/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.8.1.ufo.BOUNDED-16.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 00:00:44,086 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 00:00:44,089 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 00:00:44,138 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 00:00:44,139 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 00:00:44,145 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 00:00:44,146 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 00:00:44,151 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 00:00:44,154 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 00:00:44,160 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 00:00:44,161 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 00:00:44,162 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 00:00:44,163 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 00:00:44,167 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 00:00:44,170 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 00:00:44,173 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 00:00:44,174 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 00:00:44,178 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 00:00:44,185 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 00:00:44,201 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 00:00:44,203 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 00:00:44,205 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 00:00:44,206 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 00:00:44,208 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 00:00:44,219 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 00:00:44,219 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 00:00:44,219 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 00:00:44,220 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 00:00:44,223 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 00:00:44,224 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 00:00:44,225 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 00:00:44,225 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 00:00:44,227 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 00:00:44,228 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 00:00:44,229 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 00:00:44,230 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 00:00:44,230 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 00:00:44,231 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 00:00:44,231 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 00:00:44,232 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 00:00:44,232 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 00:00:44,240 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 00:00:44,290 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 00:00:44,290 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 00:00:44,292 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 00:00:44,292 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 00:00:44,292 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 00:00:44,293 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 00:00:44,293 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 00:00:44,293 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 00:00:44,293 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 00:00:44,293 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 00:00:44,294 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 00:00:44,294 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 00:00:44,294 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 00:00:44,294 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 00:00:44,294 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 00:00:44,295 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 00:00:44,295 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 00:00:44,295 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 00:00:44,295 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 00:00:44,296 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 00:00:44,296 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 00:00:44,296 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 00:00:44,296 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 00:00:44,297 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 00:00:44,297 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 00:00:44,297 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 00:00:44,297 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 00:00:44,297 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 00:00:44,298 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 00:00:44,298 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-28 00:00:44,652 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 00:00:44,676 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 00:00:44,679 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 00:00:44,681 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 00:00:44,681 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 00:00:44,682 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.8.1.ufo.BOUNDED-16.pals.c.v+cfa-reducer.c [2020-10-28 00:00:44,774 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ab8d99176/63e6e1c6189d4ac19a560cff7e735525/FLAG04ea6e0ff [2020-10-28 00:00:45,482 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 00:00:45,482 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.8.1.ufo.BOUNDED-16.pals.c.v+cfa-reducer.c [2020-10-28 00:00:45,500 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ab8d99176/63e6e1c6189d4ac19a560cff7e735525/FLAG04ea6e0ff [2020-10-28 00:00:45,745 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ab8d99176/63e6e1c6189d4ac19a560cff7e735525 [2020-10-28 00:00:45,750 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 00:00:45,758 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 00:00:45,763 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 00:00:45,763 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 00:00:45,767 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 00:00:45,767 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 12:00:45" (1/1) ... [2020-10-28 00:00:45,772 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7f144bae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:00:45, skipping insertion in model container [2020-10-28 00:00:45,773 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 12:00:45" (1/1) ... [2020-10-28 00:00:45,781 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 00:00:45,852 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 00:00:46,215 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 00:00:46,259 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 00:00:46,397 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 00:00:46,424 INFO L208 MainTranslator]: Completed translation [2020-10-28 00:00:46,425 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:00:46 WrapperNode [2020-10-28 00:00:46,425 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 00:00:46,426 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 00:00:46,426 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 00:00:46,426 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 00:00:46,440 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:00:46" (1/1) ... [2020-10-28 00:00:46,440 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:00:46" (1/1) ... [2020-10-28 00:00:46,454 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:00:46" (1/1) ... [2020-10-28 00:00:46,454 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:00:46" (1/1) ... [2020-10-28 00:00:46,474 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:00:46" (1/1) ... [2020-10-28 00:00:46,486 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:00:46" (1/1) ... [2020-10-28 00:00:46,490 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:00:46" (1/1) ... [2020-10-28 00:00:46,496 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 00:00:46,497 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 00:00:46,497 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 00:00:46,498 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 00:00:46,498 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:00:46" (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 00:00:46,584 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 00:00:46,585 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 00:00:46,585 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 00:00:46,585 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-28 00:00:46,585 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 00:00:46,585 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 00:00:46,586 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 00:00:46,586 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 00:00:46,586 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 00:00:46,586 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-28 00:00:46,586 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-28 00:00:46,586 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-28 00:00:46,587 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-28 00:00:46,587 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-28 00:00:46,587 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-28 00:00:46,587 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-28 00:00:46,587 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-28 00:00:46,588 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-28 00:00:46,588 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-28 00:00:46,588 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-10-28 00:00:46,588 INFO L130 BoogieDeclarations]: Found specification of procedure node6 [2020-10-28 00:00:46,588 INFO L130 BoogieDeclarations]: Found specification of procedure node7 [2020-10-28 00:00:46,588 INFO L130 BoogieDeclarations]: Found specification of procedure node8 [2020-10-28 00:00:46,589 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-28 00:00:46,589 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-28 00:00:46,589 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 00:00:46,589 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 00:00:46,589 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 00:00:46,589 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 