/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=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.6 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.5.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 19:05:31,299 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 19:05:31,302 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 19:05:31,342 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 19:05:31,343 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 19:05:31,344 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 19:05:31,346 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 19:05:31,365 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 19:05:31,369 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 19:05:31,376 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 19:05:31,377 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 19:05:31,383 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 19:05:31,383 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 19:05:31,385 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 19:05:31,388 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 19:05:31,390 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 19:05:31,391 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 19:05:31,393 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 19:05:31,395 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 19:05:31,401 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 19:05:31,408 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 19:05:31,410 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 19:05:31,412 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 19:05:31,415 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 19:05:31,422 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 19:05:31,423 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 19:05:31,427 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 19:05:31,429 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 19:05:31,430 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 19:05:31,431 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 19:05:31,432 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 19:05:31,433 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 19:05:31,435 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 19:05:31,436 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 19:05:31,437 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 19:05:31,437 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 19:05:31,438 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 19:05:31,438 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 19:05:31,439 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 19:05:31,440 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 19:05:31,441 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 19:05:31,442 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 19:05:31,504 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 19:05:31,504 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 19:05:31,509 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 19:05:31,509 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 19:05:31,510 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 19:05:31,510 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 19:05:31,510 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 19:05:31,511 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 19:05:31,511 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 19:05:31,511 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 19:05:31,512 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 19:05:31,513 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 19:05:31,513 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 19:05:31,514 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 19:05:31,514 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 19:05:31,514 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 19:05:31,514 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 19:05:31,514 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 19:05:31,515 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 19:05:31,517 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 19:05:31,517 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 19:05:31,522 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 19:05:31,523 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 19:05:31,523 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 19:05:31,523 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 19:05:31,523 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 19:05:31,524 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 19:05:31,524 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 19:05:31,526 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 19:05:31,526 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 19:05:31,999 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 19:05:32,031 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 19:05:32,035 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 19:05:32,036 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 19:05:32,037 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 19:05:32,038 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.5.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-28 19:05:32,133 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/64b054fba/a91140407de948cda8826621916c27b6/FLAGe7aa67feb [2020-10-28 19:05:32,915 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 19:05:32,919 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.5.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-28 19:05:32,947 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/64b054fba/a91140407de948cda8826621916c27b6/FLAGe7aa67feb [2020-10-28 19:05:33,200 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/64b054fba/a91140407de948cda8826621916c27b6 [2020-10-28 19:05:33,205 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 19:05:33,214 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 19:05:33,218 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 19:05:33,218 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 19:05:33,222 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 19:05:33,223 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 07:05:33" (1/1) ... [2020-10-28 19:05:33,232 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7f671c38 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:05:33, skipping insertion in model container [2020-10-28 19:05:33,232 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 07:05:33" (1/1) ... [2020-10-28 19:05:33,242 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 19:05:33,311 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 19:05:33,732 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 19:05:33,761 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 19:05:33,918 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 19:05:33,957 INFO L208 MainTranslator]: Completed translation [2020-10-28 19:05:33,959 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:05:33 WrapperNode [2020-10-28 19:05:33,959 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 19:05:33,961 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 19:05:33,961 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 19:05:33,961 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 19:05:33,978 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:05:33" (1/1) ... [2020-10-28 19:05:33,980 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:05:33" (1/1) ... [2020-10-28 19:05:34,014 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:05:33" (1/1) ... [2020-10-28 19:05:34,015 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:05:33" (1/1) ... [2020-10-28 19:05:34,048 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:05:33" (1/1) ... [2020-10-28 19:05:34,068 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:05:33" (1/1) ... [2020-10-28 19:05:34,074 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:05:33" (1/1) ... [2020-10-28 19:05:34,084 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 19:05:34,086 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 19:05:34,086 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 19:05:34,086 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 19:05:34,090 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:05:33" (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 19:05:34,183 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 19:05:34,183 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 19:05:34,184 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 19:05:34,185 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-28 19:05:34,185 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 19:05:34,186 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 19:05:34,186 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 19:05:34,186 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 19:05:34,186 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 19:05:34,187 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-28 19:05:34,188 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-28 19:05:34,188 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-10-28 19:05:34,189 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-28 19:05:34,189 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-28 19:05:34,189 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-28 19:05:34,190 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-28 19:05:34,191 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-28 19:05:34,191 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-28 19:05:34,191 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-28 19:05:34,191 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-28 19:05:34,191 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-10-28 19:05:34,192 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-28 19:05:34,192 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-28 19:05:34,192 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 19:05:34,192 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 19:05:34,193 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 19:05:34,193 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 19:05:34,193 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 19:05:34,193 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 19:05:34,194 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 19:05:35,123 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 19:05:35,123 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-28 19:05:35,126 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 07:05:35 BoogieIcfgContainer [2020-10-28 19:05:35,126 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 19:05:35,128 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 19:05:35,128 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 19:05:35,132 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 19:05:35,133 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 07:05:33" (1/3) ... [2020-10-28 19:05:35,134 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33531011 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 07:05:35, skipping insertion in model container [2020-10-28 19:05:35,134 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:05:33" (2/3) ... [2020-10-28 19:05:35,134 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33531011 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 07:05:35, skipping insertion in model container [2020-10-28 19:05:35,135 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 07:05:35" (3/3) ... [2020-10-28 19:05:35,137 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.5.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-28 19:05:35,150 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 19:05:35,156 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 19:05:35,170 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 19:05:35,201 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 19:05:35,202 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 19:05:35,202 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 19:05:35,202 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 19:05:35,202 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 19:05:35,202 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 19:05:35,202 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 19:05:35,203 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 19:05:35,224 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states. [2020-10-28 19:05:35,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-28 19:05:35,234 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:05:35,235 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 19:05:35,236 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:05:35,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:05:35,243 INFO L82 PathProgramCache]: Analyzing trace with hash -2068660907, now seen corresponding path program 1 times [2020-10-28 19:05:35,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:05:35,254 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1930635272] [2020-10-28 19:05:35,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:05:35,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:05:35,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:05:35,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:05:36,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:05:36,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:05:37,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:05:40,587 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:05:40,588 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-28 19:05:40,588 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 19:05:40,588 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-28 19:05:40,592 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:05:40,592 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:05:40,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 19:05:40,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-28 19:05:40,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-28 19:05:40,593 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-28 19:05:41,102 WARN L193 SmtUtils]: Spent 366.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-28 19:05:41,105 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:05:41,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:05:41,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:05:41,139 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:05:41,140 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:05:41,140 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:05:41,140 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-28 19:05:41,140 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:05:41,141 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:05:41,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:05:41,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:05:41,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:05:41,141 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 19:05:41,168 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 19:05:41,169 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1930635272] [2020-10-28 19:05:41,171 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:05:41,172 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 19:05:41,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621242255] [2020-10-28 19:05:41,179 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 19:05:41,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:05:41,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 19:05:41,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 19:05:41,199 INFO L87 Difference]: Start difference. First operand 142 states. Second operand 4 states. [2020-10-28 19:05:41,616 WARN L193 SmtUtils]: Spent 338.00 ms on a formula simplification that was a NOOP. DAG size: 176 [2020-10-28 19:05:42,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:05:42,625 INFO L93 Difference]: Finished difference Result 326 states and 519 transitions. [2020-10-28 19:05:42,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 19:05:42,628 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 65 [2020-10-28 19:05:42,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:05:42,641 INFO L225 Difference]: With dead ends: 326 [2020-10-28 19:05:42,642 INFO L226 Difference]: Without dead ends: 215 [2020-10-28 19:05:42,646 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 19:05:42,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2020-10-28 19:05:42,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 212. [2020-10-28 19:05:42,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 212 states. [2020-10-28 19:05:42,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 314 transitions. [2020-10-28 19:05:42,720 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 314 transitions. Word has length 65 [2020-10-28 19:05:42,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:05:42,721 INFO L481 AbstractCegarLoop]: Abstraction has 212 states and 314 transitions. [2020-10-28 19:05:42,721 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 19:05:42,722 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 314 transitions. [2020-10-28 19:05:42,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-28 19:05:42,725 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:05:42,725 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] [2020-10-28 19:05:42,726 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 19:05:42,726 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:05:42,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:05:42,727 INFO L82 PathProgramCache]: Analyzing trace with hash -1643039788, now seen corresponding path program 1 times [2020-10-28 19:05:42,727 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:05:42,728 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [80050258] [2020-10-28 19:05:42,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:05:42,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:05:42,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:05:42,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:05:42,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:05:43,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:05:44,926 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:05:44,926 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-28 19:05:44,926 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 19:05:44,926 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2138 [2020-10-28 19:05:44,927 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:05:44,927 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:05:44,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 19:05:44,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-28 19:05:44,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-28 19:05:44,928 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 19:05:45,268 WARN L193 SmtUtils]: Spent 267.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-28 19:05:45,270 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:05:45,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:05:45,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:05:45,300 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:05:45,300 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:05:45,301 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:05:45,301 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-28 19:05:45,301 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:05:45,302 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:05:45,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:05:45,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:05:45,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:05:45,303 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 19:05:45,326 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 19:05:45,326 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [80050258] [2020-10-28 19:05:45,327 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:05:45,327 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 19:05:45,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85387842] [2020-10-28 19:05:45,331 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 19:05:45,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:05:45,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 19:05:45,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 19:05:45,332 INFO L87 Difference]: Start difference. First operand 212 states and 314 transitions. Second operand 4 states. [2020-10-28 19:05:45,675 WARN L193 SmtUtils]: Spent 302.00 ms on a formula simplification that was a NOOP. DAG size: 176 [2020-10-28 19:05:46,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:05:46,407 INFO L93 Difference]: Finished difference Result 526 states and 812 transitions. [2020-10-28 19:05:46,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 19:05:46,408 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 66 [2020-10-28 19:05:46,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:05:46,411 INFO L225 Difference]: With dead ends: 526 [2020-10-28 19:05:46,412 INFO L226 Difference]: Without dead ends: 353 [2020-10-28 19:05:46,414 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:05:46,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2020-10-28 19:05:46,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 350. [2020-10-28 19:05:46,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 350 states. [2020-10-28 19:05:46,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 533 transitions. [2020-10-28 19:05:46,485 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 533 transitions. Word has length 66 [2020-10-28 19:05:46,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:05:46,486 INFO L481 AbstractCegarLoop]: Abstraction has 350 states and 533 transitions. [2020-10-28 19:05:46,486 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 19:05:46,486 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 533 transitions. [2020-10-28 19:05:46,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-28 19:05:46,489 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:05:46,490 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 19:05:46,490 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 19:05:46,491 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:05:46,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:05:46,493 INFO L82 PathProgramCache]: Analyzing trace with hash -662360852, now seen corresponding path program 1 times [2020-10-28 19:05:46,494 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:05:46,497 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [434576988] [2020-10-28 19:05:46,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:05:46,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:05:46,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:05:46,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:05:46,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:05:47,582 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:05:47,583 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-28 19:05:47,583 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 19:05:47,583 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1048 [2020-10-28 19:05:47,584 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:05:47,584 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:05:47,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 19:05:47,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-28 19:05:47,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-28 19:05:47,604 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 20 [2020-10-28 19:05:47,902 WARN L193 SmtUtils]: Spent 249.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-28 19:05:47,903 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:05:47,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:05:47,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:05:47,924 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:05:47,924 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:05:47,924 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:05:47,924 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-28 19:05:47,925 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:05:47,925 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:05:47,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:05:47,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:05:47,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:05:47,926 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:05:47,945 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 19:05:47,945 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [434576988] [2020-10-28 19:05:47,946 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:05:47,946 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 19:05:47,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031463677] [2020-10-28 19:05:47,947 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 19:05:47,947 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:05:47,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 19:05:47,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 19:05:47,948 INFO L87 Difference]: Start difference. First operand 350 states and 533 transitions. Second operand 4 states. [2020-10-28 19:05:48,293 WARN L193 SmtUtils]: Spent 305.00 ms on a formula simplification that was a NOOP. DAG size: 176 [2020-10-28 19:05:49,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:05:49,298 INFO L93 Difference]: Finished difference Result 908 states and 1417 transitions. [2020-10-28 19:05:49,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 19:05:49,299 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 67 [2020-10-28 19:05:49,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:05:49,303 INFO L225 Difference]: With dead ends: 908 [2020-10-28 19:05:49,304 INFO L226 Difference]: Without dead ends: 597 [2020-10-28 19:05:49,306 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:05:49,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 597 states. [2020-10-28 19:05:49,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 597 to 594. [2020-10-28 19:05:49,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 594 states. [2020-10-28 19:05:49,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 594 states to 594 states and 917 transitions. [2020-10-28 19:05:49,384 INFO L78 Accepts]: Start accepts. Automaton has 594 states and 917 transitions. Word has length 67 [2020-10-28 19:05:49,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:05:49,385 INFO L481 AbstractCegarLoop]: Abstraction has 594 states and 917 transitions. [2020-10-28 19:05:49,385 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 19:05:49,385 INFO L276 IsEmpty]: Start isEmpty. Operand 594 states and 917 transitions. [2020-10-28 19:05:49,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-28 19:05:49,387 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:05:49,388 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 19:05:49,388 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 19:05:49,388 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:05:49,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:05:49,389 INFO L82 PathProgramCache]: Analyzing trace with hash 2061829311, now seen corresponding path program 1 times [2020-10-28 19:05:49,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:05:49,389 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1294077658] [2020-10-28 19:05:49,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:05:49,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:05:49,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:05:49,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:05:49,939 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:05:49,940 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-28 19:05:49,940 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 19:05:49,947 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 514 [2020-10-28 19:05:49,947 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:05:49,948 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:05:49,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 19:05:49,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-28 19:05:49,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-28 19:05:49,949 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 19:05:50,297 WARN L193 SmtUtils]: Spent 290.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-28 19:05:50,298 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:05:50,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:05:50,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:05:50,318 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:05:50,318 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:05:50,318 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:05:50,319 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-28 19:05:50,319 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:05:50,319 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:05:50,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:05:50,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:05:50,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:05:50,320 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:05:50,344 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 19:05:50,345 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1294077658] [2020-10-28 19:05:50,346 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:05:50,346 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 19:05:50,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092996092] [2020-10-28 19:05:50,348 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 19:05:50,348 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:05:50,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 19:05:50,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 19:05:50,350 INFO L87 Difference]: Start difference. First operand 594 states and 917 transitions. Second operand 4 states. [2020-10-28 19:05:50,648 WARN L193 SmtUtils]: Spent 254.00 ms on a formula simplification that was a NOOP. DAG size: 176 [2020-10-28 19:05:51,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:05:51,487 INFO L93 Difference]: Finished difference Result 1576 states and 2465 transitions. [2020-10-28 19:05:51,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 19:05:51,488 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 68 [2020-10-28 19:05:51,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:05:51,496 INFO L225 Difference]: With dead ends: 1576 [2020-10-28 19:05:51,496 INFO L226 Difference]: Without dead ends: 1021 [2020-10-28 19:05:51,501 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:05:51,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1021 states. [2020-10-28 19:05:51,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1021 to 1018. [2020-10-28 19:05:51,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1018 states. [2020-10-28 19:05:51,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1018 states to 1018 states and 1577 transitions. [2020-10-28 19:05:51,578 INFO L78 Accepts]: Start accepts. Automaton has 1018 states and 1577 transitions. Word has length 68 [2020-10-28 19:05:51,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:05:51,581 INFO L481 AbstractCegarLoop]: Abstraction has 1018 states and 1577 transitions. [2020-10-28 19:05:51,581 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 19:05:51,581 INFO L276 IsEmpty]: Start isEmpty. Operand 1018 states and 1577 transitions. [2020-10-28 19:05:51,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-28 19:05:51,585 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:05:51,585 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] [2020-10-28 19:05:51,589 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 19:05:51,589 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:05:51,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:05:51,590 INFO L82 PathProgramCache]: Analyzing trace with hash -292895081, now seen corresponding path program 1 times [2020-10-28 19:05:51,590 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:05:51,590 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [364457393] [2020-10-28 19:05:51,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:05:51,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:05:51,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:05:51,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:05:52,940 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:05:52,940 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-28 19:05:52,940 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 19:05:52,940 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1294 [2020-10-28 19:05:52,941 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:05:52,941 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:05:52,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 19:05:52,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-28 19:05:52,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-28 19:05:52,942 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 19:05:53,324 WARN L193 SmtUtils]: Spent 258.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-28 19:05:53,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:05:53,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:05:53,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:05:53,363 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:05:53,363 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:05:53,363 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:05:53,364 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-10-28 19:05:53,364 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:05:53,364 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:05:53,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:05:53,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:05:53,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:05:53,365 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 19:05:53,392 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 19:05:53,392 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [364457393] [2020-10-28 19:05:53,392 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:05:53,393 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-28 19:05:53,393 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597284490] [2020-10-28 19:05:53,393 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 19:05:53,394 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:05:53,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 19:05:53,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-28 19:05:53,395 INFO L87 Difference]: Start difference. First operand 1018 states and 1577 transitions. Second operand 8 states. [2020-10-28 19:05:53,783 WARN L193 SmtUtils]: Spent 316.00 ms on a formula simplification that was a NOOP. DAG size: 182 [2020-10-28 19:05:54,958 WARN L193 SmtUtils]: Spent 264.00 ms on a formula simplification that was a NOOP. DAG size: 174 [2020-10-28 19:05:55,270 WARN L193 SmtUtils]: Spent 281.00 ms on a formula simplification that was a NOOP. DAG size: 176 [2020-10-28 19:05:55,605 WARN L193 SmtUtils]: Spent 301.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2020-10-28 19:05:55,973 WARN L193 SmtUtils]: Spent 326.00 ms on a formula simplification that was a NOOP. DAG size: 180 [2020-10-28 19:05:56,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:05:56,255 INFO L93 Difference]: Finished difference Result 6892 states and 10805 transitions. [2020-10-28 19:05:56,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 19:05:56,256 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 69 [2020-10-28 19:05:56,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:05:56,294 INFO L225 Difference]: With dead ends: 6892 [2020-10-28 19:05:56,294 INFO L226 Difference]: Without dead ends: 5913 [2020-10-28 19:05:56,299 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2020-10-28 19:05:56,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5913 states. [2020-10-28 19:05:56,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5913 to 1994. [2020-10-28 19:05:56,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1994 states. [2020-10-28 19:05:56,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1994 states to 1994 states and 3081 transitions. [2020-10-28 19:05:56,527 INFO L78 Accepts]: Start accepts. Automaton has 1994 states and 3081 transitions. Word has length 69 [2020-10-28 19:05:56,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:05:56,527 INFO L481 AbstractCegarLoop]: Abstraction has 1994 states and 3081 transitions. [2020-10-28 19:05:56,527 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 19:05:56,527 INFO L276 IsEmpty]: Start isEmpty. Operand 1994 states and 3081 transitions. [2020-10-28 19:05:56,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-28 19:05:56,529 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:05:56,529 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] [2020-10-28 19:05:56,529 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 19:05:56,529 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:05:56,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:05:56,530 INFO L82 PathProgramCache]: Analyzing trace with hash -1064613524, now seen corresponding path program 1 times [2020-10-28 19:05:56,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:05:56,531 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2085251339] [2020-10-28 19:05:56,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:05:56,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:05:56,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:05:56,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:05:57,397 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:05:57,397 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-28 19:05:57,397 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 19:05:57,398 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 836 [2020-10-28 19:05:57,398 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:05:57,398 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:05:57,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 19:05:57,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 71 [2020-10-28 19:05:57,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-28 19:05:57,399 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:05:57,726 WARN L193 SmtUtils]: Spent 246.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-28 19:05:57,728 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:05:57,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:05:57,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:05:57,752 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:05:57,753 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:05:57,753 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:05:57,753 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-28 19:05:57,753 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:05:57,753 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:05:57,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:05:57,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:05:57,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:05:57,754 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:05:57,773 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 19:05:57,773 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2085251339] [2020-10-28 19:05:57,774 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:05:57,774 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 19:05:57,774 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857082105] [2020-10-28 19:05:57,775 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 19:05:57,775 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:05:57,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 19:05:57,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:05:57,776 INFO L87 Difference]: Start difference. First operand 1994 states and 3081 transitions. Second operand 5 states. [2020-10-28 19:05:58,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:05:58,977 INFO L93 Difference]: Finished difference Result 4013 states and 6187 transitions. [2020-10-28 19:05:58,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 19:05:58,978 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 70 [2020-10-28 19:05:58,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:05:59,000 INFO L225 Difference]: With dead ends: 4013 [2020-10-28 19:05:59,001 INFO L226 Difference]: Without dead ends: 4010 [2020-10-28 19:05:59,003 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-28 19:05:59,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4010 states. [2020-10-28 19:05:59,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4010 to 2058. [2020-10-28 19:05:59,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2058 states. [2020-10-28 19:05:59,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2058 states to 2058 states and 3145 transitions. [2020-10-28 19:05:59,221 INFO L78 Accepts]: Start accepts. Automaton has 2058 states and 3145 transitions. Word has length 70 [2020-10-28 19:05:59,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:05:59,221 INFO L481 AbstractCegarLoop]: Abstraction has 2058 states and 3145 transitions. [2020-10-28 19:05:59,221 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 19:05:59,221 INFO L276 IsEmpty]: Start isEmpty. Operand 2058 states and 3145 transitions. [2020-10-28 19:05:59,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-28 19:05:59,222 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:05:59,223 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] [2020-10-28 19:05:59,223 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 19:05:59,223 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:05:59,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:05:59,223 INFO L82 PathProgramCache]: Analyzing trace with hash 1654645864, now seen corresponding path program 1 times [2020-10-28 19:05:59,224 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:05:59,224 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1323682730] [2020-10-28 19:05:59,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:05:59,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:05:59,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:05:59,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:06:00,045 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:06:00,045 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-28 19:06:00,046 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 19:06:00,046 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 790 [2020-10-28 19:06:00,046 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:06:00,046 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:06:00,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 19:06:00,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 19:06:00,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-28 19:06:00,047 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:06:00,348 WARN L193 SmtUtils]: Spent 248.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-28 19:06:00,352 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:06:00,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:06:00,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:06:00,374 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:06:00,374 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:06:00,374 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:06:00,374 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-28 19:06:00,374 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:06:00,375 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:06:00,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:06:00,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:06:00,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:06:00,375 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:06:00,399 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 19:06:00,399 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1323682730] [2020-10-28 19:06:00,400 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:06:00,400 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 19:06:00,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219367612] [2020-10-28 19:06:00,401 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 19:06:00,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:06:00,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 19:06:00,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 19:06:00,402 INFO L87 Difference]: Start difference. First operand 2058 states and 3145 transitions. Second operand 4 states. [2020-10-28 19:06:00,718 WARN L193 SmtUtils]: Spent 275.00 ms on a formula simplification that was a NOOP. DAG size: 176 [2020-10-28 19:06:01,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:06:01,690 INFO L93 Difference]: Finished difference Result 5872 states and 8973 transitions. [2020-10-28 19:06:01,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 19:06:01,690 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 71 [2020-10-28 19:06:01,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:06:01,713 INFO L225 Difference]: With dead ends: 5872 [2020-10-28 19:06:01,714 INFO L226 Difference]: Without dead ends: 3853 [2020-10-28 19:06:01,722 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:06:01,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3853 states. [2020-10-28 19:06:02,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3853 to 3818. [2020-10-28 19:06:02,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3818 states. [2020-10-28 19:06:02,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3818 states to 3818 states and 5769 transitions. [2020-10-28 19:06:02,110 INFO L78 Accepts]: Start accepts. Automaton has 3818 states and 5769 transitions. Word has length 71 [2020-10-28 19:06:02,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:06:02,111 INFO L481 AbstractCegarLoop]: Abstraction has 3818 states and 5769 transitions. [2020-10-28 19:06:02,111 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 19:06:02,111 INFO L276 IsEmpty]: Start isEmpty. Operand 3818 states and 5769 transitions. [2020-10-28 19:06:02,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-28 19:06:02,114 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:06:02,114 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] [2020-10-28 19:06:02,114 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 19:06:02,115 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:06:02,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:06:02,115 INFO L82 PathProgramCache]: Analyzing trace with hash 1647096423, now seen corresponding path program 1 times [2020-10-28 19:06:02,116 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:06:02,116 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [539499964] [2020-10-28 19:06:02,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:06:02,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:06:02,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:06:02,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:06:02,451 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:06:02,451 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-28 19:06:02,451 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 19:06:02,452 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 306 [2020-10-28 19:06:02,452 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:06:02,452 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:06:02,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 19:06:02,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 19:06:02,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-28 19:06:02,453 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:06:02,884 WARN L193 SmtUtils]: Spent 318.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-28 19:06:02,886 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:06:02,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:06:02,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:06:02,908 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:06:02,908 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:06:02,908 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:06:02,908 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-28 19:06:02,909 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:06:02,909 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:06:02,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:06:02,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:06:02,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:06:02,909 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:06:02,940 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 19:06:02,941 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [539499964] [2020-10-28 19:06:02,941 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:06:02,942 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 19:06:02,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598919057] [2020-10-28 19:06:02,942 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 19:06:02,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:06:02,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 19:06:02,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:06:02,944 INFO L87 Difference]: Start difference. First operand 3818 states and 5769 transitions. Second operand 5 states. [2020-10-28 19:06:03,365 WARN L193 SmtUtils]: Spent 356.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-10-28 19:06:04,446 WARN L193 SmtUtils]: Spent 267.00 ms on a formula simplification that was a NOOP. DAG size: 179 [2020-10-28 19:06:05,193 WARN L193 SmtUtils]: Spent 287.00 ms on a formula simplification that was a NOOP. DAG size: 176 [2020-10-28 19:06:05,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:06:05,482 INFO L93 Difference]: Finished difference Result 7827 states and 11919 transitions. [2020-10-28 19:06:05,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 19:06:05,483 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 73 [2020-10-28 19:06:05,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:06:05,515 INFO L225 Difference]: With dead ends: 7827 [2020-10-28 19:06:05,515 INFO L226 Difference]: Without dead ends: 5808 [2020-10-28 19:06:05,522 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-28 19:06:05,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5808 states. [2020-10-28 19:06:05,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5808 to 5770. [2020-10-28 19:06:05,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5770 states. [2020-10-28 19:06:06,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5770 states to 5770 states and 8713 transitions. [2020-10-28 19:06:06,007 INFO L78 Accepts]: Start accepts. Automaton has 5770 states and 8713 transitions. Word has length 73 [2020-10-28 19:06:06,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:06:06,007 INFO L481 AbstractCegarLoop]: Abstraction has 5770 states and 8713 transitions. [2020-10-28 19:06:06,007 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 19:06:06,008 INFO L276 IsEmpty]: Start isEmpty. Operand 5770 states and 8713 transitions. [2020-10-28 19:06:06,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-28 19:06:06,009 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:06:06,009 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] [2020-10-28 19:06:06,009 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 19:06:06,009 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:06:06,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:06:06,010 INFO L82 PathProgramCache]: Analyzing trace with hash 1838369665, now seen corresponding path program 1 times [2020-10-28 19:06:06,010 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:06:06,011 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [993501404] [2020-10-28 19:06:06,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:06:06,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:06:06,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:06:06,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:06:06,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:06:06,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:06:08,179 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:06:08,180 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-28 19:06:08,180 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 19:06:08,180 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2143 [2020-10-28 19:06:08,181 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:06:08,181 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:06:08,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 19:06:08,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-28 19:06:08,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-28 19:06:08,182 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 19:06:08,538 WARN L193 SmtUtils]: Spent 288.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-28 19:06:08,539 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:06:08,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:06:08,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:06:08,564 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:06:08,564 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:06:08,564 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:06:08,565 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-28 19:06:08,565 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:06:08,565 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:06:08,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:06:08,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:06:08,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:06:08,566 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 19:06:08,587 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 19:06:08,587 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [993501404] [2020-10-28 19:06:08,587 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:06:08,588 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 19:06:08,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034761404] [2020-10-28 19:06:08,589 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 19:06:08,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:06:08,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 19:06:08,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 19:06:08,590 INFO L87 Difference]: Start difference. First operand 5770 states and 8713 transitions. Second operand 4 states. [2020-10-28 19:06:08,901 WARN L193 SmtUtils]: Spent 272.00 ms on a formula simplification that was a NOOP. DAG size: 176 [2020-10-28 19:06:10,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:06:10,523 INFO L93 Difference]: Finished difference Result 12698 states and 19196 transitions. [2020-10-28 19:06:10,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 19:06:10,523 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 74 [2020-10-28 19:06:10,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:06:10,560 INFO L225 Difference]: With dead ends: 12698 [2020-10-28 19:06:10,560 INFO L226 Difference]: Without dead ends: 8911 [2020-10-28 19:06:10,572 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:06:10,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8911 states. [2020-10-28 19:06:11,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8911 to 8908. [2020-10-28 19:06:11,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8908 states. [2020-10-28 19:06:11,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8908 states to 8908 states and 13387 transitions. [2020-10-28 19:06:11,329 INFO L78 Accepts]: Start accepts. Automaton has 8908 states and 13387 transitions. Word has length 74 [2020-10-28 19:06:11,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:06:11,329 INFO L481 AbstractCegarLoop]: Abstraction has 8908 states and 13387 transitions. [2020-10-28 19:06:11,330 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 19:06:11,330 INFO L276 IsEmpty]: Start isEmpty. Operand 8908 states and 13387 transitions. [2020-10-28 19:06:11,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-10-28 19:06:11,334 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:06:11,335 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:06:11,335 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 19:06:11,335 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:06:11,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:06:11,336 INFO L82 PathProgramCache]: Analyzing trace with hash 941329466, now seen corresponding path program 1 times [2020-10-28 19:06:11,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:06:11,336 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1738923725] [2020-10-28 19:06:11,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:06:11,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:06:11,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:06:11,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:06:11,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:06:11,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:06:12,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:06:12,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:06:15,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:06:16,368 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:06:16,368 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 105 [2020-10-28 19:06:16,368 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 19:06:16,368 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-28 19:06:16,369 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:06:16,369 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:06:16,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 19:06:16,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 51 [2020-10-28 19:06:16,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-28 19:06:16,369 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:06:16,734 WARN L193 SmtUtils]: Spent 293.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-28 19:06:16,735 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:06:16,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:06:16,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:06:16,756 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:06:16,757 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:06:16,757 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:06:16,757 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-28 19:06:16,758 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:06:16,758 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:06:16,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:06:16,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:06:16,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:06:16,759 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 19:06:16,790 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:06:16,790 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1738923725] [2020-10-28 19:06:16,790 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:06:16,790 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 19:06:16,791 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220951775] [2020-10-28 19:06:16,791 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 19:06:16,791 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:06:16,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 19:06:16,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 19:06:16,793 INFO L87 Difference]: Start difference. First operand 8908 states and 13387 transitions. Second operand 4 states. [2020-10-28 19:06:17,128 WARN L193 SmtUtils]: Spent 285.00 ms on a formula simplification that was a NOOP. DAG size: 176 [2020-10-28 19:06:18,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:06:18,511 INFO L93 Difference]: Finished difference Result 25762 states and 38639 transitions. [2020-10-28 19:06:18,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 19:06:18,523 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 97 [2020-10-28 19:06:18,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:06:18,566 INFO L225 Difference]: With dead ends: 25762 [2020-10-28 19:06:18,566 INFO L226 Difference]: Without dead ends: 16895 [2020-10-28 19:06:18,593 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:06:18,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16895 states. [2020-10-28 19:06:19,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16895 to 16892. [2020-10-28 19:06:19,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16892 states. [2020-10-28 19:06:19,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16892 states to 16892 states and 25131 transitions. [2020-10-28 19:06:19,770 INFO L78 Accepts]: Start accepts. Automaton has 16892 states and 25131 transitions. Word has length 97 [2020-10-28 19:06:19,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:06:19,771 INFO L481 AbstractCegarLoop]: Abstraction has 16892 states and 25131 transitions. [2020-10-28 19:06:19,771 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 19:06:19,771 INFO L276 IsEmpty]: Start isEmpty. Operand 16892 states and 25131 transitions. [2020-10-28 19:06:19,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-10-28 19:06:19,779 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:06:19,779 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:06:19,779 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 19:06:19,780 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:06:19,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:06:19,780 INFO L82 PathProgramCache]: Analyzing trace with hash -1008590939, now seen corresponding path program 1 times [2020-10-28 19:06:19,780 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:06:19,781 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2002099603] [2020-10-28 19:06:19,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:06:19,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:06:19,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:06:19,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:06:19,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:06:20,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:06:20,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:06:20,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:06:23,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:06:24,825 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:06:24,825 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 105 [2020-10-28 19:06:24,826 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 19:06:24,826 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5019 [2020-10-28 19:06:24,826 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:06:24,828 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:06:24,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 19:06:24,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 56 [2020-10-28 19:06:24,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-28 19:06:24,829 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-28 19:06:25,124 WARN L193 SmtUtils]: Spent 242.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-28 19:06:25,125 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:06:25,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:06:25,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:06:25,141 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:06:25,141 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:06:25,141 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:06:25,142 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-28 19:06:25,142 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:06:25,142 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:06:25,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:06:25,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:06:25,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:06:25,143 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:06:25,166 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:06:25,166 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2002099603] [2020-10-28 19:06:25,166 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:06:25,166 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 19:06:25,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200027743] [2020-10-28 19:06:25,167 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 19:06:25,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:06:25,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 19:06:25,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 19:06:25,168 INFO L87 Difference]: Start difference. First operand 16892 states and 25131 transitions. Second operand 4 states. [2020-10-28 19:06:25,470 WARN L193 SmtUtils]: Spent 262.00 ms on a formula simplification that was a NOOP. DAG size: 176 [2020-10-28 19:06:27,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:06:27,713 INFO L93 Difference]: Finished difference Result 48834 states and 72431 transitions. [2020-10-28 19:06:27,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 19:06:27,713 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 97 [2020-10-28 19:06:27,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:06:27,790 INFO L225 Difference]: With dead ends: 48834 [2020-10-28 19:06:27,790 INFO L226 Difference]: Without dead ends: 31983 [2020-10-28 19:06:27,830 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:06:27,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31983 states. [2020-10-28 19:06:30,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31983 to 31980. [2020-10-28 19:06:30,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31980 states. [2020-10-28 19:06:30,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31980 states to 31980 states and 47019 transitions. [2020-10-28 19:06:30,074 INFO L78 Accepts]: Start accepts. Automaton has 31980 states and 47019 transitions. Word has length 97 [2020-10-28 19:06:30,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:06:30,074 INFO L481 AbstractCegarLoop]: Abstraction has 31980 states and 47019 transitions. [2020-10-28 19:06:30,075 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 19:06:30,075 INFO L276 IsEmpty]: Start isEmpty. Operand 31980 states and 47019 transitions. [2020-10-28 19:06:30,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-10-28 19:06:30,085 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:06:30,086 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:06:30,086 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-28 19:06:30,086 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:06:30,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:06:30,087 INFO L82 PathProgramCache]: Analyzing trace with hash 404072998, now seen corresponding path program 1 times [2020-10-28 19:06:30,087 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:06:30,087 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [886316836] [2020-10-28 19:06:30,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:06:30,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:06:30,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:06:30,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:06:30,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:06:30,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:06:30,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:06:30,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:06:32,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:06:35,112 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:06:35,113 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 105 [2020-10-28 19:06:35,113 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 19:06:35,113 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-28 19:06:35,113 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:06:35,113 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:06:35,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 19:06:35,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 61 [2020-10-28 19:06:35,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-28 19:06:35,114 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:06:35,415 WARN L193 SmtUtils]: Spent 259.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-28 19:06:35,416 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:06:35,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:06:35,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:06:35,432 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:06:35,432 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:06:35,432 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:06:35,433 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-28 19:06:35,433 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:06:35,433 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:06:35,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:06:35,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:06:35,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:06:35,433 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:06:35,454 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:06:35,455 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [886316836] [2020-10-28 19:06:35,455 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:06:35,455 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 19:06:35,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173912522] [2020-10-28 19:06:35,456 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 19:06:35,456 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:06:35,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 19:06:35,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 19:06:35,457 INFO L87 Difference]: Start difference. First operand 31980 states and 47019 transitions. Second operand 4 states. [2020-10-28 19:06:35,798 WARN L193 SmtUtils]: Spent 302.00 ms on a formula simplification that was a NOOP. DAG size: 176 [2020-10-28 19:06:39,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:06:39,720 INFO L93 Difference]: Finished difference Result 92338 states and 135215 transitions. [2020-10-28 19:06:39,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 19:06:39,721 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 97 [2020-10-28 19:06:39,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:06:39,867 INFO L225 Difference]: With dead ends: 92338 [2020-10-28 19:06:39,867 INFO L226 Difference]: Without dead ends: 60399 [2020-10-28 19:06:40,081 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:06:40,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60399 states. [2020-10-28 19:06:44,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60399 to 60396. [2020-10-28 19:06:44,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60396 states. [2020-10-28 19:06:44,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60396 states to 60396 states and 87595 transitions. [2020-10-28 19:06:44,134 INFO L78 Accepts]: Start accepts. Automaton has 60396 states and 87595 transitions. Word has length 97 [2020-10-28 19:06:44,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:06:44,134 INFO L481 AbstractCegarLoop]: Abstraction has 60396 states and 87595 transitions. [2020-10-28 19:06:44,134 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 19:06:44,134 INFO L276 IsEmpty]: Start isEmpty. Operand 60396 states and 87595 transitions. [2020-10-28 19:06:44,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-10-28 19:06:44,154 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:06:44,154 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:06:44,154 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-28 19:06:44,155 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:06:44,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:06:44,155 INFO L82 PathProgramCache]: Analyzing trace with hash -1802935875, now seen corresponding path program 1 times [2020-10-28 19:06:44,155 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:06:44,156 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [455391525] [2020-10-28 19:06:44,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:06:44,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:06:44,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:06:44,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:06:44,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:06:44,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:06:44,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:06:45,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:06:45,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:06:49,192 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:06:49,192 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 105 [2020-10-28 19:06:49,192 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 19:06:49,192 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-28 19:06:49,192 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:06:49,193 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:06:49,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 19:06:49,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 48 [2020-10-28 19:06:49,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-28 19:06:49,193 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:06:49,501 WARN L193 SmtUtils]: Spent 251.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-28 19:06:49,502 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:06:49,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:06:49,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:06:49,519 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:06:49,520 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:06:49,520 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:06:49,520 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-28 19:06:49,520 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:06:49,520 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:06:49,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:06:49,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:06:49,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:06:49,521 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:06:49,551 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:06:49,551 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [455391525] [2020-10-28 19:06:49,552 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:06:49,552 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 19:06:49,552 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425890654] [2020-10-28 19:06:49,553 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 19:06:49,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:06:49,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 19:06:49,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 19:06:49,554 INFO L87 Difference]: Start difference. First operand 60396 states and 87595 transitions. Second operand 4 states. [2020-10-28 19:06:51,527 WARN L193 SmtUtils]: Spent 271.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2020-10-28 19:06:53,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:06:53,195 INFO L93 Difference]: Finished difference Result 103154 states and 149708 transitions. [2020-10-28 19:06:53,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 19:06:53,196 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 97 [2020-10-28 19:06:53,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:06:53,283 INFO L225 Difference]: With dead ends: 103154 [2020-10-28 19:06:53,284 INFO L226 Difference]: Without dead ends: 42799 [2020-10-28 19:06:53,367 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:06:53,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42799 states. [2020-10-28 19:06:56,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42799 to 42796. [2020-10-28 19:06:56,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42796 states. [2020-10-28 19:06:56,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42796 states to 42796 states and 61632 transitions. [2020-10-28 19:06:56,244 INFO L78 Accepts]: Start accepts. Automaton has 42796 states and 61632 transitions. Word has length 97 [2020-10-28 19:06:56,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:06:56,244 INFO L481 AbstractCegarLoop]: Abstraction has 42796 states and 61632 transitions. [2020-10-28 19:06:56,244 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 19:06:56,244 INFO L276 IsEmpty]: Start isEmpty. Operand 42796 states and 61632 transitions. [2020-10-28 19:06:56,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-10-28 19:06:56,255 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:06:56,255 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:06:56,255 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-28 19:06:56,256 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:06:56,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:06:56,256 INFO L82 PathProgramCache]: Analyzing trace with hash 797908614, now seen corresponding path program 1 times [2020-10-28 19:06:56,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:06:56,257 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [292856541] [2020-10-28 19:06:56,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:06:56,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:06:56,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:06:56,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:06:56,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:06:56,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:06:57,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:07:01,292 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:07:01,293 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 107 [2020-10-28 19:07:01,293 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 19:07:01,293 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-28 19:07:01,293 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:07:01,293 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:07:01,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 19:07:01,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 47 [2020-10-28 19:07:01,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-28 19:07:01,294 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:07:01,576 WARN L193 SmtUtils]: Spent 254.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-28 19:07:01,577 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:07:01,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:07:01,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:07:01,591 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:07:01,592 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:07:01,592 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:07:01,592 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 19:07:01,592 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:07:01,592 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:07:01,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:07:01,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:07:01,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:07:01,593 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:07:01,616 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:07:01,617 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [292856541] [2020-10-28 19:07:01,617 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:07:01,617 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 19:07:01,618 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211327591] [2020-10-28 19:07:01,618 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 19:07:01,618 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:07:01,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 19:07:01,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 19:07:01,619 INFO L87 Difference]: Start difference. First operand 42796 states and 61632 transitions. Second operand 4 states. [2020-10-28 19:07:01,935 WARN L193 SmtUtils]: Spent 266.00 ms on a formula simplification that was a NOOP. DAG size: 176 [2020-10-28 19:07:06,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:07:06,920 INFO L93 Difference]: Finished difference Result 124236 states and 178455 transitions. [2020-10-28 19:07:06,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 19:07:06,921 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 99 [2020-10-28 19:07:06,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:07:07,042 INFO L225 Difference]: With dead ends: 124236 [2020-10-28 19:07:07,042 INFO L226 Difference]: Without dead ends: 81777 [2020-10-28 19:07:07,100 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:07:07,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81777 states. [2020-10-28 19:07:12,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81777 to 81774. [2020-10-28 19:07:12,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81774 states. [2020-10-28 19:07:12,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81774 states to 81774 states and 116518 transitions. [2020-10-28 19:07:12,799 INFO L78 Accepts]: Start accepts. Automaton has 81774 states and 116518 transitions. Word has length 99 [2020-10-28 19:07:12,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:07:12,800 INFO L481 AbstractCegarLoop]: Abstraction has 81774 states and 116518 transitions. [2020-10-28 19:07:12,800 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 19:07:12,800 INFO L276 IsEmpty]: Start isEmpty. Operand 81774 states and 116518 transitions. [2020-10-28 19:07:12,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-10-28 19:07:12,814 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:07:12,814 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:07:12,814 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-28 19:07:12,814 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:07:12,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:07:12,815 INFO L82 PathProgramCache]: Analyzing trace with hash 751388254, now seen corresponding path program 1 times [2020-10-28 19:07:12,815 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:07:12,815 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1027223413] [2020-10-28 19:07:12,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:07:12,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:07:12,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:07:12,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:07:13,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:07:13,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:07:13,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:07:17,375 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:07:17,375 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 107 [2020-10-28 19:07:17,375 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 19:07:17,376 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4535 [2020-10-28 19:07:17,376 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:07:17,376 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:07:17,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 19:07:17,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 66 [2020-10-28 19:07:17,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-28 19:07:17,377 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 19:07:17,708 WARN L193 SmtUtils]: Spent 272.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-28 19:07:17,709 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:07:17,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:07:17,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:07:17,725 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:07:17,726 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:07:17,726 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:07:17,726 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-28 19:07:17,726 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:07:17,727 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:07:17,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:07:17,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:07:17,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:07:17,727 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:07:17,751 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:07:17,751 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1027223413] [2020-10-28 19:07:17,751 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:07:17,752 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 19:07:17,752 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026587497] [2020-10-28 19:07:17,752 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 19:07:17,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:07:17,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 19:07:17,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 19:07:17,756 INFO L87 Difference]: Start difference. First operand 81774 states and 116518 transitions. Second operand 4 states. [2020-10-28 19:07:18,077 WARN L193 SmtUtils]: Spent 284.00 ms on a formula simplification that was a NOOP. DAG size: 176 [2020-10-28 19:07:27,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:07:27,790 INFO L93 Difference]: Finished difference Result 228320 states and 322301 transitions. [2020-10-28 19:07:27,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 19:07:27,791 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 99 [2020-10-28 19:07:27,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:07:28,042 INFO L225 Difference]: With dead ends: 228320 [2020-10-28 19:07:28,042 INFO L226 Difference]: Without dead ends: 151848 [2020-10-28 19:07:28,112 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:07:28,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151848 states. [2020-10-28 19:07:38,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151848 to 151845. [2020-10-28 19:07:38,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151845 states. [2020-10-28 19:07:38,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151845 states to 151845 states and 212124 transitions. [2020-10-28 19:07:38,883 INFO L78 Accepts]: Start accepts. Automaton has 151845 states and 212124 transitions. Word has length 99 [2020-10-28 19:07:38,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:07:38,883 INFO L481 AbstractCegarLoop]: Abstraction has 151845 states and 212124 transitions. [2020-10-28 19:07:38,884 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 19:07:38,884 INFO L276 IsEmpty]: Start isEmpty. Operand 151845 states and 212124 transitions. [2020-10-28 19:07:38,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-10-28 19:07:38,902 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:07:38,902 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:07:38,902 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-28 19:07:38,903 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:07:38,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:07:38,903 INFO L82 PathProgramCache]: Analyzing trace with hash -2107051022, now seen corresponding path program 1 times [2020-10-28 19:07:38,903 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:07:38,904 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [12589463] [2020-10-28 19:07:38,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:07:38,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:07:38,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:07:38,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:07:39,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:07:39,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:07:39,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:07:43,219 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:07:43,219 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 109 [2020-10-28 19:07:43,219 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 19:07:43,219 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4289 [2020-10-28 19:07:43,219 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:07:43,220 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:07:43,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 19:07:43,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-28 19:07:43,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 88 [2020-10-28 19:07:43,220 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:07:43,575 WARN L193 SmtUtils]: Spent 265.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-28 19:07:43,576 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:07:43,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:07:43,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:07:43,604 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:07:43,604 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:07:43,604 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:07:43,604 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-28 19:07:43,605 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:07:43,605 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:07:43,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:07:43,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:07:43,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:07:43,608 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 19:07:43,647 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-28 19:07:43,651 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [12589463] [2020-10-28 19:07:43,655 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 19:07:43,655 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 19:07:43,655 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018768317] [2020-10-28 19:07:43,656 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 19:07:43,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:07:43,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 19:07:43,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-28 19:07:43,657 INFO L87 Difference]: Start difference. First operand 151845 states and 212124 transitions. Second operand 8 states. [2020-10-28 19:07:44,037 WARN L193 SmtUtils]: Spent 310.00 ms on a formula simplification that was a NOOP. DAG size: 183 [2020-10-28 19:07:46,036 WARN L193 SmtUtils]: Spent 282.00 ms on a formula simplification that was a NOOP. DAG size: 176 [2020-10-28 19:07:46,349 WARN L193 SmtUtils]: Spent 288.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2020-10-28 19:07:46,658 WARN L193 SmtUtils]: Spent 273.00 ms on a formula simplification that was a NOOP. DAG size: 174 [2020-10-28 19:08:03,434 WARN L193 SmtUtils]: Spent 300.00 ms on a formula simplification that was a NOOP. DAG size: 179 [2020-10-28 19:08:03,904 WARN L193 SmtUtils]: Spent 435.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-10-28 19:08:04,219 WARN L193 SmtUtils]: Spent 245.00 ms on a formula simplification that was a NOOP. DAG size: 177 [2020-10-28 19:08:04,688 WARN L193 SmtUtils]: Spent 276.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-28 19:08:24,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:08:24,700 INFO L93 Difference]: Finished difference Result 648130 states and 918959 transitions. [2020-10-28 19:08:24,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-28 19:08:24,700 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 101 [2020-10-28 19:08:24,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:08:25,925 INFO L225 Difference]: With dead ends: 648130 [2020-10-28 19:08:25,925 INFO L226 Difference]: Without dead ends: 590847 [2020-10-28 19:08:26,329 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=151, Invalid=355, Unknown=0, NotChecked=0, Total=506 [2020-10-28 19:08:26,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 590847 states. [2020-10-28 19:08:47,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 590847 to 246475. [2020-10-28 19:08:47,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 246475 states. [2020-10-28 19:08:48,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246475 states to 246475 states and 344429 transitions. [2020-10-28 19:08:48,599 INFO L78 Accepts]: Start accepts. Automaton has 246475 states and 344429 transitions. Word has length 101 [2020-10-28 19:08:48,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:08:48,600 INFO L481 AbstractCegarLoop]: Abstraction has 246475 states and 344429 transitions. [2020-10-28 19:08:48,600 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 19:08:48,600 INFO L276 IsEmpty]: Start isEmpty. Operand 246475 states and 344429 transitions. [2020-10-28 19:08:48,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-10-28 19:08:48,620 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:08:48,620 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:08:48,620 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-28 19:08:48,620 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:08:48,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:08:48,621 INFO L82 PathProgramCache]: Analyzing trace with hash -1504226338, now seen corresponding path program 1 times [2020-10-28 19:08:48,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:08:48,621 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [560824152] [2020-10-28 19:08:48,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:08:48,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:08:48,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:08:49,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:08:49,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:08:49,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:08:49,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking...