L78 Accepts]: Start accepts. Automaton has 3836 states and 5596 transitions. Word has length 56 [2020-10-28 00:05:09,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:05:09,273 INFO L481 AbstractCegarLoop]: Abstraction has 3836 states and 5596 transitions. [2020-10-28 00:05:09,273 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 00:05:09,273 INFO L276 IsEmpty]: Start isEmpty. Operand 3836 states and 5596 transitions. [2020-10-28 00:05:09,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-28 00:05:09,278 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:05:09,278 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] [2020-10-28 00:05:09,278 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 00:05:09,278 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:05:09,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:05:09,279 INFO L82 PathProgramCache]: Analyzing trace with hash 75918169, now seen corresponding path program 1 times [2020-10-28 00:05:09,279 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:05:09,284 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [906344374] [2020-10-28 00:05:09,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:05:09,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:05:09,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:05:09,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:05:09,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:05:09,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:05:09,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:05:09,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:05:10,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:05:10,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:05:10,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:05:11,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:05:11,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:05:11,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:05:11,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:05:13,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:05:14,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:05:14,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:05:14,322 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:05:14,323 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-28 00:05:14,323 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-28 00:05:14,323 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-28 00:05:14,323 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:05:14,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:05:14,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 38 [2020-10-28 00:05:14,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-28 00:05:14,323 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:05:15,015 WARN L193 SmtUtils]: Spent 625.00 ms on a formula simplification that was a NOOP. DAG size: 292 [2020-10-28 00:05:15,017 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:05:15,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:05:15,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:05:15,037 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:05:15,037 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:05:15,037 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:05:15,038 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-28 00:05:15,038 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:05:15,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:05:15,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:05:15,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:05:15,038 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:05:15,057 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:05:15,058 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [906344374] [2020-10-28 00:05:15,058 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:05:15,058 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:05:15,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694078793] [2020-10-28 00:05:15,059 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:05:15,059 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:05:15,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:05:15,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:05:15,060 INFO L87 Difference]: Start difference. First operand 3836 states and 5596 transitions. Second operand 4 states. [2020-10-28 00:05:15,811 WARN L193 SmtUtils]: Spent 702.00 ms on a formula simplification that was a NOOP. DAG size: 296 [2020-10-28 00:05:18,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:05:18,238 INFO L93 Difference]: Finished difference Result 8942 states and 13206 transitions. [2020-10-28 00:05:18,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:05:18,238 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 56 [2020-10-28 00:05:18,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:05:18,255 INFO L225 Difference]: With dead ends: 8942 [2020-10-28 00:05:18,255 INFO L226 Difference]: Without dead ends: 6056 [2020-10-28 00:05:18,264 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:05:18,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6056 states. [2020-10-28 00:05:18,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6056 to 6005. [2020-10-28 00:05:18,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6005 states. [2020-10-28 00:05:18,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6005 states to 6005 states and 8734 transitions. [2020-10-28 00:05:18,819 INFO L78 Accepts]: Start accepts. Automaton has 6005 states and 8734 transitions. Word has length 56 [2020-10-28 00:05:18,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:05:18,819 INFO L481 AbstractCegarLoop]: Abstraction has 6005 states and 8734 transitions. [2020-10-28 00:05:18,819 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:05:18,819 INFO L276 IsEmpty]: Start isEmpty. Operand 6005 states and 8734 transitions. [2020-10-28 00:05:18,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-28 00:05:18,823 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:05:18,824 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] [2020-10-28 00:05:18,824 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 00:05:18,824 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:05:18,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:05:18,825 INFO L82 PathProgramCache]: Analyzing trace with hash 1597991595, now seen corresponding path program 1 times [2020-10-28 00:05:18,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:05:18,825 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [837748141] [2020-10-28 00:05:18,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:05:18,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:05:18,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:05:18,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:05:18,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:05:19,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:05:19,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:05:20,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:05:20,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:05:20,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:05:20,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:05:20,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:05:20,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:05:23,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:05:23,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:05:23,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:05:23,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:05:23,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:05:23,861 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:05:23,861 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-28 00:05:23,862 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-28 00:05:23,862 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-28 00:05:23,862 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:05:23,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:05:23,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-28 