00:00:46,590 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 00:00:46,590 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 00:00:46,590 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 00:00:47,892 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 00:00:47,892 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-28 00:00:47,895 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 12:00:47 BoogieIcfgContainer [2020-10-28 00:00:47,895 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 00:00:47,897 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 00:00:47,897 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 00:00:47,901 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 00:00:47,901 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 12:00:45" (1/3) ... [2020-10-28 00:00:47,902 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34e848fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 12:00:47, skipping insertion in model container [2020-10-28 00:00:47,902 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:00:46" (2/3) ... [2020-10-28 00:00:47,902 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34e848fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 12:00:47, skipping insertion in model container [2020-10-28 00:00:47,903 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 12:00:47" (3/3) ... [2020-10-28 00:00:47,904 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.8.1.ufo.BOUNDED-16.pals.c.v+cfa-reducer.c [2020-10-28 00:00:47,917 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 00:00:47,923 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 00:00:47,936 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 00:00:47,966 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 00:00:47,966 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 00:00:47,966 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 00:00:47,966 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 00:00:47,966 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 00:00:47,966 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 00:00:47,967 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 00:00:47,967 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 00:00:47,989 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states. [2020-10-28 00:00:48,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-10-28 00:00:48,002 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:00:48,003 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:00:48,003 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:00:48,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:00:48,010 INFO L82 PathProgramCache]: Analyzing trace with hash -1569647866, now seen corresponding path program 1 times [2020-10-28 00:00:48,020 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:00:48,020 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1417606759] [2020-10-28 00:00:48,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:00:48,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:00:48,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:00:48,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:00:48,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:00:49,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:00:49,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:00:50,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:00:50,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:00:53,469 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:00:53,469 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 114 [2020-10-28 00:00:53,469 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 00:00:53,470 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5035 [2020-10-28 00:00:53,472 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:00:53,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:00:53,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 40 [2020-10-28 00:00:53,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-28 00:00:53,473 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 00:00:54,405 WARN L193 SmtUtils]: Spent 721.00 ms on a formula simplification that was a NOOP. DAG size: 223 [2020-10-28 00:00:54,411 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:00:54,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:00:54,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:00:54,450 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:00:54,451 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:00:54,451 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:00:54,451 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-28 00:00:54,452 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:00:54,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:00:54,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:00:54,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:00:54,453 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:00:54,512 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 00:00:54,513 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1417606759] [2020-10-28 00:00:54,516 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:00:54,516 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:00:54,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744775144] [2020-10-28 00:00:54,526 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:00:54,526 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:00:54,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:00:54,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:00:54,549 INFO L87 Difference]: Start difference. First operand 166 states. Second operand 4 states. [2020-10-28 00:00:55,390 WARN L193 SmtUtils]: Spent 748.00 ms on a formula simplification that was a NOOP. DAG size: 227 [2020-10-28 00:00:56,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:00:56,559 INFO L93 Difference]: Finished difference Result 348 states and 569 transitions. [2020-10-28 00:00:56,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:00:56,561 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 106 [2020-10-28 00:00:56,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:00:56,575 INFO L225 Difference]: With dead ends: 348 [2020-10-28 00:00:56,575 INFO L226 Difference]: Without dead ends: 242 [2020-10-28 00:00:56,579 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:00:56,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2020-10-28 00:00:56,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 239. [2020-10-28 00:00:56,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 239 states. [2020-10-28 00:00:56,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 340 transitions. [2020-10-28 00:00:56,651 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 340 transitions. Word has length 106 [2020-10-28 00:00:56,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:00:56,652 INFO L481 AbstractCegarLoop]: Abstraction has 239 states and 340 transitions. [2020-10-28 00:00:56,653 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:00:56,653 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 340 transitions. [2020-10-28 00:00:56,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-10-28 00:00:56,656 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:00:56,657 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:00:56,659 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 00:00:56,659 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:00:56,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:00:56,660 INFO L82 PathProgramCache]: Analyzing trace with hash 472968336, now seen corresponding path program 1 times [2020-10-28 00:00:56,660 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:00:56,661 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1468057577] [2020-10-28 00:00:56,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:00:56,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:00:56,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:00:56,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:00:56,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:00:56,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:00:57,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:00:57,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:01:00,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:01:00,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:01:01,756 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:01:01,756 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 115 [2020-10-28 00:01:01,757 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-28 00:01:01,757 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5034 [2020-10-28 00:01:01,757 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:01:01,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:01:01,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 44 [2020-10-28 00:01:01,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-28 00:01:01,758 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:01:02,222 WARN L193 SmtUtils]: Spent 378.00 ms on a formula simplification that was a NOOP. DAG size: 223 [2020-10-28 00:01:02,223 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:01:02,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:01:02,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:01:02,255 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:01:02,256 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:01:02,256 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:01:02,256 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-28 00:01:02,256 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:01:02,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:01:02,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:01:02,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:01:02,257 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:01:02,315 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 00:01:02,316 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1468057577] [2020-10-28 00:01:02,316 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:01:02,317 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:01:02,319 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365481882] [2020-10-28 00:01:02,321 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:01:02,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:01:02,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:01:02,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:01:02,323 