/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.7.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 18:47:28,707 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 18:47:28,711 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 18:47:28,769 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 18:47:28,769 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 18:47:28,776 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 18:47:28,778 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 18:47:28,783 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 18:47:28,787 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 18:47:28,793 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 18:47:28,794 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 18:47:28,795 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 18:47:28,797 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 18:47:28,801 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 18:47:28,804 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 18:47:28,806 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 18:47:28,807 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 18:47:28,811 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 18:47:28,818 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 18:47:28,823 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 18:47:28,826 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 18:47:28,827 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 18:47:28,829 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 18:47:28,831 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 18:47:28,841 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 18:47:28,842 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 18:47:28,842 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 18:47:28,844 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 18:47:28,845 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 18:47:28,846 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 18:47:28,846 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 18:47:28,847 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 18:47:28,849 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 18:47:28,850 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 18:47:28,851 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 18:47:28,851 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 18:47:28,852 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 18:47:28,852 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 18:47:28,852 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 18:47:28,853 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 18:47:28,854 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 18:47:28,861 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 18:47:28,910 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 18:47:28,910 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 18:47:28,914 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 18:47:28,915 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 18:47:28,915 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 18:47:28,915 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 18:47:28,915 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 18:47:28,916 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 18:47:28,916 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 18:47:28,916 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 18:47:28,917 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 18:47:28,917 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 18:47:28,918 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 18:47:28,918 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 18:47:28,918 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 18:47:28,918 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 18:47:28,918 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 18:47:28,919 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 18:47:28,919 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 18:47:28,919 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 18:47:28,919 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 18:47:28,919 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 18:47:28,932 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 18:47:28,932 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 18:47:28,932 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 18:47:28,932 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 18:47:28,933 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 18:47:28,933 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 18:47:28,933 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 18:47:28,933 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 18:47:29,367 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 18:47:29,397 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 18:47:29,400 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 18:47:29,401 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 18:47:29,402 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 18:47:29,403 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.7.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-28 18:47:29,480 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5fe82da73/00d8e0405b5b43cda98eee4f0573ade1/FLAG39044e716 [2020-10-28 18:47:30,279 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 18:47:30,280 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.7.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-28 18:47:30,297 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5fe82da73/00d8e0405b5b43cda98eee4f0573ade1/FLAG39044e716 [2020-10-28 18:47:30,536 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5fe82da73/00d8e0405b5b43cda98eee4f0573ade1 [2020-10-28 18:47:30,539 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 18:47:30,550 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 18:47:30,555 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 18:47:30,555 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 18:47:30,559 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 18:47:30,560 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 06:47:30" (1/1) ... [2020-10-28 18:47:30,564 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7ab36c03 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:47:30, skipping insertion in model container [2020-10-28 18:47:30,564 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 06:47:30" (1/1) ... [2020-10-28 18:47:30,573 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 18:47:30,614 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 18:47:30,908 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 18:47:30,927 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 18:47:31,071 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 18:47:31,108 INFO L208 MainTranslator]: Completed translation [2020-10-28 18:47:31,109 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:47:31 WrapperNode [2020-10-28 18:47:31,109 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 18:47:31,110 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 18:47:31,111 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 18:47:31,111 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 18:47:31,124 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:47:31" (1/1) ... [2020-10-28 18:47:31,125 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:47:31" (1/1) ... [2020-10-28 18:47:31,139 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:47:31" (1/1) ... [2020-10-28 18:47:31,140 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:47:31" (1/1) ... [2020-10-28 18:47:31,159 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:47:31" (1/1) ... [2020-10-28 18:47:31,170 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:47:31" (1/1) ... [2020-10-28 18:47:31,175 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:47:31" (1/1) ... [2020-10-28 18:47:31,186 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 18:47:31,187 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 18:47:31,187 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 18:47:31,187 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 18:47:31,188 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:47:31" (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 18:47:31,272 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 18:47:31,272 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 18:47:31,272 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 18:47:31,272 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-28 18:47:31,273 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 18:47:31,273 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 18:47:31,273 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 18:47:31,273 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 18:47:31,273 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 18:47:31,273 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-28 18:47:31,274 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-28 18:47:31,274 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-10-28 18:47:31,274 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-28 18:47:31,274 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-28 18:47:31,274 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-28 18:47:31,274 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-28 18:47:31,275 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-28 18:47:31,275 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-28 18:47:31,275 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-28 18:47:31,275 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-28 18:47:31,275 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-10-28 18:47:31,275 INFO L130 BoogieDeclarations]: Found specification of procedure node6 [2020-10-28 18:47:31,275 INFO L130 BoogieDeclarations]: Found specification of procedure node7 [2020-10-28 18:47:31,276 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-28 18:47:31,276 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-28 18:47:31,276 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 18:47:31,276 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 18:47:31,276 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 18:47:31,276 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 18:47:31,276 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 18:47:31,277 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 18:47:31,277 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 18:47:32,301 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 18:47:32,301 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-28 18:47:32,303 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 06:47:32 BoogieIcfgContainer [2020-10-28 18:47:32,303 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 18:47:32,305 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 18:47:32,305 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 18:47:32,309 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 18:47:32,310 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 06:47:30" (1/3) ... [2020-10-28 18:47:32,310 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31f517b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 06:47:32, skipping insertion in model container [2020-10-28 18:47:32,311 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:47:31" (2/3) ... [2020-10-28 18:47:32,311 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31f517b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 06:47:32, skipping insertion in model container [2020-10-28 18:47:32,311 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 06:47:32" (3/3) ... [2020-10-28 18:47:32,312 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.7.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-28 18:47:32,324 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 18:47:32,330 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 18:47:32,344 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 18:47:32,374 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 18:47:32,375 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 18:47:32,375 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 18:47:32,375 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 18:47:32,375 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 18:47:32,375 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 18:47:32,375 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 18:47:32,376 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 18:47:32,398 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states. [2020-10-28 18:47:32,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-10-28 18:47:32,411 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:47:32,412 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:47:32,413 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:47:32,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:47:32,420 INFO L82 PathProgramCache]: Analyzing trace with hash 308652574, now seen corresponding path program 1 times [2020-10-28 18:47:32,431 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:47:32,431 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [503803915] [2020-10-28 18:47:32,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:47:32,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:47:32,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:47:33,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:47:33,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:47:33,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:47:34,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:47:35,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:47:35,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:47:37,830 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:47:37,831 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 100 [2020-10-28 18:47:37,831 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 18:47:37,831 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5031 [2020-10-28 18:47:37,837 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:47:37,838 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:47:37,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:47:37,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 32 [2020-10-28 18:47:37,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-28 18:47:37,839 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 7 [2020-10-28 18:47:38,417 WARN L193 SmtUtils]: Spent 371.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-10-28 18:47:38,428 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:47:38,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:47:38,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:47:38,473 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:47:38,473 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:47:38,474 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:47:38,474 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-10-28 18:47:38,474 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:47:38,474 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:47:38,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:47:38,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:47:38,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:47:38,475 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:47:38,533 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 18:47:38,534 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [503803915] [2020-10-28 18:47:38,537 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:47:38,538 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 18:47:38,539 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219392661] [2020-10-28 18:47:38,548 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 18:47:38,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:47:38,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 18:47:38,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 18:47:38,575 INFO L87 Difference]: Start difference. First operand 147 states. Second operand 4 states. [2020-10-28 18:47:39,066 WARN L193 SmtUtils]: Spent 357.00 ms on a formula simplification that was a NOOP. DAG size: 203 [2020-10-28 18:47:40,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:47:40,083 INFO L93 Difference]: Finished difference Result 313 states and 505 transitions. [2020-10-28 18:47:40,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 18:47:40,085 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 92 [2020-10-28 18:47:40,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:47:40,098 INFO L225 Difference]: With dead ends: 313 [2020-10-28 18:47:40,098 INFO L226 Difference]: Without dead ends: 215 [2020-10-28 18:47:40,102 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 18:47:40,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2020-10-28 18:47:40,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 212. [2020-10-28 18:47:40,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 212 states. [2020-10-28 18:47:40,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 303 transitions. [2020-10-28 18:47:40,171 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 303 transitions. Word has length 92 [2020-10-28 18:47:40,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:47:40,172 INFO L481 AbstractCegarLoop]: Abstraction has 212 states and 303 transitions. [2020-10-28 18:47:40,172 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 18:47:40,173 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 303 transitions. [2020-10-28 18:47:40,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-10-28 18:47:40,177 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:47:40,177 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:47:40,178 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 18:47:40,178 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:47:40,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:47:40,179 INFO L82 PathProgramCache]: Analyzing trace with hash 1307111254, now seen corresponding path program 1 times [2020-10-28 18:47:40,179 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:47:40,179 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2072938429] [2020-10-28 18:47:40,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:47:40,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:47:40,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:47:40,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:47:40,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:47:40,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:47:41,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:47:41,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:47:45,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:47:45,252 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:47:45,253 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-28 18:47:45,253 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 18:47:45,253 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5027 [2020-10-28 18:47:45,253 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:47:45,254 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:47:45,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:47:45,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 40 [2020-10-28 18:47:45,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-28 18:47:45,254 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:47:45,591 WARN L193 SmtUtils]: Spent 262.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-10-28 18:47:45,593 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:47:45,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:47:45,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:47:45,616 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:47:45,617 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:47:45,617 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:47:45,617 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-28 18:47:45,617 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:47:45,618 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:47:45,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:47:45,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:47:45,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:47:45,619 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:47:45,656 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 18:47:45,657 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2072938429] [2020-10-28 18:47:45,657 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:47:45,657 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 18:47:45,658 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577831550] [2020-10-28 18:47:45,659 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 18:47:45,659 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:47:45,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 18:47:45,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 18:47:45,661 INFO L87 Difference]: Start difference. First operand 212 states and 303 transitions. Second operand 4 states. [2020-10-28 18:47:45,953 WARN L193 SmtUtils]: Spent 247.00 ms on a formula simplification that was a NOOP. DAG size: 203 [2020-10-28 18:47:46,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:47:46,690 INFO L93 Difference]: Finished difference Result 506 states and 769 transitions. [2020-10-28 18:47:46,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 18:47:46,693 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 93 [2020-10-28 18:47:46,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:47:46,711 INFO L225 Difference]: With dead ends: 506 [2020-10-28 18:47:46,711 INFO L226 Difference]: Without dead ends: 351 [2020-10-28 18:47:46,713 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:47:46,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2020-10-28 18:47:46,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 348. [2020-10-28 18:47:46,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 348 states. [2020-10-28 18:47:46,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 519 transitions. [2020-10-28 18:47:46,779 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 519 transitions. Word has length 93 [2020-10-28 18:47:46,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:47:46,780 INFO L481 AbstractCegarLoop]: Abstraction has 348 states and 519 transitions. [2020-10-28 18:47:46,780 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 18:47:46,780 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 519 transitions. [2020-10-28 18:47:46,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-10-28 18:47:46,784 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:47:46,784 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:47:46,785 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 18:47:46,785 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:47:46,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:47:46,786 INFO L82 PathProgramCache]: Analyzing trace with hash -620815107, now seen corresponding path program 1 times [2020-10-28 18:47:46,786 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:47:46,786 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [282294888] [2020-10-28 18:47:46,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:47:46,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:47:46,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:47:46,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:47:46,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:47:46,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:47:47,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:47:47,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:47:47,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:47:51,848 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:47:51,848 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-10-28 18:47:51,848 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 18:47:51,848 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5018 [2020-10-28 18:47:51,849 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:47:51,849 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:47:51,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:47:51,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 36 [2020-10-28 18:47:51,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-28 18:47:51,850 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:47:52,179 WARN L193 SmtUtils]: Spent 254.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-10-28 18:47:52,180 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:47:52,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:47:52,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:47:52,202 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:47:52,202 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:47:52,203 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:47:52,203 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-28 18:47:52,203 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:47:52,203 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:47:52,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:47:52,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:47:52,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:47:52,204 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:47:52,235 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 18:47:52,235 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [282294888] [2020-10-28 18:47:52,236 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:47:52,236 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 18:47:52,236 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94166821] [2020-10-28 18:47:52,237 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 18:47:52,237 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:47:52,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 18:47:52,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 18:47:52,238 INFO L87 Difference]: Start difference. First operand 348 states and 519 transitions. Second operand 4 states. [2020-10-28 18:47:52,541 WARN L193 SmtUtils]: Spent 261.00 ms on a formula simplification that was a NOOP. DAG size: 203 [2020-10-28 18:47:53,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:47:53,221 INFO L93 Difference]: Finished difference Result 898 states and 1391 transitions. [2020-10-28 18:47:53,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 18:47:53,221 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 94 [2020-10-28 18:47:53,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:47:53,227 INFO L225 Difference]: With dead ends: 898 [2020-10-28 18:47:53,228 INFO L226 Difference]: Without dead ends: 607 [2020-10-28 18:47:53,231 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:47:53,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 607 states. [2020-10-28 18:47:53,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 607 to 604. [2020-10-28 18:47:53,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 604 states. [2020-10-28 18:47:53,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 604 states to 604 states and 923 transitions. [2020-10-28 18:47:53,296 INFO L78 Accepts]: Start accepts. Automaton has 604 states and 923 transitions. Word has length 94 [2020-10-28 18:47:53,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:47:53,297 INFO L481 AbstractCegarLoop]: Abstraction has 604 states and 923 transitions. [2020-10-28 18:47:53,297 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 18:47:53,297 INFO L276 IsEmpty]: Start isEmpty. Operand 604 states and 923 transitions. [2020-10-28 18:47:53,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-10-28 18:47:53,299 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:47:53,300 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:47:53,300 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 18:47:53,300 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:47:53,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:47:53,301 INFO L82 PathProgramCache]: Analyzing trace with hash -833526691, now seen corresponding path program 1 times [2020-10-28 18:47:53,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:47:53,301 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1544466274] [2020-10-28 18:47:53,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:47:53,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:47:53,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:47:53,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:47:53,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:47:53,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:47:54,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:47:54,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:47:54,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:47:54,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:47:54,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:47:58,342 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:47:58,342 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 103 [2020-10-28 18:47:58,342 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-28 18:47:58,343 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-28 18:47:58,343 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:47:58,343 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:47:58,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:47:58,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-28 18:47:58,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-28 18:47:58,344 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:47:58,621 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-10-28 18:47:58,622 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:47:58,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:47:58,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:47:58,647 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:47:58,648 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:47:58,648 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:47:58,648 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-28 18:47:58,648 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:47:58,648 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:47:58,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:47:58,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:47:58,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:47:58,649 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:47:58,678 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 18:47:58,679 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1544466274] [2020-10-28 18:47:58,679 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:47:58,679 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 18:47:58,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906057584] [2020-10-28 18:47:58,680 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 18:47:58,680 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:47:58,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 18:47:58,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 18:47:58,681 INFO L87 Difference]: Start difference. First operand 604 states and 923 transitions. Second operand 4 states. [2020-10-28 18:47:59,047 WARN L193 SmtUtils]: Spent 312.00 ms on a formula simplification that was a NOOP. DAG size: 203 [2020-10-28 18:47:59,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:47:59,807 INFO L93 Difference]: Finished difference Result 1634 states and 2551 transitions. [2020-10-28 18:47:59,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 18:47:59,808 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 95 [2020-10-28 18:47:59,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:47:59,817 INFO L225 Difference]: With dead ends: 1634 [2020-10-28 18:47:59,818 INFO L226 Difference]: Without dead ends: 1087 [2020-10-28 18:47:59,822 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:47:59,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1087 states. [2020-10-28 18:47:59,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1087 to 1084. [2020-10-28 18:47:59,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1084 states. [2020-10-28 18:47:59,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1084 states to 1084 states and 1675 transitions. [2020-10-28 18:47:59,899 INFO L78 Accepts]: Start accepts. Automaton has 1084 states and 1675 transitions. Word has length 95 [2020-10-28 18:47:59,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:47:59,903 INFO L481 AbstractCegarLoop]: Abstraction has 1084 states and 1675 transitions. [2020-10-28 18:47:59,903 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 18:47:59,903 INFO L276 IsEmpty]: Start isEmpty. Operand 1084 states and 1675 transitions. [2020-10-28 18:47:59,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-10-28 18:47:59,910 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:47:59,911 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:47:59,911 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 18:47:59,911 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:47:59,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:47:59,912 INFO L82 PathProgramCache]: Analyzing trace with hash 1835141951, now seen corresponding path program 1 times [2020-10-28 18:47:59,912 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:47:59,912 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [309887362] [2020-10-28 18:47:59,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:47:59,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:47:59,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:48:00,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:48:00,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:48:00,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:48:00,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:48:01,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:48:01,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:48:02,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:48:03,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:48:03,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:48:03,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:48:04,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:48:04,966 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:48:04,966 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 104 [2020-10-28 18:48:04,966 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-28 18:48:04,966 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-28 18:48:04,967 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:48:04,967 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:48:04,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:48:04,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-28 18:48:04,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-28 18:48:04,968 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:48:05,259 WARN L193 SmtUtils]: Spent 242.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-10-28 18:48:05,261 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:48:05,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:48:05,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:48:05,291 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:48:05,291 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:48:05,291 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:48:05,292 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-28 18:48:05,292 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:48:05,292 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:48:05,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:48:05,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:48:05,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:48:05,293 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:48:05,335 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 18:48:05,336 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [309887362] [2020-10-28 18:48:05,337 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:48:05,339 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 18:48:05,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906254003] [2020-10-28 18:48:05,340 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 18:48:05,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:48:05,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 18:48:05,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 18:48:05,357 INFO L87 Difference]: Start difference. First operand 1084 states and 1675 transitions. Second operand 4 states. [2020-10-28 18:48:05,697 WARN L193 SmtUtils]: Spent 282.00 ms on a formula simplification that was a NOOP. DAG size: 203 [2020-10-28 18:48:06,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:48:06,435 INFO L93 Difference]: Finished difference Result 3010 states and 4703 transitions. [2020-10-28 18:48:06,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 18:48:06,436 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 96 [2020-10-28 18:48:06,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:48:06,448 INFO L225 Difference]: With dead ends: 3010 [2020-10-28 18:48:06,448 INFO L226 Difference]: Without dead ends: 1983 [2020-10-28 18:48:06,451 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:48:06,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1983 states. [2020-10-28 18:48:06,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1983 to 1980. [2020-10-28 18:48:06,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1980 states. [2020-10-28 18:48:06,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1980 states to 1980 states and 3067 transitions. [2020-10-28 18:48:06,581 INFO L78 Accepts]: Start accepts. Automaton has 1980 states and 3067 transitions. Word has length 96 [2020-10-28 18:48:06,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:48:06,582 INFO L481 AbstractCegarLoop]: Abstraction has 1980 states and 3067 transitions. [2020-10-28 18:48:06,582 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 18:48:06,582 INFO L276 IsEmpty]: Start isEmpty. Operand 1980 states and 3067 transitions. [2020-10-28 18:48:06,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-10-28 18:48:06,583 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:48:06,583 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:48:06,584 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 18:48:06,584 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:48:06,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:48:06,584 INFO L82 PathProgramCache]: Analyzing trace with hash 1216540077, now seen corresponding path program 1 times [2020-10-28 18:48:06,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:48:06,585 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [154013685] [2020-10-28 18:48:06,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:48:06,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:48:06,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:48:06,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:48:06,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:48:06,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:48:06,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:48:07,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:48:07,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:48:08,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:48:08,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:48:08,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:48:09,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:48:11,617 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:48:11,617 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 105 [2020-10-28 18:48:11,617 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-28 18:48:11,617 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-28 18:48:11,618 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:48:11,618 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:48:11,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:48:11,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 18:48:11,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-28 18:48:11,619 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:48:11,920 WARN L193 SmtUtils]: Spent 247.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-10-28 18:48:11,921 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:48:11,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:48:11,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:48:11,939 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:48:11,939 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:48:11,939 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:48:11,939 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-28 18:48:11,939 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:48:11,940 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:48:11,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:48:11,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:48:11,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:48:11,940 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:48:11,973 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 18:48:11,973 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [154013685] [2020-10-28 18:48:11,975 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:48:11,975 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 18:48:11,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893717912] [2020-10-28 18:48:11,976 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 18:48:11,976 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:48:11,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 18:48:11,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 18:48:11,977 INFO L87 Difference]: Start difference. First operand 1980 states and 3067 transitions. Second operand 4 states. [2020-10-28 18:48:12,259 WARN L193 SmtUtils]: Spent 236.00 ms on a formula simplification that was a NOOP. DAG size: 203 [2020-10-28 18:48:13,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:48:13,139 INFO L93 Difference]: Finished difference Result 5570 states and 8671 transitions. [2020-10-28 18:48:13,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 18:48:13,139 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 97 [2020-10-28 18:48:13,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:48:13,161 INFO L225 Difference]: With dead ends: 5570 [2020-10-28 18:48:13,161 INFO L226 Difference]: Without dead ends: 3647 [2020-10-28 18:48:13,167 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:48:13,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3647 states. [2020-10-28 18:48:13,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3647 to 3644. [2020-10-28 18:48:13,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3644 states. [2020-10-28 18:48:13,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3644 states to 3644 states and 5627 transitions. [2020-10-28 18:48:13,431 INFO L78 Accepts]: Start accepts. Automaton has 3644 states and 5627 transitions. Word has length 97 [2020-10-28 18:48:13,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:48:13,432 INFO L481 AbstractCegarLoop]: Abstraction has 3644 states and 5627 transitions. [2020-10-28 18:48:13,432 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 18:48:13,432 INFO L276 IsEmpty]: Start isEmpty. Operand 3644 states and 5627 transitions. [2020-10-28 18:48:13,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-10-28 18:48:13,433 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:48:13,434 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:48:13,434 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 18:48:13,434 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:48:13,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:48:13,435 INFO L82 PathProgramCache]: Analyzing trace with hash 91190449, now seen corresponding path program 1 times [2020-10-28 18:48:13,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:48:13,437 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1442593281] [2020-10-28 18:48:13,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:48:13,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:48:13,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:48:13,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:48:13,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:48:13,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:48:13,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:48:13,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:48:14,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:48:16,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:48:16,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:48:16,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:48:16,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:48:16,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:48:17,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:48:18,473 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:48:18,473 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 106 [2020-10-28 18:48:18,474 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-28 18:48:18,474 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-28 18:48:18,474 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:48:18,474 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:48:18,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 18:48:18,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 18:48:18,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 91 [2020-10-28 18:48:18,475 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:48:18,862 WARN L193 SmtUtils]: Spent 278.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-10-28 18:48:18,863 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:48:18,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:48:18,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:48:18,911 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:48:18,912 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:48:18,912 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:48:18,912 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 36 [2020-10-28 18:48:18,912 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:48:18,913 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:48:18,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:48:18,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:48:18,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 18:48:18,913 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:48:18,964 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 18:48:18,964 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1442593281] [2020-10-28 18:48:18,965 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:48:18,965 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:48:18,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680321001] [2020-10-28 18:48:18,965 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 18:48:18,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:48:18,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 18:48:18,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-28 18:48:18,967 INFO L87 Difference]: Start difference. First operand 3644 states and 5627 transitions. Second operand 6 states. [2020-10-28 18:48:19,329 WARN L193 SmtUtils]: Spent 307.00 ms on a formula simplification that was a NOOP. DAG size: 208 [2020-10-28 18:48:20,202 WARN L193 SmtUtils]: Spent 242.00 ms on a formula simplification that was a NOOP. DAG size: 206 [2020-10-28 18:48:20,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:48:20,602 INFO L93 Difference]: Finished difference Result 10786 states and 16703 transitions. [2020-10-28 18:48:20,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 18:48:20,602 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 98 [2020-10-28 18:48:20,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:48:20,641 INFO L225 Difference]: With dead ends: 10786 [2020-10-28 18:48:20,642 INFO L226 Difference]: Without dead ends: 7199 [2020-10-28 18:48:20,653 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-10-28 18:48:20,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7199 states. [2020-10-28 18:48:21,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7199 to 7196. [2020-10-28 18:48:21,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7196 states. [2020-10-28 18:48:21,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7196 states to 7196 states and 11099 transitions. [2020-10-28 18:48:21,102 INFO L78 Accepts]: Start accepts. Automaton has 7196 states and 11099 transitions. Word has length 98 [2020-10-28 18:48:21,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:48:21,102 INFO L481 AbstractCegarLoop]: Abstraction has 7196 states and 11099 transitions. [2020-10-28 18:48:21,102 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 18:48:21,102 INFO L276 IsEmpty]: Start isEmpty. Operand 7196 states and 11099 transitions. [2020-10-28 18:48:21,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-10-28 18:48:21,103 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:48:21,104 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:48:21,104 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 18:48:21,104 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:48:21,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:48:21,104 INFO L82 PathProgramCache]: Analyzing trace with hash 926392940, now seen corresponding path program 1 times [2020-10-28 18:48:21,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:48:21,105 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [587236536] [2020-10-28 18:48:21,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:48:21,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:48:21,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:48:21,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:48:21,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:48:21,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:48:21,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:48:21,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:48:21,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:48:22,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:48:22,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:48:22,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:48:26,136 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:48:26,137 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 106 [2020-10-28 18:48:26,137 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-28 18:48:26,137 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-28 18:48:26,137 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:48:26,137 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:48:26,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 18:48:26,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 18:48:26,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 86 [2020-10-28 18:48:26,138 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:48:26,470 WARN L193 SmtUtils]: Spent 247.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-10-28 18:48:26,471 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:48:26,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:48:26,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:48:26,506 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:48:26,506 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:48:26,508 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:48:26,508 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-28 18:48:26,508 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:48:26,508 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:48:26,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:48:26,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:48:26,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 18:48:26,509 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:48:26,543 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 18:48:26,543 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [587236536] [2020-10-28 18:48:26,549 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:48:26,549 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:48:26,550 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522588919] [2020-10-28 18:48:26,550 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 18:48:26,550 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:48:26,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 18:48:26,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-28 18:48:26,552 INFO L87 Difference]: Start difference. First operand 7196 states and 11099 transitions. Second operand 6 states. [2020-10-28 18:48:26,847 WARN L193 SmtUtils]: Spent 249.00 ms on a formula simplification that was a NOOP. DAG size: 208 [2020-10-28 18:48:27,754 WARN L193 SmtUtils]: Spent 246.00 ms on a formula simplification that was a NOOP. DAG size: 206 [2020-10-28 18:48:28,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:48:28,434 INFO L93 Difference]: Finished difference Result 21410 states and 33055 transitions. [2020-10-28 18:48:28,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 18:48:28,435 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 98 [2020-10-28 18:48:28,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:48:28,507 INFO L225 Difference]: With dead ends: 21410 [2020-10-28 18:48:28,507 INFO L226 Difference]: Without dead ends: 14271 [2020-10-28 18:48:28,525 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-10-28 18:48:28,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14271 states. [2020-10-28 18:48:29,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14271 to 14268. [2020-10-28 18:48:29,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14268 states. [2020-10-28 18:48:29,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14268 states to 14268 states and 21947 transitions. [2020-10-28 18:48:29,491 INFO L78 Accepts]: Start accepts. Automaton has 14268 states and 21947 transitions. Word has length 98 [2020-10-28 18:48:29,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:48:29,492 INFO L481 AbstractCegarLoop]: Abstraction has 14268 states and 21947 transitions. [2020-10-28 18:48:29,492 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 18:48:29,492 INFO L276 IsEmpty]: Start isEmpty. Operand 14268 states and 21947 transitions. [2020-10-28 18:48:29,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-10-28 18:48:29,493 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:48:29,493 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:48:29,493 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 18:48:29,494 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:48:29,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:48:29,495 INFO L82 PathProgramCache]: Analyzing trace with hash -341978735, now seen corresponding path program 1 times [2020-10-28 18:48:29,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:48:29,496 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1532107655] [2020-10-28 18:48:29,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:48:29,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:48:29,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:48:29,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:48:29,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:48:29,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:48:30,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:48:30,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:48:32,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:48:34,537 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:48:34,538 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 106 [2020-10-28 18:48:34,538 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 18:48:34,538 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-28 18:48:34,538 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:48:34,538 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:48:34,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 18:48:34,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 18:48:34,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-28 18:48:34,539 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:48:34,862 WARN L193 SmtUtils]: Spent 239.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-10-28 18:48:34,862 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:48:34,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:48:34,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:48:34,899 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:48:34,900 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:48:34,900 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:48:34,900 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-10-28 18:48:34,900 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:48:34,900 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:48:34,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:48:34,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:48:34,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 18:48:34,901 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:48:34,935 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 18:48:34,935 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1532107655] [2020-10-28 18:48:34,935 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:48:34,935 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:48:34,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815354138] [2020-10-28 18:48:34,936 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 18:48:34,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:48:34,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 18:48:34,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 18:48:34,937 INFO L87 Difference]: Start difference. First operand 14268 states and 21947 transitions. Second operand 6 states. [2020-10-28 18:48:35,271 WARN L193 SmtUtils]: Spent 273.00 ms on a formula simplification that was a NOOP. DAG size: 207 [2020-10-28 18:48:36,308 WARN L193 SmtUtils]: Spent 260.00 ms on a formula simplification that was a NOOP. DAG size: 205 [2020-10-28 18:48:37,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:48:37,263 INFO L93 Difference]: Finished difference Result 42562 states and 65471 transitions. [2020-10-28 18:48:37,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 18:48:37,264 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 98 [2020-10-28 18:48:37,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:48:37,336 INFO L225 Difference]: With dead ends: 42562 [2020-10-28 18:48:37,336 INFO L226 Difference]: Without dead ends: 28351 [2020-10-28 18:48:37,376 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-10-28 18:48:37,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28351 states. [2020-10-28 18:48:38,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28351 to 28348. [2020-10-28 18:48:38,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28348 states. [2020-10-28 18:48:38,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28348 states to 28348 states and 43451 transitions. [2020-10-28 18:48:38,900 INFO L78 Accepts]: Start accepts. Automaton has 28348 states and 43451 transitions. Word has length 98 [2020-10-28 18:48:38,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:48:38,900 INFO L481 AbstractCegarLoop]: Abstraction has 28348 states and 43451 transitions. [2020-10-28 18:48:38,900 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 18:48:38,900 INFO L276 IsEmpty]: Start isEmpty. Operand 28348 states and 43451 transitions. [2020-10-28 18:48:38,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-10-28 18:48:38,901 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:48:38,901 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:48:38,902 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 18:48:38,902 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:48:38,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:48:38,903 INFO L82 PathProgramCache]: Analyzing trace with hash 1516443254, now seen corresponding path program 1 times [2020-10-28 18:48:38,903 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:48:38,903 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [401209916] [2020-10-28 18:48:38,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:48:38,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:48:38,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:48:39,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:48:39,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:48:39,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:48:42,282 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:48:42,282 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 106 [2020-10-28 18:48:42,282 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 18:48:42,282 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3350 [2020-10-28 18:48:42,282 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:48:42,282 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:48:42,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 18:48:42,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 18:48:42,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-28 18:48:42,283 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:48:42,572 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-10-28 18:48:42,573 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:48:42,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:48:42,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:48:42,612 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:48:42,612 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:48:42,613 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:48:42,613 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-10-28 18:48:42,613 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:48:42,613 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:48:42,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:48:42,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:48:42,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 18:48:42,614 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:48:42,647 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 18:48:42,648 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [401209916] [2020-10-28 18:48:42,648 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:48:42,648 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:48:42,648 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473806745] [2020-10-28 18:48:42,649 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 18:48:42,649 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:48:42,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 18:48:42,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 18:48:42,650 INFO L87 Difference]: Start difference. First operand 28348 states and 43451 transitions. Second operand 6 states. [2020-10-28 18:48:42,940 WARN L193 SmtUtils]: Spent 239.00 ms on a formula simplification that was a NOOP. DAG size: 205 [2020-10-28 18:48:44,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:48:44,613 INFO L93 Difference]: Finished difference Result 56639 states and 86845 transitions. [2020-10-28 18:48:44,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 18:48:44,613 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 98 [2020-10-28 18:48:44,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:48:44,686 INFO L225 Difference]: With dead ends: 56639 [2020-10-28 18:48:44,686 INFO L226 Difference]: Without dead ends: 28348 [2020-10-28 18:48:44,743 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-28 18:48:44,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28348 states. [2020-10-28 18:48:46,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28348 to 28348. [2020-10-28 18:48:46,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28348 states. [2020-10-28 18:48:46,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28348 states to 28348 states and 43195 transitions. [2020-10-28 18:48:46,465 INFO L78 Accepts]: Start accepts. Automaton has 28348 states and 43195 transitions. Word has length 98 [2020-10-28 18:48:46,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:48:46,465 INFO L481 AbstractCegarLoop]: Abstraction has 28348 states and 43195 transitions. [2020-10-28 18:48:46,465 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 18:48:46,465 INFO L276 IsEmpty]: Start isEmpty. Operand 28348 states and 43195 transitions. [2020-10-28 18:48:46,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-10-28 18:48:46,466 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:48:46,466 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:48:46,467 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 18:48:46,467 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:48:46,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:48:46,467 INFO L82 PathProgramCache]: Analyzing trace with hash -956874469, now seen corresponding path program 1 times [2020-10-28 18:48:46,467 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:48:46,468 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [860966147] [2020-10-28 18:48:46,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:48:46,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:48:46,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:48:46,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:48:47,284 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:48:47,284 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 106 [2020-10-28 18:48:47,284 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 18:48:47,284 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 790 [2020-10-28 18:48:47,284 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:48:47,285 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:48:47,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 18:48:47,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 18:48:47,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-28 18:48:47,285 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:48:47,742 WARN L193 SmtUtils]: Spent 386.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-10-28 18:48:47,743 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:48:47,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:48:47,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:48:47,767 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:48:47,767 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:48:47,767 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:48:47,767 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-28 18:48:47,767 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:48:47,767 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:48:47,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:48:47,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:48:47,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 18:48:47,768 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:48:47,798 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 18:48:47,798 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [860966147] [2020-10-28 18:48:47,799 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:48:47,799 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:48:47,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016110057] [2020-10-28 18:48:47,799 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 18:48:47,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:48:47,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 18:48:47,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-28 18:48:47,800 INFO L87 Difference]: Start difference. First operand 28348 states and 43195 transitions. Second operand 6 states. [2020-10-28 18:48:48,113 WARN L193 SmtUtils]: Spent 258.00 ms on a formula simplification that was a NOOP. DAG size: 208 [2020-10-28 18:48:48,824 WARN L193 SmtUtils]: Spent 263.00 ms on a formula simplification that was a NOOP. DAG size: 206 [2020-10-28 18:48:51,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:48:51,556 INFO L93 Difference]: Finished difference Result 84418 states and 128447 transitions. [2020-10-28 18:48:51,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 18:48:51,556 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 98 [2020-10-28 18:48:51,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:48:51,664 INFO L225 Difference]: With dead ends: 84418 [2020-10-28 18:48:51,665 INFO L226 Difference]: Without dead ends: 56127 [2020-10-28 18:48:51,702 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-10-28 18:48:51,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56127 states. [2020-10-28 18:48:55,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56127 to 56124. [2020-10-28 18:48:55,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56124 states. [2020-10-28 18:48:55,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56124 states to 56124 states and 84795 transitions. [2020-10-28 18:48:55,202 INFO L78 Accepts]: Start accepts. Automaton has 56124 states and 84795 transitions. Word has length 98 [2020-10-28 18:48:55,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:48:55,203 INFO L481 AbstractCegarLoop]: Abstraction has 56124 states and 84795 transitions. [2020-10-28 18:48:55,203 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 18:48:55,203 INFO L276 IsEmpty]: Start isEmpty. Operand 56124 states and 84795 transitions. [2020-10-28 18:48:55,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-10-28 18:48:55,204 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:48:55,204 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:48:55,204 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-28 18:48:55,204 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:48:55,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:48:55,205 INFO L82 PathProgramCache]: Analyzing trace with hash -604179050, now seen corresponding path program 1 times [2020-10-28 18:48:55,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:48:55,205 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1110936857] [2020-10-28 18:48:55,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:48:55,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:48:55,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:48:55,611 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:48:55,611 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 106 [2020-10-28 18:48:55,611 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:48:55,611 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 371 [2020-10-28 18:48:55,611 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:48:55,611 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:48:55,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 18:48:55,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-28 18:48:55,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 86 [2020-10-28 18:48:55,612 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:48:55,959 WARN L193 SmtUtils]: Spent 234.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-10-28 18:48:55,960 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:48:55,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:48:55,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:48:55,973 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:48:55,973 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:48:55,974 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:48:55,974 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 18:48:55,974 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:48:55,974 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:48:55,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:48:55,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:48:55,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:48:55,974 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:48:56,002 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 18:48:56,003 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1110936857] [2020-10-28 18:48:56,003 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:48:56,003 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-28 18:48:56,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549299056] [2020-10-28 18:48:56,003 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 18:48:56,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:48:56,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 18:48:56,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-28 18:48:56,004 INFO L87 Difference]: Start difference. First operand 56124 states and 84795 transitions. Second operand 10 states. [2020-10-28 18:48:56,362 WARN L193 SmtUtils]: Spent 285.00 ms on a formula simplification that was a NOOP. DAG size: 213 [2020-10-28 18:48:57,335 WARN L193 SmtUtils]: Spent 394.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-10-28 18:48:58,598 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-10-28 18:48:59,136 WARN L193 SmtUtils]: Spent 237.00 ms on a formula simplification that was a NOOP. DAG size: 201 [2020-10-28 18:48:59,430 WARN L193 SmtUtils]: Spent 248.00 ms on a formula simplification that was a NOOP. DAG size: 203 [2020-10-28 18:48:59,744 WARN L193 SmtUtils]: Spent 263.00 ms on a formula simplification that was a NOOP. DAG size: 205 [2020-10-28 18:49:00,071 WARN L193 SmtUtils]: Spent 288.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2020-10-28 18:49:00,408 WARN L193 SmtUtils]: Spent 288.00 ms on a formula simplification that was a NOOP. DAG size: 209 [2020-10-28 18:49:00,719 WARN L193 SmtUtils]: Spent 272.00 ms on a formula simplification that was a NOOP. DAG size: 207 [2020-10-28 18:49:02,061 WARN L193 SmtUtils]: Spent 274.00 ms on a formula simplification that was a NOOP. DAG size: 203 [2020-10-28 18:49:02,388 WARN L193 SmtUtils]: Spent 279.00 ms on a formula simplification that was a NOOP. DAG size: 205 [2020-10-28 18:49:02,725 WARN L193 SmtUtils]: Spent 288.00 ms on a formula simplification that was a NOOP. DAG size: 207 [2020-10-28 18:49:03,141 WARN L193 SmtUtils]: Spent 367.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2020-10-28 18:49:03,495 WARN L193 SmtUtils]: Spent 298.00 ms on a formula simplification that was a NOOP. DAG size: 209 [2020-10-28 18:49:45,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:49:45,474 INFO L93 Difference]: Finished difference Result 841062 states and 1271127 transitions. [2020-10-28 18:49:45,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-28 18:49:45,474 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 98 [2020-10-28 18:49:45,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:49:47,407 INFO L225 Difference]: With dead ends: 841062 [2020-10-28 18:49:47,407 INFO L226 Difference]: Without dead ends: 784995 [2020-10-28 18:49:47,583 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=322, Invalid=800, Unknown=0, NotChecked=0, Total=1122 [2020-10-28 18:49:48,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 784995 states. [2020-10-28 18:50:03,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 784995 to 112188. [2020-10-28 18:50:03,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112188 states. [2020-10-28 18:50:04,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112188 states to 112188 states and 167483 transitions. [2020-10-28 18:50:04,213 INFO L78 Accepts]: Start accepts. Automaton has 112188 states and 167483 transitions. Word has length 98 [2020-10-28 18:50:04,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:50:04,214 INFO L481 AbstractCegarLoop]: Abstraction has 112188 states and 167483 transitions. [2020-10-28 18:50:04,214 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 18:50:04,214 INFO L276 IsEmpty]: Start isEmpty. Operand 112188 states and 167483 transitions. [2020-10-28 18:50:04,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-10-28 18:50:04,215 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:50:04,215 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:50:04,215 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-28 18:50:04,216 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:50:04,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:50:04,216 INFO L82 PathProgramCache]: Analyzing trace with hash 1572632955, now seen corresponding path program 1 times [2020-10-28 18:50:04,216 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:50:04,216 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [866135941] [2020-10-28 18:50:04,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:50:04,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:50:04,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:50:04,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:50:04,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:50:04,921 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:50:04,921 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 108 [2020-10-28 18:50:04,921 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 18:50:04,921 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 674 [2020-10-28 18:50:04,922 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:50:04,922 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:50:04,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:50:04,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 18:50:04,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 89 [2020-10-28 18:50:04,922 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:50:05,212 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-10-28 18:50:05,213 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:50:05,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:50:05,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:50:05,231 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:50:05,231 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:50:05,231 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:50:05,231 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-28 18:50:05,231 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:50:05,232 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:50:05,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:50:05,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:50:05,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:50:05,232 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:50:05,265 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 18:50:05,265 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [866135941] [2020-10-28 18:50:05,266 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:50:05,266 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 18:50:05,266 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339605893] [2020-10-28 18:50:05,266 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 18:50:05,266 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:50:05,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 18:50:05,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 18:50:05,267 INFO L87 Difference]: Start difference. First operand 112188 states and 167483 transitions. Second operand 4 states. [2020-10-28 18:50:05,569 WARN L193 SmtUtils]: Spent 250.00 ms on a formula simplification that was a NOOP. DAG size: 203 [2020-10-28 18:50:21,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:50:21,294 INFO L93 Difference]: Finished difference Result 275266 states and 409407 transitions. [2020-10-28 18:50:21,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 18:50:21,295 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 100 [2020-10-28 18:50:21,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:50:21,814 INFO L225 Difference]: With dead ends: 275266 [2020-10-28 18:50:21,815 INFO L226 Difference]: Without dead ends: 163135 [2020-10-28 18:50:21,886 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:50:21,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163135 states. [2020-10-28 18:50:37,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163135 to 162108. [2020-10-28 18:50:37,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162108 states. [2020-10-28 18:50:38,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162108 states to 162108 states and 238395 transitions. [2020-10-28 18:50:38,069 INFO L78 Accepts]: Start accepts. Automaton has 162108 states and 238395 transitions. Word has length 100 [2020-10-28 18:50:38,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:50:38,074 INFO L481 AbstractCegarLoop]: Abstraction has 162108 states and 238395 transitions. [2020-10-28 18:50:38,074 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 18:50:38,074 INFO L276 IsEmpty]: Start isEmpty. Operand 162108 states and 238395 transitions. [2020-10-28 18:50:38,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-10-28 18:50:38,075 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:50:38,076 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:50:38,076 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-28 18:50:38,076 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:50:38,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:50:38,077 INFO L82 PathProgramCache]: Analyzing trace with hash -2100804708, now seen corresponding path program 1 times [2020-10-28 18:50:38,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:50:38,079 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1989450573] [2020-10-28 18:50:38,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:50:38,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:50:38,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:50:38,738 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:50:38,738 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 108 [2020-10-28 18:50:38,738 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:50:38,738 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 621 [2020-10-28 18:50:38,738 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:50:38,738 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:50:38,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 18:50:38,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-28 18:50:38,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 88 [2020-10-28 18:50:38,739 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:50:39,564 WARN L193 SmtUtils]: Spent 250.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-10-28 18:50:39,566 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:50:39,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:50:39,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:50:39,580 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:50:39,580 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:50:39,580 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:50:39,581 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 18:50:39,581 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:50:39,581 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:50:39,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:50:39,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:50:39,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:50:39,582 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:50:39,632 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 18:50:39,632 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1989450573] [2020-10-28 18:50:39,632 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:50:39,632 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-28 18:50:39,633 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068372005] [2020-10-28 18:50:39,633 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 18:50:39,633 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:50:39,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 18:50:39,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-28 18:50:39,634 INFO L87 Difference]: Start difference. First operand 162108 states and 238395 transitions. Second operand 10 states. [2020-10-28 18:50:40,111 WARN L193 SmtUtils]: Spent 375.00 ms on a formula simplification that was a NOOP. DAG size: 220