/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=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.3 --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.7.1.ufo.BOUNDED-14.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-29 13:29:43,166 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-29 13:29:43,169 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-29 13:29:43,207 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-29 13:29:43,208 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-29 13:29:43,210 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-29 13:29:43,211 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-29 13:29:43,214 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-29 13:29:43,216 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-29 13:29:43,218 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-29 13:29:43,219 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-29 13:29:43,221 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-29 13:29:43,221 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-29 13:29:43,223 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-29 13:29:43,224 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-29 13:29:43,226 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-29 13:29:43,227 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-29 13:29:43,228 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-29 13:29:43,231 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-29 13:29:43,233 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-29 13:29:43,235 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-29 13:29:43,237 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-29 13:29:43,239 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-29 13:29:43,240 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-29 13:29:43,248 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-29 13:29:43,248 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-29 13:29:43,248 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-29 13:29:43,250 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-29 13:29:43,250 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-29 13:29:43,252 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-29 13:29:43,252 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-29 13:29:43,254 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-29 13:29:43,255 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-29 13:29:43,256 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-29 13:29:43,258 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-29 13:29:43,258 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-29 13:29:43,259 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-29 13:29:43,260 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-29 13:29:43,283 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-29 13:29:43,285 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-29 13:29:43,289 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-29 13:29:43,294 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 [2020-10-29 13:29:43,344 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-29 13:29:43,344 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-29 13:29:43,346 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-29 13:29:43,346 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-29 13:29:43,346 INFO L138 SettingsManager]: * Use SBE=true [2020-10-29 13:29:43,346 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-29 13:29:43,347 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-29 13:29:43,347 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-29 13:29:43,347 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-29 13:29:43,348 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-29 13:29:43,348 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-29 13:29:43,348 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-29 13:29:43,348 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-29 13:29:43,349 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-29 13:29:43,349 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-29 13:29:43,349 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-29 13:29:43,349 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-29 13:29:43,350 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-29 13:29:43,350 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-29 13:29:43,350 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-29 13:29:43,351 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-29 13:29:43,351 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 13:29:43,351 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-29 13:29:43,352 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-29 13:29:43,352 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-29 13:29:43,352 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-29 13:29:43,352 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-29 13:29:43,353 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-29 13:29:43,353 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-29 13:29:43,353 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true;unknown-allowed=true; [2020-10-29 13:29:43,707 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-29 13:29:43,739 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-29 13:29:43,743 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-29 13:29:43,745 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-29 13:29:43,745 INFO L275 PluginConnector]: CDTParser initialized [2020-10-29 13:29:43,747 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.7.1.ufo.BOUNDED-14.pals.c.v+cfa-reducer.c [2020-10-29 13:29:43,840 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/08a2ee1c4/f089d13d2d724740b9f88b0b05387889/FLAGee677db27 [2020-10-29 13:29:44,444 INFO L306 CDTParser]: Found 1 translation units. [2020-10-29 13:29:44,445 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.7.1.ufo.BOUNDED-14.pals.c.v+cfa-reducer.c [2020-10-29 13:29:44,480 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/08a2ee1c4/f089d13d2d724740b9f88b0b05387889/FLAGee677db27 [2020-10-29 13:29:44,762 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/08a2ee1c4/f089d13d2d724740b9f88b0b05387889 [2020-10-29 13:29:44,770 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-29 13:29:44,777 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-29 13:29:44,779 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-29 13:29:44,779 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-29 13:29:44,783 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-29 13:29:44,784 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 01:29:44" (1/1) ... [2020-10-29 13:29:44,787 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5dec8fc4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:29:44, skipping insertion in model container [2020-10-29 13:29:44,788 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 01:29:44" (1/1) ... [2020-10-29 13:29:44,796 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-29 13:29:44,841 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-29 13:29:45,134 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 13:29:45,173 INFO L203 MainTranslator]: Completed pre-run [2020-10-29 13:29:45,363 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 13:29:45,413 INFO L208 MainTranslator]: Completed translation [2020-10-29 13:29:45,413 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:29:45 WrapperNode [2020-10-29 13:29:45,414 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-29 13:29:45,415 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-29 13:29:45,415 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-29 13:29:45,415 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-29 13:29:45,433 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:29:45" (1/1) ... [2020-10-29 13:29:45,436 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:29:45" (1/1) ... [2020-10-29 13:29:45,473 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:29:45" (1/1) ... [2020-10-29 13:29:45,474 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:29:45" (1/1) ... [2020-10-29 13:29:45,516 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:29:45" (1/1) ... [2020-10-29 13:29:45,539 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:29:45" (1/1) ... [2020-10-29 13:29:45,552 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:29:45" (1/1) ... [2020-10-29 13:29:45,559 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-29 13:29:45,560 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-29 13:29:45,560 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-29 13:29:45,560 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-29 13:29:45,561 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:29:45" (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 [2020-10-29 13:29:45,651 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-29 13:29:45,651 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-29 13:29:45,651 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-29 13:29:45,651 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-29 13:29:45,652 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-29 13:29:45,652 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-29 13:29:45,652 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-29 13:29:45,652 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-29 13:29:45,652 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-29 13:29:45,653 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-29 13:29:45,653 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-29 13:29:45,653 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-29 13:29:45,653 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-29 13:29:45,653 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-29 13:29:45,654 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-29 13:29:45,654 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-29 13:29:45,654 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-29 13:29:45,654 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-29 13:29:45,654 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-29 13:29:45,654 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-10-29 13:29:45,655 INFO L130 BoogieDeclarations]: Found specification of procedure node6 [2020-10-29 13:29:45,655 INFO L130 BoogieDeclarations]: Found specification of procedure node7 [2020-10-29 13:29:45,655 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-29 13:29:45,655 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-29 13:29:45,655 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-29 13:29:45,656 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-29 13:29:45,656 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-29 13:29:45,656 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-29 13:29:45,656 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-29 13:29:45,656 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-29 13:29:45,656 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-29 13:29:46,871 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-29 13:29:46,872 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-29 13:29:46,874 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 01:29:46 BoogieIcfgContainer [2020-10-29 13:29:46,875 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-29 13:29:46,877 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-29 13:29:46,877 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-29 13:29:46,881 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-29 13:29:46,882 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.10 01:29:44" (1/3) ... [2020-10-29 13:29:46,883 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6bb04d7f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 01:29:46, skipping insertion in model container [2020-10-29 13:29:46,883 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:29:45" (2/3) ... [2020-10-29 13:29:46,884 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6bb04d7f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 01:29:46, skipping insertion in model container [2020-10-29 13:29:46,884 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 01:29:46" (3/3) ... [2020-10-29 13:29:46,886 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.7.1.ufo.BOUNDED-14.pals.c.v+cfa-reducer.c [2020-10-29 13:29:46,902 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-29 13:29:46,908 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-29 13:29:46,924 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-29 13:29:46,957 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-29 13:29:46,957 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-29 13:29:46,957 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-29 13:29:46,957 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-29 13:29:46,957 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-29 13:29:46,958 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-29 13:29:46,958 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-29 13:29:46,958 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-29 13:29:46,982 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states. [2020-10-29 13:29:46,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-10-29 13:29:46,995 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:29:46,996 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:29:46,997 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:29:47,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:29:47,004 INFO L82 PathProgramCache]: Analyzing trace with hash 247434898, now seen corresponding path program 1 times [2020-10-29 13:29:47,014 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:29:47,015 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1991038430] [2020-10-29 13:29:47,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:29:47,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:29:47,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:29:47,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:29:47,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:29:48,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:29:48,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:29:49,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:29:49,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:29:52,379 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:29:52,379 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 99 [2020-10-29 13:29:52,380 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-29 13:29:52,380 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-29 13:29:52,383 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:29:52,383 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:29:52,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:29:52,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-29 13:29:52,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-29 13:29:52,384 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-29 13:29:53,181 WARN L193 SmtUtils]: Spent 641.