INFO L87 Difference]: Start difference. First operand 239 states and 340 transitions. Second operand 4 states. [2020-10-28 00:01:02,764 WARN L193 SmtUtils]: Spent 392.00 ms on a formula simplification that was a NOOP. DAG size: 227 [2020-10-28 00:01:03,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:01:03,590 INFO L93 Difference]: Finished difference Result 565 states and 858 transitions. [2020-10-28 00:01:03,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:01:03,590 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 107 [2020-10-28 00:01:03,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:01:03,602 INFO L225 Difference]: With dead ends: 565 [2020-10-28 00:01:03,603 INFO L226 Difference]: Without dead ends: 394 [2020-10-28 00:01:03,605 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:01:03,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2020-10-28 00:01:03,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 391. [2020-10-28 00:01:03,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 391 states. [2020-10-28 00:01:03,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391 states to 391 states and 582 transitions. [2020-10-28 00:01:03,676 INFO L78 Accepts]: Start accepts. Automaton has 391 states and 582 transitions. Word has length 107 [2020-10-28 00:01:03,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:01:03,677 INFO L481 AbstractCegarLoop]: Abstraction has 391 states and 582 transitions. [2020-10-28 00:01:03,677 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:01:03,677 INFO L276 IsEmpty]: Start isEmpty. Operand 391 states and 582 transitions. [2020-10-28 00:01:03,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-10-28 00:01:03,682 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:01:03,682 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:01:03,682 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 00:01:03,683 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:01:03,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:01:03,683 INFO L82 PathProgramCache]: Analyzing trace with hash -709473006, now seen corresponding path program 1 times [2020-10-28 00:01:03,683 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:01:03,684 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1058940476] [2020-10-28 00:01:03,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:01:03,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:01:03,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:01:03,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:01:03,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:01:03,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:01:04,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:01:04,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:01:06,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:01:07,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:01:08,747 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:01:08,748 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 116 [2020-10-28 00:01:08,748 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-28 00:01:08,748 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-28 00:01:08,748 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:01:08,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:01:08,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 36 [2020-10-28 00:01:08,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-28 00:01:08,749 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:01:09,207 WARN L193 SmtUtils]: Spent 360.00 ms on a formula simplification that was a NOOP. DAG size: 223 [2020-10-28 00:01:09,214 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:01:09,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:01:09,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:01:09,243 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:01:09,244 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:01:09,244 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:01:09,244 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-28 00:01:09,244 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:01:09,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:01:09,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:01:09,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:01:09,245 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:01:09,324 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 00:01:09,325 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1058940476] [2020-10-28 00:01:09,325 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:01:09,325 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:01:09,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306615073] [2020-10-28 00:01:09,326 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:01:09,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:01:09,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:01:09,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:01:09,328 INFO L87 Difference]: Start difference. First operand 391 states and 582 transitions. Second operand 4 states. [2020-10-28 00:01:09,820 WARN L193 SmtUtils]: Spent 452.00 ms on a formula simplification that was a NOOP. DAG size: 227 [2020-10-28 00:01:10,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:01:10,635 INFO L93 Difference]: Finished difference Result 1005 states and 1558 transitions. [2020-10-28 00:01:10,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:01:10,636 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 108 [2020-10-28 00:01:10,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:01:10,644 INFO L225 Difference]: With dead ends: 1005 [2020-10-28 00:01:10,645 INFO L226 Difference]: Without dead ends: 682 [2020-10-28 00:01:10,652 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:01:10,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 682 states. [2020-10-28 00:01:10,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 682 to 679. [2020-10-28 00:01:10,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 679 states. [2020-10-28 00:01:10,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 679 states to 679 states and 1038 transitions. [2020-10-28 00:01:10,705 INFO L78 Accepts]: Start accepts. Automaton has 679 states and 1038 transitions. Word has length 108 [2020-10-28 00:01:10,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:01:10,707 INFO L481 AbstractCegarLoop]: Abstraction has 679 states and 1038 transitions. [2020-10-28 00:01:10,711 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:01:10,712 INFO L276 IsEmpty]: Start isEmpty. Operand 679 states and 1038 transitions. [2020-10-28 00:01:10,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-10-28 00:01:10,719 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:01:10,719 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:01:10,719 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 00:01:10,719 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:01:10,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:01:10,723 INFO L82 PathProgramCache]: Analyzing trace with hash -1839128114, now seen corresponding path program 1 times [2020-10-28 00:01:10,724 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:01:10,724 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [412435229] [2020-10-28 00:01:10,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:01:10,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:01:10,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:01:10,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:01:10,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:01:10,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:01:11,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:01:11,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:01:15,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:01:15,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:01:15,808 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:01:15,808 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 117 [2020-10-28 00:01:15,808 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-28 00:01:15,808 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5048 [2020-10-28 00:01:15,808 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:01:15,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:01:15,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 32 [2020-10-28 00:01:15,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-28 00:01:15,809 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:01:16,256 WARN L193 SmtUtils]: Spent 320.00 ms on a formula simplification that was a NOOP. DAG size: 223 [2020-10-28 00:01:16,257 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:01:16,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:01:16,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:01:16,278 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:01:16,278 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:01:16,279 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:01:16,279 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-28 00:01:16,279 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:01:16,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:01:16,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:01:16,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:01:16,280 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:01:16,323 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:01:16,323 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [412435229] [2020-10-28 00:01:16,324 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:01:16,324 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:01:16,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242828846] [2020-10-28 00:01:16,325 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:01:16,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:01:16,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:01:16,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:01:16,328 INFO L87 Difference]: Start difference. First operand 679 states and 1038 transitions. Second operand 4 states. [2020-10-28 00:01:16,735 WARN L193 SmtUtils]: Spent 376.00 ms on a formula simplification that was a NOOP. DAG size: 227 [2020-10-28 00:01:17,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:01:17,563 INFO L93 Difference]: Finished difference Result 1837 states and 2874 transitions. [2020-10-28 00:01:17,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:01:17,563 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 109 [2020-10-28 00:01:17,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:01:17,573 INFO L225 Difference]: With dead ends: 1837 [2020-10-28 00:01:17,574 INFO L226 Difference]: Without dead ends: 1226 [2020-10-28 00:01:17,576 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:01:17,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1226 states. [2020-10-28 00:01:17,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1226 to 1223. [2020-10-28 00:01:17,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1223 states. [2020-10-28 00:01:17,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1223 states to 1223 states and 1894 transitions. [2020-10-28 00:01:17,649 INFO L78 Accepts]: Start accepts. Automaton has 1223 states and 1894 transitions. Word has length 109 [2020-10-28 00:01:17,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:01:17,649 INFO L481 AbstractCegarLoop]: Abstraction has 1223 states and 1894 transitions. [2020-10-28 00:01:17,649 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:01:17,649 INFO L276 IsEmpty]: Start isEmpty. Operand 1223 states and 1894 transitions. [2020-10-28 00:01:17,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-10-28 00:01:17,651 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:01:17,652 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:01:17,652 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 00:01:17,652 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:01:17,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:01:17,653 INFO L82 PathProgramCache]: Analyzing trace with hash 568344566, now seen corresponding path program 1 times [2020-10-28 00:01:17,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:01:17,653 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [558624735] [2020-10-28 00:01:17,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:01:17,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:01:17,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:01:17,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:01:17,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:01:17,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:01:18,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:01:20,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:01:20,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:01:20,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:01:22,704 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:01:22,704 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 118 [2020-10-28 00:01:22,704 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-28 00:01:22,704 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-28 00:01:22,705 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:01:22,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 00:01:22,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 35 [2020-10-28 00:01:22,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 73 [2020-10-28 00:01:22,705 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:01:23,152 WARN L193 SmtUtils]: Spent 344.00 ms on a formula simplification that was a NOOP. DAG size: 223 [2020-10-28 00:01:23,153 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:01:23,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:01:23,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:01:23,184 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:01:23,184 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:01:23,184 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:01:23,184 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-28 00:01:23,185 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:01:23,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:01:23,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:01:23,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:01:23,185 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:01:23,220 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 00:01:23,220 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [558624735] [2020-10-28 00:01:23,221 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:01:23,221 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-28 00:01:23,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563720126] [2020-10-28 00:01:23,221 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 00:01:23,222 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:01:23,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 00:01:23,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-28 00:01:23,222 INFO L87 Difference]: Start difference. First operand 1223 states and 1894 transitions. Second operand 7 states. [2020-10-28 00:01:23,663 WARN L193 SmtUtils]: Spent 381.00 ms on a formula simplification that was a NOOP. DAG size: 227 [2020-10-28 00:01:24,732 WARN L193 SmtUtils]: Spent 410.00 ms on a formula simplification that was a NOOP. DAG size: 229 [2020-10-28 00:01:25,176 WARN L193 SmtUtils]: Spent 407.00 ms on a formula simplification that was a NOOP. DAG size: 227 [2020-10-28 00:01:26,104 WARN L193 SmtUtils]: Spent 373.00 ms on a formula simplification that was a NOOP. DAG size: 224 [2020-10-28 00:01:26,501 WARN L193 SmtUtils]: Spent 371.00 ms on a formula simplification that was a NOOP. DAG size: 225 [2020-10-28 00:01:27,249 WARN L193 SmtUtils]: Spent 362.00 ms on a formula simplification that was a NOOP. DAG size: 226 [2020-10-28 00:01:27,668 WARN L193 SmtUtils]: Spent 392.00 ms on a formula simplification that was a NOOP. DAG size: 227 [2020-10-28 00:01:28,446 WARN L193 SmtUtils]: Spent 376.00 ms on a formula simplification that was a NOOP. DAG size: 228 [2020-10-28 00:01:28,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:01:28,613 INFO L93 Difference]: Finished difference Result 10439 states and 16454 transitions. [2020-10-28 00:01:28,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-28 00:01:28,613 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 110 [2020-10-28 00:01:28,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:01:28,662 INFO L225 Difference]: With dead ends: 10439 [2020-10-28 00:01:28,662 INFO L226 Difference]: Without dead ends: 9284 [2020-10-28 00:01:28,668 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=124, Invalid=296, Unknown=0, NotChecked=0, Total=420 [2020-10-28 00:01:28,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9284 states. [2020-10-28 00:01:28,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9284 to 3511. [2020-10-28 00:01:28,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3511 states. [2020-10-28 00:01:28,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3511 states to 3511 states and 5502 transitions. [2020-10-28 00:01:28,914 INFO L78 Accepts]: Start accepts. Automaton has 3511 states and 5502 transitions. Word has length 110 [2020-10-28 00:01:28,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:01:28,914 INFO L481 AbstractCegarLoop]: Abstraction has 3511 states and 5502 transitions. [2020-10-28 00:01:28,914 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 00:01:28,914 INFO L276 IsEmpty]: Start isEmpty. Operand 3511 states and 5502 transitions. [2020-10-28 00:01:28,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-10-28 00:01:28,916 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:01:28,916 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:01:28,916 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 00:01:28,916 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:01:28,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:01:28,917 INFO L82 PathProgramCache]: Analyzing trace with hash 1403547057, now seen corresponding path program 1 times [2020-10-28 00:01:28,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:01:28,917 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [699286447] [2020-10-28 00:01:28,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:01:28,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:01:28,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:01:29,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:01:29,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:01:29,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:01:29,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:01:31,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:01:33,968 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:01:33,968 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 118 [2020-10-28 00:01:33,968 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 00:01:33,968 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5019 [2020-10-28 00:01:33,968 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:01:33,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:01:33,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-28 00:01:33,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-28 00:01:33,969 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:01:34,555 WARN L193 SmtUtils]: Spent 527.00 ms on a formula simplification that was a NOOP. DAG size: 223 [2020-10-28 00:01:34,556 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:01:34,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:01:34,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:01:34,582 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:01:34,583 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:01:34,583 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:01:34,583 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-28 00:01:34,583 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:01:34,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:01:34,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:01:34,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:01:34,584 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:01:34,622 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 00:01:34,623 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [699286447] [2020-10-28 00:01:34,624 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:01:34,624 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:01:34,624 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462260786] [2020-10-28 00:01:34,625 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:01:34,625 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:01:34,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:01:34,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:01:34,626 