/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/loop-acceleration/array_4.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 14:53:58,759 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 14:53:58,765 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 14:53:58,822 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 14:53:58,822 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 14:53:58,828 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 14:53:58,831 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 14:53:58,835 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 14:53:58,838 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 14:53:58,843 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 14:53:58,845 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 14:53:58,846 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 14:53:58,847 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 14:53:58,849 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 14:53:58,852 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 14:53:58,854 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 14:53:58,855 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 14:53:58,858 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 14:53:58,865 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 14:53:58,873 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 14:53:58,874 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 14:53:58,876 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 14:53:58,877 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 14:53:58,878 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 14:53:58,880 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 14:53:58,881 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 14:53:58,881 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 14:53:58,882 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 14:53:58,882 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 14:53:58,883 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 14:53:58,884 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 14:53:58,884 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 14:53:58,885 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 14:53:58,886 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 14:53:58,887 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 14:53:58,887 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 14:53:58,888 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 14:53:58,888 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 14:53:58,888 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 14:53:58,889 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 14:53:58,890 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 14:53:58,891 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 14:53:58,917 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 14:53:58,917 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 14:53:58,919 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 14:53:58,919 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 14:53:58,919 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 14:53:58,919 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 14:53:58,920 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 14:53:58,920 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 14:53:58,920 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 14:53:58,920 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 14:53:58,920 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 14:53:58,921 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 14:53:58,921 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 14:53:58,921 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 14:53:58,921 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 14:53:58,921 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 14:53:58,922 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 14:53:58,922 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 14:53:58,922 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 14:53:58,922 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 14:53:58,922 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 14:53:58,923 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 14:53:58,923 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 14:53:58,923 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 14:53:58,923 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 14:53:58,924 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 14:53:58,924 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 14:53:58,924 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 14:53:58,924 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 14:53:58,924 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 14:53:59,295 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 14:53:59,339 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 14:53:59,342 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 14:53:59,343 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 14:53:59,344 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 14:53:59,345 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/array_4.i [2020-10-28 14:53:59,424 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/cec4a1b05/a77fc7c13794413cb97d861c8fb5421b/FLAGae6bd8b7a [2020-10-28 14:54:00,119 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 14:54:00,120 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-acceleration/array_4.i [2020-10-28 14:54:00,127 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/cec4a1b05/a77fc7c13794413cb97d861c8fb5421b/FLAGae6bd8b7a [2020-10-28 14:54:00,506 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/cec4a1b05/a77fc7c13794413cb97d861c8fb5421b [2020-10-28 14:54:00,511 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 14:54:00,519 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 14:54:00,523 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 14:54:00,523 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 14:54:00,527 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 14:54:00,528 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 02:54:00" (1/1) ... [2020-10-28 14:54:00,534 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@376c3dbb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:54:00, skipping insertion in model container [2020-10-28 14:54:00,534 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 02:54:00" (1/1) ... [2020-10-28 14:54:00,543 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 14:54:00,563 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 14:54:00,804 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 14:54:00,812 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 14:54:00,832 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 14:54:00,849 INFO L208 MainTranslator]: Completed translation [2020-10-28 14:54:00,849 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:54:00 WrapperNode [2020-10-28 14:54:00,850 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 14:54:00,851 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 14:54:00,851 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 14:54:00,851 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 14:54:00,863 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:54:00" (1/1) ... [2020-10-28 14:54:00,864 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:54:00" (1/1) ... [2020-10-28 14:54:00,871 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:54:00" (1/1) ... [2020-10-28 14:54:00,872 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:54:00" (1/1) ... [2020-10-28 14:54:00,879 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:54:00" (1/1) ... [2020-10-28 14:54:00,883 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:54:00" (1/1) ... [2020-10-28 14:54:00,885 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:54:00" (1/1) ... [2020-10-28 14:54:00,887 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 14:54:00,888 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 14:54:00,888 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 14:54:00,888 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 14:54:00,889 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:54:00" (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 14:54:00,964 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 14:54:00,965 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 14:54:00,965 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 14:54:00,965 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-28 14:54:00,965 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 14:54:00,966 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 14:54:00,966 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 14:54:00,966 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-28 14:54:00,966 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-28 14:54:00,966 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 14:54:00,967 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 14:54:00,967 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-28 14:54:00,967 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-28 14:54:00,967 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 14:54:00,967 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 14:54:00,967 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 14:54:00,968 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 14:54:00,968 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 14:54:00,968 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 14:54:00,968 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 14:54:01,207 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 14:54:01,207 INFO L298 CfgBuilder]: Removed 2 assume(true) statements. [2020-10-28 14:54:01,209 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 02:54:01 BoogieIcfgContainer [2020-10-28 14:54:01,209 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 14:54:01,212 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 14:54:01,212 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 14:54:01,215 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 14:54:01,216 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 02:54:00" (1/3) ... [2020-10-28 14:54:01,217 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52741e93 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 02:54:01, skipping insertion in model container [2020-10-28 14:54:01,217 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:54:00" (2/3) ... [2020-10-28 14:54:01,218 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52741e93 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 02:54:01, skipping insertion in model container [2020-10-28 14:54:01,218 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 02:54:01" (3/3) ... [2020-10-28 14:54:01,219 INFO L111 eAbstractionObserver]: Analyzing ICFG array_4.i [2020-10-28 14:54:01,232 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 14:54:01,237 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 14:54:01,255 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 14:54:01,323 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 14:54:01,323 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 14:54:01,323 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 14:54:01,324 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 14:54:01,324 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 14:54:01,324 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 14:54:01,324 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 14:54:01,324 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 14:54:01,342 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2020-10-28 14:54:01,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-28 14:54:01,349 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:54:01,349 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:54:01,350 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:54:01,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:54:01,356 INFO L82 PathProgramCache]: Analyzing trace with hash 385493721, now seen corresponding path program 1 times [2020-10-28 14:54:01,366 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:54:01,366 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [144274666] [2020-10-28 14:54:01,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:54:01,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:54:01,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:54:01,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:54:01,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:54:02,093 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:54:02,094 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-28 14:54:02,094 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 14:54:02,095 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 544 [2020-10-28 14:54:02,097 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:54:02,097 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:54:02,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:54:02,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 14:54:02,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:54:02,098 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 14:54:02,206 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:54:02,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:54:02,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:54:02,221 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:54:02,221 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:54:02,222 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:54:02,222 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 14:54:02,222 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:54:02,222 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:54:02,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:54:02,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:54:02,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:54:02,223 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:54:02,233 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 14:54:02,234 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [144274666] [2020-10-28 14:54:02,236 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:54:02,236 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-28 14:54:02,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028276528] [2020-10-28 14:54:02,242 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-28 14:54:02,243 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:54:02,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-28 14:54:02,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-28 14:54:02,261 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 3 states. [2020-10-28 14:54:02,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:54:02,339 INFO L93 Difference]: Finished difference Result 47 states and 57 transitions. [2020-10-28 14:54:02,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-28 14:54:02,341 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2020-10-28 14:54:02,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:54:02,349 INFO L225 Difference]: With dead ends: 47 [2020-10-28 14:54:02,349 INFO L226 Difference]: Without dead ends: 19 [2020-10-28 14:54:02,352 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-28 14:54:02,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-10-28 14:54:02,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-10-28 14:54:02,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-10-28 14:54:02,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2020-10-28 14:54:02,394 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 15 [2020-10-28 14:54:02,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:54:02,394 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2020-10-28 14:54:02,394 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-28 14:54:02,394 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2020-10-28 14:54:02,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-28 14:54:02,395 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:54:02,395 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:54:02,396 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 14:54:02,396 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:54:02,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:54:02,397 INFO L82 PathProgramCache]: Analyzing trace with hash -436912548, now seen corresponding path program 1 times [2020-10-28 14:54:02,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:54:02,398 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [284997766] [2020-10-28 14:54:02,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:54:02,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:54:02,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:54:02,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:54:02,658 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:54:02,658 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-28 14:54:02,659 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:54:02,659 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 244 [2020-10-28 14:54:02,659 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:54:02,659 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:54:02,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:54:02,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:54:02,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 14:54:02,660 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:54:02,703 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:54:02,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:54:02,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:54:02,714 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:54:02,714 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:54:02,715 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:54:02,715 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 14:54:02,715 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:54:02,715 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:54:02,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:54:02,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:54:02,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:54:02,716 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:54:02,722 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 14:54:02,723 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [284997766] [2020-10-28 14:54:02,723 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:54:02,723 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 14:54:02,723 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703019695] [2020-10-28 14:54:02,725 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 14:54:02,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:54:02,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 14:54:02,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:54:02,727 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand 4 states. [2020-10-28 14:54:02,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:54:02,819 INFO L93 Difference]: Finished difference Result 36 states and 39 transitions. [2020-10-28 14:54:02,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 14:54:02,820 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2020-10-28 14:54:02,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:54:02,823 INFO L225 Difference]: With dead ends: 36 [2020-10-28 14:54:02,823 INFO L226 Difference]: Without dead ends: 25 [2020-10-28 14:54:02,824 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:54:02,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-10-28 14:54:02,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 20. [2020-10-28 14:54:02,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-10-28 14:54:02,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2020-10-28 14:54:02,840 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 16 [2020-10-28 14:54:02,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:54:02,840 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2020-10-28 14:54:02,840 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 14:54:02,840 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2020-10-28 14:54:02,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-28 14:54:02,841 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:54:02,841 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:54:02,842 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 14:54:02,842 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:54:02,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:54:02,847 INFO L82 PathProgramCache]: Analyzing trace with hash 170184382, now seen corresponding path program 1 times [2020-10-28 14:54:02,848 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:54:02,848 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [752788537] [2020-10-28 14:54:02,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:54:02,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:54:02,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:54:02,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:54:03,149 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:54:03,152 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-28 14:54:03,152 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:54:03,152 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 279 [2020-10-28 14:54:03,153 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:54:03,153 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:54:03,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 14:54:03,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-28 14:54:03,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-28 14:54:03,154 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:54:03,256 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:54:03,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:54:03,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:54:03,269 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:54:03,270 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:54:03,270 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:54:03,270 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 14:54:03,270 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:54:03,270 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:54:03,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:54:03,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:54:03,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:54:03,271 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:54:03,276 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 14:54:03,276 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [752788537] [2020-10-28 14:54:03,276 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:54:03,276 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 14:54:03,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240597472] [2020-10-28 14:54:03,277 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 14:54:03,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:54:03,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 14:54:03,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 14:54:03,280 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 6 states. [2020-10-28 14:54:03,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:54:03,462 INFO L93 Difference]: Finished difference Result 30 states and 31 transitions. [2020-10-28 14:54:03,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 14:54:03,463 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2020-10-28 14:54:03,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:54:03,464 INFO L225 Difference]: With dead ends: 30 [2020-10-28 14:54:03,464 INFO L226 Difference]: Without dead ends: 23 [2020-10-28 14:54:03,465 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-28 14:54:03,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-10-28 14:54:03,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2020-10-28 14:54:03,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-10-28 14:54:03,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2020-10-28 14:54:03,475 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 18 [2020-10-28 14:54:03,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:54:03,475 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2020-10-28 14:54:03,475 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 14:54:03,475 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2020-10-28 14:54:03,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-28 14:54:03,476 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:54:03,476 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:54:03,477 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 14:54:03,477 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:54:03,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:54:03,477 INFO L82 PathProgramCache]: Analyzing trace with hash 1562293261, now seen corresponding path program 1 times [2020-10-28 14:54:03,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:54:03,478 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [896003096] [2020-10-28 14:54:03,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:54:03,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:54:03,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:54:03,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:54:03,698 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:54:03,698 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-28 14:54:03,699 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:54:03,699 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 210 [2020-10-28 14:54:03,699 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:54:03,699 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:54:03,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 14:54:03,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:54:03,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-28 14:54:03,704 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-28 14:54:03,749 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:54:03,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:54:03,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:54:03,756 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:54:03,757 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:54:03,757 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:54:03,757 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:54:03,757 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:54:03,757 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:54:03,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:54:03,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:54:03,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:54:03,758 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:54:03,763 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-28 14:54:03,764 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [896003096] [2020-10-28 14:54:03,764 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:54:03,764 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 14:54:03,764 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008176674] [2020-10-28 14:54:03,765 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 14:54:03,765 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:54:03,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 14:54:03,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 14:54:03,766 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand 5 states. [2020-10-28 14:54:03,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:54:03,860 INFO L93 Difference]: Finished difference Result 43 states and 46 transitions. [2020-10-28 14:54:03,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 14:54:03,860 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 21 [2020-10-28 14:54:03,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:54:03,861 INFO L225 Difference]: With dead ends: 43 [2020-10-28 14:54:03,861 INFO L226 Difference]: Without dead ends: 30 [2020-10-28 14:54:03,862 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 14:54:03,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-10-28 14:54:03,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 24. [2020-10-28 14:54:03,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-28 14:54:03,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-10-28 14:54:03,868 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 21 [2020-10-28 14:54:03,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:54:03,868 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-10-28 14:54:03,869 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 14:54:03,869 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-10-28 14:54:03,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-28 14:54:03,869 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:54:03,870 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:54:03,870 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 14:54:03,870 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:54:03,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:54:03,871 INFO L82 PathProgramCache]: Analyzing trace with hash -547090197, now seen corresponding path program 2 times [2020-10-28 14:54:03,871 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:54:03,871 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [537287627] [2020-10-28 14:54:03,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:54:03,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:54:03,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:54:03,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:54:04,150 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:54:04,151 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-28 14:54:04,151 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:54:04,151 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 269 [2020-10-28 14:54:04,151 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:54:04,152 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:54:04,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 14:54:04,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-28 14:54:04,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-28 14:54:04,152 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:54:04,232 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:54:04,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:54:04,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:54:04,239 