/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=SHALLOWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.3.1.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 05:08:46,282 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 05:08:46,285 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 05:08:46,318 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 05:08:46,319 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 05:08:46,321 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 05:08:46,322 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 05:08:46,325 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 05:08:46,327 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 05:08:46,328 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 05:08:46,330 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 05:08:46,331 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 05:08:46,332 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 05:08:46,333 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 05:08:46,335 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 05:08:46,336 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 05:08:46,337 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 05:08:46,339 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 05:08:46,341 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 05:08:46,344 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 05:08:46,346 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 05:08:46,348 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 05:08:46,350 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 05:08:46,351 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 05:08:46,355 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 05:08:46,356 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 05:08:46,356 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 05:08:46,357 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 05:08:46,358 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 05:08:46,360 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 05:08:46,360 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 05:08:46,361 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 05:08:46,362 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 05:08:46,363 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 05:08:46,365 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 05:08:46,365 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 05:08:46,366 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 05:08:46,366 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 05:08:46,367 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 05:08:46,368 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 05:08:46,369 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 05:08:46,370 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-27 05:08:46,397 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 05:08:46,397 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 05:08:46,398 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 05:08:46,399 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 05:08:46,399 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 05:08:46,399 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 05:08:46,400 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 05:08:46,400 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 05:08:46,400 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 05:08:46,400 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 05:08:46,400 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 05:08:46,401 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 05:08:46,401 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 05:08:46,401 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 05:08:46,401 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 05:08:46,402 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 05:08:46,402 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 05:08:46,402 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 05:08:46,402 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 05:08:46,403 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 05:08:46,403 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 05:08:46,403 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 05:08:46,403 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 05:08:46,404 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 05:08:46,404 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 05:08:46,404 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 05:08:46,404 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 05:08:46,405 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 05:08:46,405 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 05:08:46,405 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 05:08:46,870 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 05:08:46,917 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 05:08:46,921 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 05:08:46,922 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 05:08:46,923 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 05:08:46,924 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.3.1.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2020-10-27 05:08:47,001 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/056ac2cce/402542aebe18402c84857c08672f2fe7/FLAGc7daa4a69 [2020-10-27 05:08:47,633 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 05:08:47,634 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.3.1.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2020-10-27 05:08:47,653 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/056ac2cce/402542aebe18402c84857c08672f2fe7/FLAGc7daa4a69 [2020-10-27 05:08:47,930 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/056ac2cce/402542aebe18402c84857c08672f2fe7 [2020-10-27 05:08:47,934 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 05:08:47,943 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 05:08:47,947 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 05:08:47,947 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 05:08:47,951 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 05:08:47,953 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 05:08:47" (1/1) ... [2020-10-27 05:08:47,958 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6557c3ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:08:47, skipping insertion in model container [2020-10-27 05:08:47,958 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 05:08:47" (1/1) ... [2020-10-27 05:08:47,968 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 05:08:48,025 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 05:08:48,341 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 05:08:48,358 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 05:08:48,420 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 05:08:48,461 INFO L208 MainTranslator]: Completed translation [2020-10-27 05:08:48,462 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:08:48 WrapperNode [2020-10-27 05:08:48,462 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 05:08:48,463 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 05:08:48,463 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 05:08:48,463 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 05:08:48,477 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:08:48" (1/1) ... [2020-10-27 05:08:48,479 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:08:48" (1/1) ... [2020-10-27 05:08:48,508 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:08:48" (1/1) ... [2020-10-27 05:08:48,508 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:08:48" (1/1) ... [2020-10-27 05:08:48,534 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:08:48" (1/1) ... [2020-10-27 05:08:48,543 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:08:48" (1/1) ... [2020-10-27 05:08:48,545 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:08:48" (1/1) ... [2020-10-27 05:08:48,549 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 05:08:48,550 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 05:08:48,550 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 05:08:48,550 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 05:08:48,551 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:08:48" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 05:08:48,633 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 05:08:48,634 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 05:08:48,634 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 05:08:48,634 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-27 05:08:48,634 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 05:08:48,634 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 05:08:48,635 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 05:08:48,635 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 05:08:48,635 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 05:08:48,635 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-27 05:08:48,635 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-27 05:08:48,635 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-27 05:08:48,636 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-27 05:08:48,636 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-27 05:08:48,636 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-27 05:08:48,636 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-27 05:08:48,636 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-27 05:08:48,637 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-27 05:08:48,637 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-27 05:08:48,637 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-27 05:08:48,637 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 05:08:48,637 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 05:08:48,637 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 05:08:48,638 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 05:08:48,638 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 05:08:48,638 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 05:08:48,638 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 05:08:49,278 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 05:08:49,278 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-27 05:08:49,280 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 05:08:49 BoogieIcfgContainer [2020-10-27 05:08:49,280 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 05:08:49,282 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 05:08:49,282 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 05:08:49,285 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 05:08:49,285 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 05:08:47" (1/3) ... [2020-10-27 05:08:49,286 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@703ad0b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 05:08:49, skipping insertion in model container [2020-10-27 05:08:49,286 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:08:48" (2/3) ... [2020-10-27 05:08:49,287 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@703ad0b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 05:08:49, skipping insertion in model container [2020-10-27 05:08:49,287 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 05:08:49" (3/3) ... [2020-10-27 05:08:49,288 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.3.1.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2020-10-27 05:08:49,300 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 05:08:49,305 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 05:08:49,317 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 05:08:49,343 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 05:08:49,343 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 05:08:49,344 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 05:08:49,344 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 05:08:49,344 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 05:08:49,344 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 05:08:49,344 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 05:08:49,344 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 05:08:49,362 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states. [2020-10-27 05:08:49,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-27 05:08:49,369 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:08:49,370 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] [2020-10-27 05:08:49,371 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:08:49,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:08:49,377 INFO L82 PathProgramCache]: Analyzing trace with hash -423992621, now seen corresponding path program 1 times [2020-10-27 05:08:49,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:08:49,387 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [346633926] [2020-10-27 05:08:49,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:08:49,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:08:49,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:08:49,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:08:49,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:08:50,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:08:52,023 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:08:52,024 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-27 05:08:52,024 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 05:08:52,024 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2432 [2020-10-27 05:08:52,026 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:08:52,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 05:08:52,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 05:08:52,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-27 05:08:52,027 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 05:08:52,409 WARN L193 SmtUtils]: Spent 260.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-10-27 05:08:52,412 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:08:52,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:08:52,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:08:52,450 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:08:52,450 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:08:52,450 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:08:52,451 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 29 [2020-10-27 05:08:52,451 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:08:52,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:08:52,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:08:52,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:08:52,452 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:08:52,495 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:08:52,496 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [346633926] [2020-10-27 05:08:52,498 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:08:52,498 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 05:08:52,499 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694509580] [2020-10-27 05:08:52,505 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 05:08:52,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:08:52,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 05:08:52,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:08:52,527 INFO L87 Difference]: Start difference. First operand 71 states. Second operand 6 states. [2020-10-27 05:08:52,927 WARN L193 SmtUtils]: Spent 283.