INFO L87 Difference]: Start difference. First operand 3511 states and 5502 transitions. Second operand 4 states. [2020-10-28 00:01:35,038 WARN L193 SmtUtils]: Spent 375.00 ms on a formula simplification that was a NOOP. DAG size: 227 [2020-10-28 00:01:36,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:01:36,169 INFO L93 Difference]: Finished difference Result 10013 states and 15746 transitions. [2020-10-28 00:01:36,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:01:36,170 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 110 [2020-10-28 00:01:36,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:01:36,205 INFO L225 Difference]: With dead ends: 10013 [2020-10-28 00:01:36,205 INFO L226 Difference]: Without dead ends: 6570 [2020-10-28 00:01:36,215 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:01:36,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6570 states. [2020-10-28 00:01:36,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6570 to 6567. [2020-10-28 00:01:36,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6567 states. [2020-10-28 00:01:36,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6567 states to 6567 states and 10262 transitions. [2020-10-28 00:01:36,618 INFO L78 Accepts]: Start accepts. Automaton has 6567 states and 10262 transitions. Word has length 110 [2020-10-28 00:01:36,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:01:36,618 INFO L481 AbstractCegarLoop]: Abstraction has 6567 states and 10262 transitions. [2020-10-28 00:01:36,618 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:01:36,619 INFO L276 IsEmpty]: Start isEmpty. Operand 6567 states and 10262 transitions. [2020-10-28 00:01:36,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-10-28 00:01:36,620 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:01:36,620 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:01:36,620 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 00:01:36,620 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:01:36,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:01:36,621 INFO L82 PathProgramCache]: Analyzing trace with hash 1302030243, now seen corresponding path program 1 times [2020-10-28 00:01:36,622 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:01:36,622 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [760215391] [2020-10-28 00:01:36,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:01:36,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:01:36,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:01:36,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:01:36,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:01:36,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:01:37,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:01:37,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:01:41,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:01:41,666 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:01:41,666 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 119 [2020-10-28 00:01:41,666 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 00:01:41,666 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-28 00:01:41,666 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:01:41,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 00:01:41,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-10-28 00:01:41,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-28 00:01:41,667 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:01:42,119 WARN L193 SmtUtils]: Spent 361.00 ms on a formula simplification that was a NOOP. DAG size: 223 [2020-10-28 00:01:42,120 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:01:42,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:01:42,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:01:42,141 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:01:42,141 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:01:42,141 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:01:42,141 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-28 00:01:42,142 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:01:42,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:01:42,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:01:42,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:01:42,142 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:01:42,180 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 00:01:42,181 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [760215391] [2020-10-28 00:01:42,181 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:01:42,181 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-28 00:01:42,181 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764689633] [2020-10-28 00:01:42,182 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 00:01:42,182 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:01:42,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 00:01:42,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-28 00:01:42,183 INFO L87 Difference]: Start difference. First operand 6567 states and 10262 transitions. Second operand 7 states. [2020-10-28 00:01:42,629 WARN L193 SmtUtils]: Spent 386.00 ms on a formula simplification that was a NOOP. DAG size: 227 [2020-10-28 00:01:43,744 WARN L193 SmtUtils]: Spent 448.00 ms on a formula simplification that was a NOOP. DAG size: 229 [2020-10-28 00:01:44,256 WARN L193 SmtUtils]: Spent 481.00 ms on a formula simplification that was a NOOP. DAG size: 227 [2020-10-28 00:01:45,341 WARN L193 SmtUtils]: Spent 409.00 ms on a formula simplification that was a NOOP. DAG size: 224 [2020-10-28 00:01:45,770 WARN L193 SmtUtils]: Spent 406.00 ms on a formula simplification that was a NOOP. DAG size: 225 [2020-10-28 00:01:47,077 WARN L193 SmtUtils]: Spent 417.00 ms on a formula simplification that was a NOOP. DAG size: 226 [2020-10-28 00:01:47,520 WARN L193 SmtUtils]: Spent 420.00 ms on a formula simplification that was a NOOP. DAG size: 227 [2020-10-28 00:01:48,565 WARN L193 SmtUtils]: Spent 455.00 ms on a formula simplification that was a NOOP. DAG size: 228 [2020-10-28 00:01:48,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:01:48,808 INFO L93 Difference]: Finished difference Result 45548 states and 71338 transitions. [2020-10-28 00:01:48,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-28 00:01:48,809 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 111 [2020-10-28 00:01:48,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:01:48,937 INFO L225 Difference]: With dead ends: 45548 [2020-10-28 00:01:48,938 INFO L226 Difference]: Without dead ends: 41209 [2020-10-28 00:01:48,961 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=124, Invalid=296, Unknown=0, NotChecked=0, Total=420 [2020-10-28 00:01:49,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41209 states. [2020-10-28 00:01:50,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41209 to 13060. [2020-10-28 00:01:50,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13060 states. [2020-10-28 00:01:50,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13060 states to 13060 states and 20378 transitions. [2020-10-28 00:01:50,139 INFO L78 Accepts]: Start accepts. Automaton has 13060 states and 20378 transitions. Word has length 111 [2020-10-28 00:01:50,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:01:50,140 INFO L481 AbstractCegarLoop]: Abstraction has 13060 states and 20378 transitions. [2020-10-28 00:01:50,140 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 00:01:50,140 INFO L276 IsEmpty]: Start isEmpty. Operand 13060 states and 20378 transitions. [2020-10-28 00:01:50,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-10-28 00:01:50,141 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:01:50,142 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:01:50,142 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 00:01:50,142 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:01:50,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:01:50,143 INFO L82 PathProgramCache]: Analyzing trace with hash -1441416733, now seen corresponding path program 1 times [2020-10-28 00:01:50,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:01:50,144 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [747727368] [2020-10-28 00:01:50,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:01:50,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:01:50,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:01:50,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:01:50,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:01:50,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:01:51,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:01:51,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:01:51,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:01:55,178 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:01:55,178 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 119 [2020-10-28 00:01:55,178 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 00:01:55,178 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-28 00:01:55,178 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:01:55,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 00:01:55,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-10-28 00:01:55,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-28 00:01:55,179 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:01:55,647 WARN L193 SmtUtils]: Spent 393.00 ms on a formula simplification that was a NOOP. DAG size: 223 [2020-10-28 00:01:55,649 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:01:55,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:01:55,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:01:55,674 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:01:55,675 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:01:55,675 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:01:55,675 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-28 00:01:55,675 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:01:55,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:01:55,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:01:55,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:01:55,676 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:01:55,712 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 00:01:55,713 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [747727368] [2020-10-28 00:01:55,713 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:01:55,713 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-28 00:01:55,713 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327054311] [2020-10-28 00:01:55,714 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 00:01:55,714 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:01:55,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 00:01:55,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-28 00:01:55,715 INFO L87 Difference]: Start difference. First operand 13060 states and 20378 transitions. Second operand 7 states. [2020-10-28 00:01:56,176 WARN L193 SmtUtils]: Spent 394.00 ms on a formula simplification that was a NOOP. DAG size: 227 [2020-10-28 00:01:57,240 WARN L193 SmtUtils]: Spent 400.00 ms on a formula simplification that was a NOOP. DAG size: 229 [2020-10-28 00:01:57,738 WARN L193 SmtUtils]: Spent 469.00 ms on a formula simplification that was a NOOP. DAG size: 227 [2020-10-28 00:01:58,757 WARN L193 SmtUtils]: Spent 409.00 ms on a formula simplification that was a NOOP. DAG size: 224 [2020-10-28 00:01:59,188 WARN L193 SmtUtils]: Spent 402.00 ms on a formula simplification that was a NOOP. DAG size: 225 [2020-10-28 00:02:00,601 WARN L193 SmtUtils]: Spent 414.00 ms on a formula simplification that was a NOOP. DAG size: 226 [2020-10-28 00:02:01,041 WARN L193 SmtUtils]: Spent 418.00 ms on a formula simplification that was a NOOP. DAG size: 227 [2020-10-28 00:02:02,176 WARN L193 SmtUtils]: Spent 428.00 ms on a formula simplification that was a NOOP. DAG size: 228 [2020-10-28 00:02:02,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:02:02,672 INFO L93 Difference]: Finished difference Result 52039 states and 81159 transitions. [2020-10-28 00:02:02,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-28 00:02:02,673 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 111 [2020-10-28 00:02:02,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:02:02,757 INFO L225 Difference]: With dead ends: 52039 [2020-10-28 00:02:02,757 INFO L226 Difference]: Without dead ends: 43396 [2020-10-28 00:02:02,787 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=124, Invalid=296, Unknown=0, NotChecked=0, Total=420 [2020-10-28 00:02:02,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43396 states. [2020-10-28 00:02:04,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43396 to 17364. [2020-10-28 00:02:04,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17364 states. [2020-10-28 00:02:04,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17364 states to 17364 states and 27114 transitions. [2020-10-28 00:02:04,215 INFO L78 Accepts]: Start accepts. Automaton has 17364 states and 27114 transitions. Word has length 111 [2020-10-28 00:02:04,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:02:04,215 INFO L481 AbstractCegarLoop]: Abstraction has 17364 states and 27114 transitions. [2020-10-28 00:02:04,215 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 00:02:04,215 INFO L276 IsEmpty]: Start isEmpty. Operand 17364 states and 27114 transitions. [2020-10-28 00:02:04,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-10-28 00:02:04,217 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:02:04,217 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:02:04,217 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 00:02:04,218 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:02:04,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:02:04,218 INFO L82 PathProgramCache]: Analyzing trace with hash -606214242, now seen corresponding path program 1 times [2020-10-28 00:02:04,218 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:02:04,219 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1220571899] [2020-10-28 00:02:04,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:02:04,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:02:04,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:02:04,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:02:04,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:02:04,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:02:05,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:02:09,251 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:02:09,251 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 119 [2020-10-28 00:02:09,251 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 00:02:09,251 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-28 00:02:09,251 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:02:09,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:02:09,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-28 00:02:09,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-28 00:02:09,252 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:02:09,690 WARN L193 SmtUtils]: Spent 397.00 ms on a formula simplification that was a NOOP. DAG size: 223 [2020-10-28 00:02:09,691 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:02:09,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:02:09,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:02:09,714 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:02:09,714 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:02:09,714 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:02:09,714 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-28 00:02:09,714 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:02:09,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:02:09,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:02:09,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:02:09,715 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:02:09,746 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 00:02:09,746 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1220571899] [2020-10-28 00:02:09,746 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:02:09,746 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:02:09,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312489257] [2020-10-28 00:02:09,747 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:02:09,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:02:09,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:02:09,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:02:09,748 INFO L87 Difference]: Start difference. First operand 17364 states and 27114 transitions. Second operand 4 states. [2020-10-28 00:02:10,219 WARN L193 SmtUtils]: Spent 427.00 ms on a formula simplification that was a NOOP. DAG size: 227 [2020-10-28 00:02:12,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:02:12,455 INFO L93 Difference]: Finished difference Result 49833 states and 77762 transitions. [2020-10-28 00:02:12,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:02:12,455 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 111 [2020-10-28 00:02:12,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:02:12,519 INFO L225 Difference]: With dead ends: 49833 [2020-10-28 00:02:12,519 INFO L226 Difference]: Without dead ends: 32563 [2020-10-28 00:02:12,566 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:02:12,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32563 states. [2020-10-28 00:02:14,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32563 to 32560. [2020-10-28 00:02:14,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32560 states. [2020-10-28 00:02:14,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32560 states to 32560 states and 50498 transitions. [2020-10-28 00:02:14,765 INFO L78 Accepts]: Start accepts. Automaton has 32560 states and 50498 transitions. Word has length 111 [2020-10-28 00:02:14,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:02:14,765 INFO L481 AbstractCegarLoop]: Abstraction has 32560 states and 50498 transitions. [2020-10-28 00:02:14,765 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:02:14,765 INFO L276 IsEmpty]: Start isEmpty. Operand 32560 states and 50498 transitions. [2020-10-28 00:02:14,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-10-28 00:02:14,766 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:02:14,766 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:02:14,767 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 00:02:14,767 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:02:14,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:02:14,767 INFO L82 PathProgramCache]: Analyzing trace with hash 1425050819, now seen corresponding path program 1 times [2020-10-28 00:02:14,767 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:02:14,768 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1082869345] [2020-10-28 00:02:14,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:02:14,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:02:14,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:02:14,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:02:14,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:02:15,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:02:15,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:02:17,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:02:19,809 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:02:19,810 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 120 [2020-10-28 00:02:19,810 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 00:02:19,810 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-28 00:02:19,810 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:02:19,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 00:02:19,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-28 00:02:19,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 67 [2020-10-28 00:02:19,811 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:02:20,281 WARN L193 SmtUtils]: Spent 401.00 ms on a formula simplification that was a NOOP. DAG size: 223 [2020-10-28 00:02:20,282 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:02:20,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:02:20,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:02:20,298 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:02:20,299 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:02:20,299 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:02:20,299 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 00:02:20,299 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:02:20,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:02:20,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:02:20,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:02:20,300 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 00:02:20,324 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 00:02:20,324 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1082869345] [2020-10-28 00:02:20,324 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:02:20,325 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-28 00:02:20,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889922376] [2020-10-28 00:02:20,325 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 00:02:20,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:02:20,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 00:02:20,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-28 00:02:20,326 INFO L87 Difference]: Start difference. First operand 32560 states and 50498 transitions. Second operand 7 states. [2020-10-28 00:02:20,809 WARN L193 SmtUtils]: Spent 426.00 ms on a formula simplification that was a NOOP. DAG size: 227 [2020-10-28 00:02:21,884 WARN L193 SmtUtils]: Spent 436.00 ms on a formula simplification that was a NOOP. DAG size: 229 [2020-10-28 00:02:22,341 WARN L193 SmtUtils]: Spent 426.00 ms on a formula simplification that was a NOOP. DAG size: 227 [2020-10-28 00:02:23,791 WARN L193 SmtUtils]: Spent 409.00 ms on a formula simplification that was a NOOP. DAG size: 225 [2020-10-28 00:02:24,238 WARN L193 SmtUtils]: Spent 406.00 ms on a formula simplification that was a NOOP. DAG size: 224 [2020-10-28 00:02:29,242 WARN L193 SmtUtils]: Spent 418.00 ms on a formula simplification that was a NOOP. DAG size: 226 [2020-10-28 00:02:29,703 WARN L193 SmtUtils]: Spent 419.00 ms on a formula simplification that was a NOOP. DAG size: 227 [2020-10-28 00:02:33,599 WARN L193 SmtUtils]: Spent 428.00 ms on a formula simplification that was a NOOP. DAG size: 228 [2020-10-28 00:02:35,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:02:35,006 INFO L93 Difference]: Finished difference Result 194637 states and 301784 transitions. [2020-10-28 00:02:35,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-28 00:02:35,006 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 112 [2020-10-28 00:02:35,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:02:35,541 INFO L225 Difference]: With dead ends: 194637 [2020-10-28 00:02:35,542 INFO L226 Difference]: Without dead ends: 178378 [2020-10-28 00:02:35,607 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=124, Invalid=296, Unknown=0, NotChecked=0, Total=420 [2020-10-28 00:02:35,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178378 states. [2020-10-28 00:02:40,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178378 to 48629. [2020-10-28 00:02:40,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48629 states. [2020-10-28 00:02:40,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48629 states to 48629 states and 75143 transitions. [2020-10-28 00:02:40,582 INFO L78 Accepts]: Start accepts. Automaton has 48629 states and 75143 transitions. Word has length 112 [2020-10-28 00:02:40,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:02:40,583 INFO L481 AbstractCegarLoop]: Abstraction has 48629 states and 75143 transitions. [2020-10-28 00:02:40,583 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 00:02:40,583 INFO L276 IsEmpty]: Start isEmpty. Operand 48629 states and 75143 transitions. [2020-10-28 00:02:40,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-10-28 00:02:40,584 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:02:40,585 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:02:40,585 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 00:02:40,585 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:02:40,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:02:40,586 INFO L82 PathProgramCache]: Analyzing trace with hash 1532563203, now seen corresponding path program 1 times [2020-10-28 00:02:40,586 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:02:40,586 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1487523170] [2020-10-28 00:02:40,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:02:40,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:02:40,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:02:40,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:02:40,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:02:40,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:02:41,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:02:42,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:02:45,624 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:02:45,624 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 120 [2020-10-28 00:02:45,624 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 00:02:45,624 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-28 00:02:45,624 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:02:45,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 00:02:45,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-28 00:02:45,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-10-28 00:02:45,625 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:02:46,154 WARN L193 SmtUtils]: Spent 464.00 ms on a formula simplification that was a NOOP. DAG size: 223 [2020-10-28 00:02:46,155 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:02:46,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:02:46,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:02:46,170 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:02:46,171 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:02:46,171 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:02:46,171 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 00:02:46,171 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:02:46,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:02:46,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:02:46,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:02:46,172 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:02:46,193 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 00:02:46,194 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1487523170] [2020-10-28 00:02:46,194 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:02:46,194 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-28 00:02:46,194 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155879457] [2020-10-28 00:02:46,195 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 00:02:46,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:02:46,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 00:02:46,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-28 00:02:46,195 INFO L87 Difference]: Start difference. First operand 48629 states and 75143 transitions. Second operand 7 states. [2020-10-28 00:02:46,676 WARN L193 SmtUtils]: Spent 426.00 ms on a formula simplification that was a NOOP. DAG size: 227 [2020-10-28 00:02:47,740 WARN L193 SmtUtils]: Spent 442.00 ms on a formula simplification that was a NOOP. DAG size: 229 [2020-10-28 00:02:48,217 WARN L193 SmtUtils]: Spent 436.00 ms on a formula simplification that was a NOOP. DAG size: 227 [2020-10-28 00:02:49,920 WARN L193 SmtUtils]: Spent 444.00 ms on a formula simplification that was a NOOP. DAG size: 225 [2020-10-28 00:02:50,382 WARN L193 SmtUtils]: Spent 409.00 ms on a formula simplification that was a NOOP. DAG size: 224 [2020-10-28 00:02:56,283 WARN L193 SmtUtils]: Spent 421.00 ms on a formula simplification that was a NOOP. DAG size: 226 [2020-10-28 00:02:56,738 WARN L193 SmtUtils]: Spent 419.00 ms on a formula simplification that was a NOOP. DAG size: 227 [2020-10-28 00:03:00,555 WARN L193 SmtUtils]: Spent 426.00 ms on a formula simplification that was a NOOP. DAG size: 228 [2020-10-28 00:03:02,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:03:02,266 INFO L93 Difference]: Finished difference Result 193780 states and 299108 transitions. [2020-10-28 00:03:02,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-28 00:03:02,267 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 112 [2020-10-28 00:03:02,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:03:02,724 INFO L225 Difference]: With dead ends: 193780 [2020-10-28 00:03:02,724 INFO L226 Difference]: Without dead ends: 161393 [2020-10-28 00:03:02,788 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=124, Invalid=296, Unknown=0, NotChecked=0, Total=420 [2020-10-28 00:03:02,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161393 states. [2020-10-28 00:03:08,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161393 to 64752. [2020-10-28 00:03:08,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64752 states. [2020-10-28 00:03:08,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64752 states to 64752 states and 100098 transitions. [2020-10-28 00:03:08,417 INFO L78 Accepts]: Start accepts. Automaton has 64752 states and 100098 transitions. Word has length 112 [2020-10-28 00:03:08,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:03:08,418 INFO L481 AbstractCegarLoop]: Abstraction has 64752 states and 100098 transitions. [2020-10-28 00:03:08,418 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 00:03:08,418 INFO L276 IsEmpty]: Start isEmpty. Operand 64752 states and 100098 transitions. [2020-10-28 00:03:08,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-10-28 00:03:08,419 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:03:08,419 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:03:08,419 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-28 00:03:08,419 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:03:08,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:03:08,420 INFO L82 PathProgramCache]: Analyzing trace with hash -1210883773, now seen corresponding path program 1 times [2020-10-28 00:03:08,420 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:03:08,420 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [387334459] [2020-10-28 00:03:08,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:03:08,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:03:08,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:03:08,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:03:08,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:03:09,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:03:09,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:03:10,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:03:13,452 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:03:13,452 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 120 [2020-10-28 00:03:13,453 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 00:03:13,453 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-28 00:03:13,453 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:03:13,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 00:03:13,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-28 00:03:13,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 87 [2020-10-28 00:03:13,454 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:03:13,900 WARN L193 SmtUtils]: Spent 378.00 ms on a formula simplification that was a NOOP. DAG size: 223 [2020-10-28 00:03:13,901 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:03:13,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:03:13,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:03:13,915 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:03:13,916 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:03:13,916 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:03:13,916 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 00:03:13,916 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:03:13,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:03:13,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:03:13,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:03:13,917 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:03:13,941 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 00:03:13,942 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [387334459] [2020-10-28 00:03:13,942 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:03:13,942 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-28 00:03:13,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128722630] [2020-10-28 00:03:13,943 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 00:03:13,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:03:13,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 00:03:13,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-28 00:03:13,943 INFO L87 Difference]: Start difference. First operand 64752 states and 100098 transitions. Second operand 7 states. [2020-10-28 00:03:14,430 WARN L193 SmtUtils]: Spent 428.00 ms on a formula simplification that was a NOOP. DAG size: 227 [2020-10-28 00:03:15,498 WARN L193 SmtUtils]: Spent 440.00 ms on a formula simplification that was a NOOP. DAG size: 229 [2020-10-28 00:03:15,955 WARN L193 SmtUtils]: Spent 428.00 ms on a formula simplification that was a NOOP. DAG size: 227 [2020-10-28 00:03:17,712 WARN L193 SmtUtils]: Spent 404.00 ms on a formula simplification that was a NOOP. DAG size: 225 [2020-10-28 00:03:18,164 WARN L193 SmtUtils]: Spent 404.00 ms on a formula simplification that was a NOOP. DAG size: 224 [2020-10-28 00:03:25,128 WARN L193 SmtUtils]: Spent 411.00 ms on a formula simplification that was a NOOP. DAG size: 226 [2020-10-28 00:03:25,581 WARN L193 SmtUtils]: Spent 412.00 ms on a formula simplification that was a NOOP. DAG size: 227 [2020-10-28 00:03:30,552 WARN L193 SmtUtils]: Spent 402.00 ms on a formula simplification that was a NOOP. DAG size: 228 [2020-10-28 00:03:33,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:03:33,178 INFO L93 Difference]: Finished difference Result 220266 states and 339899 transitions. [2020-10-28 00:03:33,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-28 00:03:33,178 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 112 [2020-10-28 00:03:33,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:03:33,639 INFO L225 Difference]: With dead ends: 220266 [2020-10-28 00:03:33,639 INFO L226 Difference]: Without dead ends: 187879 [2020-10-28 00:03:33,692 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=124, Invalid=296, Unknown=0, NotChecked=0, Total=420 [2020-10-28 00:03:33,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187879 states. [2020-10-28 00:03:41,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187879 to 80880. [2020-10-28 00:03:41,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80880 states. [2020-10-28 00:03:41,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80880 states to 80880 states and 125058 transitions. [2020-10-28 00:03:41,659 INFO L78 Accepts]: Start accepts. Automaton has 80880 states and 125058 transitions. Word has length 112 [2020-10-28 00:03:41,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:03:41,660 INFO L481 AbstractCegarLoop]: Abstraction has 80880 states and 125058 transitions. [2020-10-28 00:03:41,660 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 00:03:41,660 INFO L276 IsEmpty]: Start isEmpty. Operand 80880 states and 125058 transitions. [2020-10-28 00:03:41,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-10-28 00:03:41,661 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:03:41,661 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:03:41,661 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-28 00:03:41,662 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:03:41,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:03:41,662 INFO L82 PathProgramCache]: Analyzing trace with hash -375681282, now seen corresponding path program 1 times [2020-10-28 00:03:41,662 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:03:41,662 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [118805303] [2020-10-28 00:03:41,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:03:41,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:03:41,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:03:41,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:03:41,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:03:42,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:03:46,068 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:03:46,068 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 120 [2020-10-28 00:03:46,068 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 00:03:46,068 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4378 [2020-10-28 00:03:46,068 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:03:46,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:03:46,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 00:03:46,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-28 00:03:46,069 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:03:46,507 WARN L193 SmtUtils]: Spent 399.00 ms on a formula simplification that was a NOOP. DAG size: 223 [2020-10-28 00:03:46,508 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:03:46,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:03:46,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:03:46,534 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:03:46,534 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:03:46,534 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:03:46,534 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-28 00:03:46,534 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:03:46,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:03:46,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:03:46,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:03:46,535 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:03:46,567 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 00:03:46,568 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [118805303] [2020-10-28 00:03:46,568 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:03:46,569 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:03:46,569 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673881131] [2020-10-28 00:03:46,570 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:03:46,570 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:03:46,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:03:46,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:03:46,572 INFO L87 Difference]: Start difference. First operand 80880 states and 125058 transitions. Second operand 4 states. [2020-10-28 00:03:47,017 WARN L193 SmtUtils]: Spent 399.00 ms on a formula simplification that was a NOOP. DAG size: 227 [2020-10-28 00:04:00,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:04:00,254 INFO L93 Difference]: Finished difference Result 232203 states and 358306 transitions. [2020-10-28 00:04:00,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:04:00,255 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 112 [2020-10-28 00:04:00,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:04:00,691 INFO L225 Difference]: With dead ends: 232203 [2020-10-28 00:04:00,691 INFO L226 Difference]: Without dead ends: 151407 [2020-10-28 00:04:00,752 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:04:00,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151407 states. [2020-10-28 00:04:14,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151407 to 151404. [2020-10-28 00:04:14,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151404 states. [2020-10-28 00:04:14,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151404 states to 151404 states and 232058 transitions. [2020-10-28 00:04:14,708 INFO L78 Accepts]: Start accepts. Automaton has 151404 states and 232058 transitions. Word has length 112 [2020-10-28 00:04:14,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:04:14,709 INFO L481 AbstractCegarLoop]: Abstraction has 151404 states and 232058 transitions. [2020-10-28 00:04:14,709 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:04:14,709 INFO L276 IsEmpty]: Start isEmpty. Operand 151404 states and 232058 transitions. [2020-10-28 00:04:14,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-10-28 00:04:14,710 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:04:14,710 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:04:14,710 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-28 00:04:14,710 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:04:14,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:04:14,711 INFO L82 PathProgramCache]: Analyzing trace with hash -1373715210, now seen corresponding path program 1 times [2020-10-28 00:04:14,711 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:04:14,711 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [47133048] [2020-10-28 00:04:14,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:04:14,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:04:14,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:04:14,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:04:14,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:04:15,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:04:16,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking...