/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.6 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.8.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 18:48:41,198 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 18:48:41,200 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 18:48:41,235 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 18:48:41,236 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 18:48:41,237 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 18:48:41,239 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 18:48:41,241 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 18:48:41,243 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 18:48:41,245 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 18:48:41,246 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 18:48:41,247 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 18:48:41,248 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 18:48:41,249 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 18:48:41,250 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 18:48:41,252 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 18:48:41,253 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 18:48:41,254 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 18:48:41,256 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 18:48:41,258 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 18:48:41,260 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 18:48:41,261 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 18:48:41,263 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 18:48:41,264 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 18:48:41,267 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 18:48:41,268 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 18:48:41,268 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 18:48:41,269 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 18:48:41,270 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 18:48:41,271 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 18:48:41,271 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 18:48:41,272 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 18:48:41,273 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 18:48:41,274 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 18:48:41,275 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 18:48:41,275 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 18:48:41,276 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 18:48:41,276 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 18:48:41,277 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 18:48:41,278 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 18:48:41,279 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 18:48:41,280 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-28 18:48:41,317 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 18:48:41,317 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 18:48:41,319 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 18:48:41,319 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 18:48:41,319 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 18:48:41,320 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 18:48:41,320 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 18:48:41,320 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 18:48:41,320 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 18:48:41,320 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 18:48:41,321 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 18:48:41,321 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 18:48:41,321 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 18:48:41,321 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 18:48:41,321 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 18:48:41,322 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 18:48:41,322 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 18:48:41,322 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 18:48:41,322 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 18:48:41,323 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 18:48:41,323 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 18:48:41,323 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 18:48:41,323 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 18:48:41,323 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 18:48:41,324 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 18:48:41,324 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 18:48:41,324 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 18:48:41,324 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 18:48:41,324 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 18:48:41,324 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 18:48:41,727 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 18:48:41,752 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 18:48:41,755 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 18:48:41,757 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 18:48:41,758 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 18:48:41,759 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.8.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-28 18:48:41,856 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3963ba4a1/8137d7ce3b6947a8b58cc32652609758/FLAG9f2bf2bbe [2020-10-28 18:48:42,519 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 18:48:42,519 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.8.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-28 18:48:42,537 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3963ba4a1/8137d7ce3b6947a8b58cc32652609758/FLAG9f2bf2bbe [2020-10-28 18:48:42,828 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3963ba4a1/8137d7ce3b6947a8b58cc32652609758 [2020-10-28 18:48:42,831 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 18:48:42,839 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 18:48:42,845 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 18:48:42,845 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 18:48:42,849 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 18:48:42,850 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 06:48:42" (1/1) ... [2020-10-28 18:48:42,854 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@a0ef744 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:48:42, skipping insertion in model container [2020-10-28 18:48:42,855 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 06:48:42" (1/1) ... [2020-10-28 18:48:42,863 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 18:48:42,937 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 18:48:43,237 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 18:48:43,260 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 18:48:43,399 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 18:48:43,446 INFO L208 MainTranslator]: Completed translation [2020-10-28 18:48:43,448 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:48:43 WrapperNode [2020-10-28 18:48:43,448 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 18:48:43,451 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 18:48:43,451 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 18:48:43,452 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 18:48:43,467 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:48:43" (1/1) ... [2020-10-28 18:48:43,469 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:48:43" (1/1) ... [2020-10-28 18:48:43,505 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:48:43" (1/1) ... [2020-10-28 18:48:43,505 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:48:43" (1/1) ... [2020-10-28 18:48:43,553 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:48:43" (1/1) ... [2020-10-28 18:48:43,576 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:48:43" (1/1) ... [2020-10-28 18:48:43,580 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:48:43" (1/1) ... [2020-10-28 18:48:43,585 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 18:48:43,587 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 18:48:43,587 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 18:48:43,587 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 18:48:43,588 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:48:43" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 18:48:43,667 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 18:48:43,667 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 18:48:43,667 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 18:48:43,667 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-28 18:48:43,668 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 18:48:43,668 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 18:48:43,668 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 18:48:43,668 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 18:48:43,668 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 18:48:43,669 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-28 18:48:43,669 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-28 18:48:43,669 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-10-28 18:48:43,669 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-28 18:48:43,669 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-28 18:48:43,669 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-28 18:48:43,670 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-28 18:48:43,670 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-28 18:48:43,670 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-28 18:48:43,670 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-28 18:48:43,670 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-28 18:48:43,671 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-10-28 18:48:43,671 INFO L130 BoogieDeclarations]: Found specification of procedure node6 [2020-10-28 18:48:43,671 INFO L130 BoogieDeclarations]: Found specification of procedure node7 [2020-10-28 18:48:43,671 INFO L130 BoogieDeclarations]: Found specification of procedure node8 [2020-10-28 18:48:43,671 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-28 18:48:43,671 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-28 18:48:43,671 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 18:48:43,672 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 18:48:43,672 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 18:48:43,672 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 18:48:43,672 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 18:48:43,672 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 18:48:43,672 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 18:48:44,806 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 18:48:44,806 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-28 18:48:44,808 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 06:48:44 BoogieIcfgContainer [2020-10-28 18:48:44,809 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 18:48:44,811 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 18:48:44,811 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 18:48:44,814 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 18:48:44,815 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 06:48:42" (1/3) ... [2020-10-28 18:48:44,815 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c67c4e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 06:48:44, skipping insertion in model container [2020-10-28 18:48:44,816 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:48:43" (2/3) ... [2020-10-28 18:48:44,816 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c67c4e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 06:48:44, skipping insertion in model container [2020-10-28 18:48:44,816 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 06:48:44" (3/3) ... [2020-10-28 18:48:44,818 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.8.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-28 18:48:44,829 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 18:48:44,835 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 18:48:44,848 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 18:48:44,876 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 18:48:44,876 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 18:48:44,876 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 18:48:44,876 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 18:48:44,876 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 18:48:44,877 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 18:48:44,877 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 18:48:44,877 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 18:48:44,899 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states. [2020-10-28 18:48:44,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-10-28 18:48:44,912 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:48:44,913 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:48:44,913 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:48:44,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:48:44,919 INFO L82 PathProgramCache]: Analyzing trace with hash -1935783955, now seen corresponding path program 1 times [2020-10-28 18:48:44,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:48:44,929 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1819676397] [2020-10-28 18:48:44,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:48:45,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:48:45,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:48:45,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:48:45,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:48:45,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:48:46,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:48:48,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:48:48,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:48:50,374 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:48:50,374 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 115 [2020-10-28 18:48:50,375 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 18:48:50,375 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5033 [2020-10-28 18:48:50,378 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:48:50,379 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:48:50,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:48:50,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-28 18:48:50,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-28 18:48:50,380 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 18:48:51,220 WARN L193 SmtUtils]: Spent 679.00 ms on a formula simplification that was a NOOP. DAG size: 220 [2020-10-28 18:48:51,224 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:48:51,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:48:51,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:48:51,254 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:48:51,255 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:48:51,255 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:48:51,255 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-28 18:48:51,255 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:48:51,255 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:48:51,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:48:51,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:48:51,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:48:51,256 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:48:51,306 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:48:51,306 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1819676397] [2020-10-28 18:48:51,309 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:48:51,309 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 18:48:51,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528569622] [2020-10-28 18:48:51,315 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 18:48:51,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:48:51,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 18:48:51,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 18:48:51,333 INFO L87 Difference]: Start difference. First operand 168 states. Second operand 4 states. [2020-10-28 18:48:52,090 WARN L193 SmtUtils]: Spent 666.00 ms on a formula simplification that was a NOOP. DAG size: 224 [2020-10-28 18:48:53,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:48:53,368 INFO L93 Difference]: Finished difference Result 354 states and 575 transitions. [2020-10-28 18:48:53,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 18:48:53,370 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 107 [2020-10-28 18:48:53,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:48:53,384 INFO L225 Difference]: With dead ends: 354 [2020-10-28 18:48:53,384 INFO L226 Difference]: Without dead ends: 246 [2020-10-28 18:48:53,388 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:48:53,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2020-10-28 18:48:53,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 243. [2020-10-28 18:48:53,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 243 states. [2020-10-28 18:48:53,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 346 transitions. [2020-10-28 18:48:53,468 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 346 transitions. Word has length 107 [2020-10-28 18:48:53,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:48:53,469 INFO L481 AbstractCegarLoop]: Abstraction has 243 states and 346 transitions. [2020-10-28 18:48:53,469 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 18:48:53,469 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 346 transitions. [2020-10-28 18:48:53,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-10-28 18:48:53,478 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:48:53,478 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:48:53,479 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 18:48:53,479 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:48:53,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:48:53,480 INFO L82 PathProgramCache]: Analyzing trace with hash -1222667673, now seen corresponding path program 1 times [2020-10-28 18:48:53,480 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:48:53,480 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [331788923] [2020-10-28 18:48:53,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:48:53,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:48:53,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:48:53,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:48:53,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:48:53,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:48:54,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:48:55,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:48:58,540 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:48:58,541 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 116 [2020-10-28 18:48:58,541 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 18:48:58,541 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-28 18:48:58,542 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:48:58,542 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:48:58,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:48:58,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 36 [2020-10-28 18:48:58,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-28 18:48:58,543 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:48:58,994 WARN L193 SmtUtils]: Spent 376.00 ms on a formula simplification that was a NOOP. DAG size: 220 [2020-10-28 18:48:58,996 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:48:59,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:48:59,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:48:59,020 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:48:59,020 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:48:59,020 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:48:59,021 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-28 18:48:59,021 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:48:59,021 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:48:59,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:48:59,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:48:59,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:48:59,022 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:48:59,063 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:48:59,063 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [331788923] [2020-10-28 18:48:59,063 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:48:59,064 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 18:48:59,064 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328145331] [2020-10-28 18:48:59,066 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 18:48:59,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:48:59,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 18:48:59,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 18:48:59,067 INFO L87 Difference]: Start difference. First operand 243 states and 346 transitions. Second operand 4 states. [2020-10-28 18:48:59,543 WARN L193 SmtUtils]: Spent 436.00 ms on a formula simplification that was a NOOP. DAG size: 224 [2020-10-28 18:49:00,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:49:00,501 INFO L93 Difference]: Finished difference Result 577 states and 876 transitions. [2020-10-28 18:49:00,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 18:49:00,502 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 108 [2020-10-28 18:49:00,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:49:00,507 INFO L225 Difference]: With dead ends: 577 [2020-10-28 18:49:00,507 INFO L226 Difference]: Without dead ends: 402 [2020-10-28 18:49:00,510 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:49:00,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2020-10-28 18:49:00,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 399. [2020-10-28 18:49:00,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 399 states. [2020-10-28 18:49:00,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 399 states to 399 states and 594 transitions. [2020-10-28 18:49:00,558 INFO L78 Accepts]: Start accepts. Automaton has 399 states and 594 transitions. Word has length 108 [2020-10-28 18:49:00,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:49:00,559 INFO L481 AbstractCegarLoop]: Abstraction has 399 states and 594 transitions. [2020-10-28 18:49:00,559 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 18:49:00,559 INFO L276 IsEmpty]: Start isEmpty. Operand 399 states and 594 transitions. [2020-10-28 18:49:00,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-10-28 18:49:00,561 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:49:00,562 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:49:00,562 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 18:49:00,562 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:49:00,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:49:00,563 INFO L82 PathProgramCache]: Analyzing trace with hash 19091516, now seen corresponding path program 1 times [2020-10-28 18:49:00,563 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:49:00,563 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [877826461] [2020-10-28 18:49:00,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:49:00,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:49:00,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:49:00,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:49:00,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:49:00,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:49:01,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:49:01,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:49:02,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:49:05,627 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:49:05,628 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 117 [2020-10-28 18:49:05,628 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 18:49:05,628 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5020 [2020-10-28 18:49:05,628 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:49:05,629 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:49:05,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:49:05,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 40 [2020-10-28 18:49:05,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 63 [2020-10-28 18:49:05,629 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:49:06,057 WARN L193 SmtUtils]: Spent 356.00 ms on a formula simplification that was a NOOP. DAG size: 220 [2020-10-28 18:49:06,062 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:49:06,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:49:06,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:49:06,113 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:49:06,114 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:49:06,114 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:49:06,114 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 42 [2020-10-28 18:49:06,114 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:49:06,114 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:49:06,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:49:06,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:49:06,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:49:06,115 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:49:06,161 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:49:06,161 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [877826461] [2020-10-28 18:49:06,161 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:49:06,161 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 18:49:06,162 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130534582] [2020-10-28 18:49:06,164 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 18:49:06,164 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:49:06,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 18:49:06,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 18:49:06,167 INFO L87 Difference]: Start difference. First operand 399 states and 594 transitions. Second operand 4 states. [2020-10-28 18:49:06,604 WARN L193 SmtUtils]: Spent 395.00 ms on a formula simplification that was a NOOP. DAG size: 224 [2020-10-28 18:49:07,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:49:07,581 INFO L93 Difference]: Finished difference Result 1029 states and 1594 transitions. [2020-10-28 18:49:07,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 18:49:07,582 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 109 [2020-10-28 18:49:07,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:49:07,587 INFO L225 Difference]: With dead ends: 1029 [2020-10-28 18:49:07,588 INFO L226 Difference]: Without dead ends: 698 [2020-10-28 18:49:07,591 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:49:07,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 698 states. [2020-10-28 18:49:07,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 698 to 695. [2020-10-28 18:49:07,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 695 states. [2020-10-28 18:49:07,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 695 states to 695 states and 1062 transitions. [2020-10-28 18:49:07,654 INFO L78 Accepts]: Start accepts. Automaton has 695 states and 1062 transitions. Word has length 109 [2020-10-28 18:49:07,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:49:07,655 INFO L481 AbstractCegarLoop]: Abstraction has 695 states and 1062 transitions. [2020-10-28 18:49:07,655 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 18:49:07,655 INFO L276 IsEmpty]: Start isEmpty. Operand 695 states and 1062 transitions. [2020-10-28 18:49:07,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-10-28 18:49:07,658 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:49:07,658 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:49:07,658 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 18:49:07,659 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:49:07,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:49:07,659 INFO L82 PathProgramCache]: Analyzing trace with hash 26311322, now seen corresponding path program 1 times [2020-10-28 18:49:07,660 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:49:07,660 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [293885864] [2020-10-28 18:49:07,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:49:07,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:49:07,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:49:07,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:49:07,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:49:07,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:49:08,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:49:08,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:49:09,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:49:09,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:49:09,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:49:12,739 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:49:12,740 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 118 [2020-10-28 18:49:12,740 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-28 18:49:12,740 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5031 [2020-10-28 18:49:12,741 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:49:12,741 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:49:12,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:49:12,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 32 [2020-10-28 18:49:12,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-28 18:49:12,742 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:49:13,228 WARN L193 SmtUtils]: Spent 387.00 ms on a formula simplification that was a NOOP. DAG size: 220 [2020-10-28 18:49:13,230 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:49:13,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:49:13,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:49:13,263 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:49:13,264 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:49:13,264 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:49:13,264 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-28 18:49:13,265 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:49:13,265 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:49:13,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:49:13,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:49:13,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:49:13,266 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:49:13,325 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:49:13,325 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [293885864] [2020-10-28 18:49:13,326 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:49:13,326 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 18:49:13,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788003591] [2020-10-28 18:49:13,327 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 18:49:13,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:49:13,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 18:49:13,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 18:49:13,328 INFO L87 Difference]: Start difference. First operand 695 states and 1062 transitions. Second operand 4 states. [2020-10-28 18:49:13,803 WARN L193 SmtUtils]: Spent 421.00 ms on a formula simplification that was a NOOP. DAG size: 224 [2020-10-28 18:49:14,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:49:14,795 INFO L93 Difference]: Finished difference Result 1885 states and 2946 transitions. [2020-10-28 18:49:14,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 18:49:14,795 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 110 [2020-10-28 18:49:14,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:49:14,809 INFO L225 Difference]: With dead ends: 1885 [2020-10-28 18:49:14,809 INFO L226 Difference]: Without dead ends: 1258 [2020-10-28 18:49:14,811 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:49:14,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1258 states. [2020-10-28 18:49:14,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1258 to 1255. [2020-10-28 18:49:14,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1255 states. [2020-10-28 18:49:14,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1255 states to 1255 states and 1942 transitions. [2020-10-28 18:49:14,913 INFO L78 Accepts]: Start accepts. Automaton has 1255 states and 1942 transitions. Word has length 110 [2020-10-28 18:49:14,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:49:14,914 INFO L481 AbstractCegarLoop]: Abstraction has 1255 states and 1942 transitions. [2020-10-28 18:49:14,914 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 18:49:14,914 INFO L276 IsEmpty]: Start isEmpty. Operand 1255 states and 1942 transitions. [2020-10-28 18:49:14,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-10-28 18:49:14,926 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:49:14,926 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:49:14,927 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 18:49:14,927 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:49:14,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:49:14,928 INFO L82 PathProgramCache]: Analyzing trace with hash 918992080, now seen corresponding path program 1 times [2020-10-28 18:49:14,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:49:14,928 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [187287134] [2020-10-28 18:49:14,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:49:14,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:49:15,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:49:15,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:49:15,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:49:15,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:49:15,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:49:16,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:49:16,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:49:16,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:49:18,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:49:18,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:49:18,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:49:19,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:49:19,991 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:49:19,991 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 119 [2020-10-28 18:49:19,992 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-28 18:49:19,992 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-28 18:49:19,992 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:49:19,992 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:49:19,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:49:19,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-28 18:49:19,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-28 18:49:19,993 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:49:20,421 WARN L193 SmtUtils]: Spent 369.00 ms on a formula simplification that was a NOOP. DAG size: 220 [2020-10-28 18:49:20,422 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:49:20,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:49:20,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:49:20,448 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:49:20,449 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:49:20,449 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:49:20,449 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-28 18:49:20,449 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:49:20,449 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:49:20,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:49:20,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:49:20,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:49:20,450 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:49:20,486 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:49:20,486 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [187287134] [2020-10-28 18:49:20,487 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:49:20,487 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 18:49:20,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445053609] [2020-10-28 18:49:20,487 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 18:49:20,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:49:20,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 18:49:20,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 18:49:20,489 INFO L87 Difference]: Start difference. First operand 1255 states and 1942 transitions. Second operand 4 states. [2020-10-28 18:49:20,981 WARN L193 SmtUtils]: Spent 449.00 ms on a formula simplification that was a NOOP. DAG size: 224 [2020-10-28 18:49:22,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:49:22,034 INFO L93 Difference]: Finished difference Result 3501 states and 5482 transitions. [2020-10-28 18:49:22,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 18:49:22,035 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 111 [2020-10-28 18:49:22,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:49:22,049 INFO L225 Difference]: With dead ends: 3501 [2020-10-28 18:49:22,050 INFO L226 Difference]: Without dead ends: 2314 [2020-10-28 18:49:22,054 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:49:22,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2314 states. [2020-10-28 18:49:22,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2314 to 2311. [2020-10-28 18:49:22,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2311 states. [2020-10-28 18:49:22,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2311 states to 2311 states and 3590 transitions. [2020-10-28 18:49:22,184 INFO L78 Accepts]: Start accepts. Automaton has 2311 states and 3590 transitions. Word has length 111 [2020-10-28 18:49:22,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:49:22,184 INFO L481 AbstractCegarLoop]: Abstraction has 2311 states and 3590 transitions. [2020-10-28 18:49:22,184 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 18:49:22,185 INFO L276 IsEmpty]: Start isEmpty. Operand 2311 states and 3590 transitions. [2020-10-28 18:49:22,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-10-28 18:49:22,186 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:49:22,186 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:49:22,186 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 18:49:22,186 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:49:22,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:49:22,187 INFO L82 PathProgramCache]: Analyzing trace with hash -1362241448, now seen corresponding path program 1 times [2020-10-28 18:49:22,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:49:22,187 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1257562732] [2020-10-28 18:49:22,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:49:22,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:49:22,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:49:22,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:49:22,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:49:22,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:49:22,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:49:22,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:49:23,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:49:25,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:49:25,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:49:25,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:49:25,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:49:27,247 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:49:27,247 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 120 [2020-10-28 18:49:27,248 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-28 18:49:27,248 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5022 [2020-10-28 18:49:27,248 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:49:27,248 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:49:27,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:49:27,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 18:49:27,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-28 18:49:27,249 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:49:27,646 WARN L193 SmtUtils]: Spent 344.00 ms on a formula simplification that was a NOOP. DAG size: 220 [2020-10-28 18:49:27,647 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:49:27,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:49:27,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:49:27,667 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:49:27,667 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:49:27,667 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:49:27,668 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-28 18:49:27,668 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:49:27,668 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:49:27,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:49:27,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:49:27,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:49:27,668 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:49:27,707 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:49:27,708 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1257562732] [2020-10-28 18:49:27,710 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:49:27,710 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 18:49:27,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592065410] [2020-10-28 18:49:27,710 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 18:49:27,711 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:49:27,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 18:49:27,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 18:49:27,711 INFO L87 Difference]: Start difference. First operand 2311 states and 3590 transitions. Second operand 4 states. [2020-10-28 18:49:28,122 WARN L193 SmtUtils]: Spent 374.00 ms on a formula simplification that was a NOOP. DAG size: 224 [2020-10-28 18:49:29,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:49:29,243 INFO L93 Difference]: Finished difference Result 6541 states and 10218 transitions. [2020-10-28 18:49:29,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 18:49:29,244 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 112 [2020-10-28 18:49:29,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:49:29,267 INFO L225 Difference]: With dead ends: 6541 [2020-10-28 18:49:29,268 INFO L226 Difference]: Without dead ends: 4298 [2020-10-28 18:49:29,274 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:49:29,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4298 states. [2020-10-28 18:49:29,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4298 to 4295. [2020-10-28 18:49:29,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4295 states. [2020-10-28 18:49:29,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4295 states to 4295 states and 6662 transitions. [2020-10-28 18:49:29,550 INFO L78 Accepts]: Start accepts. Automaton has 4295 states and 6662 transitions. Word has length 112 [2020-10-28 18:49:29,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:49:29,550 INFO L481 AbstractCegarLoop]: Abstraction has 4295 states and 6662 transitions. [2020-10-28 18:49:29,550 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 18:49:29,551 INFO L276 IsEmpty]: Start isEmpty. Operand 4295 states and 6662 transitions. [2020-10-28 18:49:29,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-10-28 18:49:29,552 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:49:29,553 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:49:29,553 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 18:49:29,553 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:49:29,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:49:29,554 INFO L82 PathProgramCache]: Analyzing trace with hash -841024552, now seen corresponding path program 1 times [2020-10-28 18:49:29,554 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:49:29,554 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1821238989] [2020-10-28 18:49:29,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:49:29,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:49:29,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:49:29,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:49:29,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:49:29,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:49:29,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:49:30,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:49:30,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:49:32,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:49:32,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:49:33,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:49:33,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:49:34,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:49:34,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:49:34,602 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:49:34,602 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 121 [2020-10-28 18:49:34,602 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-28 18:49:34,602 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-28 18:49:34,602 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:49:34,602 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:49:34,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:49:34,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 44 [2020-10-28 18:49:34,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 67 [2020-10-28 18:49:34,603 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:49:35,017 WARN L193 SmtUtils]: Spent 373.00 ms on a formula simplification that was a NOOP. DAG size: 220 [2020-10-28 18:49:35,019 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:49:35,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:49:35,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:49:35,036 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:49:35,036 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:49:35,036 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:49:35,036 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-28 18:49:35,036 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:49:35,037 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:49:35,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:49:35,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:49:35,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:49:35,037 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:49:35,074 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:49:35,074 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1821238989] [2020-10-28 18:49:35,074 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:49:35,074 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 18:49:35,075 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413388008] [2020-10-28 18:49:35,075 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 18:49:35,075 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:49:35,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 18:49:35,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 18:49:35,076 INFO L87 Difference]: Start difference. First operand 4295 states and 6662 transitions. Second operand 4 states. [2020-10-28 18:49:35,508 WARN L193 SmtUtils]: Spent 392.00 ms on a formula simplification that was a NOOP. DAG size: 224 [2020-10-28 18:49:36,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:49:36,645 INFO L93 Difference]: Finished difference Result 12237 states and 19018 transitions. [2020-10-28 18:49:36,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 18:49:36,645 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 113 [2020-10-28 18:49:36,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:49:36,687 INFO L225 Difference]: With dead ends: 12237 [2020-10-28 18:49:36,687 INFO L226 Difference]: Without dead ends: 8010 [2020-10-28 18:49:36,699 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:49:36,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8010 states. [2020-10-28 18:49:37,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8010 to 8007. [2020-10-28 18:49:37,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8007 states. [2020-10-28 18:49:37,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8007 states to 8007 states and 12358 transitions. [2020-10-28 18:49:37,127 INFO L78 Accepts]: Start accepts. Automaton has 8007 states and 12358 transitions. Word has length 113 [2020-10-28 18:49:37,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:49:37,127 INFO L481 AbstractCegarLoop]: Abstraction has 8007 states and 12358 transitions. [2020-10-28 18:49:37,127 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 18:49:37,127 INFO L276 IsEmpty]: Start isEmpty. Operand 8007 states and 12358 transitions. [2020-10-28 18:49:37,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-10-28 18:49:37,128 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:49:37,129 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:49:37,129 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 18:49:37,129 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:49:37,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:49:37,130 INFO L82 PathProgramCache]: Analyzing trace with hash 1506419589, now seen corresponding path program 1 times [2020-10-28 18:49:37,130 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:49:37,131 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1268617218] [2020-10-28 18:49:37,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:49:37,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:49:37,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:49:37,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:49:37,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:49:37,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:49:37,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:49:37,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:49:37,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:49:39,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:49:39,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:49:39,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:49:40,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:49:42,177 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:49:42,177 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 122 [2020-10-28 18:49:42,177 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-28 18:49:42,177 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-28 18:49:42,177 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:49:42,177 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:49:42,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 18:49:42,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 18:49:42,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 102 [2020-10-28 18:49:42,178 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:49:42,705 WARN L193 SmtUtils]: Spent 396.00 ms on a formula simplification that was a NOOP. DAG size: 220 [2020-10-28 18:49:42,706 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:49:42,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:49:42,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:49:42,745 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:49:42,746 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:49:42,746 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:49:42,746 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-10-28 18:49:42,746 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:49:42,746 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:49:42,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:49:42,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:49:42,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 18:49:42,747 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:49:42,789 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:49:42,790 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1268617218] [2020-10-28 18:49:42,790 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:49:42,790 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:49:42,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336011423] [2020-10-28 18:49:42,791 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 18:49:42,791 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:49:42,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 18:49:42,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 18:49:42,792 INFO L87 Difference]: Start difference. First operand 8007 states and 12358 transitions. Second operand 6 states. [2020-10-28 18:49:43,308 WARN L193 SmtUtils]: Spent 446.00 ms on a formula simplification that was a NOOP. DAG size: 228 [2020-10-28 18:49:44,708 WARN L193 SmtUtils]: Spent 425.00 ms on a formula simplification that was a NOOP. DAG size: 226 [2020-10-28 18:49:45,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:49:45,417 INFO L93 Difference]: Finished difference Result 23821 states and 36810 transitions. [2020-10-28 18:49:45,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 18:49:45,419 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 114 [2020-10-28 18:49:45,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:49:45,508 INFO L225 Difference]: With dead ends: 23821 [2020-10-28 18:49:45,508 INFO L226 Difference]: Without dead ends: 15882 [2020-10-28 18:49:45,530 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-10-28 18:49:45,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15882 states. [2020-10-28 18:49:46,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15882 to 15879. [2020-10-28 18:49:46,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15879 states. [2020-10-28 18:49:46,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15879 states to 15879 states and 24454 transitions. [2020-10-28 18:49:46,394 INFO L78 Accepts]: Start accepts. Automaton has 15879 states and 24454 transitions. Word has length 114 [2020-10-28 18:49:46,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:49:46,395 INFO L481 AbstractCegarLoop]: Abstraction has 15879 states and 24454 transitions. [2020-10-28 18:49:46,395 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 18:49:46,395 INFO L276 IsEmpty]: Start isEmpty. Operand 15879 states and 24454 transitions. [2020-10-28 18:49:46,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-10-28 18:49:46,396 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:49:46,396 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:49:46,397 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 18:49:46,397 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:49:46,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:49:46,397 INFO L82 PathProgramCache]: Analyzing trace with hash 238047914, now seen corresponding path program 1 times [2020-10-28 18:49:46,398 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:49:46,399 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [997283044] [2020-10-28 18:49:46,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:49:46,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:49:46,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:49:46,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:49:46,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:49:46,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:49:46,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:49:46,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:49:47,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:49:49,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:49:49,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:49:49,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:49:50,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:49:51,445 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:49:51,446 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 122 [2020-10-28 18:49:51,446 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-28 18:49:51,446 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-28 18:49:51,446 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:49:51,446 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:49:51,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 18:49:51,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 18:49:51,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 97 [2020-10-28 18:49:51,447 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:49:51,885 WARN L193 SmtUtils]: Spent 371.00 ms on a formula simplification that was a NOOP. DAG size: 220 [2020-10-28 18:49:51,886 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:49:51,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:49:51,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:49:51,911 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:49:51,911 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:49:51,911 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:49:51,911 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-28 18:49:51,911 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:49:51,911 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:49:51,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:49:51,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:49:51,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 18:49:51,912 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:49:51,945 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:49:51,946 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [997283044] [2020-10-28 18:49:51,946 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:49:51,946 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:49:51,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125333307] [2020-10-28 18:49:51,947 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 18:49:51,947 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:49:51,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 18:49:51,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 18:49:51,948 INFO L87 Difference]: Start difference. First operand 15879 states and 24454 transitions. Second operand 6 states. [2020-10-28 18:49:52,403 WARN L193 SmtUtils]: Spent 398.00 ms on a formula simplification that was a NOOP. DAG size: 228 [2020-10-28 18:49:53,687 WARN L193 SmtUtils]: Spent 439.00 ms on a formula simplification that was a NOOP. DAG size: 226 [2020-10-28 18:49:54,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:49:54,501 INFO L93 Difference]: Finished difference Result 47373 states and 72970 transitions. [2020-10-28 18:49:54,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 18:49:54,502 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 114 [2020-10-28 18:49:54,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:49:54,583 INFO L225 Difference]: With dead ends: 47373 [2020-10-28 18:49:54,583 INFO L226 Difference]: Without dead ends: 31562 [2020-10-28 18:49:54,632 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-10-28 18:49:54,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31562 states. [2020-10-28 18:49:56,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31562 to 31559. [2020-10-28 18:49:56,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31559 states. [2020-10-28 18:49:56,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31559 states to 31559 states and 48454 transitions. [2020-10-28 18:49:56,108 INFO L78 Accepts]: Start accepts. Automaton has 31559 states and 48454 transitions. Word has length 114 [2020-10-28 18:49:56,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:49:56,108 INFO L481 AbstractCegarLoop]: Abstraction has 31559 states and 48454 transitions. [2020-10-28 18:49:56,108 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 18:49:56,108 INFO L276 IsEmpty]: Start isEmpty. Operand 31559 states and 48454 transitions. [2020-10-28 18:49:56,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-10-28 18:49:56,109 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:49:56,109 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:49:56,109 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 18:49:56,109 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:49:56,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:49:56,110 INFO L82 PathProgramCache]: Analyzing trace with hash -1670196571, now seen corresponding path program 1 times [2020-10-28 18:49:56,110 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:49:56,110 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2022812143] [2020-10-28 18:49:56,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:49:56,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:49:56,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:49:56,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:49:56,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:49:56,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:49:56,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:49:56,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:49:56,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:50:01,146 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:50:01,146 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 122 [2020-10-28 18:50:01,146 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 18:50:01,146 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-28 18:50:01,146 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:50:01,146 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:50:01,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 18:50:01,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 18:50:01,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 92 [2020-10-28 18:50:01,147 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:50:01,570 WARN L193 SmtUtils]: Spent 365.00 ms on a formula simplification that was a NOOP. DAG size: 220 [2020-10-28 18:50:01,571 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:50:01,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:50:01,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:50:01,597 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:50:01,597 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:50:01,597 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:50:01,597 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-28 18:50:01,597 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:50:01,597 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:50:01,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:50:01,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:50:01,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 18:50:01,598 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:50:01,629 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:50:01,630 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2022812143] [2020-10-28 18:50:01,630 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:50:01,630 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:50:01,630 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717757499] [2020-10-28 18:50:01,631 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 18:50:01,631 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:50:01,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 18:50:01,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 18:50:01,632 INFO L87 Difference]: Start difference. First operand 31559 states and 48454 transitions. Second operand 6 states. [2020-10-28 18:50:02,105 WARN L193 SmtUtils]: Spent 423.00 ms on a formula simplification that was a NOOP. DAG size: 226 [2020-10-28 18:50:03,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:50:03,900 INFO L93 Difference]: Finished difference Result 63050 states and 96840 transitions. [2020-10-28 18:50:03,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 18:50:03,901 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 114 [2020-10-28 18:50:03,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:50:03,964 INFO L225 Difference]: With dead ends: 63050 [2020-10-28 18:50:03,965 INFO L226 Difference]: Without dead ends: 31559 [2020-10-28 18:50:04,026 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-28 18:50:04,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31559 states. [2020-10-28 18:50:05,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31559 to 31559. [2020-10-28 18:50:05,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31559 states. [2020-10-28 18:50:05,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31559 states to 31559 states and 48198 transitions. [2020-10-28 18:50:05,562 INFO L78 Accepts]: Start accepts. Automaton has 31559 states and 48198 transitions. Word has length 114 [2020-10-28 18:50:05,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:50:05,562 INFO L481 AbstractCegarLoop]: Abstraction has 31559 states and 48198 transitions. [2020-10-28 18:50:05,562 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 18:50:05,562 INFO L276 IsEmpty]: Start isEmpty. Operand 31559 states and 48198 transitions. [2020-10-28 18:50:05,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-10-28 18:50:05,568 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:50:05,568 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:50:05,568 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 18:50:05,568 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:50:05,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:50:05,569 INFO L82 PathProgramCache]: Analyzing trace with hash 188225418, now seen corresponding path program 1 times [2020-10-28 18:50:05,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:50:05,569 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1114785402] [2020-10-28 18:50:05,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:50:05,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:50:05,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:50:05,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:50:05,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:50:05,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:50:09,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:50:09,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:50:09,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:50:10,618 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:50:10,619 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 122 [2020-10-28 18:50:10,619 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 18:50:10,619 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-28 18:50:10,619 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:50:10,619 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:50:10,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 18:50:10,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 18:50:10,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 107 [2020-10-28 18:50:10,619 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:50:11,093 WARN L193 SmtUtils]: Spent 391.00 ms on a formula simplification that was a NOOP. DAG size: 220 [2020-10-28 18:50:11,095 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:50:11,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:50:11,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:50:11,127 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:50:11,127 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:50:11,127 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:50:11,127 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-28 18:50:11,127 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:50:11,127 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:50:11,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:50:11,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:50:11,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 18:50:11,128 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:50:11,158 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:50:11,158 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1114785402] [2020-10-28 18:50:11,158 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:50:11,158 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:50:11,158 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110454899] [2020-10-28 18:50:11,159 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 18:50:11,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:50:11,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 18:50:11,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-28 18:50:11,160 INFO L87 Difference]: Start difference. First operand 31559 states and 48198 transitions. Second operand 6 states. [2020-10-28 18:50:11,625 WARN L193 SmtUtils]: Spent 412.00 ms on a formula simplification that was a NOOP. DAG size: 229 [2020-10-28 18:50:13,229 WARN L193 SmtUtils]: Spent 461.00 ms on a formula simplification that was a NOOP. DAG size: 227 [2020-10-28 18:50:15,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:50:15,923 INFO L93 Difference]: Finished difference Result 94285 states and 143946 transitions. [2020-10-28 18:50:15,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 18:50:15,924 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 114 [2020-10-28 18:50:15,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:50:16,011 INFO L225 Difference]: With dead ends: 94285 [2020-10-28 18:50:16,012 INFO L226 Difference]: Without dead ends: 62794 [2020-10-28 18:50:16,054 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-10-28 18:50:16,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62794 states. [2020-10-28 18:50:19,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62794 to 62791. [2020-10-28 18:50:19,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62791 states. [2020-10-28 18:50:19,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62791 states to 62791 states and 95558 transitions. [2020-10-28 18:50:19,807 INFO L78 Accepts]: Start accepts. Automaton has 62791 states and 95558 transitions. Word has length 114 [2020-10-28 18:50:19,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:50:19,807 INFO L481 AbstractCegarLoop]: Abstraction has 62791 states and 95558 transitions. [2020-10-28 18:50:19,807 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 18:50:19,807 INFO L276 IsEmpty]: Start isEmpty. Operand 62791 states and 95558 transitions. [2020-10-28 18:50:19,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-10-28 18:50:19,808 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:50:19,808 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:50:19,808 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-28 18:50:19,808 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:50:19,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:50:19,809 INFO L82 PathProgramCache]: Analyzing trace with hash 1023427909, now seen corresponding path program 1 times [2020-10-28 18:50:19,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:50:19,809 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1571835490] [2020-10-28 18:50:19,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:50:19,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:50:19,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:50:19,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:50:20,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:50:20,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:50:24,836 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:50:24,836 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 122 [2020-10-28 18:50:24,836 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 18:50:24,836 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-28 18:50:24,836 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:50:24,837 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:50:24,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 18:50:24,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 18:50:24,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-28 18:50:24,837 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:50:25,284 WARN L193 SmtUtils]: Spent 387.00 ms on a formula simplification that was a NOOP. DAG size: 220 [2020-10-28 18:50:25,285 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:50:25,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:50:25,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:50:25,322 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:50:25,323 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:50:25,323 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:50:25,323 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-10-28 18:50:25,323 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:50:25,323 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:50:25,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:50:25,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:50:25,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 18:50:25,324 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:50:25,349 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:50:25,350 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1571835490] [2020-10-28 18:50:25,350 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:50:25,350 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:50:25,350 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371931892] [2020-10-28 18:50:25,351 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 18:50:25,351 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:50:25,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 18:50:25,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 18:50:25,352 INFO L87 Difference]: Start difference. First operand 62791 states and 95558 transitions. Second operand 6 states. [2020-10-28 18:50:25,831 WARN L193 SmtUtils]: Spent 427.00 ms on a formula simplification that was a NOOP. DAG size: 226 [2020-10-28 18:50:29,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:50:29,414 INFO L93 Difference]: Finished difference Result 125514 states and 191048 transitions. [2020-10-28 18:50:29,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 18:50:29,417 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 114 [2020-10-28 18:50:29,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:50:29,508 INFO L225 Difference]: With dead ends: 125514 [2020-10-28 18:50:29,509 INFO L226 Difference]: Without dead ends: 62791 [2020-10-28 18:50:29,771 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-28 18:50:29,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62791 states. [2020-10-28 18:50:33,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62791 to 62791. [2020-10-28 18:50:33,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62791 states. [2020-10-28 18:50:33,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62791 states to 62791 states and 95046 transitions. [2020-10-28 18:50:33,580 INFO L78 Accepts]: Start accepts. Automaton has 62791 states and 95046 transitions. Word has length 114 [2020-10-28 18:50:33,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:50:33,580 INFO L481 AbstractCegarLoop]: Abstraction has 62791 states and 95046 transitions. [2020-10-28 18:50:33,580 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 18:50:33,580 INFO L276 IsEmpty]: Start isEmpty. Operand 62791 states and 95046 transitions. [2020-10-28 18:50:33,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-10-28 18:50:33,581 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:50:33,581 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:50:33,581 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-28 18:50:33,581 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:50:33,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:50:33,582 INFO L82 PathProgramCache]: Analyzing trace with hash -1449889814, now seen corresponding path program 1 times [2020-10-28 18:50:33,582 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:50:33,582 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1266171819] [2020-10-28 18:50:33,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:50:33,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:50:33,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:50:33,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:50:35,695 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:50:35,696 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 122 [2020-10-28 18:50:35,696 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 18:50:35,696 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2075 [2020-10-28 18:50:35,696 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:50:35,696 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:50:35,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 18:50:35,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 18:50:35,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-28 18:50:35,697 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:50:36,162 WARN L193 SmtUtils]: Spent 384.00 ms on a formula simplification that was a NOOP. DAG size: 220 [2020-10-28 18:50:36,163 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:50:36,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:50:36,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:50:36,190 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:50:36,190 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:50:36,190 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:50:36,191 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-28 18:50:36,191 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:50:36,191 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:50:36,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:50:36,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:50:36,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 18:50:36,191 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:50:36,221 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:50:36,222 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1266171819] [2020-10-28 18:50:36,222 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:50:36,222 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:50:36,222 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836439137] [2020-10-28 18:50:36,223 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 18:50:36,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:50:36,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 18:50:36,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-28 18:50:36,224 INFO L87 Difference]: Start difference. First operand 62791 states and 95046 transitions. Second operand 6 states. [2020-10-28 18:50:36,700 WARN L193 SmtUtils]: Spent 423.00 ms on a formula simplification that was a NOOP. DAG size: 229 [2020-10-28 18:50:37,717 WARN L193 SmtUtils]: Spent 410.00 ms on a formula simplification that was a NOOP. DAG size: 227 [2020-10-28 18:50:44,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:50:44,248 INFO L93 Difference]: Finished difference Result 187213 states and 282954 transitions. [2020-10-28 18:50:44,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 18:50:44,248 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 114 [2020-10-28 18:50:44,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:50:44,572 INFO L225 Difference]: With dead ends: 187213 [2020-10-28 18:50:44,572 INFO L226 Difference]: Without dead ends: 124490 [2020-10-28 18:50:44,636 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-10-28 18:50:44,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124490 states. [2020-10-28 18:50:52,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124490 to 124487. [2020-10-28 18:50:52,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124487 states. [2020-10-28 18:50:52,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124487 states to 124487 states and 186950 transitions. [2020-10-28 18:50:52,557 INFO L78 Accepts]: Start accepts. Automaton has 124487 states and 186950 transitions. Word has length 114 [2020-10-28 18:50:52,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:50:52,557 INFO L481 AbstractCegarLoop]: Abstraction has 124487 states and 186950 transitions. [2020-10-28 18:50:52,557 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 18:50:52,557 INFO L276 IsEmpty]: Start isEmpty. Operand 124487 states and 186950 transitions. [2020-10-28 18:50:52,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-10-28 18:50:52,558 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:50:52,558 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:50:52,559 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-28 18:50:52,559 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:50:52,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:50:52,559 INFO L82 PathProgramCache]: Analyzing trace with hash -370978737, now seen corresponding path program 1 times [2020-10-28 18:50:52,560 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:50:52,560 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1943950555] [2020-10-28 18:50:52,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:50:52,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:50:52,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:50:53,437 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:50:53,437 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 122 [2020-10-28 18:50:53,437 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:50:53,438 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 850 [2020-10-28 18:50:53,438 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:50:53,438 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:50:53,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 18:50:53,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-28 18:50:53,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 102 [2020-10-28 18:50:53,438 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:50:53,959 WARN L193 SmtUtils]: Spent 367.00 ms on a formula simplification that was a NOOP. DAG size: 220 [2020-10-28 18:50:53,962 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:50:53,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:50:53,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:50:53,974 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:50:53,974 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:50:53,974 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:50:53,975 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 18:50:53,975 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:50:53,975 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:50:53,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:50:53,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:50:53,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:50:53,975 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:50:54,007 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:50:54,008 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1943950555] [2020-10-28 18:50:54,008 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:50:54,008 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-10-28 18:50:54,009 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969273991] [2020-10-28 18:50:54,009 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 18:50:54,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:50:54,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 18:50:54,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-28 18:50:54,010 INFO L87 Difference]: Start difference. First operand 124487 states and 186950 transitions. Second operand 11 states. [2020-10-28 18:50:54,576 WARN L193 SmtUtils]: Spent 488.00 ms on a formula simplification that was a NOOP. DAG size: 236 [2020-10-28 18:50:55,821 WARN L193 SmtUtils]: Spent 418.00 ms on a formula simplification that was a NOOP. DAG size: 223 [2020-10-28 18:51:00,204 WARN L193 SmtUtils]: Spent 524.00 ms on a formula simplification that was a NOOP. DAG size: 222 [2020-10-28 18:51:00,771 WARN L193 SmtUtils]: Spent 487.00 ms on a formula simplification that was a NOOP. DAG size: 224 [2020-10-28 18:51:01,357 WARN L193 SmtUtils]: Spent 497.00 ms on a formula simplification that was a NOOP. DAG size: 226 [2020-10-28 18:51:01,983 WARN L193 SmtUtils]: Spent 546.00 ms on a formula simplification that was a NOOP. DAG size: 234 [2020-10-28 18:51:02,519 WARN L193 SmtUtils]: Spent 438.00 ms on a formula simplification that was a NOOP. DAG size: 232 [2020-10-28 18:51:02,995 WARN L193 SmtUtils]: Spent 425.00 ms on a formula simplification that was a NOOP. DAG size: 230 [2020-10-28 18:51:03,459 WARN L193 SmtUtils]: Spent 412.00 ms on a formula simplification that was a NOOP. DAG size: 228 [2020-10-28 18:51:05,821 WARN L193 SmtUtils]: Spent 393.00 ms on a formula simplification that was a NOOP. DAG size: 224 [2020-10-28 18:51:06,405 WARN L193 SmtUtils]: Spent 487.00 ms on a formula simplification that was a NOOP. DAG size: 226 [2020-10-28 18:51:06,895 WARN L193 SmtUtils]: Spent 414.00 ms on a formula simplification that was a NOOP. DAG size: 228 [2020-10-28 18:51:07,413 WARN L193 SmtUtils]: Spent 454.00 ms on a formula simplification that was a NOOP. DAG size: 234 [2020-10-28 18:51:07,914 WARN L193 SmtUtils]: Spent 446.00 ms on a formula simplification that was a NOOP. DAG size: 232 [2020-10-28 18:51:08,409 WARN L193 SmtUtils]: Spent 437.00 ms on a formula simplification that was a NOOP. DAG size: 230