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:54:04,239 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:54:04,240 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:54:04,240 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:54:04,240 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:54:04,240 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:54:04,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:54:04,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:54:04,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:54:04,241 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:54:04,244 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-28 14:54:04,244 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [537287627] [2020-10-28 14:54:04,244 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:54:04,245 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 14:54:04,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134177224] [2020-10-28 14:54:04,245 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 14:54:04,245 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:54:04,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 14:54:04,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-28 14:54:04,247 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 7 states. [2020-10-28 14:54:04,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:54:04,369 INFO L93 Difference]: Finished difference Result 35 states and 36 transitions. [2020-10-28 14:54:04,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 14:54:04,370 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 23 [2020-10-28 14:54:04,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:54:04,371 INFO L225 Difference]: With dead ends: 35 [2020-10-28 14:54:04,371 INFO L226 Difference]: Without dead ends: 28 [2020-10-28 14:54:04,372 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-10-28 14:54:04,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-28 14:54:04,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2020-10-28 14:54:04,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-28 14:54:04,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2020-10-28 14:54:04,378 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 23 [2020-10-28 14:54:04,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:54:04,378 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2020-10-28 14:54:04,378 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 14:54:04,379 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2020-10-28 14:54:04,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-28 14:54:04,380 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:54:04,380 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:54:04,380 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 14:54:04,380 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:54:04,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:54:04,381 INFO L82 PathProgramCache]: Analyzing trace with hash 697607872, now seen corresponding path program 3 times [2020-10-28 14:54:04,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:54:04,381 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [533674820] [2020-10-28 14:54:04,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:54:04,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:54:04,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:54:04,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:54:04,715 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:54:04,715 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-28 14:54:04,716 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:54:04,716 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 319 [2020-10-28 14:54:04,716 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:54:04,716 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:54:04,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 14:54:04,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-28 14:54:04,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-28 14:54:04,717 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:54:04,785 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:54:04,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:54:04,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:54:04,792 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:54:04,792 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:54:04,792 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:54:04,792 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:54:04,792 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:54:04,793 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:54:04,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:54:04,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:54:04,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:54:04,793 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:54:04,797 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-28 14:54:04,797 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [533674820] [2020-10-28 14:54:04,798 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:54:04,798 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 14:54:04,798 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210315087] [2020-10-28 14:54:04,799 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 14:54:04,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:54:04,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 14:54:04,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-10-28 14:54:04,800 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 8 states. [2020-10-28 14:54:04,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:54:04,935 INFO L93 Difference]: Finished difference Result 41 states and 43 transitions. [2020-10-28 14:54:04,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 14:54:04,936 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 26 [2020-10-28 14:54:04,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:54:04,937 INFO L225 Difference]: With dead ends: 41 [2020-10-28 14:54:04,937 INFO L226 Difference]: Without dead ends: 34 [2020-10-28 14:54:04,938 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-10-28 14:54:04,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-28 14:54:04,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 30. [2020-10-28 14:54:04,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-28 14:54:04,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2020-10-28 14:54:04,944 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 26 [2020-10-28 14:54:04,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:54:04,944 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2020-10-28 14:54:04,944 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 14:54:04,944 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2020-10-28 14:54:04,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-28 14:54:04,945 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:54:04,945 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:54:04,945 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 14:54:04,946 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:54:04,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:54:04,946 INFO L82 PathProgramCache]: Analyzing trace with hash -1249852213, now seen corresponding path program 4 times [2020-10-28 14:54:04,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:54:04,947 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1258172873] [2020-10-28 14:54:04,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:54:04,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:54:04,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:54:04,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:54:05,307 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:54:05,307 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-28 14:54:05,307 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:54:05,307 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 348 [2020-10-28 14:54:05,308 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:54:05,308 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:54:05,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 14:54:05,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:54:05,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 14:54:05,309 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:54:05,350 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:54:05,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:54:05,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:54:05,357 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:54:05,357 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:54:05,357 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:54:05,357 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:54:05,357 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:54:05,358 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:54:05,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:54:05,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:54:05,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:54:05,358 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:54:05,362 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-28 14:54:05,362 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1258172873] [2020-10-28 14:54:05,362 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:54:05,362 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 14:54:05,363 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807959700] [2020-10-28 14:54:05,363 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 14:54:05,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:54:05,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 14:54:05,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-28 14:54:05,364 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 6 states. [2020-10-28 14:54:05,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:54:05,426 INFO L93 Difference]: Finished difference Result 53 states and 55 transitions. [2020-10-28 14:54:05,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 14:54:05,426 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 29 [2020-10-28 14:54:05,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:54:05,427 INFO L225 Difference]: With dead ends: 53 [2020-10-28 14:54:05,427 INFO L226 Difference]: Without dead ends: 34 [2020-10-28 14:54:05,428 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-28 14:54:05,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-28 14:54:05,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2020-10-28 14:54:05,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-28 14:54:05,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2020-10-28 14:54:05,433 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 29 [2020-10-28 14:54:05,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:54:05,434 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2020-10-28 14:54:05,434 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 14:54:05,434 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2020-10-28 14:54:05,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-28 14:54:05,435 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:54:05,435 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:54:05,435 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 14:54:05,435 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:54:05,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:54:05,436 INFO L82 PathProgramCache]: Analyzing trace with hash 1308779433, now seen corresponding path program 5 times [2020-10-28 14:54:05,436 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:54:05,436 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [761398869] [2020-10-28 14:54:05,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:54:05,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:54:05,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:54:05,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:54:05,959 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:54:05,960 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-28 14:54:05,960 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:54:05,960 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 512 [2020-10-28 14:54:05,960 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:54:05,960 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:54:05,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 14:54:05,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-28 14:54:05,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-28 14:54:05,961 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:54:06,025 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:54:06,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:54:06,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:54:06,031 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:54:06,032 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:54:06,032 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:54:06,032 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:54:06,032 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:54:06,032 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:54:06,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:54:06,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:54:06,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:54:06,033 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:54:06,037 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-28 14:54:06,038 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [761398869] [2020-10-28 14:54:06,038 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:54:06,038 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-28 14:54:06,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429082708] [2020-10-28 14:54:06,039 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 14:54:06,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:54:06,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 14:54:06,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-28 14:54:06,040 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand 9 states. [2020-10-28 14:54:06,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:54:06,190 INFO L93 Difference]: Finished difference Result 61 states and 64 transitions. [2020-10-28 14:54:06,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 14:54:06,191 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 31 [2020-10-28 14:54:06,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:54:06,191 INFO L225 Difference]: With dead ends: 61 [2020-10-28 14:54:06,192 INFO L226 Difference]: Without dead ends: 39 [2020-10-28 14:54:06,192 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2020-10-28 14:54:06,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-28 14:54:06,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 37. [2020-10-28 14:54:06,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-28 14:54:06,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2020-10-28 14:54:06,198 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 31 [2020-10-28 14:54:06,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:54:06,198 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2020-10-28 14:54:06,199 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 14:54:06,199 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2020-10-28 14:54:06,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-28 14:54:06,200 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:54:06,200 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:54:06,200 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 14:54:06,200 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:54:06,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:54:06,201 INFO L82 PathProgramCache]: Analyzing trace with hash -1669828828, now seen corresponding path program 6 times [2020-10-28 14:54:06,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:54:06,201 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [524709416] [2020-10-28 14:54:06,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:54:06,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:54:06,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:54:06,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:54:07,040 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:54:07,041 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-28 14:54:07,041 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:54:07,041 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 828 [2020-10-28 14:54:07,041 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:54:07,042 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:54:07,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 14:54:07,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-28 14:54:07,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-28 14:54:07,042 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:54:07,137 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:54:07,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:54:07,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:54:07,143 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:54:07,143 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:54:07,143 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:54:07,143 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:54:07,143 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:54:07,144 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:54:07,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:54:07,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:54:07,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:54:07,144 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:54:07,150 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-28 14:54:07,151 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [524709416] [2020-10-28 14:54:07,151 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:54:07,151 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 14:54:07,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469597221] [2020-10-28 14:54:07,153 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 14:54:07,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:54:07,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 14:54:07,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-10-28 14:54:07,160 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand 10 states. [2020-10-28 14:54:07,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:54:07,334 INFO L93 Difference]: Finished difference Result 51 states and 53 transitions. [2020-10-28 14:54:07,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 14:54:07,335 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 36 [2020-10-28 14:54:07,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:54:07,336 INFO L225 Difference]: With dead ends: 51 [2020-10-28 14:54:07,336 INFO L226 Difference]: Without dead ends: 44 [2020-10-28 14:54:07,337 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-10-28 14:54:07,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-28 14:54:07,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 40. [2020-10-28 14:54:07,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-28 14:54:07,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2020-10-28 14:54:07,347 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 36 [2020-10-28 14:54:07,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:54:07,348 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2020-10-28 14:54:07,348 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 14:54:07,348 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2020-10-28 14:54:07,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-28 14:54:07,350 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:54:07,350 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:54:07,353 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 14:54:07,353 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:54:07,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:54:07,354 INFO L82 PathProgramCache]: Analyzing trace with hash -1898614297, now seen corresponding path program 7 times [2020-10-28 14:54:07,354 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:54:07,354 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1665736147] [2020-10-28 14:54:07,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:54:07,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:54:07,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:54:07,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:54:08,407 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:54:08,407 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-28 14:54:08,407 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:54:08,408 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1036 [2020-10-28 14:54:08,408 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:54:08,408 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:54:08,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 14:54:08,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-28 14:54:08,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-28 14:54:08,409 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:54:08,513 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:54:08,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:54:08,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:54:08,522 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:54:08,522 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:54:08,522 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:54:08,522 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 14:54:08,523 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:54:08,523 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:54:08,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:54:08,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:54:08,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:54:08,524 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:54:08,529 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-28 14:54:08,529 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1665736147] [2020-10-28 14:54:08,529 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:54:08,529 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-28 14:54:08,529 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134067611] [2020-10-28 14:54:08,530 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 14:54:08,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:54:08,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 14:54:08,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-10-28 14:54:08,531 INFO L87 Difference]: Start difference. First operand 40 states and 41 transitions. Second operand 11 states. [2020-10-28 14:54:08,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:54:08,685 INFO L93 Difference]: Finished difference Result 77 states and 81 transitions. [2020-10-28 14:54:08,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 14:54:08,685 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 39 [2020-10-28 14:54:08,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:54:08,686 INFO L225 Difference]: With dead ends: 77 [2020-10-28 14:54:08,686 INFO L226 Difference]: Without dead ends: 49 [2020-10-28 14:54:08,687 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-10-28 14:54:08,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-28 14:54:08,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 47. [2020-10-28 14:54:08,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-28 14:54:08,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2020-10-28 14:54:08,693 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 39 [2020-10-28 14:54:08,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:54:08,693 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2020-10-28 14:54:08,693 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 14:54:08,694 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2020-10-28 14:54:08,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-28 14:54:08,694 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:54:08,695 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:54:08,695 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 14:54:08,695 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:54:08,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:54:08,696 INFO L82 PathProgramCache]: Analyzing trace with hash 1061869448, now seen corresponding path program 8 times [2020-10-28 14:54:08,696 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:54:08,696 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1954984124] [2020-10-28 14:54:08,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:54:08,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:54:08,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:54:08,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:54:10,606 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:54:10,606 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-28 14:54:10,606 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:54:10,606 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1897 [2020-10-28 14:54:10,607 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:54:10,607 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:54:10,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 14:54:10,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-28 14:54:10,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-28 14:54:10,607 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:54:10,709 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:54:10,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:54:10,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:54:10,714 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:54:10,715 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:54:10,715 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:54:10,715 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:54:10,715 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:54:10,715 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:54:10,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:54:10,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:54:10,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:54:10,716 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:54:10,722 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-28 14:54:10,722 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1954984124] [2020-10-28 14:54:10,722 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:54:10,722 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 14:54:10,723 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064088283] [2020-10-28 14:54:10,723 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 14:54:10,723 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:54:10,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 14:54:10,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-10-28 14:54:10,724 INFO L87 Difference]: Start difference. First operand 47 states and 48 transitions. Second operand 12 states. [2020-10-28 14:54:10,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:54:10,888 INFO L93 Difference]: Finished difference Result 85 states and 88 transitions. [2020-10-28 14:54:10,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 14:54:10,889 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 46 [2020-10-28 14:54:10,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:54:10,890 INFO L225 Difference]: With dead ends: 85 [2020-10-28 14:54:10,890 INFO L226 Difference]: Without dead ends: 54 [2020-10-28 14:54:10,891 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2020-10-28 14:54:10,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-28 14:54:10,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 52. [2020-10-28 14:54:10,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-28 14:54:10,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 53 transitions. [2020-10-28 14:54:10,897 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 53 transitions. Word has length 46 [2020-10-28 14:54:10,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:54:10,898 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 53 transitions. [2020-10-28 14:54:10,898 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 14:54:10,898 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 53 transitions. [2020-10-28 14:54:10,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-28 14:54:10,899 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:54:10,899 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:54:10,899 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-28 14:54:10,899 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:54:10,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:54:10,900 INFO L82 PathProgramCache]: Analyzing trace with hash -194837791, now seen corresponding path program 9 times [2020-10-28 14:54:10,900 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:54:10,900 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1465338835] [2020-10-28 14:54:10,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:54:10,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:54:10,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:54:11,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:54:12,290 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:54:12,290 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-28 14:54:12,290 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:54:12,291 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1375 [2020-10-28 14:54:12,291 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:54:12,291 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:54:12,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 14:54:12,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-10-28 14:54:12,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-28 14:54:12,292 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:54:12,420 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:54:12,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:54:12,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:54:12,435 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:54:12,435 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:54:12,435 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:54:12,435 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-28 14:54:12,436 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:54:12,436 