00:05:23,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-28 00:05:23,863 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:05:24,506 WARN L193 SmtUtils]: Spent 593.00 ms on a formula simplification that was a NOOP. DAG size: 292 [2020-10-28 00:05:24,507 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:05:24,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:05:24,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:05:24,522 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:05:24,522 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:05:24,522 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:05:24,523 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 00:05:24,523 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:05:24,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:05:24,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:05:24,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:05:24,523 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:05:24,534 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:05:24,534 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [837748141] [2020-10-28 00:05:24,534 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:05:24,535 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:05:24,535 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421006451] [2020-10-28 00:05:24,535 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:05:24,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:05:24,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:05:24,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:05:24,536 INFO L87 Difference]: Start difference. First operand 6005 states and 8734 transitions. Second operand 4 states. [2020-10-28 00:05:25,283 WARN L193 SmtUtils]: Spent 695.00 ms on a formula simplification that was a NOOP. DAG size: 296 [2020-10-28 00:05:27,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:05:27,723 INFO L93 Difference]: Finished difference Result 15474 states and 22729 transitions. [2020-10-28 00:05:27,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:05:27,723 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 56 [2020-10-28 00:05:27,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:05:27,747 INFO L225 Difference]: With dead ends: 15474 [2020-10-28 00:05:27,747 INFO L226 Difference]: Without dead ends: 10358 [2020-10-28 00:05:27,758 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:05:27,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10358 states. [2020-10-28 00:05:28,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10358 to 9699. [2020-10-28 00:05:28,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9699 states. [2020-10-28 00:05:28,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9699 states to 9699 states and 13995 transitions. [2020-10-28 00:05:28,509 INFO L78 Accepts]: Start accepts. Automaton has 9699 states and 13995 transitions. Word has length 56 [2020-10-28 00:05:28,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:05:28,510 INFO L481 AbstractCegarLoop]: Abstraction has 9699 states and 13995 transitions. [2020-10-28 00:05:28,510 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:05:28,510 INFO L276 IsEmpty]: Start isEmpty. Operand 9699 states and 13995 transitions. [2020-10-28 00:05:28,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-28 00:05:28,516 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:05:28,516 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] [2020-10-28 00:05:28,516 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 00:05:28,516 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:05:28,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:05:28,517 INFO L82 PathProgramCache]: Analyzing trace with hash -1596049997, now seen corresponding path program 1 times [2020-10-28 00:05:28,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:05:28,517 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [166195896] [2020-10-28 00:05:28,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:05:28,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:05:28,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:05:28,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:05:28,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:05:28,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:05:28,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:05:29,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:05:29,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:05:29,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:05:29,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:05:29,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:05:29,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:05:29,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:05:30,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:05:30,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:05:30,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:05:32,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:05:32,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:05:32,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:05:33,555 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:05:33,555 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-28 00:05:33,555 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 18 [2020-10-28 00:05:33,555 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-28 00:05:33,555 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:05:33,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 00:05:33,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-28 00:05:33,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-28 00:05:33,556 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:05:34,364 WARN L193 SmtUtils]: Spent 597.00 ms on a formula simplification that was a NOOP. DAG size: 292 [2020-10-28 00:05:34,366 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:05:34,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:05:34,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:05:34,385 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:05:34,385 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:05:34,385 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:05:34,385 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-28 00:05:34,385 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:05:34,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:05:34,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:05:34,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:05:34,385 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:05:34,402 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:05:34,402 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [166195896] [2020-10-28 00:05:34,402 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:05:34,403 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-28 00:05:34,403 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471220493] [2020-10-28 00:05:34,403 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 00:05:34,403 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:05:34,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 00:05:34,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-28 00:05:34,404 INFO L87 Difference]: Start difference. First operand 9699 states and 13995 transitions. Second operand 9 states. [2020-10-28 00:05:35,317 WARN L193 SmtUtils]: Spent 772.00 ms on a formula simplification that was a NOOP. DAG size: 325 [2020-10-28 00:05:37,819 WARN L193 SmtUtils]: Spent 659.00 ms on a formula simplification that was a NOOP. DAG size: 295 [2020-10-28 00:05:40,525 WARN L193 SmtUtils]: Spent 693.00 ms on a formula simplification that was a NOOP. DAG size: 294 [2020-10-28 00:05:42,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:05:42,793 INFO L93 Difference]: Finished difference Result 40926 states and 59500 transitions. [2020-10-28 00:05:42,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-28 00:05:42,794 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 56 [2020-10-28 00:05:42,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:05:42,857 INFO L225 Difference]: With dead ends: 40926 [2020-10-28 00:05:42,857 INFO L226 Difference]: Without dead ends: 33807 [2020-10-28 00:05:42,879 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=95, Invalid=325, Unknown=0, NotChecked=0, Total=420 [2020-10-28 00:05:42,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33807 states. [2020-10-28 00:05:44,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33807 to 9673. [2020-10-28 00:05:44,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9673 states. [2020-10-28 00:05:44,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9673 states to 9673 states and 13953 transitions. [2020-10-28 00:05:44,028 INFO L78 Accepts]: Start accepts. Automaton has 9673 states and 13953 transitions. Word has length 56 [2020-10-28 00:05:44,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:05:44,029 INFO L481 AbstractCegarLoop]: Abstraction has 9673 states and 13953 transitions. [2020-10-28 00:05:44,029 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 00:05:44,029 INFO L276 IsEmpty]: Start isEmpty. Operand 9673 states and 13953 transitions. [2020-10-28 00:05:44,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-28 00:05:44,034 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:05:44,034 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:05:44,035 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 00:05:44,035 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:05:44,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:05:44,035 INFO L82 PathProgramCache]: Analyzing trace with hash 1876536965, now seen corresponding path program 1 times [2020-10-28 00:05:44,036 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:05:44,036 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [817829347] [2020-10-28 00:05:44,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:05:44,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:05:44,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:05:44,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:05:44,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:05:44,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:05:45,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:05:45,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:05:46,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:05:46,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:05:46,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:05:46,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:05:47,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:05:47,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:05:48,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:05:49,069 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:05:49,070 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-28 00:05:49,070 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-28 00:05:49,070 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-28 00:05:49,070 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:05:49,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 00:05:49,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-28 00:05:49,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-28 00:05:49,070 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:05:49,836 WARN L193 SmtUtils]: Spent 611.00 ms on a formula simplification that was a NOOP. DAG size: 292 [2020-10-28 00:05:49,838 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:05:49,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:05:49,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:05:49,860 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:05:49,860 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:05:49,861 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:05:49,861 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-28 00:05:49,861 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:05:49,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:05:49,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:05:49,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:05:49,861 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:05:49,886 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:05:49,886 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [817829347] [2020-10-28 00:05:49,886 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:05:49,887 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-28 00:05:49,887 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824830964] [2020-10-28 00:05:49,887 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 00:05:49,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:05:49,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 00:05:49,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-10-28 00:05:49,888 INFO L87 Difference]: Start difference. First operand 9673 states and 13953 transitions. Second operand 10 states. [2020-10-28 00:05:50,635 WARN L193 SmtUtils]: Spent 672.00 ms on a formula simplification that was a NOOP. DAG size: 293 [2020-10-28 00:05:53,080 WARN L193 SmtUtils]: Spent 642.00 ms on a formula simplification that was a NOOP. DAG size: 295 [2020-10-28 00:05:56,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:05:56,849 INFO L93 Difference]: Finished difference Result 28740 states and 41798 transitions. [2020-10-28 00:05:56,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-28 00:05:56,850 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 57 [2020-10-28 00:05:56,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:05:56,899 INFO L225 Difference]: With dead ends: 28740 [2020-10-28 00:05:56,899 INFO L226 Difference]: Without dead ends: 27252 [2020-10-28 00:05:56,909 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2020-10-28 00:05:56,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27252 states. [2020-10-28 00:05:57,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27252 to 9802. [2020-10-28 00:05:57,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9802 states. [2020-10-28 00:05:57,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9802 states to 9802 states and 14138 transitions. [2020-10-28 00:05:57,979 INFO L78 Accepts]: Start accepts. Automaton has 9802 states and 14138 transitions. Word has length 57 [2020-10-28 00:05:57,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:05:57,980 INFO L481 AbstractCegarLoop]: Abstraction has 9802 states and 14138 transitions. [2020-10-28 00:05:57,980 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 00:05:57,980 INFO L276 IsEmpty]: Start isEmpty. Operand 9802 states and 14138 transitions. [2020-10-28 00:05:57,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-28 00:05:57,985 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:05:57,985 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:05:57,985 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 00:05:57,985 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:05:57,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:05:57,986 INFO L82 PathProgramCache]: Analyzing trace with hash -734571152, now seen corresponding path program 1 times [2020-10-28 00:05:57,986 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:05:57,986 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [469674004] [2020-10-28 00:05:57,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:05:58,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:05:58,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:05:58,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:05:58,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:05:58,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:05:58,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:05:59,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:05:59,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:05:59,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:05:59,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:06:00,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:06:00,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:06:01,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:06:01,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:06:01,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:06:01,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:06:02,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:06:02,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:06:02,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:06:02,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:06:03,017 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:06:03,017 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-28 00:06:03,018 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 19 [2020-10-28 00:06:03,018 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-28 00:06:03,018 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:06:03,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 00:06:03,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 00:06:03,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-28 00:06:03,018 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:06:03,988 WARN L193 SmtUtils]: Spent 665.00 ms on a formula simplification that was a NOOP. DAG size: 292 [2020-10-28 00:06:03,990 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:06:03,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:06:03,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:06:04,011 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:06:04,011 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:06:04,011 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:06:04,011 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-28 00:06:04,012 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:06:04,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:06:04,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:06:04,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:06:04,012 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:06:04,028 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:06:04,029 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [469674004] [2020-10-28 00:06:04,029 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:06:04,029 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-10-28 00:06:04,029 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363307074] [2020-10-28 00:06:04,029 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 00:06:04,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:06:04,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 00:06:04,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2020-10-28 00:06:04,031 INFO L87 Difference]: Start difference. First operand 9802 states and 14138 transitions. Second operand 11 states. [2020-10-28 00:06:04,236 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 35 [2020-10-28 00:06:05,910 WARN L193 SmtUtils]: Spent 1.54 s on a formula simplification. DAG size of input: 316 DAG size of output: 314 [2020-10-28 00:06:08,670 WARN L193 SmtUtils]: Spent 609.00 ms on a formula simplification that was a NOOP. DAG size: 293 [2020-10-28 00:06:13,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:06:13,603 INFO L93 Difference]: Finished difference Result 30377 states and 44339 transitions. [2020-10-28 00:06:13,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-28 00:06:13,604 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 57 [2020-10-28 00:06:13,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:06:13,651 INFO L225 Difference]: With dead ends: 30377 [2020-10-28 00:06:13,652 INFO L226 Difference]: Without dead ends: 28229 [2020-10-28 00:06:13,664 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=130, Invalid=470, Unknown=0, NotChecked=0, Total=600 [2020-10-28 00:06:13,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28229 states. [2020-10-28 00:06:15,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28229 to 10907. [2020-10-28 00:06:15,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10907 states. [2020-10-28 00:06:15,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10907 states to 10907 states and 15781 transitions. [2020-10-28 00:06:15,102 INFO L78 Accepts]: Start accepts. Automaton has 10907 states and 15781 transitions. Word has length 57 [2020-10-28 00:06:15,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:06:15,103 INFO L481 AbstractCegarLoop]: Abstraction has 10907 states and 15781 transitions. [2020-10-28 00:06:15,103 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 00:06:15,103 INFO L276 IsEmpty]: Start isEmpty. Operand 10907 states and 15781 transitions. [2020-10-28 00:06:15,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-28 00:06:15,107 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:06:15,107 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:06:15,107 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-28 00:06:15,107 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:06:15,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:06:15,108 INFO L82 PathProgramCache]: Analyzing trace with hash -1317504627, now seen corresponding path program 1 times [2020-10-28 00:06:15,108 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:06:15,108 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1167639660] [2020-10-28 00:06:15,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:06:15,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:06:15,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:06:15,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:06:15,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:06:15,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:06:15,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:06:15,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:06:15,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:06:16,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:06:16,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:06:16,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:06:17,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:06:17,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:06:17,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:06:17,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:06:17,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:06:17,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:06:18,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:06:18,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:06:18,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:06:18,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:06:20,215 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:06:20,215 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-28 00:06:20,215 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 20 [2020-10-28 00:06:20,215 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5077 [2020-10-28 00:06:20,215 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:06:20,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 00:06:20,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-28 00:06:20,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-28 00:06:20,216 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:06:21,008 WARN L193 SmtUtils]: Spent 646.00 ms on a formula simplification that was a NOOP. DAG size: 292 [2020-10-28 00:06:21,009 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:06:21,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:06:21,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:06:21,034 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:06:21,034 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:06:21,034 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:06:21,034 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-28 00:06:21,035 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:06:21,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:06:21,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:06:21,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:06:21,035 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:06:21,056 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:06:21,056 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1167639660] [2020-10-28 00:06:21,058 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:06:21,058 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-28 00:06:21,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494540550] [2020-10-28 00:06:21,059 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 00:06:21,059 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:06:21,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 00:06:21,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-10-28 00:06:21,060 INFO L87 Difference]: Start difference. First operand 10907 states and 15781 transitions. Second operand 9 states. [2020-10-28 00:06:21,827 WARN L193 SmtUtils]: Spent 692.00 ms on a formula simplification that was a NOOP. DAG size: 296 [2020-10-28 00:06:24,209 WARN L193 SmtUtils]: Spent 692.00 ms on a formula simplification that was a NOOP. DAG size: 294 [2020-10-28 00:06:26,768 WARN L193 SmtUtils]: Spent 649.00 ms on a formula simplification that was a NOOP. DAG size: 293 [2020-10-28 00:06:31,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:06:31,214 INFO L93 Difference]: Finished difference Result 52974 states and 76769 transitions. [2020-10-28 00:06:31,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-28 00:06:31,214 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 57 [2020-10-28 00:06:31,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:06:31,269 INFO L225 Difference]: With dead ends: 52974 [2020-10-28 00:06:31,269 INFO L226 Difference]: Without dead ends: 44932 [2020-10-28 00:06:31,290 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2020-10-28 00:06:31,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44932 states. [2020-10-28 00:06:32,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44932 to 10688. [2020-10-28 00:06:32,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10688 states. [2020-10-28 00:06:32,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10688 states to 10688 states and 15479 transitions. [2020-10-28 00:06:32,861 INFO L78 Accepts]: Start accepts. Automaton has 10688 states and 15479 transitions. Word has length 57 [2020-10-28 00:06:32,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:06:32,862 INFO L481 AbstractCegarLoop]: Abstraction has 10688 states and 15479 transitions. [2020-10-28 00:06:32,862 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 00:06:32,862 INFO L276 IsEmpty]: Start isEmpty. Operand 10688 states and 15479 transitions. [2020-10-28 00:06:32,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-28 00:06:32,864 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:06:32,865 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:06:32,865 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-28 00:06:32,865 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:06:32,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:06:32,865 INFO L82 PathProgramCache]: Analyzing trace with hash -120214364, now seen corresponding path program 1 times [2020-10-28 00:06:32,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:06:32,865 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1789985986] [2020-10-28 00:06:32,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:06:32,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:06:32,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:06:32,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:06:32,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:06:33,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:06:33,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:06:33,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:06:33,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:06:33,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:06:33,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:06:33,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:06:33,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:06:35,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:06:35,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:06:36,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:06:36,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:06:36,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:06:36,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:06:36,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:06:36,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:06:37,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:06:37,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:06:37,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:06:37,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:06:37,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:06:37,904 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:06:37,904 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-28 00:06:37,904 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 24 [2020-10-28 00:06:37,905 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-28 00:06:37,905 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:06:37,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 00:06:37,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-28 00:06:37,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-28 00:06:37,905 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:06:38,774 WARN L193 SmtUtils]: Spent 676.00 ms on a formula simplification that was a NOOP. DAG size: 292 [2020-10-28 00:06:38,777 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:06:38,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:06:38,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:06:38,792 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:06:38,793 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:06:38,793 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:06:38,793 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 00:06:38,793 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:06:38,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:06:38,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:06:38,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:06:38,793 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:06:38,809 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:06:38,809 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1789985986] [2020-10-28 00:06:38,809 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:06:38,809 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-28 00:06:38,809 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337778819] [2020-10-28 00:06:38,810 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 00:06:38,810 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:06:38,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 00:06:38,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-10-28 00:06:38,811 INFO L87 Difference]: Start difference. First operand 10688 states and 15479 transitions. Second operand 9 states. [2020-10-28 00:06:39,553 WARN L193 SmtUtils]: Spent 682.00 ms on a formula simplification that was a NOOP. DAG size: 294 [2020-10-28 00:06:42,372 WARN L193 SmtUtils]: Spent 642.00 ms on a formula simplification that was a NOOP. DAG size: 297 [2020-10-28 00:06:44,971 WARN L193 SmtUtils]: Spent 636.00 ms on a formula simplification that was a NOOP. DAG size: 293 [2020-10-28 00:06:49,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:06:49,351 INFO L93 Difference]: Finished difference Result 36187 states and 52336 transitions. [2020-10-28 00:06:49,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-28 00:06:49,352 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 57 [2020-10-28 00:06:49,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:06:49,394 INFO L225 Difference]: With dead ends: 36187 [2020-10-28 00:06:49,394 INFO L226 Difference]: Without dead ends: 36181 [2020-10-28 00:06:49,403 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=99, Invalid=363, Unknown=0, NotChecked=0, Total=462 [2020-10-28 00:06:49,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36181 states. [2020-10-28 00:06:50,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36181 to 10688. [2020-10-28 00:06:50,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10688 states. [2020-10-28 00:06:50,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10688 states to 10688 states and 15478 transitions. [2020-10-28 00:06:50,979 INFO L78 Accepts]: Start accepts. Automaton has 10688 states and 15478 transitions. Word has length 57 [2020-10-28 00:06:50,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:06:50,980 INFO L481 AbstractCegarLoop]: Abstraction has 10688 states and 15478 transitions. [2020-10-28 00:06:50,980 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 00:06:50,980 INFO L276 IsEmpty]: Start isEmpty. Operand 10688 states and 15478 transitions. [2020-10-28 00:06:50,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-28 00:06:50,983 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:06:50,983 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:06:50,983 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-28 00:06:50,983 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:06:50,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:06:50,984 INFO L82 PathProgramCache]: Analyzing trace with hash -782199888, now seen corresponding path program 1 times [2020-10-28 00:06:50,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:06:50,985 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1749101249] [2020-10-28 00:06:50,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:06:51,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:06:51,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:06:51,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:06:51,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:06:51,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:06:51,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:06:51,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:06:51,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:06:51,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:06:52,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:06:52,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:06:54,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:06:54,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:06:55,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:06:55,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:06:55,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:06:55,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:06:55,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:06:56,013 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:06:56,013 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-28 00:06:56,013 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 17 [2020-10-28 00:06:56,013 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-28 00:06:56,013 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:06:56,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:06:56,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 38 [2020-10-28 00:06:56,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-28 00:06:56,014 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:06:56,721 WARN L193 SmtUtils]: Spent 668.00 ms on a formula simplification that was a NOOP. DAG size: 292 [2020-10-28 00:06:56,722 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:06:56,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:06:56,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:06:56,737 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:06:56,738 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:06:56,738 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:06:56,738 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 00:06:56,738 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:06:56,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:06:56,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:06:56,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:06:56,738 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:06:56,751 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:06:56,751 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1749101249] [2020-10-28 00:06:56,752 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:06:56,752 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:06:56,752 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340056806] [2020-10-28 00:06:56,752 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:06:56,752 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:06:56,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:06:56,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:06:56,753 INFO L87 Difference]: Start difference. First operand 10688 states and 15478 transitions. Second operand 4 states. [2020-10-28 00:06:58,868 WARN L193 SmtUtils]: Spent 637.00 ms on a formula simplification that was a NOOP. DAG size: 297 [2020-10-28 00:07:00,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:07:00,615 INFO L93 Difference]: Finished difference Result 14162 states and 20511 transitions. [2020-10-28 00:07:00,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:07:00,616 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 58 [2020-10-28 00:07:00,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:07:00,628 INFO L225 Difference]: With dead ends: 14162 [2020-10-28 00:07:00,628 INFO L226 Difference]: Without dead ends: 10487 [2020-10-28 00:07:00,639 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:07:00,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10487 states. [2020-10-28 00:07:01,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10487 to 8173. [2020-10-28 00:07:01,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8173 states. [2020-10-28 00:07:01,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8173 states to 8173 states and 11604 transitions. [2020-10-28 00:07:01,825 INFO L78 Accepts]: Start accepts. Automaton has 8173 states and 11604 transitions. Word has length 58 [2020-10-28 00:07:01,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:07:01,825 INFO L481 AbstractCegarLoop]: Abstraction has 8173 states and 11604 transitions. [2020-10-28 00:07:01,825 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:07:01,825 INFO L276 IsEmpty]: Start isEmpty. Operand 8173 states and 11604 transitions. [2020-10-28 00:07:01,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-28 00:07:01,828 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:07:01,828 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:07:01,828 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-28 00:07:01,828 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:07:01,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:07:01,828 INFO L82 PathProgramCache]: Analyzing trace with hash -1134099135, now seen corresponding path program 1 times [2020-10-28 00:07:01,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:07:01,829 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1698168096] [2020-10-28 00:07:01,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:07:01,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:07:01,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:01,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:01,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:01,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:02,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:02,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:02,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:02,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:02,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:04,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:04,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:04,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:04,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:04,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:04,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:05,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:05,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:06,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:06,852 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:07:06,853 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-28 00:07:06,853 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 18 [2020-10-28 00:07:06,853 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-28 00:07:06,853 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:07:06,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:07:06,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-28 00:07:06,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-28 00:07:06,853 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:07:07,559 WARN L193 SmtUtils]: Spent 665.00 ms on a formula simplification that was a NOOP. DAG size: 292 [2020-10-28 00:07:07,560 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:07:07,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:07:07,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:07,579 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:07:07,579 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:07:07,579 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:07:07,579 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-28 00:07:07,579 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:07:07,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:07:07,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:07:07,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:07:07,579 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:07:07,591 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:07:07,592 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1698168096] [2020-10-28 00:07:07,592 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:07:07,592 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:07:07,592 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102936704] [2020-10-28 00:07:07,592 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:07:07,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:07:07,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:07:07,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:07:07,593 INFO L87 Difference]: Start difference. First operand 8173 states and 11604 transitions. Second operand 4 states. [2020-10-28 00:07:09,672 WARN L193 SmtUtils]: Spent 698.00 ms on a formula simplification that was a NOOP. DAG size: 297 [2020-10-28 00:07:11,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:07:11,336 INFO L93 Difference]: Finished difference Result 11093 states and 15732 transitions. [2020-10-28 00:07:11,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:07:11,336 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 58 [2020-10-28 00:07:11,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:07:11,344 INFO L225 Difference]: With dead ends: 11093 [2020-10-28 00:07:11,345 INFO L226 Difference]: Without dead ends: 7966 [2020-10-28 00:07:11,349 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:07:11,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7966 states. [2020-10-28 00:07:12,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7966 to 6470. [2020-10-28 00:07:12,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6470 states. [2020-10-28 00:07:12,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6470 states to 6470 states and 8993 transitions. [2020-10-28 00:07:12,372 INFO L78 Accepts]: Start accepts. Automaton has 6470 states and 8993 transitions. Word has length 58 [2020-10-28 00:07:12,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:07:12,372 INFO L481 AbstractCegarLoop]: Abstraction has 6470 states and 8993 transitions. [2020-10-28 00:07:12,372 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:07:12,372 INFO L276 IsEmpty]: Start isEmpty. Operand 6470 states and 8993 transitions. [2020-10-28 00:07:12,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-28 00:07:12,376 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:07:12,376 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:07:12,376 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-28 00:07:12,376 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:07:12,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:07:12,376 INFO L82 PathProgramCache]: Analyzing trace with hash -1783028029, now seen corresponding path program 1 times [2020-10-28 00:07:12,376 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:07:12,377 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1230971792] [2020-10-28 00:07:12,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:07:12,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:07:12,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:12,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:12,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:12,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:12,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:12,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:13,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:13,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:13,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:13,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:14,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:15,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:15,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:16,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:16,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:17,415 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:07:17,415 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-28 00:07:17,415 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-28 00:07:17,415 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-28 00:07:17,415 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:07:17,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 00:07:17,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 00:07:17,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-28 00:07:17,416 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:07:18,142 WARN L193 SmtUtils]: Spent 669.00 ms on a formula simplification that was a NOOP. DAG size: 292 [2020-10-28 00:07:18,144 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:07:18,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:07:18,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:18,160 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:07:18,160 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:07:18,160 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:07:18,160 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 00:07:18,160 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:07:18,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:07:18,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:07:18,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:07:18,161 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:07:18,173 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:07:18,173 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1230971792] [2020-10-28 00:07:18,174 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:07:18,174 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 00:07:18,174 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385510198] [2020-10-28 00:07:18,174 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 00:07:18,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:07:18,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 00:07:18,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 00:07:18,175 INFO L87 Difference]: Start difference. First operand 6470 states and 8993 transitions. Second operand 6 states. [2020-10-28 00:07:18,921 WARN L193 SmtUtils]: Spent 687.00 ms on a formula simplification that was a NOOP. DAG size: 293 [2020-10-28 00:07:21,739 WARN L193 SmtUtils]: Spent 683.00 ms on a formula simplification that was a NOOP. DAG size: 293 [2020-10-28 00:07:22,737 WARN L193 SmtUtils]: Spent 662.00 ms on a formula simplification that was a NOOP. DAG size: 294