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-10-29 13:29:53,185 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:29:53,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:29:53,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:29:53,213 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:29:53,213 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:29:53,214 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:29:53,214 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-29 13:29:53,214 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:29:53,214 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:29:53,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:29:53,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:29:53,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:29:53,215 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:29:53,260 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:29:53,261 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1991038430] [2020-10-29 13:29:53,263 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:29:53,263 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 13:29:53,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358701038] [2020-10-29 13:29:53,269 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 13:29:53,270 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:29:53,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 13:29:53,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 13:29:53,287 INFO L87 Difference]: Start difference. First operand 145 states. Second operand 4 states. [2020-10-29 13:29:54,220 WARN L193 SmtUtils]: Spent 833.00 ms on a formula simplification that was a NOOP. DAG size: 206 [2020-10-29 13:29:55,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:29:55,962 INFO L93 Difference]: Finished difference Result 307 states and 499 transitions. [2020-10-29 13:29:55,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 13:29:55,965 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 91 [2020-10-29 13:29:55,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:29:55,978 INFO L225 Difference]: With dead ends: 307 [2020-10-29 13:29:55,978 INFO L226 Difference]: Without dead ends: 211 [2020-10-29 13:29:55,982 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:29:56,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2020-10-29 13:29:56,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 208. [2020-10-29 13:29:56,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2020-10-29 13:29:56,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 297 transitions. [2020-10-29 13:29:56,055 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 297 transitions. Word has length 91 [2020-10-29 13:29:56,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:29:56,056 INFO L481 AbstractCegarLoop]: Abstraction has 208 states and 297 transitions. [2020-10-29 13:29:56,056 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 13:29:56,056 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 297 transitions. [2020-10-29 13:29:56,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-10-29 13:29:56,060 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:29:56,060 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:29:56,061 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-29 13:29:56,061 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:29:56,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:29:56,062 INFO L82 PathProgramCache]: Analyzing trace with hash -2092104989, now seen corresponding path program 1 times [2020-10-29 13:29:56,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:29:56,062 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1273623566] [2020-10-29 13:29:56,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:29:56,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:29:56,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:29:56,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:29:56,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:29:56,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:29:56,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:29:56,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:29:59,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:30:01,142 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:30:01,143 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 100 [2020-10-29 13:30:01,143 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-29 13:30:01,143 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5033 [2020-10-29 13:30:01,144 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:30:01,144 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:30:01,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-29 13:30:01,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-29 13:30:01,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-10-29 13:30:01,145 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:30:01,999 WARN L193 SmtUtils]: Spent 618.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-10-29 13:30:02,006 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:30:02,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:30:02,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:30:02,043 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:30:02,043 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:30:02,043 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:30:02,043 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-29 13:30:02,044 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:30:02,044 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:30:02,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:30:02,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:30:02,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:30:02,045 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:30:02,089 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:30:02,090 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1273623566] [2020-10-29 13:30:02,090 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:30:02,091 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-29 13:30:02,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110028070] [2020-10-29 13:30:02,093 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-29 13:30:02,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:30:02,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-29 13:30:02,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-29 13:30:02,095 INFO L87 Difference]: Start difference. First operand 208 states and 297 transitions. Second operand 10 states. [2020-10-29 13:30:02,998 WARN L193 SmtUtils]: Spent 756.00 ms on a formula simplification that was a NOOP. DAG size: 216 [2020-10-29 13:30:05,094 WARN L193 SmtUtils]: Spent 632.00 ms on a formula simplification that was a NOOP. DAG size: 204 [2020-10-29 13:30:05,843 WARN L193 SmtUtils]: Spent 675.00 ms on a formula simplification that was a NOOP. DAG size: 206 [2020-10-29 13:30:06,595 WARN L193 SmtUtils]: Spent 692.00 ms on a formula simplification that was a NOOP. DAG size: 212 [2020-10-29 13:30:07,515 WARN L193 SmtUtils]: Spent 859.00 ms on a formula simplification that was a NOOP. DAG size: 214 [2020-10-29 13:30:08,337 WARN L193 SmtUtils]: Spent 750.00 ms on a formula simplification that was a NOOP. DAG size: 210 [2020-10-29 13:30:09,127 WARN L193 SmtUtils]: Spent 738.00 ms on a formula simplification that was a NOOP. DAG size: 208 [2020-10-29 13:30:10,072 WARN L193 SmtUtils]: Spent 724.00 ms on a formula simplification that was a NOOP. DAG size: 206 [2020-10-29 13:30:10,869 WARN L193 SmtUtils]: Spent 725.00 ms on a formula simplification that was a NOOP. DAG size: 208 [2020-10-29 13:30:11,717 WARN L193 SmtUtils]: Spent 770.00 ms on a formula simplification that was a NOOP. DAG size: 214 [2020-10-29 13:30:12,586 WARN L193 SmtUtils]: Spent 787.00 ms on a formula simplification that was a NOOP. DAG size: 212 [2020-10-29 13:30:13,400 WARN L193 SmtUtils]: Spent 756.00 ms on a formula simplification that was a NOOP. DAG size: 210 [2020-10-29 13:30:14,428 WARN L193 SmtUtils]: Spent 657.00 ms on a formula simplification that was a NOOP. DAG size: 205 [2020-10-29 13:30:14,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:30:14,462 INFO L93 Difference]: Finished difference Result 2322 states and 3657 transitions. [2020-10-29 13:30:14,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-29 13:30:14,463 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 92 [2020-10-29 13:30:14,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:30:14,480 INFO L225 Difference]: With dead ends: 2322 [2020-10-29 13:30:14,480 INFO L226 Difference]: Without dead ends: 2171 [2020-10-29 13:30:14,484 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 11.1s TimeCoverageRelationStatistics Valid=322, Invalid=800, Unknown=0, NotChecked=0, Total=1122 [2020-10-29 13:30:14,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2171 states. [2020-10-29 13:30:14,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2171 to 356. [2020-10-29 13:30:14,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 356 states. [2020-10-29 13:30:14,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 531 transitions. [2020-10-29 13:30:14,586 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 531 transitions. Word has length 92 [2020-10-29 13:30:14,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:30:14,587 INFO L481 AbstractCegarLoop]: Abstraction has 356 states and 531 transitions. [2020-10-29 13:30:14,587 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-29 13:30:14,588 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 531 transitions. [2020-10-29 13:30:14,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-10-29 13:30:14,592 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:30:14,592 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:30:14,592 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-29 13:30:14,593 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:30:14,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:30:14,593 INFO L82 PathProgramCache]: Analyzing trace with hash -1026820240, now seen corresponding path program 1 times [2020-10-29 13:30:14,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:30:14,594 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1071840250] [2020-10-29 13:30:14,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:30:14,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:30:14,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:30:14,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:30:14,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:30:14,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:30:14,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:30:15,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:30:16,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:30:16,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:30:19,642 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:30:19,642 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-10-29 13:30:19,643 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-29 13:30:19,643 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-29 13:30:19,643 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:30:19,643 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:30:19,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:30:19,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 40 [2020-10-29 13:30:19,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-29 13:30:19,644 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:30:20,323 WARN L193 SmtUtils]: Spent 583.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-10-29 13:30:20,326 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:30:20,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:30:20,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:30:20,349 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:30:20,350 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:30:20,350 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:30:20,350 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-29 13:30:20,350 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:30:20,350 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:30:20,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:30:20,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:30:20,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:30:20,351 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:30:20,397 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:30:20,398 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1071840250] [2020-10-29 13:30:20,398 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:30:20,398 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 13:30:20,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333272635] [2020-10-29 13:30:20,399 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 13:30:20,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:30:20,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 13:30:20,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 13:30:20,400 INFO L87 Difference]: Start difference. First operand 356 states and 531 transitions. Second operand 4 states. [2020-10-29 13:30:21,131 WARN L193 SmtUtils]: Spent 656.00 ms on a formula simplification that was a NOOP. DAG size: 206 [2020-10-29 13:30:22,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:30:22,039 INFO L93 Difference]: Finished difference Result 922 states and 1427 transitions. [2020-10-29 13:30:22,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 13:30:22,040 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 94 [2020-10-29 13:30:22,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:30:22,044 INFO L225 Difference]: With dead ends: 922 [2020-10-29 13:30:22,045 INFO L226 Difference]: Without dead ends: 623 [2020-10-29 13:30:22,047 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:30:22,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 623 states. [2020-10-29 13:30:22,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 623 to 620. [2020-10-29 13:30:22,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 620 states. [2020-10-29 13:30:22,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 620 states to 620 states and 947 transitions. [2020-10-29 13:30:22,101 INFO L78 Accepts]: Start accepts. Automaton has 620 states and 947 transitions. Word has length 94 [2020-10-29 13:30:22,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:30:22,102 INFO L481 AbstractCegarLoop]: Abstraction has 620 states and 947 transitions. [2020-10-29 13:30:22,102 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 13:30:22,102 INFO L276 IsEmpty]: Start isEmpty. Operand 620 states and 947 transitions. [2020-10-29 13:30:22,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-10-29 13:30:22,105 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:30:22,105 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:30:22,105 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-29 13:30:22,105 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:30:22,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:30:22,106 INFO L82 PathProgramCache]: Analyzing trace with hash 41753448, now seen corresponding path program 1 times [2020-10-29 13:30:22,106 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:30:22,107 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2102442686] [2020-10-29 13:30:22,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:30:22,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:30:22,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:30:22,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:30:22,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:30:22,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:30:22,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:30:22,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:30:24,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:30:24,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:30:24,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:30:27,154 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:30:27,155 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 103 [2020-10-29 13:30:27,155 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-29 13:30:27,155 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-29 13:30:27,155 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:30:27,155 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:30:27,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:30:27,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 13:30:27,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 88 [2020-10-29 13:30:27,157 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:30:27,923 WARN L193 SmtUtils]: Spent 663.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-10-29 13:30:27,925 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:30:27,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:30:27,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:30:27,986 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:30:27,986 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:30:27,986 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:30:27,986 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 41 [2020-10-29 13:30:27,987 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:30:27,987 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:30:27,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:30:27,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:30:27,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 13:30:27,988 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:30:28,028 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:30:28,029 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2102442686] [2020-10-29 13:30:28,029 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:30:28,029 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 13:30:28,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412940377] [2020-10-29 13:30:28,030 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:30:28,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:30:28,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:30:28,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:30:28,031 INFO L87 Difference]: Start difference. First operand 620 states and 947 transitions. Second operand 6 states. [2020-10-29 13:30:28,879 WARN L193 SmtUtils]: Spent 758.00 ms on a formula simplification that was a NOOP. DAG size: 208 [2020-10-29 13:30:29,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:30:29,847 INFO L93 Difference]: Finished difference Result 1183 states and 1837 transitions. [2020-10-29 13:30:29,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-29 13:30:29,850 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 95 [2020-10-29 13:30:29,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:30:29,855 INFO L225 Difference]: With dead ends: 1183 [2020-10-29 13:30:29,856 INFO L226 Difference]: Without dead ends: 620 [2020-10-29 13:30:29,858 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-29 13:30:29,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 620 states. [2020-10-29 13:30:29,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 620 to 620. [2020-10-29 13:30:29,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 620 states. [2020-10-29 13:30:29,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 620 states to 620 states and 943 transitions. [2020-10-29 13:30:29,915 INFO L78 Accepts]: Start accepts. Automaton has 620 states and 943 transitions. Word has length 95 [2020-10-29 13:30:29,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:30:29,916 INFO L481 AbstractCegarLoop]: Abstraction has 620 states and 943 transitions. [2020-10-29 13:30:29,916 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:30:29,916 INFO L276 IsEmpty]: Start isEmpty. Operand 620 states and 943 transitions. [2020-10-29 13:30:29,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-10-29 13:30:29,918 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:30:29,918 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:30:29,918 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-29 13:30:29,919 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:30:29,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:30:29,919 INFO L82 PathProgramCache]: Analyzing trace with hash 876955939, now seen corresponding path program 1 times [2020-10-29 13:30:29,919 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:30:29,920 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1697728561] [2020-10-29 13:30:29,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:30:29,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:30:29,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:30:30,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:30:30,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:30:30,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:30:30,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:30:30,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:30:32,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:30:34,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:30:34,973 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:30:34,973 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 103 [2020-10-29 13:30:34,974 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-29 13:30:34,974 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-29 13:30:34,974 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:30:34,974 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:30:34,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-29 13:30:34,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 13:30:34,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-29 13:30:34,975 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:30:35,786 WARN L193 SmtUtils]: Spent 618.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-10-29 13:30:35,787 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:30:35,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:30:35,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:30:35,826 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:30:35,826 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:30:35,826 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:30:35,826 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-10-29 13:30:35,827 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:30:35,827 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:30:35,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:30:35,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:30:35,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 13:30:35,828 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:30:35,858 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:30:35,858 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1697728561] [2020-10-29 13:30:35,859 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:30:35,859 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 13:30:35,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363693553] [2020-10-29 13:30:35,860 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 13:30:35,860 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:30:35,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 13:30:35,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-29 13:30:35,861 INFO L87 Difference]: Start difference. First operand 620 states and 943 transitions. Second operand 7 states. [2020-10-29 13:30:36,666 WARN L193 SmtUtils]: Spent 686.00 ms on a formula simplification that was a NOOP. DAG size: 208 [2020-10-29 13:30:37,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:30:37,970 INFO L93 Difference]: Finished difference Result 1867 states and 2895 transitions. [2020-10-29 13:30:37,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-29 13:30:37,971 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 95 [2020-10-29 13:30:37,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:30:37,979 INFO L225 Difference]: With dead ends: 1867 [2020-10-29 13:30:37,980 INFO L226 Difference]: Without dead ends: 1304 [2020-10-29 13:30:37,982 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-10-29 13:30:37,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1304 states. [2020-10-29 13:30:38,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1304 to 631. [2020-10-29 13:30:38,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 631 states. [2020-10-29 13:30:38,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 631 states to 631 states and 959 transitions. [2020-10-29 13:30:38,055 INFO L78 Accepts]: Start accepts. Automaton has 631 states and 959 transitions. Word has length 95 [2020-10-29 13:30:38,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:30:38,056 INFO L481 AbstractCegarLoop]: Abstraction has 631 states and 959 transitions. [2020-10-29 13:30:38,056 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 13:30:38,056 INFO L276 IsEmpty]: Start isEmpty. Operand 631 states and 959 transitions. [2020-10-29 13:30:38,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-10-29 13:30:38,058 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:30:38,059 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:30:38,059 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-29 13:30:38,059 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:30:38,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:30:38,060 INFO L82 PathProgramCache]: Analyzing trace with hash -1450089367, now seen corresponding path program 1 times [2020-10-29 13:30:38,060 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:30:38,060 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [600076379] [2020-10-29 13:30:38,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:30:38,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:30:38,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:30:38,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:30:38,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:30:38,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:30:38,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:30:38,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:30:39,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:30:41,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:30:43,102 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:30:43,102 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 103 [2020-10-29 13:30:43,103 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-29 13:30:43,103 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-29 13:30:43,103 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:30:43,103 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:30:43,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-29 13:30:43,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 13:30:43,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-29 13:30:43,104 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:30:44,121 WARN L193 SmtUtils]: Spent 806.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-10-29 13:30:44,123 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:30:44,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:30:44,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:30:44,164 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:30:44,164 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:30:44,164 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:30:44,164 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 29 [2020-10-29 13:30:44,165 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:30:44,165 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:30:44,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:30:44,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:30:44,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 13:30:44,165 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:30:44,216 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:30:44,217 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [600076379] [2020-10-29 13:30:44,217 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:30:44,217 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 13:30:44,217 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868587704] [2020-10-29 13:30:44,218 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 13:30:44,218 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:30:44,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 13:30:44,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-29 13:30:44,219 INFO L87 Difference]: Start difference. First operand 631 states and 959 transitions. Second operand 7 states. [2020-10-29 13:30:44,968 WARN L193 SmtUtils]: Spent 663.00 ms on a formula simplification that was a NOOP. DAG size: 209 [2020-10-29 13:30:46,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:30:46,379 INFO L93 Difference]: Finished difference Result 1999 states and 3096 transitions. [2020-10-29 13:30:46,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-29 13:30:46,381 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 95 [2020-10-29 13:30:46,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:30:46,388 INFO L225 Difference]: With dead ends: 1999 [2020-10-29 13:30:46,389 INFO L226 Difference]: Without dead ends: 1436 [2020-10-29 13:30:46,390 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-10-29 13:30:46,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1436 states. [2020-10-29 13:30:46,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1436 to 639. [2020-10-29 13:30:46,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 639 states. [2020-10-29 13:30:46,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 639 states to 639 states and 970 transitions. [2020-10-29 13:30:46,475 INFO L78 Accepts]: Start accepts. Automaton has 639 states and 970 transitions. Word has length 95 [2020-10-29 13:30:46,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:30:46,475 INFO L481 AbstractCegarLoop]: Abstraction has 639 states and 970 transitions. [2020-10-29 13:30:46,475 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 13:30:46,475 INFO L276 IsEmpty]: Start isEmpty. Operand 639 states and 970 transitions. [2020-10-29 13:30:46,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-10-29 13:30:46,476 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:30:46,477 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:30:46,477 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-29 13:30:46,477 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:30:46,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:30:46,478 INFO L82 PathProgramCache]: Analyzing trace with hash -1394695365, now seen corresponding path program 1 times [2020-10-29 13:30:46,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:30:46,478 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1340925938] [2020-10-29 13:30:46,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:30:46,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:30:46,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:30:46,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:30:46,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:30:46,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:30:46,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:30:46,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:30:47,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:30:49,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:30:51,527 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:30:51,528 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 103 [2020-10-29 13:30:51,528 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-29 13:30:51,528 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-10-29 13:30:51,528 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:30:51,528 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:30:51,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-29 13:30:51,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 13:30:51,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 84 [2020-10-29 13:30:51,529 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:30:52,394 WARN L193 SmtUtils]: Spent 611.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-10-29 13:30:52,395 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:30:52,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:30:52,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:30:52,441 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:30:52,441 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:30:52,442 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:30:52,442 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-10-29 13:30:52,442 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:30:52,442 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:30:52,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:30:52,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:30:52,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 13:30:52,443 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:30:52,519 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:30:52,519 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1340925938] [2020-10-29 13:30:52,520 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:30:52,520 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 13:30:52,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864245273] [2020-10-29 13:30:52,521 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 13:30:52,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:30:52,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 13:30:52,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-29 13:30:52,528 INFO L87 Difference]: Start difference. First operand 639 states and 970 transitions. Second operand 7 states. [2020-10-29 13:30:53,239 WARN L193 SmtUtils]: Spent 625.00 ms on a formula simplification that was a NOOP. DAG size: 209 [2020-10-29 13:30:54,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:30:54,763 INFO L93 Difference]: Finished difference Result 1805 states and 2783 transitions. [2020-10-29 13:30:54,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-29 13:30:54,764 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 95 [2020-10-29 13:30:54,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:30:54,770 INFO L225 Difference]: With dead ends: 1805 [2020-10-29 13:30:54,770 INFO L226 Difference]: Without dead ends: 1242 [2020-10-29 13:30:54,772 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-10-29 13:30:54,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1242 states. [2020-10-29 13:30:54,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1242 to 681. [2020-10-29 13:30:54,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 681 states. [2020-10-29 13:30:54,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 681 states to 681 states and 1034 transitions. [2020-10-29 13:30:54,859 INFO L78 Accepts]: Start accepts. Automaton has 681 states and 1034 transitions. Word has length 95 [2020-10-29 13:30:54,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:30:54,859 INFO L481 AbstractCegarLoop]: Abstraction has 681 states and 1034 transitions. [2020-10-29 13:30:54,859 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 13:30:54,859 INFO L276 IsEmpty]: Start isEmpty. Operand 681 states and 1034 transitions. [2020-10-29 13:30:54,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-10-29 13:30:54,860 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:30:54,861 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:30:54,861 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-29 13:30:54,861 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:30:54,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:30:54,862 INFO L82 PathProgramCache]: Analyzing trace with hash -1370365419, now seen corresponding path program 1 times [2020-10-29 13:30:54,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:30:54,862 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2113870992] [2020-10-29 13:30:54,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:30:54,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:30:54,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:30:54,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:30:54,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:30:55,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:30:55,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:30:55,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:30:55,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:30:55,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:30:58,595 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:30:58,596 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 103 [2020-10-29 13:30:58,596 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-29 13:30:58,596 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3706 [2020-10-29 13:30:58,596 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:30:58,596 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:30:58,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:30:58,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 13:30:58,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 84 [2020-10-29 13:30:58,597 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:30:59,328 WARN L193 SmtUtils]: Spent 675.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-10-29 13:30:59,329 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:30:59,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:30:59,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:30:59,343 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:30:59,343 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:30:59,343 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:30:59,343 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-29 13:30:59,343 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:30:59,344 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:30:59,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:30:59,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:30:59,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:30:59,344 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:30:59,365 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:30:59,365 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2113870992] [2020-10-29 13:30:59,365 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:30:59,366 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 13:30:59,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065634759] [2020-10-29 13:30:59,366 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 13:30:59,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:30:59,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 13:30:59,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 13:30:59,367 INFO L87 Difference]: Start difference. First operand 681 states and 1034 transitions. Second operand 4 states. [2020-10-29 13:31:00,133 WARN L193 SmtUtils]: Spent 696.00 ms on a formula simplification that was a NOOP. DAG size: 204 [2020-10-29 13:31:01,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:31:01,059 INFO L93 Difference]: Finished difference Result 1521 states and 2354 transitions. [2020-10-29 13:31:01,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 13:31:01,060 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 95 [2020-10-29 13:31:01,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:31:01,065 INFO L225 Difference]: With dead ends: 1521 [2020-10-29 13:31:01,065 INFO L226 Difference]: Without dead ends: 958 [2020-10-29 13:31:01,067 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:31:01,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 958 states. [2020-10-29 13:31:01,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 958 to 955. [2020-10-29 13:31:01,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 955 states. [2020-10-29 13:31:01,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 955 states to 955 states and 1460 transitions. [2020-10-29 13:31:01,197 INFO L78 Accepts]: Start accepts. Automaton has 955 states and 1460 transitions. Word has length 95 [2020-10-29 13:31:01,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:31:01,197 INFO L481 AbstractCegarLoop]: Abstraction has 955 states and 1460 transitions. [2020-10-29 13:31:01,197 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 13:31:01,197 INFO L276 IsEmpty]: Start isEmpty. Operand 955 states and 1460 transitions. [2020-10-29 13:31:01,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-10-29 13:31:01,198 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:31:01,199 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:31:01,199 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-29 13:31:01,199 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:31:01,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:31:01,200 INFO L82 PathProgramCache]: Analyzing trace with hash -748835786, now seen corresponding path program 1 times [2020-10-29 13:31:01,200 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:31:01,200 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [955714334] [2020-10-29 13:31:01,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:31:01,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:31:01,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:31:01,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:31:01,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:31:01,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:31:01,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:31:02,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:31:06,238 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:31:06,239 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 103 [2020-10-29 13:31:06,239 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-29 13:31:06,239 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-29 13:31:06,239 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:31:06,239 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:31:06,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-29 13:31:06,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-29 13:31:06,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 83 [2020-10-29 13:31:06,239 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:31:07,197 WARN L193 SmtUtils]: Spent 680.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-10-29 13:31:07,199 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:31:07,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:31:07,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:31:07,218 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:31:07,218 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:31:07,218 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:31:07,218 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-29 13:31:07,219 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:31:07,219 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:31:07,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:31:07,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:31:07,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:31:07,220 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:31:07,266 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:31:07,266 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [955714334] [2020-10-29 13:31:07,267 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:31:07,267 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-29 13:31:07,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306487200] [2020-10-29 13:31:07,267 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-29 13:31:07,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:31:07,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-29 13:31:07,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-29 13:31:07,268 INFO L87 Difference]: Start difference. First operand 955 states and 1460 transitions. Second operand 10 states. [2020-10-29 13:31:08,406 WARN L193 SmtUtils]: Spent 974.00 ms on a formula simplification that was a NOOP. DAG size: 223 [2020-10-29 13:31:10,456 WARN L193 SmtUtils]: Spent 833.00 ms on a formula simplification that was a NOOP. DAG size: 214 [2020-10-29 13:31:11,275 WARN L193 SmtUtils]: Spent 775.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2020-10-29 13:31:12,261 WARN L193 SmtUtils]: Spent 873.00 ms on a formula simplification that was a NOOP. DAG size: 217 [2020-10-29 13:31:13,146 WARN L193 SmtUtils]: Spent 825.00 ms on a formula simplification that was a NOOP. DAG size: 214 [2020-10-29 13:31:14,665 WARN L193 SmtUtils]: Spent 715.00 ms on a formula simplification that was a NOOP. DAG size: 205 [2020-10-29 13:31:15,484 WARN L193 SmtUtils]: Spent 751.00 ms on a formula simplification that was a NOOP. DAG size: 208 [2020-10-29 13:31:16,421 WARN L193 SmtUtils]: Spent 883.00 ms on a formula simplification that was a NOOP. DAG size: 217 [2020-10-29 13:31:17,397 WARN L193 SmtUtils]: Spent 923.00 ms on a formula simplification that was a NOOP. DAG size: 220 [2020-10-29 13:31:18,262 WARN L193 SmtUtils]: Spent 741.00 ms on a formula simplification that was a NOOP. DAG size: 206 [2020-10-29 13:31:19,076 WARN L193 SmtUtils]: Spent 764.00 ms on a formula simplification that was a NOOP. DAG size: 208 [2020-10-29 13:31:19,934 WARN L193 SmtUtils]: Spent 802.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2020-10-29 13:31:20,912 WARN L193 SmtUtils]: Spent 929.00 ms on a formula simplification that was a NOOP. DAG size: 220 [2020-10-29 13:31:21,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:31:21,327 INFO L93 Difference]: Finished difference Result 6565 states and 10237 transitions. [2020-10-29 13:31:21,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-29 13:31:21,328 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 95 [2020-10-29 13:31:21,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:31:21,355 INFO L225 Difference]: With dead ends: 6565 [2020-10-29 13:31:21,355 INFO L226 Difference]: Without dead ends: 5728 [2020-10-29 13:31:21,360 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 12.7s TimeCoverageRelationStatistics Valid=322, Invalid=800, Unknown=0, NotChecked=0, Total=1122 [2020-10-29 13:31:21,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5728 states. [2020-10-29 13:31:21,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5728 to 955. [2020-10-29 13:31:21,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 955 states. [2020-10-29 13:31:21,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 955 states to 955 states and 1454 transitions. [2020-10-29 13:31:21,592 INFO L78 Accepts]: Start accepts. Automaton has 955 states and 1454 transitions. Word has length 95 [2020-10-29 13:31:21,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:31:21,592 INFO L481 AbstractCegarLoop]: Abstraction has 955 states and 1454 transitions. [2020-10-29 13:31:21,592 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-29 13:31:21,592 INFO L276 IsEmpty]: Start isEmpty. Operand 955 states and 1454 transitions. [2020-10-29 13:31:21,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-10-29 13:31:21,593 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:31:21,593 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:31:21,594 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-29 13:31:21,594 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:31:21,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:31:21,594 INFO L82 PathProgramCache]: Analyzing trace with hash 1385173365, now seen corresponding path program 1 times [2020-10-29 13:31:21,595 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:31:21,595 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1631338681] [2020-10-29 13:31:21,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:31:21,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:31:21,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:31:21,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:31:21,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:31:21,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:31:21,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:31:22,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:31:22,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:31:24,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:31:26,622 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:31:26,622 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 103 [2020-10-29 13:31:26,622 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-29 13:31:26,622 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-29 13:31:26,622 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:31:26,623 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:31:26,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-29 13:31:26,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 13:31:26,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-10-29 13:31:26,623 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:31:27,501 WARN L193 SmtUtils]: Spent 677.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-10-29 13:31:27,502 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:31:27,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:31:27,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:31:27,531 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:31:27,531 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:31:27,532 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:31:27,532 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-29 13:31:27,532 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:31:27,532 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:31:27,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:31:27,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:31:27,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 13:31:27,533 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:31:27,571 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:31:27,571 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1631338681] [2020-10-29 13:31:27,571 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:31:27,571 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 13:31:27,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175177614] [2020-10-29 13:31:27,572 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 13:31:27,572 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:31:27,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 13:31:27,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-29 13:31:27,573 INFO L87 Difference]: Start difference. First operand 955 states and 1454 transitions. Second operand 7 states. [2020-10-29 13:31:28,371 WARN L193 SmtUtils]: Spent 713.00 ms on a formula simplification that was a NOOP. DAG size: 209 [2020-10-29 13:31:30,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:31:30,019 INFO L93 Difference]: Finished difference Result 2743 states and 4213 transitions. [2020-10-29 13:31:30,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-29 13:31:30,024 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 95 [2020-10-29 13:31:30,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:31:30,033 INFO L225 Difference]: With dead ends: 2743 [2020-10-29 13:31:30,033 INFO L226 Difference]: Without dead ends: 1894 [2020-10-29 13:31:30,036 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-10-29 13:31:30,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1894 states. [2020-10-29 13:31:30,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1894 to 951. [2020-10-29 13:31:30,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 951 states. [2020-10-29 13:31:30,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 951 states to 951 states and 1444 transitions. [2020-10-29 13:31:30,208 INFO L78 Accepts]: Start accepts. Automaton has 951 states and 1444 transitions. Word has length 95 [2020-10-29 13:31:30,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:31:30,209 INFO L481 AbstractCegarLoop]: Abstraction has 951 states and 1444 transitions. [2020-10-29 13:31:30,209 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 13:31:30,209 INFO L276 IsEmpty]: Start isEmpty. Operand 951 states and 1444 transitions. [2020-10-29 13:31:30,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-10-29 13:31:30,210 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:31:30,210 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:31:30,210 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-29 13:31:30,211 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:31:30,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:31:30,211 INFO L82 PathProgramCache]: Analyzing trace with hash 1855301423, now seen corresponding path program 1 times [2020-10-29 13:31:30,211 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:31:30,212 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1378394645] [2020-10-29 13:31:30,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:31:30,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:31:30,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:31:30,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:31:30,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:31:30,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:31:30,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:31:30,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:31:30,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:31:32,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:31:35,248 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:31:35,249 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 103 [2020-10-29 13:31:35,249 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-29 13:31:35,249 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-29 13:31:35,249 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:31:35,249 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:31:35,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-29 13:31:35,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 13:31:35,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-29 13:31:35,250 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:31:36,135 WARN L193 SmtUtils]: Spent 685.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-10-29 13:31:36,137 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:31:36,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:31:36,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:31:36,163 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:31:36,164 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:31:36,164 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:31:36,164 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-29 13:31:36,164 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:31:36,164 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:31:36,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:31:36,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:31:36,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 13:31:36,164 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:31:36,203 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:31:36,204 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1378394645] [2020-10-29 13:31:36,204 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:31:36,204 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 13:31:36,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170616942] [2020-10-29 13:31:36,205 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 13:31:36,205 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:31:36,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 13:31:36,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-29 13:31:36,206 INFO L87 Difference]: Start difference. First operand 951 states and 1444 transitions. Second operand 7 states. [2020-10-29 13:31:37,018 WARN L193 SmtUtils]: Spent 727.00 ms on a formula simplification that was a NOOP. DAG size: 209 [2020-10-29 13:31:38,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:31:38,725 INFO L93 Difference]: Finished difference Result 2863 states and 4401 transitions. [2020-10-29 13:31:38,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-29 13:31:38,726 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 95 [2020-10-29 13:31:38,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:31:38,733 INFO L225 Difference]: With dead ends: 2863 [2020-10-29 13:31:38,734 INFO L226 Difference]: Without dead ends: 2000 [2020-10-29 13:31:38,736 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-10-29 13:31:38,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2000 states. [2020-10-29 13:31:38,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2000 to 937. [2020-10-29 13:31:38,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 937 states. [2020-10-29 13:31:38,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 937 states to 937 states and 1423 transitions. [2020-10-29 13:31:38,912 INFO L78 Accepts]: Start accepts. Automaton has 937 states and 1423 transitions. Word has length 95 [2020-10-29 13:31:38,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:31:38,913 INFO L481 AbstractCegarLoop]: Abstraction has 937 states and 1423 transitions. [2020-10-29 13:31:38,913 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 13:31:38,913 INFO L276 IsEmpty]: Start isEmpty. Operand 937 states and 1423 transitions. [2020-10-29 13:31:38,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-10-29 13:31:38,914 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:31:38,914 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:31:38,914 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-29 13:31:38,914 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:31:38,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:31:38,915 INFO L82 PathProgramCache]: Analyzing trace with hash -1798503017, now seen corresponding path program 1 times [2020-10-29 13:31:38,915 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:31:38,915 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [279602862] [2020-10-29 13:31:38,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:31:38,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:31:38,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:31:38,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:31:39,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:31:39,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:31:39,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:31:39,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:31:41,466 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:31:41,466 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 104 [2020-10-29 13:31:41,466 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-29 13:31:41,467 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2524 [2020-10-29 13:31:41,467 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:31:41,467 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:31:41,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:31:41,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 36 [2020-10-29 13:31:41,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-29 13:31:41,467 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:31:42,191 WARN L193 SmtUtils]: Spent 683.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-10-29 13:31:42,193 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:31:42,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:31:42,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:31:42,207 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:31:42,207 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:31:42,208 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:31:42,208 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-29 13:31:42,208 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:31:42,208 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:31:42,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:31:42,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:31:42,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:31:42,208 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:31:42,226 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:31:42,227 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [279602862] [2020-10-29 13:31:42,227 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:31:42,227 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 13:31:42,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290936989] [2020-10-29 13:31:42,227 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 13:31:42,228 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:31:42,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 13:31:42,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 13:31:42,228 INFO L87 Difference]: Start difference. First operand 937 states and 1423 transitions. Second operand 4 states. [2020-10-29 13:31:43,036 WARN L193 SmtUtils]: Spent 731.00 ms on a formula simplification that was a NOOP. DAG size: 206 [2020-10-29 13:31:44,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:31:44,287 INFO L93 Difference]: Finished difference Result 2515 states and 3879 transitions. [2020-10-29 13:31:44,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 13:31:44,288 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 96 [2020-10-29 13:31:44,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:31:44,296 INFO L225 Difference]: With dead ends: 2515 [2020-10-29 13:31:44,296 INFO L226 Difference]: Without dead ends: 1677 [2020-10-29 13:31:44,299 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:31:44,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1677 states. [2020-10-29 13:31:44,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1677 to 1667. [2020-10-29 13:31:44,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1667 states. [2020-10-29 13:31:44,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1667 states to 1667 states and 2548 transitions. [2020-10-29 13:31:44,667 INFO L78 Accepts]: Start accepts. Automaton has 1667 states and 2548 transitions. Word has length 96 [2020-10-29 13:31:44,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:31:44,668 INFO L481 AbstractCegarLoop]: Abstraction has 1667 states and 2548 transitions. [2020-10-29 13:31:44,668 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 13:31:44,668 INFO L276 IsEmpty]: Start isEmpty. Operand 1667 states and 2548 transitions. [2020-10-29 13:31:44,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-10-29 13:31:44,669 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:31:44,669 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:31:44,669 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-29 13:31:44,669 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:31:44,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:31:44,670 INFO L82 PathProgramCache]: Analyzing trace with hash -2064796355, now seen corresponding path program 1 times [2020-10-29 13:31:44,670 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:31:44,670 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [350502494] [2020-10-29 13:31:44,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:31:44,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:31:44,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:31:44,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:31:44,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:31:44,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:31:45,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:31:46,996 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:31:46,996 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 105 [2020-10-29 13:31:46,996 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 13:31:46,996 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2295 [2020-10-29 13:31:46,996 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:31:46,996 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:31:46,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:31:46,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 32 [2020-10-29 13:31:46,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-29 13:31:46,997 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:31:47,721 WARN L193 SmtUtils]: Spent 685.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-10-29 13:31:47,722 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:31:47,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:31:47,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:31:47,737 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:31:47,737 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:31:47,737 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:31:47,737 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-29 13:31:47,738 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:31:47,738 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:31:47,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:31:47,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:31:47,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:31:47,738 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:31:47,762 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:31:47,762 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [350502494] [2020-10-29 13:31:47,763 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:31:47,763 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 13:31:47,763 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655693314] [2020-10-29 13:31:47,763 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 13:31:47,764 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:31:47,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 13:31:47,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 13:31:47,764 INFO L87 Difference]: Start difference. First operand 1667 states and 2548 transitions. Second operand 4 states. [2020-10-29 13:31:48,560 WARN L193 SmtUtils]: Spent 728.00 ms on a formula simplification that was a NOOP. DAG size: 206 [2020-10-29 13:31:49,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:31:49,968 INFO L93 Difference]: Finished difference Result 4625 states and 7120 transitions. [2020-10-29 13:31:49,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 13:31:49,969 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 97 [2020-10-29 13:31:49,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:31:49,982 INFO L225 Difference]: With dead ends: 4625 [2020-10-29 13:31:49,983 INFO L226 Difference]: Without dead ends: 3049 [2020-10-29 13:31:49,986 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:31:49,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3049 states. [2020-10-29 13:31:50,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3049 to 3039. [2020-10-29 13:31:50,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3039 states. [2020-10-29 13:31:50,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3039 states to 3039 states and 4641 transitions. [2020-10-29 13:31:50,493 INFO L78 Accepts]: Start accepts. Automaton has 3039 states and 4641 transitions. Word has length 97 [2020-10-29 13:31:50,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:31:50,493 INFO L481 AbstractCegarLoop]: Abstraction has 3039 states and 4641 transitions. [2020-10-29 13:31:50,493 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 13:31:50,493 INFO L276 IsEmpty]: Start isEmpty. Operand 3039 states and 4641 transitions. [2020-10-29 13:31:50,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-10-29 13:31:50,494 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:31:50,496 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:31:50,497 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-29 13:31:50,497 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:31:50,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:31:50,498 INFO L82 PathProgramCache]: Analyzing trace with hash 133205861, now seen corresponding path program 1 times [2020-10-29 13:31:50,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:31:50,498 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [582233722] [2020-10-29 13:31:50,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:31:50,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:31:50,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:31:50,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:31:50,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:31:50,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:31:51,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:31:53,515 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:31:53,515 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 106 [2020-10-29 13:31:53,516 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 13:31:53,516 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2989 [2020-10-29 13:31:53,516 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:31:53,516 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:31:53,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:31:53,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 13:31:53,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-10-29 13:31:53,516 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:31:54,277 WARN L193 SmtUtils]: Spent 688.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-10-29 13:31:54,278 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:31:54,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:31:54,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:31:54,307 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:31:54,307 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:31:54,307 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:31:54,307 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-29 13:31:54,308 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:31:54,308 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:31:54,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:31:54,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:31:54,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 13:31:54,308 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:31:54,330 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:31:54,330 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [582233722] [2020-10-29 13:31:54,330 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:31:54,331 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 13:31:54,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041515190] [2020-10-29 13:31:54,331 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:31:54,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:31:54,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:31:54,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:31:54,332 INFO L87 Difference]: Start difference. First operand 3039 states and 4641 transitions. Second operand 6 states. [2020-10-29 13:31:55,189 WARN L193 SmtUtils]: Spent 758.00 ms on a formula simplification that was a NOOP. DAG size: 208 [2020-10-29 13:31:56,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:31:56,576 INFO L93 Difference]: Finished difference Result 5994 states and 9187 transitions. [2020-10-29 13:31:56,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-29 13:31:56,577 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 98 [2020-10-29 13:31:56,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:31:56,592 INFO L225 Difference]: With dead ends: 5994 [2020-10-29 13:31:56,592 INFO L226 Difference]: Without dead ends: 3039 [2020-10-29 13:31:56,598 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-29 13:31:56,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3039 states. [2020-10-29 13:31:57,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3039 to 3039. [2020-10-29 13:31:57,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3039 states. [2020-10-29 13:31:57,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3039 states to 3039 states and 4617 transitions. [2020-10-29 13:31:57,055 INFO L78 Accepts]: Start accepts. Automaton has 3039 states and 4617 transitions. Word has length 98 [2020-10-29 13:31:57,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:31:57,055 INFO L481 AbstractCegarLoop]: Abstraction has 3039 states and 4617 transitions. [2020-10-29 13:31:57,055 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:31:57,056 INFO L276 IsEmpty]: Start isEmpty. Operand 3039 states and 4617 transitions. [2020-10-29 13:31:57,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-10-29 13:31:57,057 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:31:57,057 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:31:57,057 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-29 13:31:57,057 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:31:57,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:31:57,058 INFO L82 PathProgramCache]: Analyzing trace with hash -191116918, now seen corresponding path program 1 times [2020-10-29 13:31:57,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:31:57,058 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [963360858] [2020-10-29 13:31:57,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:31:57,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:31:57,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:31:57,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:31:57,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:31:57,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:31:58,238 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:31:58,238 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 106 [2020-10-29 13:31:58,238 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 13:31:58,238 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1152 [2020-10-29 13:31:58,239 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:31:58,239 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:31:58,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:31:58,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-29 13:31:58,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-29 13:31:58,239 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:31:58,949 WARN L193 SmtUtils]: Spent 672.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-10-29 13:31:58,950 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:31:58,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:31:58,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:31:58,966 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:31:58,966 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:31:58,966 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:31:58,966 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-29 13:31:58,967 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:31:58,967 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:31:58,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:31:58,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:31:58,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:31:58,967 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:31:58,985 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:31:58,986 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [963360858] [2020-10-29 13:31:58,986 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:31:58,986 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 13:31:58,986 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796165976] [2020-10-29 13:31:58,986 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 13:31:58,987 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:31:58,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 13:31:58,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 13:31:58,987 INFO L87 Difference]: Start difference. First operand 3039 states and 4617 transitions. Second operand 4 states. [2020-10-29 13:31:59,772 WARN L193 SmtUtils]: Spent 718.00 ms on a formula simplification that was a NOOP. DAG size: 206 [2020-10-29 13:32:01,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:32:01,564 INFO L93 Difference]: Finished difference Result 8565 states and 13037 transitions. [2020-10-29 13:32:01,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 13:32:01,565 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 98 [2020-10-29 13:32:01,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:32:01,590 INFO L225 Difference]: With dead ends: 8565 [2020-10-29 13:32:01,590 INFO L226 Difference]: Without dead ends: 5609 [2020-10-29 13:32:01,597 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:32:01,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5609 states. [2020-10-29 13:32:02,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5609 to 5599. [2020-10-29 13:32:02,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5599 states. [2020-10-29 13:32:02,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5599 states to 5599 states and 8454 transitions. [2020-10-29 13:32:02,431 INFO L78 Accepts]: Start accepts. Automaton has 5599 states and 8454 transitions. Word has length 98 [2020-10-29 13:32:02,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:32:02,432 INFO L481 AbstractCegarLoop]: Abstraction has 5599 states and 8454 transitions. [2020-10-29 13:32:02,432 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 13:32:02,432 INFO L276 IsEmpty]: Start isEmpty. Operand 5599 states and 8454 transitions. [2020-10-29 13:32:02,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-10-29 13:32:02,433 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:32:02,433 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:32:02,433 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-29 13:32:02,433 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:32:02,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:32:02,434 INFO L82 PathProgramCache]: Analyzing trace with hash 535042435, now seen corresponding path program 1 times [2020-10-29 13:32:02,434 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:32:02,434 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [921063730] [2020-10-29 13:32:02,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:32:02,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:32:02,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:32:02,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:32:02,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:32:02,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:32:03,801 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:32:03,801 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 107 [2020-10-29 13:32:03,801 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 13:32:03,801 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1341 [2020-10-29 13:32:03,802 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:32:03,802 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:32:03,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:32:03,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 13:32:03,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-29 13:32:03,802 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:32:04,528 WARN L193 SmtUtils]: Spent 631.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-10-29 13:32:04,529 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:32:04,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:32:04,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:32:04,564 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:32:04,564 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:32:04,564 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:32:04,565 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-29 13:32:04,565 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:32:04,565 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:32:04,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:32:04,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:32:04,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 13:32:04,566 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:32:04,605 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:32:04,605 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [921063730] [2020-10-29 13:32:04,605 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:32:04,605 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 13:32:04,606 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831383773] [2020-10-29 13:32:04,606 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:32:04,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:32:04,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:32:04,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:32:04,607 INFO L87 Difference]: Start difference. First operand 5599 states and 8454 transitions. Second operand 6 states. [2020-10-29 13:32:05,348 WARN L193 SmtUtils]: Spent 653.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2020-10-29 13:32:07,260 WARN L193 SmtUtils]: Spent 774.00 ms on a formula simplification that was a NOOP. DAG size: 209 [2020-10-29 13:32:08,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:32:08,723 INFO L93 Difference]: Finished difference Result 16597 states and 25098 transitions. [2020-10-29 13:32:08,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-29 13:32:08,723 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 99 [2020-10-29 13:32:08,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:32:08,748 INFO L225 Difference]: With dead ends: 16597 [2020-10-29 13:32:08,748 INFO L226 Difference]: Without dead ends: 11074 [2020-10-29 13:32:08,759 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-10-29 13:32:08,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11074 states. [2020-10-29 13:32:10,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11074 to 11071. [2020-10-29 13:32:10,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11071 states. [2020-10-29 13:32:10,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11071 states to 11071 states and 16678 transitions. [2020-10-29 13:32:10,438 INFO L78 Accepts]: Start accepts. Automaton has 11071 states and 16678 transitions. Word has length 99 [2020-10-29 13:32:10,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:32:10,438 INFO L481 AbstractCegarLoop]: Abstraction has 11071 states and 16678 transitions. [2020-10-29 13:32:10,438 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:32:10,439 INFO L276 IsEmpty]: Start isEmpty. Operand 11071 states and 16678 transitions. [2020-10-29 13:32:10,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-10-29 13:32:10,439 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:32:10,439 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:32:10,440 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-29 13:32:10,440 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:32:10,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:32:10,440 INFO L82 PathProgramCache]: Analyzing trace with hash -1638896002, now seen corresponding path program 1 times [2020-10-29 13:32:10,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:32:10,441 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1108447151] [2020-10-29 13:32:10,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:32:10,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:32:10,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:32:10,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:32:10,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:32:10,998 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:32:10,998 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 107 [2020-10-29 13:32:10,998 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 13:32:10,999 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 529 [2020-10-29 13:32:10,999 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:32:10,999 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:32:10,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:32:10,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-29 13:32:10,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-29 13:32:10,999 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:32:11,707 WARN L193 SmtUtils]: Spent 661.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-10-29 13:32:11,708 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:32:11,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:32:11,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:32:11,729 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:32:11,729 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:32:11,729 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:32:11,729 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-29 13:32:11,729 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:32:11,730 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:32:11,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:32:11,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:32:11,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:32:11,730 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:32:11,758 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:32:11,759 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1108447151] [2020-10-29 13:32:11,759 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:32:11,759 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 13:32:11,759 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765154746] [2020-10-29 13:32:11,760 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 13:32:11,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:32:11,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 13:32:11,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 13:32:11,766 INFO L87 Difference]: Start difference. First operand 11071 states and 16678 transitions. Second operand 4 states. [2020-10-29 13:32:12,520 WARN L193 SmtUtils]: Spent 691.00 ms on a formula simplification that was a NOOP. DAG size: 206 [2020-10-29 13:32:16,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:32:16,553 INFO L93 Difference]: Finished difference Result 31525 states and 47370 transitions. [2020-10-29 13:32:16,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 13:32:16,554 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 99 [2020-10-29 13:32:16,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:32:16,594 INFO L225 Difference]: With dead ends: 31525 [2020-10-29 13:32:16,594 INFO L226 Difference]: Without dead ends: 20529 [2020-10-29 13:32:16,612 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:32:16,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20529 states. [2020-10-29 13:32:19,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20529 to 20519. [2020-10-29 13:32:19,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20519 states. [2020-10-29 13:32:19,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20519 states to 20519 states and 30571 transitions. [2020-10-29 13:32:19,968 INFO L78 Accepts]: Start accepts. Automaton has 20519 states and 30571 transitions. Word has length 99 [2020-10-29 13:32:19,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:32:19,968 INFO L481 AbstractCegarLoop]: Abstraction has 20519 states and 30571 transitions. [2020-10-29 13:32:19,968 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 13:32:19,968 INFO L276 IsEmpty]: Start isEmpty. Operand 20519 states and 30571 transitions. [2020-10-29 13:32:19,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-10-29 13:32:19,969 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:32:19,969 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:32:19,970 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-29 13:32:19,970 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:32:19,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:32:19,970 INFO L82 PathProgramCache]: Analyzing trace with hash -1532426576, now seen corresponding path program 1 times [2020-10-29 13:32:19,971 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:32:19,971 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [6306142] [2020-10-29 13:32:19,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:32:19,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:32:20,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:32:20,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:32:20,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:32:20,958 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:32:20,958 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 108 [2020-10-29 13:32:20,958 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 13:32:20,958 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 959 [2020-10-29 13:32:20,958 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:32:20,958 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:32:20,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:32:20,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-29 13:32:20,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-29 13:32:20,959 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:32:21,692 WARN L193 SmtUtils]: Spent 691.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-10-29 13:32:21,693 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:32:21,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:32:21,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:32:21,713 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:32:21,713 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:32:21,714 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:32:21,714 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-29 13:32:21,714 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:32:21,714 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:32:21,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:32:21,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:32:21,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:32:21,715 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:32:21,746 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:32:21,747 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [6306142] [2020-10-29 13:32:21,747 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:32:21,747 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 13:32:21,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758268957] [2020-10-29 13:32:21,748 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 13:32:21,748 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:32:21,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 13:32:21,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 13:32:21,749 INFO L87 Difference]: Start difference. First operand 20519 states and 30571 transitions. Second operand 4 states. [2020-10-29 13:32:22,536 WARN L193 SmtUtils]: Spent 719.00 ms on a formula simplification that was a NOOP. DAG size: 206 [2020-10-29 13:32:29,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:32:29,096 INFO L93 Difference]: Finished difference Result 58349 states and 86575 transitions. [2020-10-29 13:32:29,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 13:32:29,097 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 100 [2020-10-29 13:32:29,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:32:29,169 INFO L225 Difference]: With dead ends: 58349 [2020-10-29 13:32:29,170 INFO L226 Difference]: Without dead ends: 37895 [2020-10-29 13:32:29,209 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:32:29,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37895 states. [2020-10-29 13:32:35,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37895 to 37886. [2020-10-29 13:32:35,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37886 states. [2020-10-29 13:32:35,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37886 states to 37886 states and 55677 transitions. [2020-10-29 13:32:35,703 INFO L78 Accepts]: Start accepts. Automaton has 37886 states and 55677 transitions. Word has length 100 [2020-10-29 13:32:35,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:32:35,703 INFO L481 AbstractCegarLoop]: Abstraction has 37886 states and 55677 transitions. [2020-10-29 13:32:35,703 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 13:32:35,703 INFO L276 IsEmpty]: Start isEmpty. Operand 37886 states and 55677 transitions. [2020-10-29 13:32:35,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-10-29 13:32:35,704 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:32:35,704 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:32:35,704 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-29 13:32:35,704 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:32:35,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:32:35,704 INFO L82 PathProgramCache]: Analyzing trace with hash 1459802247, now seen corresponding path program 1 times [2020-10-29 13:32:35,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:32:35,705 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [132146422] [2020-10-29 13:32:35,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:32:35,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:32:35,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:32:35,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:32:35,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:32:36,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:32:38,113 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:32:38,113 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 109 [2020-10-29 13:32:38,113 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 13:32:38,113 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2379 [2020-10-29 13:32:38,114 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:32:38,114 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:32:38,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:32:38,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 13:32:38,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-29 13:32:38,114 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:32:38,894 WARN L193 SmtUtils]: Spent 681.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-10-29 13:32:38,895 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:32:38,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:32:38,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:32:38,935 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:32:38,936 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:32:38,936 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:32:38,936 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-10-29 13:32:38,936 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:32:38,936 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:32:38,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:32:38,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:32:38,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 13:32:38,937 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:32:38,972 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:32:38,972 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [132146422] [2020-10-29 13:32:38,972 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:32:38,972 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 13:32:38,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589378054] [2020-10-29 13:32:38,973 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:32:38,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:32:38,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:32:38,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:32:38,974 INFO L87 Difference]: Start difference. First operand 37886 states and 55677 transitions. Second operand 6 states. [2020-10-29 13:32:39,809 WARN L193 SmtUtils]: Spent 743.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2020-10-29 13:32:42,789 WARN L193 SmtUtils]: Spent 663.00 ms on a formula simplification that was a NOOP. DAG size: 209 [2020-10-29 13:32:53,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:32:53,433 INFO L93 Difference]: Finished difference Result 113156 states and 166145 transitions. [2020-10-29 13:32:53,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-29 13:32:53,433 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 101 [2020-10-29 13:32:53,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:32:53,564 INFO L225 Difference]: With dead ends: 113156 [2020-10-29 13:32:53,565 INFO L226 Difference]: Without dead ends: 75329 [2020-10-29 13:32:53,626 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-10-29 13:32:53,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75329 states. [2020-10-29 13:33:05,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75329 to 75326. [2020-10-29 13:33:05,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75326 states. [2020-10-29 13:33:05,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75326 states to 75326 states and 110141 transitions. [2020-10-29 13:33:05,867 INFO L78 Accepts]: Start accepts. Automaton has 75326 states and 110141 transitions. Word has length 101 [2020-10-29 13:33:05,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:33:05,868 INFO L481 AbstractCegarLoop]: Abstraction has 75326 states and 110141 transitions. [2020-10-29 13:33:05,868 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:33:05,868 INFO L276 IsEmpty]: Start isEmpty. Operand 75326 states and 110141 transitions. [2020-10-29 13:33:05,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-10-29 13:33:05,868 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:33:05,868 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:33:05,868 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-29 13:33:05,868 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:33:05,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:33:05,869 INFO L82 PathProgramCache]: Analyzing trace with hash -8691604, now seen corresponding path program 1 times [2020-10-29 13:33:05,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:33:05,869 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1132051828] [2020-10-29 13:33:05,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:33:05,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:33:05,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:33:06,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:33:06,726 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:33:06,727 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 109 [2020-10-29 13:33:06,727 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 13:33:06,727 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 826 [2020-10-29 13:33:06,727 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:33:06,727 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:33:06,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:33:06,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 13:33:06,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-29 13:33:06,728 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:33:07,445 WARN L193 SmtUtils]: Spent 601.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-10-29 13:33:07,446 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:33:07,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:33:07,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:33:07,473 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:33:07,473 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:33:07,473 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:33:07,473 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-29 13:33:07,473 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:33:07,473 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:33:07,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:33:07,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:33:07,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 13:33:07,474 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:33:07,499 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:33:07,499 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1132051828] [2020-10-29 13:33:07,499 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:33:07,499 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 13:33:07,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908758884] [2020-10-29 13:33:07,500 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:33:07,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:33:07,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:33:07,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:33:07,501 INFO L87 Difference]: Start difference. First operand 75326 states and 110141 transitions. Second operand 6 states. [2020-10-29 13:33:08,311 WARN L193 SmtUtils]: Spent 720.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2020-10-29 13:33:11,645 WARN L193 SmtUtils]: Spent 662.00 ms on a formula simplification that was a NOOP. DAG size: 209