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-10-27 05:08:53,754 WARN L193 SmtUtils]: Spent 265.00 ms on a formula simplification that was a NOOP. DAG size: 120 [2020-10-27 05:08:54,146 WARN L193 SmtUtils]: Spent 357.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2020-10-27 05:08:54,527 WARN L193 SmtUtils]: Spent 302.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2020-10-27 05:08:54,832 WARN L193 SmtUtils]: Spent 273.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2020-10-27 05:08:54,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:08:54,893 INFO L93 Difference]: Finished difference Result 341 states and 532 transitions. [2020-10-27 05:08:54,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 05:08:54,896 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 41 [2020-10-27 05:08:54,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:08:54,909 INFO L225 Difference]: With dead ends: 341 [2020-10-27 05:08:54,909 INFO L226 Difference]: Without dead ends: 269 [2020-10-27 05:08:54,913 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2020-10-27 05:08:54,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2020-10-27 05:08:54,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 102. [2020-10-27 05:08:54,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-10-27 05:08:54,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 147 transitions. [2020-10-27 05:08:54,980 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 147 transitions. Word has length 41 [2020-10-27 05:08:54,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:08:54,981 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 147 transitions. [2020-10-27 05:08:54,981 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 05:08:54,981 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 147 transitions. [2020-10-27 05:08:54,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-27 05:08:54,983 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:08:54,984 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] [2020-10-27 05:08:54,984 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 05:08:54,985 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:08:54,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:08:54,986 INFO L82 PathProgramCache]: Analyzing trace with hash -1863949304, now seen corresponding path program 1 times [2020-10-27 05:08:54,986 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:08:54,986 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [254737939] [2020-10-27 05:08:54,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:08:55,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:08:55,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:08:55,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:08:55,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:08:55,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:08:55,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:08:55,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:08:59,356 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:08:59,356 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-27 05:08:59,356 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 05:08:59,357 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4343 [2020-10-27 05:08:59,357 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:08:59,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 05:08:59,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:08:59,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-27 05:08:59,358 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:08:59,845 WARN L193 SmtUtils]: Spent 238.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-10-27 05:08:59,846 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:08:59,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:08:59,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:08:59,876 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:08:59,876 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:08:59,877 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:08:59,877 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-27 05:08:59,877 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:08:59,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:08:59,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:08:59,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:08:59,878 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:08:59,898 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:08:59,898 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [254737939] [2020-10-27 05:08:59,899 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:08:59,899 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 05:08:59,899 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580150673] [2020-10-27 05:08:59,901 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 05:08:59,901 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:08:59,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 05:08:59,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-27 05:08:59,902 INFO L87 Difference]: Start difference. First operand 102 states and 147 transitions. Second operand 7 states. [2020-10-27 05:09:00,199 WARN L193 SmtUtils]: Spent 248.00 ms on a formula simplification that was a NOOP. DAG size: 125 [2020-10-27 05:09:00,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:09:00,780 INFO L93 Difference]: Finished difference Result 289 states and 439 transitions. [2020-10-27 05:09:00,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 05:09:00,781 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 43 [2020-10-27 05:09:00,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:09:00,784 INFO L225 Difference]: With dead ends: 289 [2020-10-27 05:09:00,785 INFO L226 Difference]: Without dead ends: 210 [2020-10-27 05:09:00,786 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-10-27 05:09:00,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2020-10-27 05:09:00,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 119. [2020-10-27 05:09:00,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-10-27 05:09:00,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 172 transitions. [2020-10-27 05:09:00,811 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 172 transitions. Word has length 43 [2020-10-27 05:09:00,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:09:00,811 INFO L481 AbstractCegarLoop]: Abstraction has 119 states and 172 transitions. [2020-10-27 05:09:00,812 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 05:09:00,812 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 172 transitions. [2020-10-27 05:09:00,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-27 05:09:00,814 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:09:00,814 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] [2020-10-27 05:09:00,814 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 05:09:00,814 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:09:00,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:09:00,815 INFO L82 PathProgramCache]: Analyzing trace with hash -1127847422, now seen corresponding path program 1 times [2020-10-27 05:09:00,815 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:09:00,816 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1231750604] [2020-10-27 05:09:00,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:09:00,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:09:00,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:09:00,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:09:00,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:09:00,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:09:01,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:09:01,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:09:04,356 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:09:04,357 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-27 05:09:04,357 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 05:09:04,359 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3520 [2020-10-27 05:09:04,359 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:09:04,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 05:09:04,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:09:04,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-27 05:09:04,360 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:09:04,778 WARN L193 SmtUtils]: Spent 237.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-10-27 05:09:04,779 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:09:04,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:09:04,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:09:04,810 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:09:04,811 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:09:04,811 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:09:04,811 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-27 05:09:04,811 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:09:04,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:09:04,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:09:04,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:09:04,812 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:09:04,837 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:09:04,838 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1231750604] [2020-10-27 05:09:04,839 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:09:04,839 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 05:09:04,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344828421] [2020-10-27 05:09:04,840 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 05:09:04,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:09:04,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 05:09:04,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-27 05:09:04,844 INFO L87 Difference]: Start difference. First operand 119 states and 172 transitions. Second operand 7 states. [2020-10-27 05:09:05,148 WARN L193 SmtUtils]: Spent 249.00 ms on a formula simplification that was a NOOP. DAG size: 125 [2020-10-27 05:09:05,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:09:05,782 INFO L93 Difference]: Finished difference Result 285 states and 429 transitions. [2020-10-27 05:09:05,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 05:09:05,783 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 43 [2020-10-27 05:09:05,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:09:05,785 INFO L225 Difference]: With dead ends: 285 [2020-10-27 05:09:05,785 INFO L226 Difference]: Without dead ends: 206 [2020-10-27 05:09:05,787 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-10-27 05:09:05,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2020-10-27 05:09:05,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 135. [2020-10-27 05:09:05,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2020-10-27 05:09:05,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 194 transitions. [2020-10-27 05:09:05,819 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 194 transitions. Word has length 43 [2020-10-27 05:09:05,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:09:05,820 INFO L481 AbstractCegarLoop]: Abstraction has 135 states and 194 transitions. [2020-10-27 05:09:05,820 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 05:09:05,820 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 194 transitions. [2020-10-27 05:09:05,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-27 05:09:05,822 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:09:05,822 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] [2020-10-27 05:09:05,822 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 05:09:05,822 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:09:05,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:09:05,823 INFO L82 PathProgramCache]: Analyzing trace with hash -736230407, now seen corresponding path program 1 times [2020-10-27 05:09:05,823 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:09:05,823 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [338188847] [2020-10-27 05:09:05,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:09:05,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:09:05,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:09:05,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:09:05,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:09:05,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:09:06,891 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:09:06,892 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-27 05:09:06,892 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 05:09:06,892 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1050 [2020-10-27 05:09:06,892 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:09:06,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 05:09:06,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 05:09:06,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-27 05:09:06,893 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:09:07,257 WARN L193 SmtUtils]: Spent 251.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-10-27 05:09:07,259 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:09:07,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:09:07,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:09:07,272 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:09:07,273 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:09:07,273 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:09:07,273 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 05:09:07,274 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:09:07,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:09:07,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:09:07,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:09:07,274 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:09:07,290 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:09:07,290 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [338188847] [2020-10-27 05:09:07,291 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:09:07,291 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 05:09:07,291 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176071647] [2020-10-27 05:09:07,291 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 05:09:07,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:09:07,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 05:09:07,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:09:07,293 INFO L87 Difference]: Start difference. First operand 135 states and 194 transitions. Second operand 6 states. [2020-10-27 05:09:07,656 WARN L193 SmtUtils]: Spent 297.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2020-10-27 05:09:08,256 WARN L193 SmtUtils]: Spent 263.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-10-27 05:09:08,694 WARN L193 SmtUtils]: Spent 296.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2020-10-27 05:09:09,032 WARN L193 SmtUtils]: Spent 307.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-10-27 05:09:09,379 WARN L193 SmtUtils]: Spent 288.00 ms on a formula simplification that was a NOOP. DAG size: 126 [2020-10-27 05:09:09,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:09:09,402 INFO L93 Difference]: Finished difference Result 381 states and 572 transitions. [2020-10-27 05:09:09,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 05:09:09,403 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 43 [2020-10-27 05:09:09,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:09:09,408 INFO L225 Difference]: With dead ends: 381 [2020-10-27 05:09:09,409 INFO L226 Difference]: Without dead ends: 302 [2020-10-27 05:09:09,410 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2020-10-27 05:09:09,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2020-10-27 05:09:09,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 135. [2020-10-27 05:09:09,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2020-10-27 05:09:09,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 193 transitions. [2020-10-27 05:09:09,451 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 193 transitions. Word has length 43 [2020-10-27 05:09:09,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:09:09,452 INFO L481 AbstractCegarLoop]: Abstraction has 135 states and 193 transitions. [2020-10-27 05:09:09,452 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 05:09:09,452 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 193 transitions. [2020-10-27 05:09:09,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-27 05:09:09,461 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:09:09,461 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] [2020-10-27 05:09:09,462 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 05:09:09,462 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:09:09,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:09:09,464 INFO L82 PathProgramCache]: Analyzing trace with hash -1357760040, now seen corresponding path program 1 times [2020-10-27 05:09:09,464 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:09:09,464 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1355646324] [2020-10-27 05:09:09,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:09:09,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:09:09,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:09:09,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:09:09,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:09:09,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:09:09,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:09:10,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:09:10,624 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:09:10,624 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-27 05:09:10,624 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 05:09:10,625 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1132 [2020-10-27 05:09:10,625 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:09:10,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 05:09:10,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 05:09:10,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-27 05:09:10,625 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:09:10,955 WARN L193 SmtUtils]: Spent 249.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-10-27 05:09:10,956 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:09:10,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:09:10,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:09:10,968 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:09:10,969 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:09:10,969 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:09:10,969 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 05:09:10,969 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:09:10,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:09:10,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:09:10,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:09:10,970 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:09:10,982 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:09:10,983 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1355646324] [2020-10-27 05:09:10,983 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:09:10,983 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:09:10,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774199434] [2020-10-27 05:09:10,984 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 05:09:10,984 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:09:10,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 05:09:10,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 05:09:10,985 INFO L87 Difference]: Start difference. First operand 135 states and 193 transitions. Second operand 5 states. [2020-10-27 05:09:11,310 WARN L193 SmtUtils]: Spent 285.00 ms on a formula simplification that was a NOOP. DAG size: 126 [2020-10-27 05:09:11,942 WARN L193 SmtUtils]: Spent 275.00 ms on a formula simplification that was a NOOP. DAG size: 120 [2020-10-27 05:09:12,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:09:12,132 INFO L93 Difference]: Finished difference Result 369 states and 553 transitions. [2020-10-27 05:09:12,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 05:09:12,133 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 43 [2020-10-27 05:09:12,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:09:12,135 INFO L225 Difference]: With dead ends: 369 [2020-10-27 05:09:12,135 INFO L226 Difference]: Without dead ends: 290 [2020-10-27 05:09:12,138 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-27 05:09:12,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2020-10-27 05:09:12,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 284. [2020-10-27 05:09:12,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 284 states. [2020-10-27 05:09:12,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 420 transitions. [2020-10-27 05:09:12,189 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 420 transitions. Word has length 43 [2020-10-27 05:09:12,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:09:12,190 INFO L481 AbstractCegarLoop]: Abstraction has 284 states and 420 transitions. [2020-10-27 05:09:12,190 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 05:09:12,191 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 420 transitions. [2020-10-27 05:09:12,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-27 05:09:12,195 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:09:12,195 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] [2020-10-27 05:09:12,195 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 05:09:12,196 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:09:12,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:09:12,196 INFO L82 PathProgramCache]: Analyzing trace with hash -527350130, now seen corresponding path program 1 times [2020-10-27 05:09:12,196 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:09:12,199 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1950159162] [2020-10-27 05:09:12,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:09:12,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:09:12,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:09:12,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:09:12,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:09:12,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:09:12,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:09:12,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:09:15,358 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:09:15,359 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-27 05:09:15,359 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 05:09:15,359 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3137 [2020-10-27 05:09:15,359 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:09:15,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 05:09:15,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:09:15,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-27 05:09:15,360 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:09:15,720 WARN L193 SmtUtils]: Spent 247.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-10-27 05:09:15,721 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:09:15,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:09:15,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:09:15,748 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:09:15,749 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:09:15,749 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:09:15,749 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-27 05:09:15,749 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:09:15,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:09:15,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:09:15,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:09:15,750 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:09:15,761 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:09:15,761 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1950159162] [2020-10-27 05:09:15,762 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:09:15,762 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 05:09:15,762 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29411332] [2020-10-27 05:09:15,762 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 05:09:15,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:09:15,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 05:09:15,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-27 05:09:15,763 INFO L87 Difference]: Start difference. First operand 284 states and 420 transitions. Second operand 7 states. [2020-10-27 05:09:16,072 WARN L193 SmtUtils]: Spent 240.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-10-27 05:09:16,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:09:16,643 INFO L93 Difference]: Finished difference Result 586 states and 886 transitions. [2020-10-27 05:09:16,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 05:09:16,644 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 43 [2020-10-27 05:09:16,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:09:16,648 INFO L225 Difference]: With dead ends: 586 [2020-10-27 05:09:16,648 INFO L226 Difference]: Without dead ends: 430 [2020-10-27 05:09:16,651 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-10-27 05:09:16,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 430 states. [2020-10-27 05:09:16,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 430 to 272. [2020-10-27 05:09:16,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 272 states. [2020-10-27 05:09:16,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 403 transitions. [2020-10-27 05:09:16,695 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 403 transitions. Word has length 43 [2020-10-27 05:09:16,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:09:16,696 INFO L481 AbstractCegarLoop]: Abstraction has 272 states and 403 transitions. [2020-10-27 05:09:16,696 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 05:09:16,696 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 403 transitions. [2020-10-27 05:09:16,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-27 05:09:16,696 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:09:16,697 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] [2020-10-27 05:09:16,697 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 05:09:16,697 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:09:16,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:09:16,698 INFO L82 PathProgramCache]: Analyzing trace with hash -1407608734, now seen corresponding path program 1 times [2020-10-27 05:09:16,699 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:09:16,699 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2029723885] [2020-10-27 05:09:16,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:09:16,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:09:16,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:09:16,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:09:16,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:09:16,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:09:17,259 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:09:17,260 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-27 05:09:17,260 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 05:09:17,260 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 542 [2020-10-27 05:09:17,261 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:09:17,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:09:17,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-27 05:09:17,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-27 05:09:17,262 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 05:09:17,552 WARN L193 SmtUtils]: Spent 241.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-10-27 05:09:17,553 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:09:17,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:09:17,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:09:17,576 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:09:17,576 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:09:17,576 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:09:17,576 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-27 05:09:17,577 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:09:17,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:09:17,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:09:17,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:09:17,577 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:09:17,587 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:09:17,587 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2029723885] [2020-10-27 05:09:17,587 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:09:17,588 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 05:09:17,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494020905] [2020-10-27 05:09:17,588 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 05:09:17,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:09:17,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 05:09:17,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 05:09:17,589 INFO L87 Difference]: Start difference. First operand 272 states and 403 transitions. Second operand 4 states. [2020-10-27 05:09:17,897 WARN L193 SmtUtils]: Spent 264.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2020-10-27 05:09:18,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:09:18,331 INFO L93 Difference]: Finished difference Result 536 states and 809 transitions. [2020-10-27 05:09:18,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 05:09:18,332 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 44 [2020-10-27 05:09:18,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:09:18,335 INFO L225 Difference]: With dead ends: 536 [2020-10-27 05:09:18,335 INFO L226 Difference]: Without dead ends: 377 [2020-10-27 05:09:18,341 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 [2020-10-27 05:09:18,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2020-10-27 05:09:18,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 374. [2020-10-27 05:09:18,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 374 states. [2020-10-27 05:09:18,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 374 states to 374 states and 559 transitions. [2020-10-27 05:09:18,408 INFO L78 Accepts]: Start accepts. Automaton has 374 states and 559 transitions. Word has length 44 [2020-10-27 05:09:18,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:09:18,408 INFO L481 AbstractCegarLoop]: Abstraction has 374 states and 559 transitions. [2020-10-27 05:09:18,409 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 05:09:18,409 INFO L276 IsEmpty]: Start isEmpty. Operand 374 states and 559 transitions. [2020-10-27 05:09:18,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-27 05:09:18,409 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:09:18,409 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] [2020-10-27 05:09:18,410 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 05:09:18,410 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:09:18,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:09:18,411 INFO L82 PathProgramCache]: Analyzing trace with hash 1830756732, now seen corresponding path program 1 times [2020-10-27 05:09:18,411 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:09:18,411 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [536647621] [2020-10-27 05:09:18,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:09:18,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:09:18,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:09:18,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:09:18,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:09:18,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:09:19,407 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:09:19,407 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-27 05:09:19,407 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 05:09:19,407 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 974 [2020-10-27 05:09:19,408 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:09:19,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 05:09:19,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:09:19,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-27 05:09:19,408 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:09:19,740 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-10-27 05:09:19,741 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:09:19,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:09:19,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:09:19,779 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:09:19,780 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:09:19,780 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:09:19,780 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 29 [2020-10-27 05:09:19,780 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:09:19,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:09:19,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:09:19,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:09:19,781 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:09:19,797 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:09:19,797 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [536647621] [2020-10-27 05:09:19,797 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:09:19,798 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:09:19,798 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531962075] [2020-10-27 05:09:19,798 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 05:09:19,798 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:09:19,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 05:09:19,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:09:19,801 INFO L87 Difference]: Start difference. First operand 374 states and 559 transitions. Second operand 6 states. [2020-10-27 05:09:20,135 WARN L193 SmtUtils]: Spent 279.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-27 05:09:20,736 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification that was a NOOP. DAG size: 125 [2020-10-27 05:09:20,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:09:20,836 INFO L93 Difference]: Finished difference Result 980 states and 1483 transitions. [2020-10-27 05:09:20,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 05:09:20,837 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 45 [2020-10-27 05:09:20,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:09:20,841 INFO L225 Difference]: With dead ends: 980 [2020-10-27 05:09:20,842 INFO L226 Difference]: Without dead ends: 633 [2020-10-27 05:09:20,843 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-10-27 05:09:20,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 633 states. [2020-10-27 05:09:20,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 633 to 630. [2020-10-27 05:09:20,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 630 states. [2020-10-27 05:09:20,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 630 states to 630 states and 944 transitions. [2020-10-27 05:09:20,927 INFO L78 Accepts]: Start accepts. Automaton has 630 states and 944 transitions. Word has length 45 [2020-10-27 05:09:20,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:09:20,928 INFO L481 AbstractCegarLoop]: Abstraction has 630 states and 944 transitions. [2020-10-27 05:09:20,928 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 05:09:20,928 INFO L276 IsEmpty]: Start isEmpty. Operand 630 states and 944 transitions. [2020-10-27 05:09:20,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-27 05:09:20,928 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:09:20,929 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] [2020-10-27 05:09:20,929 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 05:09:20,929 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:09:20,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:09:20,930 INFO L82 PathProgramCache]: Analyzing trace with hash -1490247455, now seen corresponding path program 1 times [2020-10-27 05:09:20,930 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:09:20,930 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [682429524] [2020-10-27 05:09:20,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:09:20,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:09:20,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:09:20,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:09:21,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:09:21,252 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:09:21,252 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-27 05:09:21,252 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 05:09:21,252 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 304 [2020-10-27 05:09:21,253 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:09:21,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:09:21,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-27 05:09:21,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-27 05:09:21,253 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:09:21,556 WARN L193 SmtUtils]: Spent 255.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-10-27 05:09:21,557 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:09:21,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:09:21,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:09:21,570 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:09:21,570 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:09:21,570 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:09:21,571 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 05:09:21,571 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:09:21,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:09:21,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:09:21,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:09:21,571 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:09:21,582 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:09:21,582 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [682429524] [2020-10-27 05:09:21,582 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:09:21,583 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 05:09:21,583 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961392757] [2020-10-27 05:09:21,583 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 05:09:21,584 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:09:21,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 05:09:21,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 05:09:21,585 INFO L87 Difference]: Start difference. First operand 630 states and 944 transitions. Second operand 4 states. [2020-10-27 05:09:21,898 WARN L193 SmtUtils]: Spent 274.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2020-10-27 05:09:22,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:09:22,382 INFO L93 Difference]: Finished difference Result 1669 states and 2512 transitions. [2020-10-27 05:09:22,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 05:09:22,383 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 45 [2020-10-27 05:09:22,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:09:22,389 INFO L225 Difference]: With dead ends: 1669 [2020-10-27 05:09:22,390 INFO L226 Difference]: Without dead ends: 1074 [2020-10-27 05:09:22,392 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 [2020-10-27 05:09:22,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1074 states. [2020-10-27 05:09:22,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1074 to 1071. [2020-10-27 05:09:22,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1071 states. [2020-10-27 05:09:22,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1071 states to 1071 states and 1586 transitions. [2020-10-27 05:09:22,521 INFO L78 Accepts]: Start accepts. Automaton has 1071 states and 1586 transitions. Word has length 45 [2020-10-27 05:09:22,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:09:22,523 INFO L481 AbstractCegarLoop]: Abstraction has 1071 states and 1586 transitions. [2020-10-27 05:09:22,523 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 05:09:22,523 INFO L276 IsEmpty]: Start isEmpty. Operand 1071 states and 1586 transitions. [2020-10-27 05:09:22,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-27 05:09:22,524 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:09:22,524 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] [2020-10-27 05:09:22,524 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 05:09:22,524 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:09:22,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:09:22,525 INFO L82 PathProgramCache]: Analyzing trace with hash 411150415, now seen corresponding path program 1 times [2020-10-27 05:09:22,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:09:22,525 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1159928372] [2020-10-27 05:09:22,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:09:22,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:09:22,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:09:22,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:09:22,736 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:09:22,736 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-27 05:09:22,736 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 05:09:22,737 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 192 [2020-10-27 05:09:22,737 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:09:22,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:09:22,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-27 05:09:22,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-27 05:09:22,737 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:09:23,000 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-10-27 05:09:23,001 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:09:23,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:09:23,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:09:23,032 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:09:23,033 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:09:23,033 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:09:23,033 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-10-27 05:09:23,033 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:09:23,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:09:23,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:09:23,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:09:23,034 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:09:23,053 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:09:23,053 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1159928372] [2020-10-27 05:09:23,053 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:09:23,053 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 05:09:23,054 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793182131] [2020-10-27 05:09:23,058 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 05:09:23,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:09:23,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 05:09:23,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 05:09:23,059 INFO L87 Difference]: Start difference. First operand 1071 states and 1586 transitions. Second operand 4 states. [2020-10-27 05:09:23,363 WARN L193 SmtUtils]: Spent 263.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2020-10-27 05:09:23,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:09:23,917 INFO L93 Difference]: Finished difference Result 2849 states and 4206 transitions. [2020-10-27 05:09:23,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 05:09:23,918 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 46 [2020-10-27 05:09:23,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:09:23,927 INFO L225 Difference]: With dead ends: 2849 [2020-10-27 05:09:23,928 INFO L226 Difference]: Without dead ends: 1815 [2020-10-27 05:09:23,931 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 [2020-10-27 05:09:23,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1815 states. [2020-10-27 05:09:24,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1815 to 1800. [2020-10-27 05:09:24,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1800 states. [2020-10-27 05:09:24,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1800 states to 1800 states and 2607 transitions. [2020-10-27 05:09:24,175 INFO L78 Accepts]: Start accepts. Automaton has 1800 states and 2607 transitions. Word has length 46 [2020-10-27 05:09:24,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:09:24,176 INFO L481 AbstractCegarLoop]: Abstraction has 1800 states and 2607 transitions. [2020-10-27 05:09:24,176 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 05:09:24,176 INFO L276 IsEmpty]: Start isEmpty. Operand 1800 states and 2607 transitions. [2020-10-27 05:09:24,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-27 05:09:24,176 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:09:24,177 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] [2020-10-27 05:09:24,177 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 05:09:24,177 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:09:24,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:09:24,178 INFO L82 PathProgramCache]: Analyzing trace with hash -1639759275, now seen corresponding path program 1 times [2020-10-27 05:09:24,178 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:09:24,178 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [994114788] [2020-10-27 05:09:24,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:09:24,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:09:24,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:09:24,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:09:24,480 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:09:24,480 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-27 05:09:24,480 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 05:09:24,481 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 283 [2020-10-27 05:09:24,481 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:09:24,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 05:09:24,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:09:24,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-27 05:09:24,481 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:09:24,818 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-10-27 05:09:24,819 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:09:24,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:09:24,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:09:24,847 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:09:24,847 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:09:24,847 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:09:24,847 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-27 05:09:24,847 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:09:24,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:09:24,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:09:24,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:09:24,848 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:09:24,864 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:09:24,865 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [994114788] [2020-10-27 05:09:24,865 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:09:24,865 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:09:24,865 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126684265] [2020-10-27 05:09:24,866 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 05:09:24,866 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:09:24,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 05:09:24,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:09:24,867 INFO L87 Difference]: Start difference. First operand 1800 states and 2607 transitions. Second operand 6 states. [2020-10-27 05:09:25,188 WARN L193 SmtUtils]: Spent 264.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-27 05:09:25,841 WARN L193 SmtUtils]: Spent 282.00 ms on a formula simplification that was a NOOP. DAG size: 125 [2020-10-27 05:09:26,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:09:26,317 INFO L93 Difference]: Finished difference Result 5314 states and 7699 transitions. [2020-10-27 05:09:26,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 05:09:26,318 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 47 [2020-10-27 05:09:26,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:09:26,337 INFO L225 Difference]: With dead ends: 5314 [2020-10-27 05:09:26,337 INFO L226 Difference]: Without dead ends: 3539 [2020-10-27 05:09:26,342 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-10-27 05:09:26,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3539 states. [2020-10-27 05:09:26,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3539 to 3536. [2020-10-27 05:09:26,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3536 states. [2020-10-27 05:09:26,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3536 states to 3536 states and 5079 transitions. [2020-10-27 05:09:26,770 INFO L78 Accepts]: Start accepts. Automaton has 3536 states and 5079 transitions. Word has length 47 [2020-10-27 05:09:26,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:09:26,771 INFO L481 AbstractCegarLoop]: Abstraction has 3536 states and 5079 transitions. [2020-10-27 05:09:26,771 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 05:09:26,771 INFO L276 IsEmpty]: Start isEmpty. Operand 3536 states and 5079 transitions. [2020-10-27 05:09:26,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-27 05:09:26,771 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:09:26,771 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] [2020-10-27 05:09:26,772 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 05:09:26,772 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:09:26,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:09:26,772 INFO L82 PathProgramCache]: Analyzing trace with hash -867895622, now seen corresponding path program 1 times [2020-10-27 05:09:26,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:09:26,773 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1530859103] [2020-10-27 05:09:26,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:09:26,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:09:26,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:09:26,911 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:09:26,911 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-27 05:09:26,911 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:09:26,912 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 96 [2020-10-27 05:09:26,912 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:09:26,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 05:09:26,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 48 [2020-10-27 05:09:26,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-27 05:09:26,912 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:09:27,210 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-10-27 05:09:27,211 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:09:27,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:09:27,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:09:27,225 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:09:27,225 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:09:27,225 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:09:27,225 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 05:09:27,226 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:09:27,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:09:27,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:09:27,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:09:27,226 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:09:27,234 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:09:27,235 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1530859103] [2020-10-27 05:09:27,235 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:09:27,235 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:09:27,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273450414] [2020-10-27 05:09:27,236 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 05:09:27,236 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:09:27,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 05:09:27,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 05:09:27,237 INFO L87 Difference]: Start difference. First operand 3536 states and 5079 transitions. Second operand 5 states. [2020-10-27 05:09:28,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:09:28,240 INFO L93 Difference]: Finished difference Result 5777 states and 8271 transitions. [2020-10-27 05:09:28,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 05:09:28,241 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 47 [2020-10-27 05:09:28,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:09:28,266 INFO L225 Difference]: With dead ends: 5777 [2020-10-27 05:09:28,267 INFO L226 Difference]: Without dead ends: 5774 [2020-10-27 05:09:28,269 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 [2020-10-27 05:09:28,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5774 states. [2020-10-27 05:09:28,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5774 to 3664. [2020-10-27 05:09:28,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3664 states. [2020-10-27 05:09:28,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3664 states to 3664 states and 5167 transitions. [2020-10-27 05:09:28,712 INFO L78 Accepts]: Start accepts. Automaton has 3664 states and 5167 transitions. Word has length 47 [2020-10-27 05:09:28,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:09:28,712 INFO L481 AbstractCegarLoop]: Abstraction has 3664 states and 5167 transitions. [2020-10-27 05:09:28,712 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 05:09:28,712 INFO L276 IsEmpty]: Start isEmpty. Operand 3664 states and 5167 transitions. [2020-10-27 05:09:28,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-27 05:09:28,714 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:09:28,714 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-27 05:09:28,714 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 05:09:28,714 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:09:28,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:09:28,715 INFO L82 PathProgramCache]: Analyzing trace with hash -1244027673, now seen corresponding path program 1 times [2020-10-27 05:09:28,715 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:09:28,715 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1732504308] [2020-10-27 05:09:28,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:09:28,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:09:28,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:09:28,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:09:28,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:09:28,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:09:29,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:09:32,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:09:32,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:09:32,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:09:33,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:09:33,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:09:33,748 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:09:33,748 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-27 05:09:33,748 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-27 05:09:33,748 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-27 05:09:33,749 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:09:33,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 05:09:33,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:09:33,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-27 05:09:33,749 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:09:34,378 WARN L193 SmtUtils]: Spent 263.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-10-27 05:09:34,379 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:09:34,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:09:34,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:09:34,404 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:09:34,405 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:09:34,405 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:09:34,405 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-27 05:09:34,405 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:09:34,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:09:34,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:09:34,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:09:34,406 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:09:34,440 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:09:34,440 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1732504308] [2020-10-27 05:09:34,441 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 05:09:34,441 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 05:09:34,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729222972] [2020-10-27 05:09:34,441 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 05:09:34,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:09:34,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 05:09:34,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2020-10-27 05:09:34,443 INFO L87 Difference]: Start difference. First operand 3664 states and 5167 transitions. Second operand 13 states. [2020-10-27 05:09:35,303 WARN L193 SmtUtils]: Spent 704.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 134 [2020-10-27 05:09:36,017 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2020-10-27 05:09:36,151 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 31 [2020-10-27 05:09:36,336 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2020-10-27 05:09:36,578 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2020-10-27 05:09:37,305 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2020-10-27 05:09:37,519 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 34 [2020-10-27 05:09:37,836 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2020-10-27 05:09:38,003 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 31 [2020-10-27 05:09:38,254 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 34 [2020-10-27 05:09:38,513 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 34 [2020-10-27 05:09:39,429 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-10-27 05:09:40,722 WARN L193 SmtUtils]: Spent 706.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 137 [2020-10-27 05:09:41,114 WARN L193 SmtUtils]: Spent 318.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-10-27 05:09:41,888 WARN L193 SmtUtils]: Spent 704.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 132 [2020-10-27 05:09:42,312 WARN L193 SmtUtils]: Spent 320.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2020-10-27 05:09:43,427 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 45 [2020-10-27 05:09:43,726 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 34 [2020-10-27 05:09:43,922 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-10-27 05:09:44,188 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-10-27 05:09:44,532 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2020-10-27 05:09:44,705 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 40 [2020-10-27 05:09:45,050 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2020-10-27 05:09:46,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:09:46,950 INFO L93 Difference]: Finished difference Result 21503 states and 29555 transitions. [2020-10-27 05:09:46,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2020-10-27 05:09:46,951 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 65 [2020-10-27 05:09:46,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:09:47,021 INFO L225 Difference]: With dead ends: 21503 [2020-10-27 05:09:47,021 INFO L226 Difference]: Without dead ends: 17864 [2020-10-27 05:09:47,034 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1914 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=1119, Invalid=4431, Unknown=0, NotChecked=0, Total=5550 [2020-10-27 05:09:47,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17864 states. [2020-10-27 05:09:48,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17864 to 8380. [2020-10-27 05:09:48,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8380 states. [2020-10-27 05:09:48,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8380 states to 8380 states and 11727 transitions. [2020-10-27 05:09:48,299 INFO L78 Accepts]: Start accepts. Automaton has 8380 states and 11727 transitions. Word has length 65 [2020-10-27 05:09:48,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:09:48,300 INFO L481 AbstractCegarLoop]: Abstraction has 8380 states and 11727 transitions. [2020-10-27 05:09:48,300 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 05:09:48,300 INFO L276 IsEmpty]: Start isEmpty. Operand 8380 states and 11727 transitions. [2020-10-27 05:09:48,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-27 05:09:48,302 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:09:48,302 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-27 05:09:48,302 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 05:09:48,302 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:09:48,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:09:48,303 INFO L82 PathProgramCache]: Analyzing trace with hash -507925791, now seen corresponding path program 1 times [2020-10-27 05:09:48,303 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:09:48,303 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1782310320] [2020-10-27 05:09:48,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:09:48,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:09:48,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:09:48,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:09:48,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:09:48,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:09:48,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:09:48,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:09:52,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:09:53,364 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:09:53,364 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-27 05:09:53,365 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 05:09:53,365 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5038 [2020-10-27 05:09:53,365 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:09:53,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 05:09:53,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:09:53,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-27 05:09:53,366 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:09:53,864 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-10-27 05:09:53,865 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:09:53,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:09:53,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:09:53,890 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:09:53,891 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:09:53,891 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:09:53,891 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-27 05:09:53,891 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:09:53,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:09:53,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:09:53,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:09:53,892 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:09:53,914 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:09:53,914 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1782310320] [2020-10-27 05:09:53,914 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 05:09:53,914 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 05:09:53,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80352494] [2020-10-27 05:09:53,915 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 05:09:53,915 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:09:53,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 05:09:53,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-10-27 05:09:53,916 INFO L87 Difference]: Start difference. First operand 8380 states and 11727 transitions. Second operand 11 states. [2020-10-27 05:09:54,376 WARN L193 SmtUtils]: Spent 344.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-27 05:09:56,169 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 27 [2020-10-27 05:09:56,338 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 27 [2020-10-27 05:09:56,516 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 27 [2020-10-27 05:09:57,091 WARN L193 SmtUtils]: Spent 317.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2020-10-27 05:09:57,529 WARN L193 SmtUtils]: Spent 343.00 ms on a formula simplification that was a NOOP. DAG size: 132 [2020-10-27 05:09:57,853 WARN L193 SmtUtils]: Spent 281.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2020-10-27 05:09:58,950 WARN L193 SmtUtils]: Spent 293.00 ms on a formula simplification that was a NOOP. DAG size: 126 [2020-10-27 05:10:01,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:10:01,291 INFO L93 Difference]: Finished difference Result 30518 states and 42447 transitions. [2020-10-27 05:10:01,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-27 05:10:01,291 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 65 [2020-10-27 05:10:01,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:10:01,342 INFO L225 Difference]: With dead ends: 30518 [2020-10-27 05:10:01,343 INFO L226 Difference]: Without dead ends: 25192 [2020-10-27 05:10:01,357 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=256, Invalid=800, Unknown=0, NotChecked=0, Total=1056 [2020-10-27 05:10:01,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25192 states. [2020-10-27 05:10:03,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25192 to 13176. [2020-10-27 05:10:03,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13176 states. [2020-10-27 05:10:03,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13176 states to 13176 states and 18382 transitions. [2020-10-27 05:10:03,234 INFO L78 Accepts]: Start accepts. Automaton has 13176 states and 18382 transitions. Word has length 65 [2020-10-27 05:10:03,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:10:03,234 INFO L481 AbstractCegarLoop]: Abstraction has 13176 states and 18382 transitions. [2020-10-27 05:10:03,234 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 05:10:03,234 INFO L276 IsEmpty]: Start isEmpty. Operand 13176 states and 18382 transitions. [2020-10-27 05:10:03,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-27 05:10:03,236 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:10:03,237 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-27 05:10:03,237 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 05:10:03,237 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:10:03,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:10:03,238 INFO L82 PathProgramCache]: Analyzing trace with hash 92571501, now seen corresponding path program 1 times [2020-10-27 05:10:03,238 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:10:03,238 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1161751340] [2020-10-27 05:10:03,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:10:03,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:10:03,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:10:03,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:10:03,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:10:03,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:10:03,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:10:03,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:10:04,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:10:04,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:10:04,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:10:04,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:10:04,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:10:04,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:10:05,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:10:08,264 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:10:08,265 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-27 05:10:08,265 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-27 05:10:08,265 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-27 05:10:08,265 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:10:08,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 05:10:08,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:10:08,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-27 05:10:08,266 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:10:08,881 WARN L193 SmtUtils]: Spent 381.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-10-27 05:10:08,882 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:10:08,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:10:08,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:10:08,911 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:10:08,912 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:10:08,912 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:10:08,912 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-27 05:10:08,913 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:10:08,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:10:08,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:10:08,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:10:08,914 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 05:10:08,957 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:10:08,957 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1161751340] [2020-10-27 05:10:08,960 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 05:10:08,960 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 05:10:08,961 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420184365] [2020-10-27 05:10:08,961 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 05:10:08,961 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:10:08,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 05:10:08,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-10-27 05:10:08,964 INFO L87 Difference]: Start difference. First operand 13176 states and 18382 transitions. Second operand 11 states. [2020-10-27 05:10:09,751 WARN L193 SmtUtils]: Spent 610.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 130 [2020-10-27 05:10:12,467 WARN L193 SmtUtils]: Spent 613.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 126 [2020-10-27 05:10:12,858 WARN L193 SmtUtils]: Spent 304.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2020-10-27 05:10:13,655 WARN L193 SmtUtils]: Spent 752.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 128 [2020-10-27 05:10:16,316 WARN L193 SmtUtils]: Spent 588.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 125 [2020-10-27 05:10:20,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:10:20,413 INFO L93 Difference]: Finished difference Result 49146 states and 67701 transitions. [2020-10-27 05:10:20,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-27 05:10:20,414 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 65 [2020-10-27 05:10:20,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:10:20,484 INFO L225 Difference]: With dead ends: 49146 [2020-10-27 05:10:20,485 INFO L226 Difference]: Without dead ends: 35995 [2020-10-27 05:10:20,516 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 575 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=459, Invalid=1521, Unknown=0, NotChecked=0, Total=1980 [2020-10-27 05:10:20,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35995 states. [2020-10-27 05:10:22,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35995 to 14040. [2020-10-27 05:10:22,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14040 states. [2020-10-27 05:10:22,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14040 states to 14040 states and 19489 transitions. [2020-10-27 05:10:22,968 INFO L78 Accepts]: Start accepts. Automaton has 14040 states and 19489 transitions. Word has length 65 [2020-10-27 05:10:22,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:10:22,969 INFO L481 AbstractCegarLoop]: Abstraction has 14040 states and 19489 transitions. [2020-10-27 05:10:22,969 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 05:10:22,969 INFO L276 IsEmpty]: Start isEmpty. Operand 14040 states and 19489 transitions. [2020-10-27 05:10:22,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-27 05:10:22,971 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:10:22,971 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-27 05:10:22,971 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-27 05:10:22,971 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:10:22,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:10:22,971 INFO L82 PathProgramCache]: Analyzing trace with hash 1376897103, now seen corresponding path program 1 times [2020-10-27 05:10:22,972 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:10:22,972 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1864911639] [2020-10-27 05:10:22,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:10:22,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:10:22,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:10:23,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:10:23,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:10:23,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:10:24,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:10:25,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:10:27,992 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:10:27,992 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-27 05:10:27,992 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 05:10:27,992 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-27 05:10:27,993 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:10:27,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 05:10:27,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:10:27,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-27 05:10:27,993 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:10:28,461 WARN L193 SmtUtils]: Spent 236.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-10-27 05:10:28,461 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:10:28,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:10:28,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:10:28,487 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:10:28,487 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:10:28,488 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:10:28,488 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-27 05:10:28,489 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:10:28,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:10:28,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:10:28,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:10:28,490 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 05:10:28,515 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:10:28,516 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1864911639] [2020-10-27 05:10:28,519 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 05:10:28,519 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 05:10:28,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978975504] [2020-10-27 05:10:28,520 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 05:10:28,520 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:10:28,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 05:10:28,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-10-27 05:10:28,521 INFO L87 Difference]: Start difference. First operand 14040 states and 19489 transitions. Second operand 11 states. [2020-10-27 05:10:28,948 WARN L193 SmtUtils]: Spent 332.00 ms on a formula simplification that was a NOOP. DAG size: 131 [2020-10-27 05:10:31,886 WARN L193 SmtUtils]: Spent 317.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-27 05:10:32,212 WARN L193 SmtUtils]: Spent 294.00 ms on a formula simplification that was a NOOP. DAG size: 125 [2020-10-27 05:10:32,576 WARN L193 SmtUtils]: Spent 329.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2020-10-27 05:10:39,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:10:39,184 INFO L93 Difference]: Finished difference Result 56570 states and 77687 transitions. [2020-10-27 05:10:39,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-27 05:10:39,185 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 66 [2020-10-27 05:10:39,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:10:39,257 INFO L225 Difference]: With dead ends: 56570 [2020-10-27 05:10:39,258 INFO L226 Difference]: Without dead ends: 42555 [2020-10-27 05:10:39,288 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 391 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=380, Invalid=1180, Unknown=0, NotChecked=0, Total=1560 [2020-10-27 05:10:39,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42555 states. [2020-10-27 05:10:43,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42555 to 23152. [2020-10-27 05:10:43,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23152 states. [2020-10-27 05:10:43,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23152 states to 23152 states and 31996 transitions. [2020-10-27 05:10:43,390 INFO L78 Accepts]: Start accepts. Automaton has 23152 states and 31996 transitions. Word has length 66 [2020-10-27 05:10:43,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:10:43,390 INFO L481 AbstractCegarLoop]: Abstraction has 23152 states and 31996 transitions. [2020-10-27 05:10:43,390 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 05:10:43,390 INFO L276 IsEmpty]: Start isEmpty. Operand 23152 states and 31996 transitions. [2020-10-27 05:10:43,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-27 05:10:43,392 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:10:43,392 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-27 05:10:43,392 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-27 05:10:43,392 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:10:43,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:10:43,393 INFO L82 PathProgramCache]: Analyzing trace with hash -381624115, now seen corresponding path program 1 times [2020-10-27 05:10:43,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:10:43,393 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [331072947] [2020-10-27 05:10:43,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:10:43,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:10:43,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:10:43,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:10:43,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:10:43,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:10:43,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:10:44,801 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:10:44,801 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-27 05:10:44,801 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 05:10:44,801 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1394 [2020-10-27 05:10:44,801 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:10:44,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 05:10:44,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 05:10:44,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-27 05:10:44,802 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:10:45,457 WARN L193 SmtUtils]: Spent 248.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-10-27 05:10:45,458 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:10:45,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:10:45,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:10:45,467 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:10:45,468 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:10:45,468 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:10:45,468 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 05:10:45,468 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:10:45,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:10:45,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:10:45,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:10:45,468 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:10:45,484 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:10:45,484 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [331072947] [2020-10-27 05:10:45,485 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 05:10:45,485 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 05:10:45,485 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446177339] [2020-10-27 05:10:45,485 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 05:10:45,485 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:10:45,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 05:10:45,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-27 05:10:45,486 INFO L87 Difference]: Start difference. First operand 23152 states and 31996 transitions. Second operand 10 states. [2020-10-27 05:10:45,876 WARN L193 SmtUtils]: Spent 318.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2020-10-27 05:10:48,216 WARN L193 SmtUtils]: Spent 335.00 ms on a formula simplification that was a NOOP. DAG size: 132 [2020-10-27 05:10:48,572 WARN L193 SmtUtils]: Spent 298.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-10-27 05:10:48,955 WARN L193 SmtUtils]: Spent 346.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2020-10-27 05:10:57,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:10:57,279 INFO L93 Difference]: Finished difference Result 67996 states and 93132 transitions. [2020-10-27 05:10:57,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-27 05:10:57,280 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 67 [2020-10-27 05:10:57,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:10:57,348 INFO L225 Difference]: With dead ends: 67996 [2020-10-27 05:10:57,349 INFO L226 Difference]: Without dead ends: 44869 [2020-10-27 05:10:57,393 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=231, Invalid=699, Unknown=0, NotChecked=0, Total=930 [2020-10-27 05:10:57,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44869 states. [2020-10-27 05:11:02,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44869 to 23620. [2020-10-27 05:11:02,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23620 states. [2020-10-27 05:11:02,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23620 states to 23620 states and 32698 transitions. [2020-10-27 05:11:02,089 INFO L78 Accepts]: Start accepts. Automaton has 23620 states and 32698 transitions. Word has length 67 [2020-10-27 05:11:02,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:11:02,089 INFO L481 AbstractCegarLoop]: Abstraction has 23620 states and 32698 transitions. [2020-10-27 05:11:02,089 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 05:11:02,089 INFO L276 IsEmpty]: Start isEmpty. Operand 23620 states and 32698 transitions. [2020-10-27 05:11:02,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-27 05:11:02,091 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:11:02,092 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-27 05:11:02,092 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-27 05:11:02,092 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:11:02,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:11:02,092 INFO L82 PathProgramCache]: Analyzing trace with hash -540032142, now seen corresponding path program 1 times [2020-10-27 05:11:02,092 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:11:02,093 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [100105366] [2020-10-27 05:11:02,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:11:02,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:11:02,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:02,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:02,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:02,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:02,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:04,280 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:11:04,281 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-27 05:11:04,281 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 05:11:04,281 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2175 [2020-10-27 05:11:04,281 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:11:04,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 05:11:04,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 05:11:04,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-27 05:11:04,282 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:11:04,806 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-10-27 05:11:04,807 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:11:04,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:11:04,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:04,818 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:11:04,818 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:11:04,818 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:11:04,819 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 05:11:04,819 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:11:04,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:11:04,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:11:04,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:11:04,819 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:11:04,837 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:11:04,837 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [100105366] [2020-10-27 05:11:04,838 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 05:11:04,838 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 05:11:04,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678780846] [2020-10-27 05:11:04,838 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 05:11:04,838 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:11:04,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 05:11:04,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-27 05:11:04,839 INFO L87 Difference]: Start difference. First operand 23620 states and 32698 transitions. Second operand 10 states. [2020-10-27 05:11:05,228 WARN L193 SmtUtils]: Spent 321.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2020-10-27 05:11:05,666 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 37 [2020-10-27 05:11:05,831 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 40 [2020-10-27 05:11:06,005 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 40 [2020-10-27 05:11:06,216 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 40 [2020-10-27 05:11:07,293 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 43 [2020-10-27 05:11:07,486 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 43 [2020-10-27 05:11:07,727 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 43 [2020-10-27 05:11:08,890 WARN L193 SmtUtils]: Spent 735.00 ms on a formula simplification. DAG size of input: 144 DAG size of output: 138 [2020-10-27 05:11:09,230 WARN L193 SmtUtils]: Spent 310.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2020-10-27 05:11:09,999 WARN L193 SmtUtils]: Spent 709.00 ms on a formula simplification. DAG size of input: 142 DAG size of output: 136 [2020-10-27 05:11:16,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:11:16,285 INFO L93 Difference]: Finished difference Result 48732 states and 67478 transitions. [2020-10-27 05:11:16,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-27 05:11:16,285 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 67 [2020-10-27 05:11:16,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:11:16,332 INFO L225 Difference]: With dead ends: 48732 [2020-10-27 05:11:16,332 INFO L226 Difference]: Without dead ends: 33777 [2020-10-27 05:11:16,352 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=182, Invalid=574, Unknown=0, NotChecked=0, Total=756 [2020-10-27 05:11:16,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33777 states. [2020-10-27 05:11:21,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33777 to 23664. [2020-10-27 05:11:21,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23664 states. [2020-10-27 05:11:21,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23664 states to 23664 states and 32774 transitions. [2020-10-27 05:11:21,154 INFO L78 Accepts]: Start accepts. Automaton has 23664 states and 32774 transitions. Word has length 67 [2020-10-27 05:11:21,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:11:21,154 INFO L481 AbstractCegarLoop]: Abstraction has 23664 states and 32774 transitions. [2020-10-27 05:11:21,154 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 05:11:21,154 INFO L276 IsEmpty]: Start isEmpty. Operand 23664 states and 32774 transitions. [2020-10-27 05:11:21,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-27 05:11:21,156 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:11:21,156 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-27 05:11:21,157 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-27 05:11:21,157 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:11:21,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:11:21,157 INFO L82 PathProgramCache]: Analyzing trace with hash 1033555212, now seen corresponding path program 1 times [2020-10-27 05:11:21,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:11:21,157 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [118619523] [2020-10-27 05:11:21,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:11:21,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:11:21,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:21,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:21,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:21,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:21,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:23,976 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:11:23,976 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-27 05:11:23,976 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 05:11:23,976 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2804 [2020-10-27 05:11:23,976 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:11:23,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 05:11:23,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 05:11:23,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-27 05:11:23,977 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:11:24,318 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 18 [2020-10-27 05:11:24,659 WARN L193 SmtUtils]: Spent 261.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-10-27 05:11:24,660 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:11:24,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:11:24,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:24,674 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:11:24,674 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:11:24,674 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:11:24,675 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 05:11:24,675 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:11:24,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:11:24,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:11:24,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:11:24,675 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:11:24,694 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:11:24,695 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [118619523] [2020-10-27 05:11:24,695 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 05:11:24,695 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 05:11:24,695 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021379496] [2020-10-27 05:11:24,696 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 05:11:24,696 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:11:24,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 05:11:24,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-10-27 05:11:24,697 INFO L87 Difference]: Start difference. First operand 23664 states and 32774 transitions. Second operand 10 states. [2020-10-27 05:11:25,194 WARN L193 SmtUtils]: Spent 314.00 ms on a formula simplification that was a NOOP. DAG size: 131 [2020-10-27 05:11:27,700 WARN L193 SmtUtils]: Spent 305.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2020-10-27 05:11:28,018 WARN L193 SmtUtils]: Spent 287.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2020-10-27 05:11:28,366 WARN L193 SmtUtils]: Spent 312.00 ms on a formula simplification that was a NOOP. DAG size: 132 [2020-10-27 05:11:38,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:11:38,120 INFO L93 Difference]: Finished difference Result 67460 states and 92836 transitions. [2020-10-27 05:11:38,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-27 05:11:38,120 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 67 [2020-10-27 05:11:38,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:11:38,175 INFO L225 Difference]: With dead ends: 67460 [2020-10-27 05:11:38,175 INFO L226 Difference]: Without dead ends: 43821 [2020-10-27 05:11:38,194 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=214, Invalid=656, Unknown=0, NotChecked=0, Total=870 [2020-10-27 05:11:38,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43821 states. [2020-10-27 05:11:43,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43821 to 24084. [2020-10-27 05:11:43,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24084 states. [2020-10-27 05:11:43,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24084 states to 24084 states and 33404 transitions. [2020-10-27 05:11:43,482 INFO L78 Accepts]: Start accepts. Automaton has 24084 states and 33404 transitions. Word has length 67 [2020-10-27 05:11:43,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:11:43,482 INFO L481 AbstractCegarLoop]: Abstraction has 24084 states and 33404 transitions. [2020-10-27 05:11:43,482 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 05:11:43,482 INFO L276 IsEmpty]: Start isEmpty. Operand 24084 states and 33404 transitions. [2020-10-27 05:11:43,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-27 05:11:43,484 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:11:43,484 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-27 05:11:43,485 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-27 05:11:43,485 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:11:43,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:11:43,485 INFO L82 PathProgramCache]: Analyzing trace with hash -1940994994, now seen corresponding path program 1 times [2020-10-27 05:11:43,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:11:43,486 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [736251478] [2020-10-27 05:11:43,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:11:43,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:11:43,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:43,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:43,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:43,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:43,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:43,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:44,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:44,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:44,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:45,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:48,052 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:11:48,052 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-27 05:11:48,052 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-27 05:11:48,052 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4552 [2020-10-27 05:11:48,053 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:11:48,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 05:11:48,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:11:48,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-27 05:11:48,053 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:11:48,471 WARN L193 SmtUtils]: Spent 262.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-10-27 05:11:48,472 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:11:48,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:11:48,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:48,492 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:11:48,492 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:11:48,492 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:11:48,492 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-27 05:11:48,493 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:11:48,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:11:48,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:11:48,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:11:48,493 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:11:48,508 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:11:48,508 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [736251478] [2020-10-27 05:11:48,508 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 05:11:48,508 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 05:11:48,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301307908] [2020-10-27 05:11:48,509 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 05:11:48,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:11:48,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 05:11:48,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-10-27 05:11:48,510 INFO L87 Difference]: Start difference. First operand 24084 states and 33404 transitions. Second operand 9 states. [2020-10-27 05:11:48,832 WARN L193 SmtUtils]: Spent 260.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2020-10-27 05:11:50,070 WARN L193 SmtUtils]: Spent 298.00 ms on a formula simplification that was a NOOP. DAG size: 125 [2020-10-27 05:11:50,398 WARN L193 SmtUtils]: Spent 285.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-10-27 05:11:56,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:11:56,982 INFO L93 Difference]: Finished difference Result 51449 states and 70935 transitions. [2020-10-27 05:11:56,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 05:11:56,983 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 68 [2020-10-27 05:11:56,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:11:57,014 INFO L225 Difference]: With dead ends: 51449 [2020-10-27 05:11:57,015 INFO L226 Difference]: Without dead ends: 27390 [2020-10-27 05:11:57,036 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=105, Invalid=275, Unknown=0, NotChecked=0, Total=380 [2020-10-27 05:11:57,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27390 states. [2020-10-27 05:12:01,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27390 to 19986. [2020-10-27 05:12:01,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19986 states. [2020-10-27 05:12:01,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19986 states to 19986 states and 27038 transitions. [2020-10-27 05:12:01,553 INFO L78 Accepts]: Start accepts. Automaton has 19986 states and 27038 transitions. Word has length 68 [2020-10-27 05:12:01,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:12:01,553 INFO L481 AbstractCegarLoop]: Abstraction has 19986 states and 27038 transitions. [2020-10-27 05:12:01,553 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 05:12:01,553 INFO L276 IsEmpty]: Start isEmpty. Operand 19986 states and 27038 transitions. [2020-10-27 05:12:01,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-27 05:12:01,556 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:12:01,556 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-27 05:12:01,556 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-27 05:12:01,556 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:12:01,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:12:01,557 INFO L82 PathProgramCache]: Analyzing trace with hash -1959751902, now seen corresponding path program 1 times [2020-10-27 05:12:01,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:12:01,557 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [829345884] [2020-10-27 05:12:01,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:12:01,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:12:01,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:01,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:01,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:01,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:01,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:01,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:01,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:03,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:03,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:06,564 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:12:06,565 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-27 05:12:06,565 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-27 05:12:06,565 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4991 [2020-10-27 05:12:06,565 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:12:06,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 05:12:06,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:12:06,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-27 05:12:06,566 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:12:07,129 WARN L193 SmtUtils]: Spent 262.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-10-27 05:12:07,130 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:12:07,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:12:07,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:07,146 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:12:07,146 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:12:07,146 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:12:07,146 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 05:12:07,147 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:12:07,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:12:07,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:12:07,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:12:07,147 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:12:07,160 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:12:07,161 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [829345884] [2020-10-27 05:12:07,161 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 05:12:07,161 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 05:12:07,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874138405] [2020-10-27 05:12:07,161 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 05:12:07,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:12:07,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 05:12:07,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2020-10-27 05:12:07,162 INFO L87 Difference]: Start difference. First operand 19986 states and 27038 transitions. Second operand 11 states. [2020-10-27 05:12:07,536 WARN L193 SmtUtils]: Spent 297.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-10-27 05:12:08,763 WARN L193 SmtUtils]: Spent 283.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2020-10-27 05:12:09,471 WARN L193 SmtUtils]: Spent 659.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 131 [2020-10-27 05:12:10,990 WARN L193 SmtUtils]: Spent 307.00 ms on a formula simplification that was a NOOP. DAG size: 126 [2020-10-27 05:12:13,909 WARN L193 SmtUtils]: Spent 331.00 ms on a formula simplification that was a NOOP. DAG size: 131 [2020-10-27 05:12:17,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:12:17,583 INFO L93 Difference]: Finished difference Result 46970 states and 63383 transitions. [2020-10-27 05:12:17,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-27 05:12:17,583 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 68 [2020-10-27 05:12:17,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:12:17,612 INFO L225 Difference]: With dead ends: 46970 [2020-10-27 05:12:17,612 INFO L226 Difference]: Without dead ends: 27009 [2020-10-27 05:12:17,626 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=183, Invalid=573, Unknown=0, NotChecked=0, Total=756 [2020-10-27 05:12:17,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27009 states. [2020-10-27 05:12:22,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27009 to 22412. [2020-10-27 05:12:22,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22412 states. [2020-10-27 05:12:22,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22412 states to 22412 states and 30139 transitions. [2020-10-27 05:12:22,488 INFO L78 Accepts]: Start accepts. Automaton has 22412 states and 30139 transitions. Word has length 68 [2020-10-27 05:12:22,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:12:22,489 INFO L481 AbstractCegarLoop]: Abstraction has 22412 states and 30139 transitions. [2020-10-27 05:12:22,489 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 05:12:22,489 INFO L276 IsEmpty]: Start isEmpty. Operand 22412 states and 30139 transitions. [2020-10-27 05:12:22,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-27 05:12:22,490 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:12:22,490 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-27 05:12:22,491 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-27 05:12:22,491 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:12:22,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:12:22,491 INFO L82 PathProgramCache]: Analyzing trace with hash 2124385909, now seen corresponding path program 1 times [2020-10-27 05:12:22,491 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:12:22,492 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2075596305] [2020-10-27 05:12:22,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:12:22,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:12:22,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:22,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:22,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:22,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:22,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:22,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:23,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:23,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:23,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:26,125 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:12:26,125 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-27 05:12:26,125 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-27 05:12:26,125 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3616 [2020-10-27 05:12:26,125 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:12:26,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-27 05:12:26,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:12:26,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-27 05:12:26,126 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0