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:54:12,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:54:12,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:54:12,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:54:12,436 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:54:12,445 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2020-10-28 14:54:12,445 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1465338835] [2020-10-28 14:54:12,445 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:54:12,445 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-28 14:54:12,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615836997] [2020-10-28 14:54:12,446 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-28 14:54:12,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:54:12,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-28 14:54:12,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-28 14:54:12,447 INFO L87 Difference]: Start difference. First operand 52 states and 53 transitions. Second operand 13 states. [2020-10-28 14:54:12,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:54:12,617 INFO L93 Difference]: Finished difference Result 93 states and 96 transitions. [2020-10-28 14:54:12,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 14:54:12,618 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 51 [2020-10-28 14:54:12,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:54:12,618 INFO L225 Difference]: With dead ends: 93 [2020-10-28 14:54:12,619 INFO L226 Difference]: Without dead ends: 59 [2020-10-28 14:54:12,622 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2020-10-28 14:54:12,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-28 14:54:12,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 57. [2020-10-28 14:54:12,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-28 14:54:12,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2020-10-28 14:54:12,633 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 51 [2020-10-28 14:54:12,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:54:12,635 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2020-10-28 14:54:12,635 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-28 14:54:12,636 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2020-10-28 14:54:12,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-28 14:54:12,638 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:54:12,638 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:54:12,638 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-28 14:54:12,638 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:54:12,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:54:12,639 INFO L82 PathProgramCache]: Analyzing trace with hash -2143936532, now seen corresponding path program 10 times [2020-10-28 14:54:12,639 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:54:12,639 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [592210157] [2020-10-28 14:54:12,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:54:12,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:54:12,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:54:12,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:54:14,401 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:54:14,401 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-28 14:54:14,401 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:54:14,402 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1744 [2020-10-28 14:54:14,402 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:54:14,402 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:54:14,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 14:54:14,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-28 14:54:14,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-28 14:54:14,403 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:54:14,556 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:54:14,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:54:14,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:54:14,562 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:54:14,562 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:54:14,562 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:54:14,562 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:54:14,563 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:54:14,563 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:54:14,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:54:14,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:54:14,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:54:14,564 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:54:14,581 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-10-28 14:54:14,581 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [592210157] [2020-10-28 14:54:14,581 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:54:14,581 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-28 14:54:14,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808103843] [2020-10-28 14:54:14,583 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-28 14:54:14,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:54:14,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-28 14:54:14,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2020-10-28 14:54:14,584 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand 14 states. [2020-10-28 14:54:14,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:54:14,762 INFO L93 Difference]: Finished difference Result 71 states and 73 transitions. [2020-10-28 14:54:14,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-28 14:54:14,762 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 56 [2020-10-28 14:54:14,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:54:14,764 INFO L225 Difference]: With dead ends: 71 [2020-10-28 14:54:14,764 INFO L226 Difference]: Without dead ends: 64 [2020-10-28 14:54:14,764 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2020-10-28 14:54:14,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-28 14:54:14,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 60. [2020-10-28 14:54:14,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-28 14:54:14,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2020-10-28 14:54:14,776 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 56 [2020-10-28 14:54:14,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:54:14,777 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2020-10-28 14:54:14,777 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-28 14:54:14,777 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2020-10-28 14:54:14,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-28 14:54:14,779 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:54:14,779 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:54:14,780 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-28 14:54:14,780 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:54:14,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:54:14,780 INFO L82 PathProgramCache]: Analyzing trace with hash 106212383, now seen corresponding path program 11 times [2020-10-28 14:54:14,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:54:14,783 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1542441847] [2020-10-28 14:54:14,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:54:14,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:54:14,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:54:14,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:54:17,922 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:54:17,923 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-28 14:54:17,923 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:54:17,923 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3121 [2020-10-28 14:54:17,924 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:54:17,924 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:54:17,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-28 14:54:17,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-28 14:54:17,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-28 14:54:17,925 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:54:18,072 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:54:18,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:54:18,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:54:18,078 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:54:18,078 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:54:18,078 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:54:18,078 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:54:18,078 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:54:18,079 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:54:18,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:54:18,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:54:18,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:54:18,079 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:54:18,089 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-10-28 14:54:18,090 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1542441847] [2020-10-28 14:54:18,090 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:54:18,090 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-28 14:54:18,090 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372589626] [2020-10-28 14:54:18,091 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-28 14:54:18,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:54:18,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-28 14:54:18,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2020-10-28 14:54:18,092 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand 15 states. [2020-10-28 14:54:18,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:54:18,298 INFO L93 Difference]: Finished difference Result 109 states and 113 transitions. [2020-10-28 14:54:18,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-28 14:54:18,299 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 59 [2020-10-28 14:54:18,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:54:18,300 INFO L225 Difference]: With dead ends: 109 [2020-10-28 14:54:18,300 INFO L226 Difference]: Without dead ends: 69 [2020-10-28 14:54:18,301 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2020-10-28 14:54:18,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-28 14:54:18,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 67. [2020-10-28 14:54:18,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-28 14:54:18,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 68 transitions. [2020-10-28 14:54:18,307 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 68 transitions. Word has length 59 [2020-10-28 14:54:18,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:54:18,307 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 68 transitions. [2020-10-28 14:54:18,307 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-28 14:54:18,307 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 68 transitions. [2020-10-28 14:54:18,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-28 14:54:18,308 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:54:18,308 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:54:18,309 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-28 14:54:18,309 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:54:18,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:54:18,309 INFO L82 PathProgramCache]: Analyzing trace with hash 518293584, now seen corresponding path program 12 times [2020-10-28 14:54:18,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:54:18,310 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1769255422] [2020-10-28 14:54:18,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:54:18,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:54:18,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:54:18,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:54:22,904 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:54:22,904 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-28 14:54:22,904 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:54:22,905 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4580 [2020-10-28 14:54:22,905 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:54:22,905 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:54:22,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-28 14:54:22,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-28 14:54:22,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-28 14:54:22,906 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:54:23,055 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:54:23,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:54:23,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:54:23,061 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:54:23,061 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:54:23,062 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:54:23,062 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:54:23,062 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:54:23,062 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:54:23,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:54:23,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:54:23,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:54:23,063 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:54:23,070 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-10-28 14:54:23,071 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1769255422] [2020-10-28 14:54:23,071 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:54:23,071 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-28 14:54:23,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987197837] [2020-10-28 14:54:23,072 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-28 14:54:23,072 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:54:23,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-28 14:54:23,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2020-10-28 14:54:23,073 INFO L87 Difference]: Start difference. First operand 67 states and 68 transitions. Second operand 16 states. [2020-10-28 14:54:23,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:54:23,264 INFO L93 Difference]: Finished difference Result 117 states and 120 transitions. [2020-10-28 14:54:23,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-28 14:54:23,264 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 66 [2020-10-28 14:54:23,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:54:23,265 INFO L225 Difference]: With dead ends: 117 [2020-10-28 14:54:23,265 INFO L226 Difference]: Without dead ends: 74 [2020-10-28 14:54:23,266 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=94, Invalid=212, Unknown=0, NotChecked=0, Total=306 [2020-10-28 14:54:23,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-28 14:54:23,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 72. [2020-10-28 14:54:23,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-28 14:54:23,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 73 transitions. [2020-10-28 14:54:23,272 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 73 transitions. Word has length 66 [2020-10-28 14:54:23,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:54:23,272 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 73 transitions. [2020-10-28 14:54:23,273 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-28 14:54:23,273 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 73 transitions. [2020-10-28 14:54:23,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-28 14:54:23,274 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:54:23,274 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:54:23,274 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-28 14:54:23,274 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:54:23,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:54:23,275 INFO L82 PathProgramCache]: Analyzing trace with hash 21733913, now seen corresponding path program 13 times [2020-10-28 14:54:23,275 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:54:23,275 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1379021992] [2020-10-28 14:54:23,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:54:23,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:54:23,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:54:23,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:54:26,296 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:54:26,297 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-28 14:54:26,297 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:54:26,297 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3006 [2020-10-28 14:54:26,297 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:54:26,297 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:54:26,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-28 14:54:26,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 35 [2020-10-28 14:54:26,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-28 14:54:26,298 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:54:26,458 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:54:26,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:54:26,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:54:26,467 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:54:26,467 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:54:26,467 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:54:26,467 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:54:26,468 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:54:26,468 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:54:26,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:54:26,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:54:26,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:54:26,469 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:54:26,480 INFO L134 CoverageAnalysis]: Checked inductivity of 308 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2020-10-28 14:54:26,481 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1379021992] [2020-10-28 14:54:26,483 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:54:26,483 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-28 14:54:26,484 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378167532] [2020-10-28 14:54:26,484 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-28 14:54:26,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:54:26,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-28 14:54:26,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=175, Unknown=0, NotChecked=0, Total=272 [2020-10-28 14:54:26,485 INFO L87 Difference]: Start difference. First operand 72 states and 73 transitions. Second operand 17 states. [2020-10-28 14:54:26,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:54:26,702 INFO L93 Difference]: Finished difference Result 125 states and 128 transitions. [2020-10-28 14:54:26,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-28 14:54:26,704 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 71 [2020-10-28 14:54:26,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:54:26,704 INFO L225 Difference]: With dead ends: 125 [2020-10-28 14:54:26,704 INFO L226 Difference]: Without dead ends: 79 [2020-10-28 14:54:26,705 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=235, Unknown=0, NotChecked=0, Total=342 [2020-10-28 14:54:26,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-28 14:54:26,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 77. [2020-10-28 14:54:26,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-28 14:54:26,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 78 transitions. [2020-10-28 14:54:26,714 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 78 transitions. Word has length 71 [2020-10-28 14:54:26,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:54:26,714 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 78 transitions. [2020-10-28 14:54:26,714 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-28 14:54:26,714 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 78 transitions. [2020-10-28 14:54:26,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-28 14:54:26,715 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:54:26,715 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:54:26,715 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-28 14:54:26,715 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:54:26,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:54:26,716 INFO L82 PathProgramCache]: Analyzing trace with hash 276844724, now seen corresponding path program 14 times [2020-10-28 14:54:26,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:54:26,722 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [226471931] [2020-10-28 14:54:26,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:54:26,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:54:26,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:54:27,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:54:30,148 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:54:30,149 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-28 14:54:30,149 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:54:30,149 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3405 [2020-10-28 14:54:30,149 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:54:30,149 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:54:30,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-28 14:54:30,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 37 [2020-10-28 14:54:30,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-28 14:54:30,150 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:54:30,346 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:54:30,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:54:30,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:54:30,353 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:54:30,353 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:54:30,353 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:54:30,354 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:54:30,354 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:54:30,354 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:54:30,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:54:30,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:54:30,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:54:30,355 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:54:30,372 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2020-10-28 14:54:30,372 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [226471931] [2020-10-28 14:54:30,372 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:54:30,372 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-28 14:54:30,373 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045420998] [2020-10-28 14:54:30,373 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-28 14:54:30,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:54:30,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-28 14:54:30,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=195, Unknown=0, NotChecked=0, Total=306 [2020-10-28 14:54:30,378 INFO L87 Difference]: Start difference. First operand 77 states and 78 transitions. Second operand 18 states. [2020-10-28 14:54:30,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:54:30,665 INFO L93 Difference]: Finished difference Result 133 states and 136 transitions. [2020-10-28 14:54:30,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-28 14:54:30,665 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 76 [2020-10-28 14:54:30,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:54:30,666 INFO L225 Difference]: With dead ends: 133 [2020-10-28 14:54:30,666 INFO L226 Difference]: Without dead ends: 84 [2020-10-28 14:54:30,671 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=121, Invalid=259, Unknown=0, NotChecked=0, Total=380 [2020-10-28 14:54:30,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-28 14:54:30,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 82. [2020-10-28 14:54:30,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-28 14:54:30,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 83 transitions. [2020-10-28 14:54:30,697 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 83 transitions. Word has length 76 [2020-10-28 14:54:30,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:54:30,697 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 83 transitions. [2020-10-28 14:54:30,697 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-28 14:54:30,697 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 83 transitions. [2020-10-28 14:54:30,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-28 14:54:30,698 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:54:30,698 INFO L422 BasicCegarLoop]: trace histogram [14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:54:30,698 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-28 14:54:30,698 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:54:30,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:54:30,699 INFO L82 PathProgramCache]: Analyzing trace with hash 892948917, now seen corresponding path program 15 times [2020-10-28 14:54:30,699 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:54:30,699 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [946480610] [2020-10-28 14:54:30,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:54:30,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:54:30,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:54:31,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:54:34,570 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:54:34,571 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-28 14:54:34,571 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:54:34,571 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3846 [2020-10-28 14:54:34,571 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:54:34,571 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:54:34,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-28 14:54:34,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 39 [2020-10-28 14:54:34,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-28 14:54:34,572 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:54:34,777 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:54:34,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:54:34,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:54:34,784 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:54:34,784 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:54:34,785 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:54:34,785 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 14:54:34,785 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:54:34,785 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:54:34,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:54:34,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:54:34,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:54:34,786 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:54:34,798 INFO L134 CoverageAnalysis]: Checked inductivity of 429 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2020-10-28 14:54:34,798 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [946480610] [2020-10-28 14:54:34,798 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:54:34,798 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-28 14:54:34,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269969239] [2020-10-28 14:54:34,802 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-28 14:54:34,802 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:54:34,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-28 14:54:34,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=216, Unknown=0, NotChecked=0, Total=342 [2020-10-28 14:54:34,803 INFO L87 Difference]: Start difference. First operand 82 states and 83 transitions. Second operand 19 states. [2020-10-28 14:54:35,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:54:35,045 INFO L93 Difference]: Finished difference Result 141 states and 144 transitions. [2020-10-28 14:54:35,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-28 14:54:35,045 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 81 [2020-10-28 14:54:35,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:54:35,046 INFO L225 Difference]: With dead ends: 141 [2020-10-28 14:54:35,046 INFO L226 Difference]: Without dead ends: 89 [2020-10-28 14:54:35,048 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=136, Invalid=284, Unknown=0, NotChecked=0, Total=420 [2020-10-28 14:54:35,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-28 14:54:35,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 87. [2020-10-28 14:54:35,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-28 14:54:35,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 88 transitions. [2020-10-28 14:54:35,056 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 88 transitions. Word has length 81 [2020-10-28 14:54:35,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:54:35,056 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 88 transitions. [2020-10-28 14:54:35,056 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-28 14:54:35,056 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 88 transitions. [2020-10-28 14:54:35,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-10-28 14:54:35,059 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:54:35,059 INFO L422 BasicCegarLoop]: trace histogram [15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:54:35,059 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-28 14:54:35,059 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:54:35,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:54:35,060 INFO L82 PathProgramCache]: Analyzing trace with hash 1672722712, now seen corresponding path program 16 times [2020-10-28 14:54:35,060 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:54:35,062 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [211169008] [2020-10-28 14:54:35,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:54:35,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:54:35,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:54:35,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:54:39,681 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:54:39,681 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 96 [2020-10-28 14:54:39,681 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:54:39,681 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4588 [2020-10-28 14:54:39,681 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:54:39,681 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:54:39,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-28 14:54:39,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 41 [2020-10-28 14:54:39,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-28 14:54:39,682 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:54:39,957 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:54:39,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:54:39,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:54:39,963 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:54:39,963 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:54:39,963 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:54:39,964 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:54:39,964 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:54:39,964 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:54:39,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:54:39,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:54:39,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:54:39,965 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:54:39,977 INFO L134 CoverageAnalysis]: Checked inductivity of 497 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2020-10-28 14:54:39,977 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [211169008] [2020-10-28 14:54:39,977 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:54:39,977 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-28 14:54:39,978 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638179930] [2020-10-28 14:54:39,978 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-28 14:54:39,978 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:54:39,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-28 14:54:39,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=238, Unknown=0, NotChecked=0, Total=380 [2020-10-28 14:54:39,979 INFO L87 Difference]: Start difference. First operand 87 states and 88 transitions. Second operand 20 states. [2020-10-28 14:54:40,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:54:40,226 INFO L93 Difference]: Finished difference Result 101 states and 103 transitions. [2020-10-28 14:54:40,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-28 14:54:40,227 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 86 [2020-10-28 14:54:40,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:54:40,228 INFO L225 Difference]: With dead ends: 101 [2020-10-28 14:54:40,228 INFO L226 Difference]: Without dead ends: 94 [2020-10-28 14:54:40,229 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=152, Invalid=310, Unknown=0, NotChecked=0, Total=462 [2020-10-28 14:54:40,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-10-28 14:54:40,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 90. [2020-10-28 14:54:40,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-10-28 14:54:40,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 91 transitions. [2020-10-28 14:54:40,238 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 91 transitions. Word has length 86 [2020-10-28 14:54:40,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:54:40,238 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 91 transitions. [2020-10-28 14:54:40,238 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-28 14:54:40,238 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 91 transitions. [2020-10-28 14:54:40,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-10-28 14:54:40,239 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:54:40,239 INFO L422 BasicCegarLoop]: trace histogram [16, 15, 15, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:54:40,239 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-28 14:54:40,239 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:54:40,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:54:40,240 INFO L82 PathProgramCache]: Analyzing trace with hash 1532523379, now seen corresponding path program 17 times [2020-10-28 14:54:40,240 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:54:40,240 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [336837460] [2020-10-28 14:54:40,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:54:40,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:54:40,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:54:40,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:54:44,104 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:54:44,105 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 99 [2020-10-28 14:54:44,105 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:54:44,105 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3848 [2020-10-28 14:54:44,105 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:54:44,105 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:54:44,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-28 14:54:44,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 41 [2020-10-28 14:54:44,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-28 14:54:44,105 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:54:44,365 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:54:44,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:54:44,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:54:44,371 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:54:44,371 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:54:44,371 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:54:44,371 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:54:44,372 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:54:44,372 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:54:44,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:54:44,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:54:44,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:54:44,372 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:54:44,384 INFO L134 CoverageAnalysis]: Checked inductivity of 541 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2020-10-28 14:54:44,385 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [336837460] [2020-10-28 14:54:44,385 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:54:44,385 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-28 14:54:44,385 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592140196] [2020-10-28 14:54:44,386 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-28 14:54:44,386 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:54:44,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-28 14:54:44,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=261, Unknown=0, NotChecked=0, Total=420 [2020-10-28 14:54:44,387 INFO L87 Difference]: Start difference. First operand 90 states and 91 transitions. Second operand 21 states. [2020-10-28 14:54:44,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:54:44,619 INFO L93 Difference]: Finished difference Result 157 states and 161 transitions. [2020-10-28 14:54:44,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-28 14:54:44,620 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 89 [2020-10-28 14:54:44,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:54:44,621 INFO L225 Difference]: With dead ends: 157 [2020-10-28 14:54:44,621 INFO L226 Difference]: Without dead ends: 99 [2020-10-28 14:54:44,622 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=169, Invalid=337, Unknown=0, NotChecked=0, Total=506 [2020-10-28 14:54:44,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-28 14:54:44,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 97. [2020-10-28 14:54:44,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-28 14:54:44,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 98 transitions. [2020-10-28 14:54:44,627 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 98 transitions. Word has length 89 [2020-10-28 14:54:44,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:54:44,627 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 98 transitions. [2020-10-28 14:54:44,627 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-28 14:54:44,627 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 98 transitions. [2020-10-28 14:54:44,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-10-28 14:54:44,628 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:54:44,628 INFO L422 BasicCegarLoop]: trace histogram [17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:54:44,628 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-28 14:54:44,628 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:54:44,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:54:44,629 INFO L82 PathProgramCache]: Analyzing trace with hash 615055740, now seen corresponding path program 18 times [2020-10-28 14:54:44,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:54:44,629 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1305814677] [2020-10-28 14:54:44,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:54:44,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:54:44,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:54:44,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:54:49,649 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:54:49,650 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 106 [2020-10-28 14:54:49,650 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:54:49,650 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-28 14:54:49,650 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:54:49,650 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:54:49,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-28 14:54:49,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 45 [2020-10-28 14:54:49,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-28 14:54:49,650 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:54:49,928 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:54:49,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:54:49,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:54:49,933 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:54:49,933 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:54:49,933 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:54:49,933 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:54:49,933 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:54:49,933 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:54:49,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:54:49,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:54:49,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:54:49,934 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:54:49,954 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2020-10-28 14:54:49,955 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1305814677] [2020-10-28 14:54:49,955 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:54:49,955 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-28 14:54:49,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262370067] [2020-10-28 14:54:49,956 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-28 14:54:49,956 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:54:49,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-28 14:54:49,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=285, Unknown=0, NotChecked=0, Total=462 [2020-10-28 14:54:49,957 INFO L87 Difference]: Start difference. First operand 97 states and 98 transitions. Second operand 22 states. [2020-10-28 14:54:50,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:54:50,244 INFO L93 Difference]: Finished difference Result 165 states and 168 transitions. [2020-10-28 14:54:50,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-28 14:54:50,245 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 96 [2020-10-28 14:54:50,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:54:50,246 INFO L225 Difference]: With dead ends: 165 [2020-10-28 14:54:50,246 INFO L226 Difference]: Without dead ends: 104 [2020-10-28 14:54:50,247 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=187, Invalid=365, Unknown=0, NotChecked=0, Total=552 [2020-10-28 14:54:50,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-10-28 14:54:50,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 102. [2020-10-28 14:54:50,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-10-28 14:54:50,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 103 transitions. [2020-10-28 14:54:50,252 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 103 transitions. Word has length 96 [2020-10-28 14:54:50,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:54:50,253 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 103 transitions. [2020-10-28 14:54:50,253 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-28 14:54:50,253 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 103 transitions. [2020-10-28 14:54:50,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-10-28 14:54:50,254 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:54:50,254 INFO L422 BasicCegarLoop]: trace histogram [18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:54:50,254 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-28 14:54:50,254 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:54:50,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:54:50,255 INFO L82 PathProgramCache]: Analyzing trace with hash -9162515, now seen corresponding path program 19 times [2020-10-28 14:54:50,255 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:54:50,255 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1376622751] [2020-10-28 14:54:50,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:54:50,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:54:50,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:54:50,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:54:55,273 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:54:55,274 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 111 [2020-10-28 14:54:55,274 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:54:55,274 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-28 14:54:55,274 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:54:55,274 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:54:55,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-28 14:54:55,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 47 [2020-10-28 14:54:55,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-28 14:54:55,275 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:54:55,565 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:54:55,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:54:55,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:54:55,570 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:54:55,570 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:54:55,570 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:54:55,570 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:54:55,570 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:54:55,570 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:54:55,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:54:55,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:54:55,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:54:55,571 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:54:55,580 INFO L134 CoverageAnalysis]: Checked inductivity of 731 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2020-10-28 14:54:55,580 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1376622751] [2020-10-28 14:54:55,580 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:54:55,581 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-28 14:54:55,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742508336] [2020-10-28 14:54:55,581 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-28 14:54:55,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:54:55,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-28 14:54:55,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=310, Unknown=0, NotChecked=0, Total=506 [2020-10-28 14:54:55,583 INFO L87 Difference]: Start difference. First operand 102 states and 103 transitions. Second operand 23 states. [2020-10-28 14:54:55,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:54:55,910 INFO L93 Difference]: Finished difference Result 173 states and 176 transitions. [2020-10-28 14:54:55,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-28 14:54:55,913 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 101 [2020-10-28 14:54:55,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:54:55,914 INFO L225 Difference]: With dead ends: 173 [2020-10-28 14:54:55,915 INFO L226 Difference]: Without dead ends: 109 [2020-10-28 14:54:55,916 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=206, Invalid=394, Unknown=0, NotChecked=0, Total=600 [2020-10-28 14:54:55,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-28 14:54:55,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 107. [2020-10-28 14:54:55,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-10-28 14:54:55,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 108 transitions. [2020-10-28 14:54:55,923 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 108 transitions. Word has length 101 [2020-10-28 14:54:55,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:54:55,923 INFO L481 AbstractCegarLoop]: Abstraction has 107 states and 108 transitions. [2020-10-28 14:54:55,923 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-28 14:54:55,923 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 108 transitions. [2020-10-28 14:54:55,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-10-28 14:54:55,925 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:54:55,925 INFO L422 BasicCegarLoop]: trace histogram [19, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:54:55,925 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-28 14:54:55,926 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:54:55,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:54:55,926 INFO L82 PathProgramCache]: Analyzing trace with hash 1091201504, now seen corresponding path program 20 times [2020-10-28 14:54:55,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:54:55,926 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1339670052] [2020-10-28 14:54:55,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:54:55,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:54:55,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:54:56,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:55:00,953 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:55:00,953 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 116 [2020-10-28 14:55:00,953 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:55:00,953 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-28 14:55:00,953 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:55:00,953 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:55:00,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-28 14:55:00,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 49 [2020-10-28 14:55:00,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-28 14:55:00,954 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:55:01,263 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:55:01,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:55:01,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:55:01,269 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:55:01,269 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:55:01,269 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:55:01,270 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:55:01,270 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:55:01,270 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:55:01,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:55:01,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:55:01,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:55:01,270 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:55:01,284 INFO L134 CoverageAnalysis]: Checked inductivity of 819 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2020-10-28 14:55:01,284 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1339670052] [2020-10-28 14:55:01,284 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:55:01,285 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-28 14:55:01,286 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962610671] [2020-10-28 14:55:01,287 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-28 14:55:01,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:55:01,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-28 14:55:01,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=336, Unknown=0, NotChecked=0, Total=552 [2020-10-28 14:55:01,291 INFO L87 Difference]: Start difference. First operand 107 states and 108 transitions. Second operand 24 states. [2020-10-28 14:55:01,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:55:01,580 INFO L93 Difference]: Finished difference Result 181 states and 184 transitions. [2020-10-28 14:55:01,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-28 14:55:01,585 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 106 [2020-10-28 14:55:01,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:55:01,586 INFO L225 Difference]: With dead ends: 181 [2020-10-28 14:55:01,586 INFO L226 Difference]: Without dead ends: 114 [2020-10-28 14:55:01,587 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=226, Invalid=424, Unknown=0, NotChecked=0, Total=650 [2020-10-28 14:55:01,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-10-28 14:55:01,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 112. [2020-10-28 14:55:01,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-10-28 14:55:01,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 113 transitions. [2020-10-28 14:55:01,599 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 113 transitions. Word has length 106 [2020-10-28 14:55:01,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:55:01,599 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 113 transitions. [2020-10-28 14:55:01,600 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-28 14:55:01,600 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 113 transitions. [2020-10-28 14:55:01,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-10-28 14:55:01,601 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:55:01,601 INFO L422 BasicCegarLoop]: trace histogram [20, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:55:01,601 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-28 14:55:01,601 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:55:01,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:55:01,601 INFO L82 PathProgramCache]: Analyzing trace with hash 1097654409, now seen corresponding path program 21 times [2020-10-28 14:55:01,602 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:55:01,602 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [880345123] [2020-10-28 14:55:01,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:55:01,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:55:01,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:55:02,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:55:06,636 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:55:06,636 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 121 [2020-10-28 14:55:06,636 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:55:06,636 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-28 14:55:06,636 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:55:06,637 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:55:06,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-28 14:55:06,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 51 [2020-10-28 14:55:06,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-10-28 14:55:06,637 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:55:06,995 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:55:06,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:55:06,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:55:06,999 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:55:07,000 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:55:07,000 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:55:07,000 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 14:55:07,000 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:55:07,000 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:55:07,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:55:07,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:55:07,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:55:07,000 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:55:07,013 INFO L134 CoverageAnalysis]: Checked inductivity of 912 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 361 trivial. 0 not checked. [2020-10-28 14:55:07,013 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [880345123] [2020-10-28 14:55:07,013 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:55:07,014 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-28 14:55:07,014 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889724459] [2020-10-28 14:55:07,014 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-28 14:55:07,014 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:55:07,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-28 14:55:07,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=237, Invalid=363, Unknown=0, NotChecked=0, Total=600 [2020-10-28 14:55:07,015 INFO L87 Difference]: Start difference. First operand 112 states and 113 transitions. Second operand 25 states. [2020-10-28 14:55:07,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:55:07,293 INFO L93 Difference]: Finished difference Result 189 states and 192 transitions. [2020-10-28 14:55:07,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-28 14:55:07,294 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 111 [2020-10-28 14:55:07,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:55:07,295 INFO L225 Difference]: With dead ends: 189 [2020-10-28 14:55:07,296 INFO L226 Difference]: Without dead ends: 119 [2020-10-28 14:55:07,297 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=247, Invalid=455, Unknown=0, NotChecked=0, Total=702 [2020-10-28 14:55:07,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-10-28 14:55:07,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 117. [2020-10-28 14:55:07,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-10-28 14:55:07,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 118 transitions. [2020-10-28 14:55:07,303 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 118 transitions. Word has length 111 [2020-10-28 14:55:07,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:55:07,303 INFO L481 AbstractCegarLoop]: Abstraction has 117 states and 118 transitions. [2020-10-28 14:55:07,303 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-28 14:55:07,303 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 118 transitions. [2020-10-28 14:55:07,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-10-28 14:55:07,304 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:55:07,304 INFO L422 BasicCegarLoop]: trace histogram [21, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:55:07,305 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-28 14:55:07,305 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:55:07,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:55:07,305 INFO L82 PathProgramCache]: Analyzing trace with hash 1812083268, now seen corresponding path program 22 times [2020-10-28 14:55:07,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:55:07,306 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [180207679] [2020-10-28 14:55:07,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:55:07,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:55:07,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:55:07,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:55:12,334 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:55:12,335 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 126 [2020-10-28 14:55:12,335 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:55:12,335 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-28 14:55:12,335 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:55:12,335 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:55:12,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-28 14:55:12,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 53 [2020-10-28 14:55:12,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-28 14:55:12,335 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:55:12,685 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:55:12,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:55:12,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:55:12,690 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:55:12,690 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:55:12,690 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:55:12,690 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:55:12,690 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:55:12,691 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:55:12,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:55:12,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:55:12,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:55:12,691 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:55:12,704 INFO L134 CoverageAnalysis]: Checked inductivity of 1010 backedges. 0 proven. 610 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2020-10-28 14:55:12,705 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [180207679] [2020-10-28 14:55:12,705 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:55:12,705 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-28 14:55:12,705 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323610162] [2020-10-28 14:55:12,705 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-28 14:55:12,706 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:55:12,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-28 14:55:12,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=259, Invalid=391, Unknown=0, NotChecked=0, Total=650 [2020-10-28 14:55:12,707 INFO L87 Difference]: Start difference. First operand 117 states and 118 transitions. Second operand 26 states. [2020-10-28 14:55:13,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:55:13,047 INFO L93 Difference]: Finished difference Result 197 states and 200 transitions. [2020-10-28 14:55:13,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-28 14:55:13,047 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 116 [2020-10-28 14:55:13,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:55:13,049 INFO L225 Difference]: With dead ends: 197 [2020-10-28 14:55:13,049 INFO L226 Difference]: Without dead ends: 124 [2020-10-28 14:55:13,050 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=269, Invalid=487, Unknown=0, NotChecked=0, Total=756 [2020-10-28 14:55:13,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-10-28 14:55:13,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 122. [2020-10-28 14:55:13,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-10-28 14:55:13,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 123 transitions. [2020-10-28 14:55:13,056 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 123 transitions. Word has length 116 [2020-10-28 14:55:13,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:55:13,057 INFO L481 AbstractCegarLoop]: Abstraction has 122 states and 123 transitions. [2020-10-28 14:55:13,057 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-28 14:55:13,057 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 123 transitions. [2020-10-28 14:55:13,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-10-28 14:55:13,058 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:55:13,058 INFO L422 BasicCegarLoop]: trace histogram [22, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:55:13,058 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-28 14:55:13,059 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:55:13,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:55:13,059 INFO L82 PathProgramCache]: Analyzing trace with hash -1712713691, now seen corresponding path program 23 times [2020-10-28 14:55:13,059 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:55:13,059 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1702748262] [2020-10-28 14:55:13,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:55:13,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:55:13,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:55:13,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:55:18,096 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:55:18,096 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 131 [2020-10-28 14:55:18,096 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:55:18,096 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5018 [2020-10-28 14:55:18,096 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:55:18,097 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:55:18,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-28 14:55:18,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 55 [2020-10-28 14:55:18,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-28 14:55:18,097 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:55:18,474 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:55:18,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:55:18,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:55:18,481 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:55:18,481 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:55:18,481 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:55:18,481 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:55:18,481 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:55:18,481 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:55:18,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:55:18,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:55:18,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:55:18,482 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:55:18,498 INFO L134 CoverageAnalysis]: Checked inductivity of 1113 backedges. 0 proven. 672 refuted. 0 times theorem prover too weak. 441 trivial. 0 not checked. [2020-10-28 14:55:18,499 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1702748262] [2020-10-28 14:55:18,499 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:55:18,499 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-28 14:55:18,499 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390645025] [2020-10-28 14:55:18,499 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-28 14:55:18,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:55:18,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-28 14:55:18,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=282, Invalid=420, Unknown=0, NotChecked=0, Total=702 [2020-10-28 14:55:18,501 INFO L87 Difference]: Start difference. First operand 122 states and 123 transitions. Second operand 27 states. [2020-10-28 14:55:18,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:55:18,840 INFO L93 Difference]: Finished difference Result 205 states and 208 transitions. [2020-10-28 14:55:18,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-28 14:55:18,840 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 121 [2020-10-28 14:55:18,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:55:18,841 INFO L225 Difference]: With dead ends: 205 [2020-10-28 14:55:18,841 INFO L226 Difference]: Without dead ends: 129 [2020-10-28 14:55:18,843 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=292, Invalid=520, Unknown=0, NotChecked=0, Total=812 [2020-10-28 14:55:18,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-10-28 14:55:18,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 127. [2020-10-28 14:55:18,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-10-28 14:55:18,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 128 transitions. [2020-10-28 14:55:18,854 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 128 transitions. Word has length 121 [2020-10-28 14:55:18,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:55:18,854 INFO L481 AbstractCegarLoop]: Abstraction has 127 states and 128 transitions. [2020-10-28 14:55:18,854 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-28 14:55:18,854 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 128 transitions. [2020-10-28 14:55:18,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-10-28 14:55:18,856 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:55:18,856 INFO L422 BasicCegarLoop]: trace histogram [23, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:55:18,856 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-28 14:55:18,856 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:55:18,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:55:18,859 INFO L82 PathProgramCache]: Analyzing trace with hash 37395112, now seen corresponding path program 24 times [2020-10-28 14:55:18,860 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:55:18,860 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1491189835] [2020-10-28 14:55:18,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:55:18,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:55:18,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:55:19,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:55:23,909 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:55:23,910 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 136 [2020-10-28 14:55:23,910 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:55:23,910 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5021 [2020-10-28 14:55:23,910 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:55:23,910 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:55:23,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-28 14:55:23,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 57 [2020-10-28 14:55:23,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-28 14:55:23,911 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:55:24,359 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:55:24,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:55:24,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:55:24,365 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:55:24,366 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:55:24,366 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:55:24,366 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:55:24,366 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:55:24,366 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:55:24,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:55:24,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:55:24,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:55:24,367 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:55:24,384 INFO L134 CoverageAnalysis]: Checked inductivity of 1221 backedges. 0 proven. 737 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2020-10-28 14:55:24,385 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1491189835] [2020-10-28 14:55:24,385 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:55:24,385 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-28 14:55:24,385 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124126012] [2020-10-28 14:55:24,386 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-28 14:55:24,386 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:55:24,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-28 14:55:24,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=450, Unknown=0, NotChecked=0, Total=756 [2020-10-28 14:55:24,387 INFO L87 Difference]: Start difference. First operand 127 states and 128 transitions. Second operand 28 states. [2020-10-28 14:55:24,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:55:24,742 INFO L93 Difference]: Finished difference Result 141 states and 143 transitions. [2020-10-28 14:55:24,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-28 14:55:24,742 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 126 [2020-10-28 14:55:24,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:55:24,744 INFO L225 Difference]: With dead ends: 141 [2020-10-28 14:55:24,744 INFO L226 Difference]: Without dead ends: 134 [2020-10-28 14:55:24,744 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=316, Invalid=554, Unknown=0, NotChecked=0, Total=870 [2020-10-28 14:55:24,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-10-28 14:55:24,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 130. [2020-10-28 14:55:24,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-10-28 14:55:24,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 131 transitions. [2020-10-28 14:55:24,753 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 131 transitions. Word has length 126 [2020-10-28 14:55:24,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:55:24,756 INFO L481 AbstractCegarLoop]: Abstraction has 130 states and 131 transitions. [2020-10-28 14:55:24,756 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-28 14:55:24,756 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 131 transitions. [2020-10-28 14:55:24,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-10-28 14:55:24,757 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:55:24,758 INFO L422 BasicCegarLoop]: trace histogram [24, 23, 23, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:55:24,758 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-28 14:55:24,758 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:55:24,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:55:24,758 INFO L82 PathProgramCache]: Analyzing trace with hash 1302030307, now seen corresponding path program 25 times [2020-10-28 14:55:24,759 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:55:24,759 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1978624396] [2020-10-28 14:55:24,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:55:24,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:55:24,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:55:25,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:55:29,808 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:55:29,808 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 139 [2020-10-28 14:55:29,808 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:55:29,808 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5021 [2020-10-28 14:55:29,808 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:55:29,809 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:55:29,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-28 14:55:29,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 57 [2020-10-28 14:55:29,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-10-28 14:55:29,809 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:55:30,256 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:55:30,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:55:30,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:55:30,262 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:55:30,262 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:55:30,262 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:55:30,262 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:55:30,262 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:55:30,262 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:55:30,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:55:30,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:55:30,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:55:30,263 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:55:30,277 INFO L134 CoverageAnalysis]: Checked inductivity of 1289 backedges. 0 proven. 805 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2020-10-28 14:55:30,277 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1978624396] [2020-10-28 14:55:30,277 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:55:30,277 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-28 14:55:30,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797970357] [2020-10-28 14:55:30,278 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-28 14:55:30,278 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:55:30,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-28 14:55:30,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=331, Invalid=481, Unknown=0, NotChecked=0, Total=812 [2020-10-28 14:55:30,279 INFO L87 Difference]: Start difference. First operand 130 states and 131 transitions. Second operand 29 states. [2020-10-28 14:55:30,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:55:30,663 INFO L93 Difference]: Finished difference Result 221 states and 225 transitions. [2020-10-28 14:55:30,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-28 14:55:30,663 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 129 [2020-10-28 14:55:30,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:55:30,665 INFO L225 Difference]: With dead ends: 221 [2020-10-28 14:55:30,665 INFO L226 Difference]: Without dead ends: 139 [2020-10-28 14:55:30,666 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=341, Invalid=589, Unknown=0, NotChecked=0, Total=930 [2020-10-28 14:55:30,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-10-28 14:55:30,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 137. [2020-10-28 14:55:30,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-10-28 14:55:30,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 138 transitions. [2020-10-28 14:55:30,672 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 138 transitions. Word has length 129 [2020-10-28 14:55:30,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:55:30,673 INFO L481 AbstractCegarLoop]: Abstraction has 137 states and 138 transitions. [2020-10-28 14:55:30,673 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-28 14:55:30,673 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 138 transitions. [2020-10-28 14:55:30,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-10-28 14:55:30,674 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:55:30,674 INFO L422 BasicCegarLoop]: trace histogram [25, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:55:30,675 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-28 14:55:30,675 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:55:30,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:55:30,675 INFO L82 PathProgramCache]: Analyzing trace with hash -304225524, now seen corresponding path program 26 times [2020-10-28 14:55:30,675 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:55:30,676 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2081384650] [2020-10-28 14:55:30,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:55:30,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:55:30,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:55:31,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:55:35,706 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:55:35,706 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 146 [2020-10-28 14:55:35,706 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:55:35,707 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-28 14:55:35,707 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:55:35,707 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:55:35,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-28 14:55:35,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 61 [2020-10-28 14:55:35,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-10-28 14:55:35,707 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:55:36,246 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:55:36,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:55:36,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:55:36,255 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:55:36,255 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:55:36,255 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:55:36,255 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 14:55:36,255 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:55:36,256 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:55:36,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:55:36,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:55:36,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:55:36,256 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:55:36,279 INFO L134 CoverageAnalysis]: Checked inductivity of 1452 backedges. 0 proven. 876 refuted. 0 times theorem prover too weak. 576 trivial. 0 not checked. [2020-10-28 14:55:36,279 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2081384650] [2020-10-28 14:55:36,279 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:55:36,279 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-28 14:55:36,280 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515035464] [2020-10-28 14:55:36,280 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-28 14:55:36,280 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:55:36,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-28 14:55:36,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=357, Invalid=513, Unknown=0, NotChecked=0, Total=870 [2020-10-28 14:55:36,282 INFO L87 Difference]: Start difference. First operand 137 states and 138 transitions. Second operand 30 states. [2020-10-28 14:55:36,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:55:36,637 INFO L93 Difference]: Finished difference Result 229 states and 232 transitions. [2020-10-28 14:55:36,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-28 14:55:36,637 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 136 [2020-10-28 14:55:36,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:55:36,638 INFO L225 Difference]: With dead ends: 229 [2020-10-28 14:55:36,638 INFO L226 Difference]: Without dead ends: 144 [2020-10-28 14:55:36,639 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=367, Invalid=625, Unknown=0, NotChecked=0, Total=992 [2020-10-28 14:55:36,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-10-28 14:55:36,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 142. [2020-10-28 14:55:36,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-28 14:55:36,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 143 transitions. [2020-10-28 14:55:36,650 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 143 transitions. Word has length 136 [2020-10-28 14:55:36,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:55:36,650 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 143 transitions. [2020-10-28 14:55:36,650 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-28 14:55:36,650 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 143 transitions. [2020-10-28 14:55:36,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2020-10-28 14:55:36,652 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:55:36,652 INFO L422 BasicCegarLoop]: trace histogram [26, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:55:36,652 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-28 14:55:36,652 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:55:36,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:55:36,653 INFO L82 PathProgramCache]: Analyzing trace with hash 1934159709, now seen corresponding path program 27 times [2020-10-28 14:55:36,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:55:36,653 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2026010533] [2020-10-28 14:55:36,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:55:36,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:55:36,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:55:37,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:55:41,690 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:55:41,691 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 151 [2020-10-28 14:55:41,691 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:55:41,691 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-28 14:55:41,691 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:55:41,691 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:55:41,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-28 14:55:41,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 63 [2020-10-28 14:55:41,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 83 [2020-10-28 14:55:41,691 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:55:42,183 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:55:42,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:55:42,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:55:42,190 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:55:42,190 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:55:42,191 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:55:42,191 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:55:42,191 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:55:42,191 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:55:42,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:55:42,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:55:42,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:55:42,192 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:55:42,216 INFO L134 CoverageAnalysis]: Checked inductivity of 1575 backedges. 0 proven. 950 refuted. 0 times theorem prover too weak. 625 trivial. 0 not checked. [2020-10-28 14:55:42,217 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2026010533] [2020-10-28 14:55:42,217 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:55:42,217 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-28 14:55:42,217 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877205082] [2020-10-28 14:55:42,219 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-28 14:55:42,219 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:55:42,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-28 14:55:42,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=384, Invalid=546, Unknown=0, NotChecked=0, Total=930 [2020-10-28 14:55:42,224 INFO L87 Difference]: Start difference. First operand 142 states and 143 transitions. Second operand 31 states. [2020-10-28 14:55:42,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:55:42,640 INFO L93 Difference]: Finished difference Result 156 states and 158 transitions. [2020-10-28 14:55:42,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-28 14:55:42,641 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 141 [2020-10-28 14:55:42,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:55:42,642 INFO L225 Difference]: With dead ends: 156 [2020-10-28 14:55:42,643 INFO L226 Difference]: Without dead ends: 149 [2020-10-28 14:55:42,644 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=394, Invalid=662, Unknown=0, NotChecked=0, Total=1056 [2020-10-28 14:55:42,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2020-10-28 14:55:42,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 145. [2020-10-28 14:55:42,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-10-28 14:55:42,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 146 transitions. [2020-10-28 14:55:42,659 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 146 transitions. Word has length 141 [2020-10-28 14:55:42,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:55:42,659 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 146 transitions. [2020-10-28 14:55:42,659 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-28 14:55:42,660 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 146 transitions. [2020-10-28 14:55:42,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2020-10-28 14:55:42,662 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:55:42,662 INFO L422 BasicCegarLoop]: trace histogram [27, 26, 26, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:55:42,662 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-28 14:55:42,662 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:55:42,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:55:42,663 INFO L82 PathProgramCache]: Analyzing trace with hash -1068573938, now seen corresponding path program 28 times [2020-10-28 14:55:42,663 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:55:42,663 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [581380904] [2020-10-28 14:55:42,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:55:42,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:55:42,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:55:43,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:55:47,692 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:55:47,692 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 154 [2020-10-28 14:55:47,692 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:55:47,692 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-28 14:55:47,692 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:55:47,692 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:55:47,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-28 14:55:47,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 63 [2020-10-28 14:55:47,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 86 [2020-10-28 14:55:47,693 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:55:48,226 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:55:48,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:55:48,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:55:48,230 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:55:48,230 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:55:48,230 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:55:48,231 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 14:55:48,231 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:55:48,231 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:55:48,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:55:48,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:55:48,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:55:48,231 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:55:48,248 INFO L134 CoverageAnalysis]: Checked inductivity of 1652 backedges. 0 proven. 1027 refuted. 0 times theorem prover too weak. 625 trivial. 0 not checked. [2020-10-28 14:55:48,248 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [581380904] [2020-10-28 14:55:48,249 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:55:48,249 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-28 14:55:48,249 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469334080] [2020-10-28 14:55:48,249 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-28 14:55:48,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:55:48,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-28 14:55:48,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=412, Invalid=580, Unknown=0, NotChecked=0, Total=992 [2020-10-28 14:55:48,251 INFO L87 Difference]: Start difference. First operand 145 states and 146 transitions. Second operand 32 states. [2020-10-28 14:55:48,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:55:48,664 INFO L93 Difference]: Finished difference Result 245 states and 249 transitions. [2020-10-28 14:55:48,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-28 14:55:48,665 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 144 [2020-10-28 14:55:48,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:55:48,666 INFO L225 Difference]: With dead ends: 245 [2020-10-28 14:55:48,666 INFO L226 Difference]: Without dead ends: 154 [2020-10-28 14:55:48,667 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=422, Invalid=700, Unknown=0, NotChecked=0, Total=1122 [2020-10-28 14:55:48,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-10-28 14:55:48,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 152. [2020-10-28 14:55:48,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-10-28 14:55:48,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 153 transitions. [2020-10-28 14:55:48,674 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 153 transitions. Word has length 144 [2020-10-28 14:55:48,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:55:48,674 INFO L481 AbstractCegarLoop]: Abstraction has 152 states and 153 transitions. [2020-10-28 14:55:48,674 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-28 14:55:48,674 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 153 transitions. [2020-10-28 14:55:48,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2020-10-28 14:55:48,675 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:55:48,675 INFO L422 BasicCegarLoop]: trace histogram [28, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:55:48,675 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-28 14:55:48,676 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:55:48,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:55:48,676 INFO L82 PathProgramCache]: Analyzing trace with hash -1009377543, now seen corresponding path program 29 times [2020-10-28 14:55:48,676 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:55:48,676 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1185377104] [2020-10-28 14:55:48,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:55:48,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:55:48,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:55:50,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:55:53,720 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:55:53,721 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 161 [2020-10-28 14:55:53,721 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:55:53,721 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5021 [2020-10-28 14:55:53,721 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:55:53,721 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:55:53,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-28 14:55:53,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 67 [2020-10-28 14:55:53,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 89 [2020-10-28 14:55:53,721 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:55:54,238 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:55:54,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:55:54,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:55:54,247 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:55:54,247 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:55:54,247 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:55:54,247 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 14:55:54,247 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:55:54,248 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:55:54,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:55:54,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:55:54,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:55:54,248 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:55:54,277 INFO L134 CoverageAnalysis]: Checked inductivity of 1836 backedges. 0 proven. 1107 refuted. 0 times theorem prover too weak. 729 trivial. 0 not checked. [2020-10-28 14:55:54,278 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1185377104] [2020-10-28 14:55:54,279 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:55:54,279 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-28 14:55:54,279 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502283681] [2020-10-28 14:55:54,280 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-28 14:55:54,280 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:55:54,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-28 14:55:54,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=441, Invalid=615, Unknown=0, NotChecked=0, Total=1056 [2020-10-28 14:55:54,281 INFO L87 Difference]: Start difference. First operand 152 states and 153 transitions. Second operand 33 states. [2020-10-28 14:55:54,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:55:54,654 INFO L93 Difference]: Finished difference Result 253 states and 256 transitions. [2020-10-28 14:55:54,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-28 14:55:54,655 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 151 [2020-10-28 14:55:54,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:55:54,658 INFO L225 Difference]: With dead ends: 253 [2020-10-28 14:55:54,658 INFO L226 Difference]: Without dead ends: 159 [2020-10-28 14:55:54,660 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=451, Invalid=739, Unknown=0, NotChecked=0, Total=1190 [2020-10-28 14:55:54,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-10-28 14:55:54,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 157. [2020-10-28 14:55:54,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-10-28 14:55:54,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 158 transitions. [2020-10-28 14:55:54,672 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 158 transitions. Word has length 151 [2020-10-28 14:55:54,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:55:54,672 INFO L481 AbstractCegarLoop]: Abstraction has 157 states and 158 transitions. [2020-10-28 14:55:54,672 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-28 14:55:54,672 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 158 transitions. [2020-10-28 14:55:54,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2020-10-28 14:55:54,674 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:55:54,674 INFO L422 BasicCegarLoop]: trace histogram [29, 28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:55:54,674 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-28 14:55:54,674 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:55:54,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:55:54,675 INFO L82 PathProgramCache]: Analyzing trace with hash -1987177516, now seen corresponding path program 30 times [2020-10-28 14:55:54,675 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:55:54,675 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1142111615] [2020-10-28 14:55:54,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:55:54,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:55:54,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:55:55,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:55:59,726 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:55:59,726 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 166 [2020-10-28 14:55:59,726 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:55:59,727 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5029 [2020-10-28 14:55:59,727 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:55:59,727 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:55:59,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-28 14:55:59,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 69 [2020-10-28 14:55:59,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 92 [2020-10-28 14:55:59,727 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:56:00,293 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:56:00,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:56:00,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:56:00,299 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:56:00,299 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:56:00,299 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:56:00,299 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 14:56:00,299 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:56:00,299 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:56:00,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:56:00,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:56:00,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:56:00,299 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:56:00,316 INFO L134 CoverageAnalysis]: Checked inductivity of 1974 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 784 trivial. 0 not checked. [2020-10-28 14:56:00,316 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1142111615] [2020-10-28 14:56:00,316 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:56:00,317 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-28 14:56:00,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259136024] [2020-10-28 14:56:00,317 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-28 14:56:00,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:56:00,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-28 14:56:00,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=471, Invalid=651, Unknown=0, NotChecked=0, Total=1122 [2020-10-28 14:56:00,318 INFO L87 Difference]: Start difference. First operand 157 states and 158 transitions. Second operand 34 states. [2020-10-28 14:56:00,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:56:00,751 INFO L93 Difference]: Finished difference Result 261 states and 264 transitions. [2020-10-28 14:56:00,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-28 14:56:00,752 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 156 [2020-10-28 14:56:00,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:56:00,753 INFO L225 Difference]: With dead ends: 261 [2020-10-28 14:56:00,754 INFO L226 Difference]: Without dead ends: 164 [2020-10-28 14:56:00,755 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=481, Invalid=779, Unknown=0, NotChecked=0, Total=1260 [2020-10-28 14:56:00,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2020-10-28 14:56:00,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 162. [2020-10-28 14:56:00,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-10-28 14:56:00,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 163 transitions. [2020-10-28 14:56:00,761 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 163 transitions. Word has length 156 [2020-10-28 14:56:00,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:56:00,761 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 163 transitions. [2020-10-28 14:56:00,761 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-28 14:56:00,761 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 163 transitions. [2020-10-28 14:56:00,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2020-10-28 14:56:00,762 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:56:00,762 INFO L422 BasicCegarLoop]: trace histogram [30, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:56:00,762 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-28 14:56:00,762 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:56:00,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:56:00,763 INFO L82 PathProgramCache]: Analyzing trace with hash 37670549, now seen corresponding path program 31 times [2020-10-28 14:56:00,763 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:56:00,763 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [871795441] [2020-10-28 14:56:00,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:56:00,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:56:00,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:56:02,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:56:05,819 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:56:05,819 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 171 [2020-10-28 14:56:05,819 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:56:05,819 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5033 [2020-10-28 14:56:05,820 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:56:05,820 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:56:05,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-28 14:56:05,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 71 [2020-10-28 14:56:05,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 95 [2020-10-28 14:56:05,820 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:56:06,443 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:56:06,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:56:06,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:56:06,448 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:56:06,448 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:56:06,448 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:56:06,448 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:56:06,448 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:56:06,448 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:56:06,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:56:06,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:56:06,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:56:06,449 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:56:06,477 INFO L134 CoverageAnalysis]: Checked inductivity of 2117 backedges. 0 proven. 1276 refuted. 0 times theorem prover too weak. 841 trivial. 0 not checked. [2020-10-28 14:56:06,477 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [871795441] [2020-10-28 14:56:06,482 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:56:06,482 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-28 14:56:06,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264022346] [2020-10-28 14:56:06,483 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-28 14:56:06,483 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:56:06,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-28 14:56:06,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=502, Invalid=688, Unknown=0, NotChecked=0, Total=1190 [2020-10-28 14:56:06,484 INFO L87 Difference]: Start difference. First operand 162 states and 163 transitions. Second operand 35 states. [2020-10-28 14:56:06,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:56:06,948 INFO L93 Difference]: Finished difference Result 269 states and 272 transitions. [2020-10-28 14:56:06,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-28 14:56:06,948 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 161 [2020-10-28 14:56:06,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:56:06,950 INFO L225 Difference]: With dead ends: 269 [2020-10-28 14:56:06,950 INFO L226 Difference]: Without dead ends: 169 [2020-10-28 14:56:06,951 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=512, Invalid=820, Unknown=0, NotChecked=0, Total=1332 [2020-10-28 14:56:06,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2020-10-28 14:56:06,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 167. [2020-10-28 14:56:06,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-10-28 14:56:06,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 168 transitions. [2020-10-28 14:56:06,957 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 168 transitions. Word has length 161 [2020-10-28 14:56:06,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:56:06,957 INFO L481 AbstractCegarLoop]: Abstraction has 167 states and 168 transitions. [2020-10-28 14:56:06,957 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-28 14:56:06,957 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 168 transitions. [2020-10-28 14:56:06,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2020-10-28 14:56:06,958 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:56:06,958 INFO L422 BasicCegarLoop]: trace histogram [31, 30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:56:06,958 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-28 14:56:06,959 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:56:06,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:56:06,959 INFO L82 PathProgramCache]: Analyzing trace with hash -714113992, now seen corresponding path program 32 times [2020-10-28 14:56:06,959 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:56:06,959 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2040679393] [2020-10-28 14:56:06,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:56:06,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:56:06,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:56:08,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:56:11,986 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:56:11,986 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 176 [2020-10-28 14:56:11,986 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:56:11,986 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-28 14:56:11,986 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:56:11,987 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:56:11,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-28 14:56:11,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 73 [2020-10-28 14:56:11,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 98 [2020-10-28 14:56:11,987 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:56:12,634 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:56:12,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:56:12,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:56:12,639 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:56:12,639 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:56:12,639 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:56:12,639 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:56:12,639 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:56:12,639 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:56:12,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:56:12,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:56:12,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:56:12,639 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:56:12,671 INFO L134 CoverageAnalysis]: Checked inductivity of 2265 backedges. 0 proven. 1365 refuted. 0 times theorem prover too weak. 900 trivial. 0 not checked. [2020-10-28 14:56:12,671 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2040679393] [2020-10-28 14:56:12,671 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:56:12,671 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-28 14:56:12,671 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554613721] [2020-10-28 14:56:12,671 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-28 14:56:12,672 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:56:12,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-28 14:56:12,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=534, Invalid=726, Unknown=0, NotChecked=0, Total=1260 [2020-10-28 14:56:12,673 INFO L87 Difference]: Start difference. First operand 167 states and 168 transitions. Second operand 36 states. [2020-10-28 14:56:13,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:56:13,045 INFO L93 Difference]: Finished difference Result 277 states and 280 transitions. [2020-10-28 14:56:13,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-28 14:56:13,045 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 166 [2020-10-28 14:56:13,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:56:13,047 INFO L225 Difference]: With dead ends: 277 [2020-10-28 14:56:13,047 INFO L226 Difference]: Without dead ends: 174 [2020-10-28 14:56:13,049 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=544, Invalid=862, Unknown=0, NotChecked=0, Total=1406 [2020-10-28 14:56:13,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2020-10-28 14:56:13,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 172. [2020-10-28 14:56:13,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2020-10-28 14:56:13,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 173 transitions. [2020-10-28 14:56:13,056 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 173 transitions. Word has length 166 [2020-10-28 14:56:13,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:56:13,057 INFO L481 AbstractCegarLoop]: Abstraction has 172 states and 173 transitions. [2020-10-28 14:56:13,057 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-28 14:56:13,057 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 173 transitions. [2020-10-28 14:56:13,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2020-10-28 14:56:13,058 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:56:13,058 INFO L422 BasicCegarLoop]: trace histogram [32, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:56:13,058 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-28 14:56:13,058 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:56:13,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:56:13,059 INFO L82 PathProgramCache]: Analyzing trace with hash -241648079, now seen corresponding path program 33 times [2020-10-28 14:56:13,059 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:56:13,059 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1700545937] [2020-10-28 14:56:13,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:56:13,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:56:13,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:56:13,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:56:18,105 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:56:18,105 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 181 [2020-10-28 14:56:18,105 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:56:18,105 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-28 14:56:18,105 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:56:18,105 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:56:18,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-28 14:56:18,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 75 [2020-10-28 14:56:18,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 101 [2020-10-28 14:56:18,106 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:56:18,820 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:56:18,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:56:18,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:56:18,825 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:56:18,825 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:56:18,825 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:56:18,825 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 14:56:18,825 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:56:18,825 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:56:18,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:56:18,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:56:18,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:56:18,826 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:56:18,847 INFO L134 CoverageAnalysis]: Checked inductivity of 2418 backedges. 0 proven. 1457 refuted. 0 times theorem prover too weak. 961 trivial. 0 not checked. [2020-10-28 14:56:18,847 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1700545937] [2020-10-28 14:56:18,848 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:56:18,848 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-28 14:56:18,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096122864] [2020-10-28 14:56:18,848 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-28 14:56:18,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:56:18,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-28 14:56:18,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=567, Invalid=765, Unknown=0, NotChecked=0, Total=1332 [2020-10-28 14:56:18,849 INFO L87 Difference]: Start difference. First operand 172 states and 173 transitions. Second operand 37 states. [2020-10-28 14:56:19,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:56:19,323 INFO L93 Difference]: Finished difference Result 285 states and 288 transitions. [2020-10-28 14:56:19,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-28 14:56:19,323 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 171 [2020-10-28 14:56:19,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:56:19,325 INFO L225 Difference]: With dead ends: 285 [2020-10-28 14:56:19,325 INFO L226 Difference]: Without dead ends: 179 [2020-10-28 14:56:19,327 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=577, Invalid=905, Unknown=0, NotChecked=0, Total=1482 [2020-10-28 14:56:19,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2020-10-28 14:56:19,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 177. [2020-10-28 14:56:19,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2020-10-28 14:56:19,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 178 transitions. [2020-10-28 14:56:19,334 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 178 transitions. Word has length 171 [2020-10-28 14:56:19,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:56:19,334 INFO L481 AbstractCegarLoop]: Abstraction has 177 states and 178 transitions. [2020-10-28 14:56:19,334 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-28 14:56:19,334 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 178 transitions. [2020-10-28 14:56:19,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2020-10-28 14:56:19,335 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:56:19,335 INFO L422 BasicCegarLoop]: trace histogram [33, 32, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:56:19,335 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-28 14:56:19,336 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:56:19,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:56:19,336 INFO L82 PathProgramCache]: Analyzing trace with hash 1986315420, now seen corresponding path program 34 times [2020-10-28 14:56:19,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:56:19,336 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1988779848] [2020-10-28 14:56:19,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:56:19,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:56:19,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:56:21,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:56:24,359 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:56:24,359 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 186 [2020-10-28 14:56:24,359 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:56:24,359 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-28 14:56:24,359 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:56:24,360 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:56:24,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-28 14:56:24,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 77 [2020-10-28 14:56:24,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 104 [2020-10-28 14:56:24,360 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:56:25,099 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:56:25,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:56:25,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:56:25,104 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:56:25,104 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:56:25,104 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:56:25,104 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:56:25,105 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:56:25,105 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:56:25,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:56:25,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:56:25,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:56:25,105 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:56:25,127 INFO L134 CoverageAnalysis]: Checked inductivity of 2576 backedges. 0 proven. 1552 refuted. 0 times theorem prover too weak. 1024 trivial. 0 not checked. [2020-10-28 14:56:25,127 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1988779848] [2020-10-28 14:56:25,127 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:56:25,128 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-28 14:56:25,128 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271741246] [2020-10-28 14:56:25,128 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-28 14:56:25,128 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:56:25,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-28 14:56:25,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=601, Invalid=805, Unknown=0, NotChecked=0, Total=1406 [2020-10-28 14:56:25,130 INFO L87 Difference]: Start difference. First operand 177 states and 178 transitions. Second operand 38 states. [2020-10-28 14:56:25,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:56:25,594 INFO L93 Difference]: Finished difference Result 293 states and 296 transitions. [2020-10-28 14:56:25,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-28 14:56:25,594 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 176 [2020-10-28 14:56:25,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:56:25,596 INFO L225 Difference]: With dead ends: 293 [2020-10-28 14:56:25,596 INFO L226 Difference]: Without dead ends: 184 [2020-10-28 14:56:25,597 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=611, Invalid=949, Unknown=0, NotChecked=0, Total=1560 [2020-10-28 14:56:25,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2020-10-28 14:56:25,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 182. [2020-10-28 14:56:25,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2020-10-28 14:56:25,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 183 transitions. [2020-10-28 14:56:25,606 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 183 transitions. Word has length 176 [2020-10-28 14:56:25,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:56:25,606 INFO L481 AbstractCegarLoop]: Abstraction has 182 states and 183 transitions. [2020-10-28 14:56:25,606 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-28 14:56:25,606 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 183 transitions. [2020-10-28 14:56:25,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2020-10-28 14:56:25,607 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:56:25,607 INFO L422 BasicCegarLoop]: trace histogram [34, 33, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:56:25,607 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-28 14:56:25,608 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:56:25,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:56:25,608 INFO L82 PathProgramCache]: Analyzing trace with hash 1165602253, now seen corresponding path program 35 times [2020-10-28 14:56:25,608 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:56:25,608 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [193474932] [2020-10-28 14:56:25,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:56:25,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:56:25,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:56:27,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:56:30,664 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:56:30,664 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 191 [2020-10-28 14:56:30,664 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:56:30,664 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5034 [2020-10-28 14:56:30,664 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:56:30,664 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:56:30,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-28 14:56:30,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 79 [2020-10-28 14:56:30,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 107 [2020-10-28 14:56:30,665 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:56:31,445 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:56:31,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:56:31,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:56:31,449 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:56:31,450 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:56:31,450 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:56:31,450 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:56:31,450 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:56:31,450 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:56:31,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:56:31,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:56:31,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:56:31,451 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:56:31,475 INFO L134 CoverageAnalysis]: Checked inductivity of 2739 backedges. 0 proven. 1650 refuted. 0 times theorem prover too weak. 1089 trivial. 0 not checked. [2020-10-28 14:56:31,475 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [193474932] [2020-10-28 14:56:31,476 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:56:31,476 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-28 14:56:31,476 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741966468] [2020-10-28 14:56:31,476 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-28 14:56:31,476 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:56:31,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-28 14:56:31,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=636, Invalid=846, Unknown=0, NotChecked=0, Total=1482 [2020-10-28 14:56:31,477 INFO L87 Difference]: Start difference. First operand 182 states and 183 transitions. Second operand 39 states. [2020-10-28 14:56:31,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:56:31,959 INFO L93 Difference]: Finished difference Result 301 states and 304 transitions. [2020-10-28 14:56:31,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-28 14:56:31,959 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 181 [2020-10-28 14:56:31,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:56:31,960 INFO L225 Difference]: With dead ends: 301 [2020-10-28 14:56:31,961 INFO L226 Difference]: Without dead ends: 189 [2020-10-28 14:56:31,962 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=646, Invalid=994, Unknown=0, NotChecked=0, Total=1640 [2020-10-28 14:56:31,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2020-10-28 14:56:31,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 187. [2020-10-28 14:56:31,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2020-10-28 14:56:31,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 188 transitions. [2020-10-28 14:56:31,970 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 188 transitions. Word has length 181 [2020-10-28 14:56:31,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:56:31,970 INFO L481 AbstractCegarLoop]: Abstraction has 187 states and 188 transitions. [2020-10-28 14:56:31,970 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-28 14:56:31,970 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 188 transitions. [2020-10-28 14:56:31,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2020-10-28 14:56:31,971 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:56:31,972 INFO L422 BasicCegarLoop]: trace histogram [35, 34, 34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:56:31,972 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-28 14:56:31,972 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:56:31,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:56:31,974 INFO L82 PathProgramCache]: Analyzing trace with hash 1981295872, now seen corresponding path program 36 times [2020-10-28 14:56:31,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:56:31,974 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [320821543] [2020-10-28 14:56:31,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:56:32,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:56:32,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:56:32,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:56:37,027 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:56:37,027 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 196 [2020-10-28 14:56:37,027 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:56:37,027 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5023 [2020-10-28 14:56:37,027 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:56:37,028 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:56:37,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-28 14:56:37,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 81 [2020-10-28 14:56:37,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 110 [2020-10-28 14:56:37,028 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:56:37,830 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:56:37,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:56:37,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:56:37,834 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:56:37,834 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:56:37,834 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:56:37,834 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:56:37,835 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:56:37,835 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:56:37,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:56:37,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:56:37,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:56:37,835 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:56:37,859 INFO L134 CoverageAnalysis]: Checked inductivity of 2907 backedges. 0 proven. 1751 refuted. 0 times theorem prover too weak. 1156 trivial. 0 not checked. [2020-10-28 14:56:37,859 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [320821543] [2020-10-28 14:56:37,859 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:56:37,859 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-28 14:56:37,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755442378] [2020-10-28 14:56:37,860 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-28 14:56:37,860 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:56:37,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-28 14:56:37,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=672, Invalid=888, Unknown=0, NotChecked=0, Total=1560 [2020-10-28 14:56:37,861 INFO L87 Difference]: Start difference. First operand 187 states and 188 transitions. Second operand 40 states. [2020-10-28 14:56:38,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:56:38,384 INFO L93 Difference]: Finished difference Result 309 states and 312 transitions. [2020-10-28 14:56:38,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-28 14:56:38,384 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 186 [2020-10-28 14:56:38,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:56:38,386 INFO L225 Difference]: With dead ends: 309 [2020-10-28 14:56:38,386 INFO L226 Difference]: Without dead ends: 194 [2020-10-28 14:56:38,388 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=682, Invalid=1040, Unknown=0, NotChecked=0, Total=1722 [2020-10-28 14:56:38,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2020-10-28 14:56:38,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 192. [2020-10-28 14:56:38,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2020-10-28 14:56:38,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 193 transitions. [2020-10-28 14:56:38,397 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 193 transitions. Word has length 186 [2020-10-28 14:56:38,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:56:38,398 INFO L481 AbstractCegarLoop]: Abstraction has 192 states and 193 transitions. [2020-10-28 14:56:38,398 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-28 14:56:38,398 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 193 transitions. [2020-10-28 14:56:38,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2020-10-28 14:56:38,399 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:56:38,399 INFO L422 BasicCegarLoop]: trace histogram [36, 35, 35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:56:38,400 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-28 14:56:38,400 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:56:38,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:56:38,400 INFO L82 PathProgramCache]: Analyzing trace with hash -1107862167, now seen corresponding path program 37 times [2020-10-28 14:56:38,400 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:56:38,400 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [418331464] [2020-10-28 14:56:38,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:56:38,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:56:38,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:56:41,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:56:43,452 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:56:43,452 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 201 [2020-10-28 14:56:43,458 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:56:43,458 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5022 [2020-10-28 14:56:43,458 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:56:43,459 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:56:43,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-28 14:56:43,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 83 [2020-10-28 14:56:43,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 113 [2020-10-28 14:56:43,459 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:56:44,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:56:44,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:56:44,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:56:44,346 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:56:44,346 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:56:44,347 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:56:44,347 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 14:56:44,347 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:56:44,347 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:56:44,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:56:44,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:56:44,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:56:44,347 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:56:44,372 INFO L134 CoverageAnalysis]: Checked inductivity of 3080 backedges. 0 proven. 1855 refuted. 0 times theorem prover too weak. 1225 trivial. 0 not checked. [2020-10-28 14:56:44,372 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [418331464] [2020-10-28 14:56:44,372 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:56:44,373 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-28 14:56:44,373 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715132586] [2020-10-28 14:56:44,374 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-28 14:56:44,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:56:44,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-28 14:56:44,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=709, Invalid=931, Unknown=0, NotChecked=0, Total=1640 [2020-10-28 14:56:44,375 INFO L87 Difference]: Start difference. First operand 192 states and 193 transitions. Second operand 41 states. [2020-10-28 14:56:44,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:56:44,920 INFO L93 Difference]: Finished difference Result 317 states and 320 transitions. [2020-10-28 14:56:44,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-28 14:56:44,921 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 191 [2020-10-28 14:56:44,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:56:44,923 INFO L225 Difference]: With dead ends: 317 [2020-10-28 14:56:44,923 INFO L226 Difference]: Without dead ends: 199 [2020-10-28 14:56:44,925 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=719, Invalid=1087, Unknown=0, NotChecked=0, Total=1806 [2020-10-28 14:56:44,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2020-10-28 14:56:44,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 197. [2020-10-28 14:56:44,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 197 states. [2020-10-28 14:56:44,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 198 transitions. [2020-10-28 14:56:44,931 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 198 transitions. Word has length 191 [2020-10-28 14:56:44,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:56:44,932 INFO L481 AbstractCegarLoop]: Abstraction has 197 states and 198 transitions. [2020-10-28 14:56:44,932 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-28 14:56:44,932 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 198 transitions. [2020-10-28 14:56:44,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2020-10-28 14:56:44,933 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:56:44,933 INFO L422 BasicCegarLoop]: trace histogram [37, 36, 36, 36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:56:44,933 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-28 14:56:44,933 INFO L429 AbstractCegarLoop]: === Iteration 41 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:56:44,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:56:44,934 INFO L82 PathProgramCache]: Analyzing trace with hash -1011616412, now seen corresponding path program 38 times [2020-10-28 14:56:44,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:56:44,934 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [83163404] [2020-10-28 14:56:44,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:56:44,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:56:44,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:56:47,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:56:50,014 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:56:50,014 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 206 [2020-10-28 14:56:50,014 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:56:50,014 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5051 [2020-10-28 14:56:50,014 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:56:50,014 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:56:50,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-10-28 14:56:50,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 85 [2020-10-28 14:56:50,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 116 [2020-10-28 14:56:50,015 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:56:50,920 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:56:50,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:56:50,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:56:50,925 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:56:50,925 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:56:50,925 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:56:50,925 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 14:56:50,926 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:56:50,926 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:56:50,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:56:50,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:56:50,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:56:50,926 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:56:50,953 INFO L134 CoverageAnalysis]: Checked inductivity of 3258 backedges. 0 proven. 1962 refuted. 0 times theorem prover too weak. 1296 trivial. 0 not checked. [2020-10-28 14:56:50,954 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [83163404] [2020-10-28 14:56:50,954 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:56:50,954 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-10-28 14:56:50,954 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943758654] [2020-10-28 14:56:50,954 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-10-28 14:56:50,954 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:56:50,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-10-28 14:56:50,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=747, Invalid=975, Unknown=0, NotChecked=0, Total=1722 [2020-10-28 14:56:50,955 INFO L87 Difference]: Start difference. First operand 197 states and 198 transitions. Second operand 42 states. [2020-10-28 14:56:51,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:56:51,458 INFO L93 Difference]: Finished difference Result 325 states and 328 transitions. [2020-10-28 14:56:51,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-28 14:56:51,459 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 196 [2020-10-28 14:56:51,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:56:51,461 INFO L225 Difference]: With dead ends: 325 [2020-10-28 14:56:51,461 INFO L226 Difference]: Without dead ends: 204 [2020-10-28 14:56:51,462 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=757, Invalid=1135, Unknown=0, NotChecked=0, Total=1892 [2020-10-28 14:56:51,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2020-10-28 14:56:51,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 202. [2020-10-28 14:56:51,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 202 states. [2020-10-28 14:56:51,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 203 transitions. [2020-10-28 14:56:51,470 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 203 transitions. Word has length 196 [2020-10-28 14:56:51,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:56:51,470 INFO L481 AbstractCegarLoop]: Abstraction has 202 states and 203 transitions. [2020-10-28 14:56:51,470 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-10-28 14:56:51,470 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 203 transitions. [2020-10-28 14:56:51,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2020-10-28 14:56:51,471 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:56:51,471 INFO L422 BasicCegarLoop]: trace histogram [38, 37, 37, 37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:56:51,472 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-28 14:56:51,472 INFO L429 AbstractCegarLoop]: === Iteration 42 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:56:51,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:56:51,472 INFO L82 PathProgramCache]: Analyzing trace with hash 1135054085, now seen corresponding path program 39 times [2020-10-28 14:56:51,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:56:51,472 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1301239185] [2020-10-28 14:56:51,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:56:51,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:56:51,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:56:54,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:56:56,508 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:56:56,508 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 211 [2020-10-28 14:56:56,508 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:56:56,508 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-28 14:56:56,508 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:56:56,508 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:56:56,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 41 [2020-10-28 14:56:56,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 87 [2020-10-28 14:56:56,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 119 [2020-10-28 14:56:56,509 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:56:57,436 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:56:57,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:56:57,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:56:57,441 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:56:57,441 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:56:57,441 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:56:57,441 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:56:57,441 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:56:57,442 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:56:57,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:56:57,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:56:57,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:56:57,442 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:56:57,479 INFO L134 CoverageAnalysis]: Checked inductivity of 3441 backedges. 0 proven. 2072 refuted. 0 times theorem prover too weak. 1369 trivial. 0 not checked. [2020-10-28 14:56:57,479 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1301239185] [2020-10-28 14:56:57,479 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:56:57,479 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-10-28 14:56:57,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854413310] [2020-10-28 14:56:57,480 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-10-28 14:56:57,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:56:57,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-10-28 14:56:57,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=786, Invalid=1020, Unknown=0, NotChecked=0, Total=1806 [2020-10-28 14:56:57,481 INFO L87 Difference]: Start difference. First operand 202 states and 203 transitions. Second operand 43 states. [2020-10-28 14:56:58,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:56:58,047 INFO L93 Difference]: Finished difference Result 333 states and 336 transitions. [2020-10-28 14:56:58,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-28 14:56:58,048 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 201 [2020-10-28 14:56:58,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:56:58,050 INFO L225 Difference]: With dead ends: 333 [2020-10-28 14:56:58,050 INFO L226 Difference]: Without dead ends: 209 [2020-10-28 14:56:58,051 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=796, Invalid=1184, Unknown=0, NotChecked=0, Total=1980 [2020-10-28 14:56:58,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2020-10-28 14:56:58,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 207. [2020-10-28 14:56:58,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 207 states. [2020-10-28 14:56:58,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 208 transitions. [2020-10-28 14:56:58,058 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 208 transitions. Word has length 201 [2020-10-28 14:56:58,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:56:58,058 INFO L481 AbstractCegarLoop]: Abstraction has 207 states and 208 transitions. [2020-10-28 14:56:58,059 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-10-28 14:56:58,059 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 208 transitions. [2020-10-28 14:56:58,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2020-10-28 14:56:58,060 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:56:58,060 INFO L422 BasicCegarLoop]: trace histogram [39, 38, 38, 38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:56:58,060 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-28 14:56:58,060 INFO L429 AbstractCegarLoop]: === Iteration 43 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:56:58,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:56:58,061 INFO L82 PathProgramCache]: Analyzing trace with hash 400711112, now seen corresponding path program 40 times [2020-10-28 14:56:58,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:56:58,061 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1513837065] [2020-10-28 14:56:58,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:56:58,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:56:58,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:01,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:03,097 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:57:03,097 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 216 [2020-10-28 14:57:03,098 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:57:03,098 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-28 14:57:03,098 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:57:03,098 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:57:03,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 42 [2020-10-28 14:57:03,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 89 [2020-10-28 14:57:03,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 122 [2020-10-28 14:57:03,098 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:57:04,130 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:57:04,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:57:04,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:04,136 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:57:04,136 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:57:04,136 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:57:04,136 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:57:04,136 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:57:04,136 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:57:04,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:57:04,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:57:04,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:57:04,137 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:57:04,180 INFO L134 CoverageAnalysis]: Checked inductivity of 3629 backedges. 0 proven. 2185 refuted. 0 times theorem prover too weak. 1444 trivial. 0 not checked. [2020-10-28 14:57:04,180 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1513837065] [2020-10-28 14:57:04,180 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:57:04,180 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-10-28 14:57:04,181 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107505963] [2020-10-28 14:57:04,181 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-10-28 14:57:04,181 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:57:04,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-10-28 14:57:04,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=826, Invalid=1066, Unknown=0, NotChecked=0, Total=1892 [2020-10-28 14:57:04,183 INFO L87 Difference]: Start difference. First operand 207 states and 208 transitions. Second operand 44 states. [2020-10-28 14:57:04,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:57:04,754 INFO L93 Difference]: Finished difference Result 341 states and 344 transitions. [2020-10-28 14:57:04,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-28 14:57:04,754 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 206 [2020-10-28 14:57:04,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:57:04,757 INFO L225 Difference]: With dead ends: 341 [2020-10-28 14:57:04,757 INFO L226 Difference]: Without dead ends: 214 [2020-10-28 14:57:04,759 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=836, Invalid=1234, Unknown=0, NotChecked=0, Total=2070 [2020-10-28 14:57:04,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2020-10-28 14:57:04,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 212. [2020-10-28 14:57:04,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 212 states. [2020-10-28 14:57:04,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 213 transitions. [2020-10-28 14:57:04,766 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 213 transitions. Word has length 206 [2020-10-28 14:57:04,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:57:04,766 INFO L481 AbstractCegarLoop]: Abstraction has 212 states and 213 transitions. [2020-10-28 14:57:04,767 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-10-28 14:57:04,767 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 213 transitions. [2020-10-28 14:57:04,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2020-10-28 14:57:04,768 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:57:04,768 INFO L422 BasicCegarLoop]: trace histogram [40, 39, 39, 39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:57:04,768 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-28 14:57:04,768 INFO L429 AbstractCegarLoop]: === Iteration 44 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:57:04,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:57:04,769 INFO L82 PathProgramCache]: Analyzing trace with hash 60816545, now seen corresponding path program 41 times [2020-10-28 14:57:04,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:57:04,769 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1338226350] [2020-10-28 14:57:04,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:57:04,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:57:04,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:09,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:09,842 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:57:09,842 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 221 [2020-10-28 14:57:09,842 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:57:09,843 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5039 [2020-10-28 14:57:09,843 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:57:09,843 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:57:09,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 43 [2020-10-28 14:57:09,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 91 [2020-10-28 14:57:09,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 125 [2020-10-28 14:57:09,843 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:57:10,868 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:57:10,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:57:10,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:10,872 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:57:10,872 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:57:10,872 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:57:10,872 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:57:10,872 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:57:10,872 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:57:10,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:57:10,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:57:10,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:57:10,873 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:57:10,909 INFO L134 CoverageAnalysis]: Checked inductivity of 3822 backedges. 0 proven. 2301 refuted. 0 times theorem prover too weak. 1521 trivial. 0 not checked. [2020-10-28 14:57:10,910 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1338226350] [2020-10-28 14:57:10,910 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:57:10,910 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2020-10-28 14:57:10,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842551311] [2020-10-28 14:57:10,910 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-10-28 14:57:10,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:57:10,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-10-28 14:57:10,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=867, Invalid=1113, Unknown=0, NotChecked=0, Total=1980 [2020-10-28 14:57:10,911 INFO L87 Difference]: Start difference. First operand 212 states and 213 transitions. Second operand 45 states. [2020-10-28 14:57:11,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:57:11,486 INFO L93 Difference]: Finished difference Result 349 states and 352 transitions. [2020-10-28 14:57:11,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-28 14:57:11,487 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 211 [2020-10-28 14:57:11,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:57:11,488 INFO L225 Difference]: With dead ends: 349 [2020-10-28 14:57:11,489 INFO L226 Difference]: Without dead ends: 219 [2020-10-28 14:57:11,490 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=877, Invalid=1285, Unknown=0, NotChecked=0, Total=2162 [2020-10-28 14:57:11,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2020-10-28 14:57:11,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 217. [2020-10-28 14:57:11,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 217 states. [2020-10-28 14:57:11,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 218 transitions. [2020-10-28 14:57:11,496 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 218 transitions. Word has length 211 [2020-10-28 14:57:11,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:57:11,497 INFO L481 AbstractCegarLoop]: Abstraction has 217 states and 218 transitions. [2020-10-28 14:57:11,497 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-10-28 14:57:11,497 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 218 transitions. [2020-10-28 14:57:11,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2020-10-28 14:57:11,498 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:57:11,498 INFO L422 BasicCegarLoop]: trace histogram [41, 40, 40, 40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:57:11,498 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-28 14:57:11,499 INFO L429 AbstractCegarLoop]: === Iteration 45 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:57:11,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:57:11,499 INFO L82 PathProgramCache]: Analyzing trace with hash -657611220, now seen corresponding path program 42 times [2020-10-28 14:57:11,499 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:57:11,499 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [616222069] [2020-10-28 14:57:11,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:57:11,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:57:11,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:15,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:16,578 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:57:16,579 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 226 [2020-10-28 14:57:16,579 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:57:16,579 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5048 [2020-10-28 14:57:16,579 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:57:16,579 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:57:16,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 44 [2020-10-28 14:57:16,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 93 [2020-10-28 14:57:16,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 128 [2020-10-28 14:57:16,579 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:57:17,688 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:57:17,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:57:17,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:17,692 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:57:17,692 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:57:17,693 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:57:17,693 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:57:17,693 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:57:17,693 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:57:17,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:57:17,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:57:17,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:57:17,693 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:57:17,742 INFO L134 CoverageAnalysis]: Checked inductivity of 4020 backedges. 0 proven. 2420 refuted. 0 times theorem prover too weak. 1600 trivial. 0 not checked. [2020-10-28 14:57:17,742 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [616222069] [2020-10-28 14:57:17,743 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:57:17,743 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2020-10-28 14:57:17,743 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787396862] [2020-10-28 14:57:17,743 INFO L461 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-10-28 14:57:17,743 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:57:17,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-10-28 14:57:17,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=909, Invalid=1161, Unknown=0, NotChecked=0, Total=2070 [2020-10-28 14:57:17,749 INFO L87 Difference]: Start difference. First operand 217 states and 218 transitions. Second operand 46 states. [2020-10-28 14:57:18,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:57:18,391 INFO L93 Difference]: Finished difference Result 357 states and 360 transitions. [2020-10-28 14:57:18,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-28 14:57:18,391 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 216 [2020-10-28 14:57:18,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:57:18,393 INFO L225 Difference]: With dead ends: 357 [2020-10-28 14:57:18,393 INFO L226 Difference]: Without dead ends: 224 [2020-10-28 14:57:18,394 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=919, Invalid=1337, Unknown=0, NotChecked=0, Total=2256 [2020-10-28 14:57:18,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2020-10-28 14:57:18,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 222. [2020-10-28 14:57:18,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 222 states. [2020-10-28 14:57:18,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 223 transitions. [2020-10-28 14:57:18,400 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 223 transitions. Word has length 216 [2020-10-28 14:57:18,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:57:18,400 INFO L481 AbstractCegarLoop]: Abstraction has 222 states and 223 transitions. [2020-10-28 14:57:18,400 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-10-28 14:57:18,400 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 223 transitions. [2020-10-28 14:57:18,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2020-10-28 14:57:18,402 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:57:18,402 INFO L422 BasicCegarLoop]: trace histogram [42, 41, 41, 41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:57:18,402 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-28 14:57:18,402 INFO L429 AbstractCegarLoop]: === Iteration 46 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:57:18,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:57:18,403 INFO L82 PathProgramCache]: Analyzing trace with hash -1955173315, now seen corresponding path program 43 times [2020-10-28 14:57:18,403 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:57:18,403 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [791153169] [2020-10-28 14:57:18,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:57:18,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:57:18,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:18,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:23,459 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:57:23,460 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 231 [2020-10-28 14:57:23,460 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:57:23,460 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5021 [2020-10-28 14:57:23,460 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:57:23,460 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:57:23,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 45 [2020-10-28 14:57:23,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 95 [2020-10-28 14:57:23,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 131 [2020-10-28 14:57:23,460 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:57:24,594 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:57:24,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:57:24,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:24,600 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:57:24,600 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:57:24,600 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:57:24,600 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:57:24,600 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:57:24,600 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:57:24,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:57:24,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:57:24,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:57:24,600 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:57:24,633 INFO L134 CoverageAnalysis]: Checked inductivity of 4223 backedges. 0 proven. 2542 refuted. 0 times theorem prover too weak. 1681 trivial. 0 not checked. [2020-10-28 14:57:24,633 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [791153169] [2020-10-28 14:57:24,633 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:57:24,634 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2020-10-28 14:57:24,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967726925] [2020-10-28 14:57:24,634 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-10-28 14:57:24,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:57:24,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-10-28 14:57:24,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=952, Invalid=1210, Unknown=0, NotChecked=0, Total=2162 [2020-10-28 14:57:24,635 INFO L87 Difference]: Start difference. First operand 222 states and 223 transitions. Second operand 47 states. [2020-10-28 14:57:25,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:57:25,144 INFO L93 Difference]: Finished difference Result 365 states and 368 transitions. [2020-10-28 14:57:25,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-28 14:57:25,145 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 221 [2020-10-28 14:57:25,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:57:25,146 INFO L225 Difference]: With dead ends: 365 [2020-10-28 14:57:25,146 INFO L226 Difference]: Without dead ends: 229 [2020-10-28 14:57:25,147 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=962, Invalid=1390, Unknown=0, NotChecked=0, Total=2352 [2020-10-28 14:57:25,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2020-10-28 14:57:25,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 227. [2020-10-28 14:57:25,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 227 states. [2020-10-28 14:57:25,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 228 transitions. [2020-10-28 14:57:25,154 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 228 transitions. Word has length 221 [2020-10-28 14:57:25,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:57:25,154 INFO L481 AbstractCegarLoop]: Abstraction has 227 states and 228 transitions. [2020-10-28 14:57:25,154 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-10-28 14:57:25,154 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 228 transitions. [2020-10-28 14:57:25,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2020-10-28 14:57:25,156 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:57:25,156 INFO L422 BasicCegarLoop]: trace histogram [43, 42, 42, 42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:57:25,156 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-28 14:57:25,156 INFO L429 AbstractCegarLoop]: === Iteration 47 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:57:25,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:57:25,157 INFO L82 PathProgramCache]: Analyzing trace with hash -31453552, now seen corresponding path program 44 times [2020-10-28 14:57:25,158 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:57:25,158 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [782083878] [2020-10-28 14:57:25,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:57:25,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:57:25,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:29,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:30,256 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:57:30,256 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 236 [2020-10-28 14:57:30,256 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:57:30,256 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5064 [2020-10-28 14:57:30,256 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:57:30,256 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:57:30,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 46 [2020-10-28 14:57:30,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 97 [2020-10-28 14:57:30,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 134 [2020-10-28 14:57:30,257 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:57:31,433 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:57:31,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:57:31,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:31,437 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:57:31,438 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:57:31,438 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:57:31,438 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:57:31,438 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:57:31,438 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:57:31,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:57:31,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:57:31,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:57:31,438 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:57:31,471 INFO L134 CoverageAnalysis]: Checked inductivity of 4431 backedges. 0 proven. 2667 refuted. 0 times theorem prover too weak. 1764 trivial. 0 not checked. [2020-10-28 14:57:31,471 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [782083878] [2020-10-28 14:57:31,471 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:57:31,471 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2020-10-28 14:57:31,471 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12395217] [2020-10-28 14:57:31,472 INFO L461 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-10-28 14:57:31,472 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:57:31,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-10-28 14:57:31,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=996, Invalid=1260, Unknown=0, NotChecked=0, Total=2256 [2020-10-28 14:57:31,472 INFO L87 Difference]: Start difference. First operand 227 states and 228 transitions. Second operand 48 states. [2020-10-28 14:57:31,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:57:31,973 INFO L93 Difference]: Finished difference Result 373 states and 376 transitions. [2020-10-28 14:57:31,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-10-28 14:57:31,973 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 226 [2020-10-28 14:57:31,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:57:31,974 INFO L225 Difference]: With dead ends: 373 [2020-10-28 14:57:31,975 INFO L226 Difference]: Without dead ends: 234 [2020-10-28 14:57:31,975 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1006, Invalid=1444, Unknown=0, NotChecked=0, Total=2450 [2020-10-28 14:57:31,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2020-10-28 14:57:31,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 232. [2020-10-28 14:57:31,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 232 states. [2020-10-28 14:57:31,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 233 transitions. [2020-10-28 14:57:31,982 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 233 transitions. Word has length 226 [2020-10-28 14:57:31,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:57:31,982 INFO L481 AbstractCegarLoop]: Abstraction has 232 states and 233 transitions. [2020-10-28 14:57:31,982 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-10-28 14:57:31,982 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 233 transitions. [2020-10-28 14:57:31,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2020-10-28 14:57:31,984 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:57:31,984 INFO L422 BasicCegarLoop]: trace histogram [44, 43, 43, 43, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:57:31,984 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-28 14:57:31,984 INFO L429 AbstractCegarLoop]: === Iteration 48 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:57:31,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:57:31,985 INFO L82 PathProgramCache]: Analyzing trace with hash -448750631, now seen corresponding path program 45 times [2020-10-28 14:57:31,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:57:31,985 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1180711015] [2020-10-28 14:57:31,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:57:32,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:57:32,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:37,109 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:57:37,109 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 241 [2020-10-28 14:57:37,109 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:57:37,109 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5088 [2020-10-28 14:57:37,109 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:57:37,109 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:57:37,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 45 [2020-10-28 14:57:37,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:57:37,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 88 [2020-10-28 14:57:37,109 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:57:38,292 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:57:38,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:57:38,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:38,297 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:57:38,297 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:57:38,297 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:57:38,298 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:57:38,298 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:57:38,298 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:57:38,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:57:38,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:57:38,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:57:38,298 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:57:38,327 INFO L134 CoverageAnalysis]: Checked inductivity of 4644 backedges. 0 proven. 1849 refuted. 0 times theorem prover too weak. 2795 trivial. 0 not checked. [2020-10-28 14:57:38,327 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1180711015] [2020-10-28 14:57:38,327 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:57:38,327 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2020-10-28 14:57:38,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58992261] [2020-10-28 14:57:38,328 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-10-28 14:57:38,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:57:38,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-10-28 14:57:38,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1037, Invalid=1125, Unknown=0, NotChecked=0, Total=2162 [2020-10-28 14:57:38,328 INFO L87 Difference]: Start difference. First operand 232 states and 233 transitions. Second operand 47 states. [2020-10-28 14:57:38,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:57:38,741 INFO L93 Difference]: Finished difference Result 379 states and 382 transitions. [2020-10-28 14:57:38,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-28 14:57:38,742 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 231 [2020-10-28 14:57:38,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:57:38,744 INFO L225 Difference]: With dead ends: 379 [2020-10-28 14:57:38,744 INFO L226 Difference]: Without dead ends: 240 [2020-10-28 14:57:38,745 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1037, Invalid=1125, Unknown=0, NotChecked=0, Total=2162 [2020-10-28 14:57:38,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2020-10-28 14:57:38,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 234. [2020-10-28 14:57:38,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 234 states. [2020-10-28 14:57:38,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 235 transitions. [2020-10-28 14:57:38,756 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 235 transitions. Word has length 231 [2020-10-28 14:57:38,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:57:38,757 INFO L481 AbstractCegarLoop]: Abstraction has 234 states and 235 transitions. [2020-10-28 14:57:38,757 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-10-28 14:57:38,757 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 235 transitions. [2020-10-28 14:57:38,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2020-10-28 14:57:38,758 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:57:38,758 INFO L422 BasicCegarLoop]: trace histogram [44, 44, 44, 43, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:57:38,758 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-28 14:57:38,759 INFO L429 AbstractCegarLoop]: === Iteration 49 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:57:38,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:57:38,759 INFO L82 PathProgramCache]: Analyzing trace with hash -1275466441, now seen corresponding path program 46 times [2020-10-28 14:57:38,759 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:57:38,759 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [776362115] [2020-10-28 14:57:38,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:57:38,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:57:38,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:38,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:43,861 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:57:43,861 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 243 [2020-10-28 14:57:43,861 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:57:43,861 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5069 [2020-10-28 14:57:43,862 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:57:43,862 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:57:43,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 47 [2020-10-28 14:57:43,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 101 [2020-10-28 14:57:43,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 137 [2020-10-28 14:57:43,862 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:57:45,113 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:57:45,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:57:45,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:45,118 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:57:45,118 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:57:45,118 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:57:45,118 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 14:57:45,118 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:57:45,118 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:57:45,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:57:45,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:57:45,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:57:45,119 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:57:45,153 INFO L134 CoverageAnalysis]: Checked inductivity of 4731 backedges. 0 proven. 2795 refuted. 0 times theorem prover too weak. 1936 trivial. 0 not checked. [2020-10-28 14:57:45,153 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [776362115] [2020-10-28 14:57:45,153 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:57:45,153 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2020-10-28 14:57:45,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529292980] [2020-10-28 14:57:45,153 INFO L461 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-10-28 14:57:45,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:57:45,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-10-28 14:57:45,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1041, Invalid=1311, Unknown=0, NotChecked=0, Total=2352 [2020-10-28 14:57:45,155 INFO L87 Difference]: Start difference. First operand 234 states and 235 transitions. Second operand 49 states. [2020-10-28 14:57:45,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:57:45,695 INFO L93 Difference]: Finished difference Result 246 states and 247 transitions. [2020-10-28 14:57:45,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-10-28 14:57:45,696 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 233 [2020-10-28 14:57:45,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:57:45,700 INFO L225 Difference]: With dead ends: 246 [2020-10-28 14:57:45,700 INFO L226 Difference]: Without dead ends: 239 [2020-10-28 14:57:45,701 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1051, Invalid=1499, Unknown=0, NotChecked=0, Total=2550 [2020-10-28 14:57:45,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2020-10-28 14:57:45,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 237. [2020-10-28 14:57:45,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 237 states. [2020-10-28 14:57:45,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 238 transitions. [2020-10-28 14:57:45,709 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 238 transitions. Word has length 233 [2020-10-28 14:57:45,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:57:45,710 INFO L481 AbstractCegarLoop]: Abstraction has 237 states and 238 transitions. [2020-10-28 14:57:45,710 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-10-28 14:57:45,710 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 238 transitions. [2020-10-28 14:57:45,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2020-10-28 14:57:45,711 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:57:45,712 INFO L422 BasicCegarLoop]: trace histogram [45, 44, 44, 44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:57:45,712 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-10-28 14:57:45,712 INFO L429 AbstractCegarLoop]: === Iteration 50 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:57:45,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:57:45,712 INFO L82 PathProgramCache]: Analyzing trace with hash -184297740, now seen corresponding path program 47 times [2020-10-28 14:57:45,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:57:45,713 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1141862487] [2020-10-28 14:57:45,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:57:45,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:57:45,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:50,839 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:57:50,839 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 246 [2020-10-28 14:57:50,839 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:57:50,839 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5088 [2020-10-28 14:57:50,839 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:57:50,839 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:57:50,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 46 [2020-10-28 14:57:50,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:57:50,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 90 [2020-10-28 14:57:50,840 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:57:52,065 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:57:52,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:57:52,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:52,070 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:57:52,070 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:57:52,070 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:57:52,070 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:57:52,070 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:57:52,070 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:57:52,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:57:52,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:57:52,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:57:52,071 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:57:52,109 INFO L134 CoverageAnalysis]: Checked inductivity of 4862 backedges. 0 proven. 1936 refuted. 0 times theorem prover too weak. 2926 trivial. 0 not checked. [2020-10-28 14:57:52,109 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1141862487] [2020-10-28 14:57:52,109 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:57:52,109 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2020-10-28 14:57:52,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145248664] [2020-10-28 14:57:52,110 INFO L461 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-10-28 14:57:52,110 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:57:52,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-10-28 14:57:52,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1083, Invalid=1173, Unknown=0, NotChecked=0, Total=2256 [2020-10-28 14:57:52,111 INFO L87 Difference]: Start difference. First operand 237 states and 238 transitions. Second operand 48 states. [2020-10-28 14:57:52,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:57:52,670 INFO L93 Difference]: Finished difference Result 387 states and 390 transitions. [2020-10-28 14:57:52,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-10-28 14:57:52,671 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 236 [2020-10-28 14:57:52,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:57:52,673 INFO L225 Difference]: With dead ends: 387 [2020-10-28 14:57:52,673 INFO L226 Difference]: Without dead ends: 245 [2020-10-28 14:57:52,674 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1083, Invalid=1173, Unknown=0, NotChecked=0, Total=2256 [2020-10-28 14:57:52,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2020-10-28 14:57:52,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 239. [2020-10-28 14:57:52,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 239 states. [2020-10-28 14:57:52,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 240 transitions. [2020-10-28 14:57:52,680 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 240 transitions. Word has length 236 [2020-10-28 14:57:52,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:57:52,681 INFO L481 AbstractCegarLoop]: Abstraction has 239 states and 240 transitions. [2020-10-28 14:57:52,681 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-10-28 14:57:52,681 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 240 transitions. [2020-10-28 14:57:52,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2020-10-28 14:57:52,682 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:57:52,682 INFO L422 BasicCegarLoop]: trace histogram [45, 45, 45, 44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:57:52,682 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-10-28 14:57:52,683 INFO L429 AbstractCegarLoop]: === Iteration 51 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:57:52,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:57:52,683 INFO L82 PathProgramCache]: Analyzing trace with hash 1255977046, now seen corresponding path program 48 times [2020-10-28 14:57:52,683 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:57:52,683 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1669744580] [2020-10-28 14:57:52,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:57:52,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:57:52,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking...