/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/array-examples/standard_init7_ground-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 09:02:33,005 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 09:02:33,007 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 09:02:33,044 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 09:02:33,045 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 09:02:33,047 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 09:02:33,049 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 09:02:33,051 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 09:02:33,053 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 09:02:33,055 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 09:02:33,056 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 09:02:33,058 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 09:02:33,059 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 09:02:33,060 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 09:02:33,062 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 09:02:33,063 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 09:02:33,065 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 09:02:33,066 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 09:02:33,068 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 09:02:33,071 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 09:02:33,073 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 09:02:33,078 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 09:02:33,080 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 09:02:33,081 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 09:02:33,091 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 09:02:33,092 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 09:02:33,092 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 09:02:33,096 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 09:02:33,096 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 09:02:33,101 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 09:02:33,101 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 09:02:33,103 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 09:02:33,104 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 09:02:33,105 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 09:02:33,107 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 09:02:33,108 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 09:02:33,124 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 09:02:33,124 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 09:02:33,124 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 09:02:33,126 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 09:02:33,127 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 09:02:33,128 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 09:02:33,189 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 09:02:33,189 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 09:02:33,190 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 09:02:33,191 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 09:02:33,191 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 09:02:33,191 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 09:02:33,191 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 09:02:33,192 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 09:02:33,192 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 09:02:33,193 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 09:02:33,194 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 09:02:33,194 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 09:02:33,195 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 09:02:33,195 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 09:02:33,195 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 09:02:33,195 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 09:02:33,195 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 09:02:33,196 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 09:02:33,196 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 09:02:33,196 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 09:02:33,197 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 09:02:33,197 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 09:02:33,197 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 09:02:33,197 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 09:02:33,198 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 09:02:33,198 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 09:02:33,198 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 09:02:33,198 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 09:02:33,198 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 09:02:33,199 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 09:02:33,632 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 09:02:33,676 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 09:02:33,680 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 09:02:33,681 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 09:02:33,682 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 09:02:33,683 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_init7_ground-2.i [2020-10-28 09:02:33,774 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7f4eba700/1973e7a48aa94e7bab6e6b3624d078ac/FLAGe9c92d4ac [2020-10-28 09:02:34,429 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 09:02:34,431 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-examples/standard_init7_ground-2.i [2020-10-28 09:02:34,447 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7f4eba700/1973e7a48aa94e7bab6e6b3624d078ac/FLAGe9c92d4ac [2020-10-28 09:02:34,789 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7f4eba700/1973e7a48aa94e7bab6e6b3624d078ac [2020-10-28 09:02:34,792 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 09:02:34,799 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 09:02:34,801 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 09:02:34,801 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 09:02:34,806 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 09:02:34,806 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 09:02:34" (1/1) ... [2020-10-28 09:02:34,810 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3644088a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:02:34, skipping insertion in model container [2020-10-28 09:02:34,811 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 09:02:34" (1/1) ... [2020-10-28 09:02:34,819 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 09:02:34,836 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 09:02:35,002 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 09:02:35,012 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 09:02:35,037 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 09:02:35,055 INFO L208 MainTranslator]: Completed translation [2020-10-28 09:02:35,056 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:02:35 WrapperNode [2020-10-28 09:02:35,056 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 09:02:35,057 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 09:02:35,057 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 09:02:35,058 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 09:02:35,072 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:02:35" (1/1) ... [2020-10-28 09:02:35,072 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:02:35" (1/1) ... [2020-10-28 09:02:35,081 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:02:35" (1/1) ... [2020-10-28 09:02:35,082 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:02:35" (1/1) ... [2020-10-28 09:02:35,090 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:02:35" (1/1) ... [2020-10-28 09:02:35,098 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:02:35" (1/1) ... [2020-10-28 09:02:35,102 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:02:35" (1/1) ... [2020-10-28 09:02:35,108 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 09:02:35,111 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 09:02:35,111 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 09:02:35,111 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 09:02:35,113 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:02:35" (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 09:02:35,213 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 09:02:35,214 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 09:02:35,214 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 09:02:35,215 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-28 09:02:35,215 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 09:02:35,216 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 09:02:35,216 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 09:02:35,216 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-28 09:02:35,217 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-28 09:02:35,217 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 09:02:35,218 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 09:02:35,219 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-28 09:02:35,219 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 09:02:35,220 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 09:02:35,220 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 09:02:35,221 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 09:02:35,221 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 09:02:35,222 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 09:02:35,222 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 09:02:35,782 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 09:02:35,782 INFO L298 CfgBuilder]: Removed 8 assume(true) statements. [2020-10-28 09:02:35,784 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 09:02:35 BoogieIcfgContainer [2020-10-28 09:02:35,785 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 09:02:35,787 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 09:02:35,787 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 09:02:35,790 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 09:02:35,791 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 09:02:34" (1/3) ... [2020-10-28 09:02:35,792 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f6ce191 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 09:02:35, skipping insertion in model container [2020-10-28 09:02:35,792 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:02:35" (2/3) ... [2020-10-28 09:02:35,792 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f6ce191 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 09:02:35, skipping insertion in model container [2020-10-28 09:02:35,793 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 09:02:35" (3/3) ... [2020-10-28 09:02:35,794 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_init7_ground-2.i [2020-10-28 09:02:35,807 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 09:02:35,814 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 09:02:35,831 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 09:02:35,863 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 09:02:35,863 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 09:02:35,863 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 09:02:35,863 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 09:02:35,863 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 09:02:35,864 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 09:02:35,864 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 09:02:35,864 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 09:02:35,884 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states. [2020-10-28 09:02:35,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-28 09:02:35,892 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:02:35,893 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:02:35,893 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:02:35,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:02:35,901 INFO L82 PathProgramCache]: Analyzing trace with hash 1254713614, now seen corresponding path program 1 times [2020-10-28 09:02:35,911 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:02:35,912 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1852346899] [2020-10-28 09:02:35,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:02:36,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:02:36,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:36,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:36,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:36,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:36,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:36,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:36,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:38,071 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:02:38,071 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-28 09:02:38,072 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 09:02:38,072 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1993 [2020-10-28 09:02:38,076 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:02:38,077 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:02:38,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:02:38,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-28 09:02:38,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:02:38,079 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-10-28 09:02:38,206 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:02:38,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:02:38,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:38,230 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:02:38,231 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:02:38,234 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:02:38,234 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-28 09:02:38,235 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:02:38,235 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:02:38,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:02:38,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:02:38,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:02:38,236 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:02:38,246 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 09:02:38,247 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1852346899] [2020-10-28 09:02:38,249 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 09:02:38,250 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-28 09:02:38,251 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846529298] [2020-10-28 09:02:38,256 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-28 09:02:38,257 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:02:38,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-28 09:02:38,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-28 09:02:38,277 INFO L87 Difference]: Start difference. First operand 40 states. Second operand 3 states. [2020-10-28 09:02:38,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:02:38,453 INFO L93 Difference]: Finished difference Result 70 states and 104 transitions. [2020-10-28 09:02:38,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-28 09:02:38,456 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-10-28 09:02:38,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:02:38,464 INFO L225 Difference]: With dead ends: 70 [2020-10-28 09:02:38,464 INFO L226 Difference]: Without dead ends: 32 [2020-10-28 09:02:38,468 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 09:02:38,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-10-28 09:02:38,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2020-10-28 09:02:38,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-28 09:02:38,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions. [2020-10-28 09:02:38,514 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 27 [2020-10-28 09:02:38,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:02:38,515 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 39 transitions. [2020-10-28 09:02:38,515 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-28 09:02:38,515 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions. [2020-10-28 09:02:38,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-28 09:02:38,516 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:02:38,516 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:02:38,517 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 09:02:38,517 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:02:38,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:02:38,518 INFO L82 PathProgramCache]: Analyzing trace with hash -1022482938, now seen corresponding path program 1 times [2020-10-28 09:02:38,518 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:02:38,519 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [954985144] [2020-10-28 09:02:38,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:02:38,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:02:38,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:38,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:38,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:38,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:38,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:38,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:38,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:40,770 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:02:40,770 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-28 09:02:40,771 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 09:02:40,771 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2236 [2020-10-28 09:02:40,771 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:02:40,771 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:02:40,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 09:02:40,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-28 09:02:40,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 09:02:40,772 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:02:40,825 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:02:40,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:02:40,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:40,834 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:02:40,835 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:02:40,835 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:02:40,835 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 09:02:40,835 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:02:40,836 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:02:40,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:02:40,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:02:40,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:02:40,837 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:02:40,844 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 09:02:40,845 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [954985144] [2020-10-28 09:02:40,846 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 09:02:40,846 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 09:02:40,846 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528906482] [2020-10-28 09:02:40,848 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 09:02:40,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:02:40,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 09:02:40,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 09:02:40,850 INFO L87 Difference]: Start difference. First operand 32 states and 39 transitions. Second operand 4 states. [2020-10-28 09:02:41,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:02:41,000 INFO L93 Difference]: Finished difference Result 64 states and 84 transitions. [2020-10-28 09:02:41,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 09:02:41,001 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2020-10-28 09:02:41,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:02:41,002 INFO L225 Difference]: With dead ends: 64 [2020-10-28 09:02:41,003 INFO L226 Difference]: Without dead ends: 39 [2020-10-28 09:02:41,004 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 09:02:41,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-28 09:02:41,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-10-28 09:02:41,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-28 09:02:41,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 46 transitions. [2020-10-28 09:02:41,016 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 46 transitions. Word has length 27 [2020-10-28 09:02:41,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:02:41,016 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 46 transitions. [2020-10-28 09:02:41,016 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 09:02:41,017 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 46 transitions. [2020-10-28 09:02:41,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-28 09:02:41,018 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:02:41,018 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:02:41,018 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 09:02:41,019 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:02:41,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:02:41,020 INFO L82 PathProgramCache]: Analyzing trace with hash 2123827569, now seen corresponding path program 1 times [2020-10-28 09:02:41,020 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:02:41,020 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [347494628] [2020-10-28 09:02:41,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:02:41,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:02:41,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:41,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:41,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:41,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:41,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:41,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:41,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:46,045 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:02:46,046 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-28 09:02:46,046 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 09:02:46,046 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-28 09:02:46,046 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:02:46,047 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:02:46,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 09:02:46,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-28 09:02:46,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-28 09:02:46,047 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:02:46,103 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:02:46,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:02:46,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:46,111 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:02:46,111 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:02:46,111 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:02:46,112 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 09:02:46,112 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:02:46,112 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:02:46,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:02:46,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:02:46,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:02:46,113 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:02:46,118 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-28 09:02:46,119 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [347494628] [2020-10-28 09:02:46,119 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:02:46,119 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 09:02:46,119 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123208514] [2020-10-28 09:02:46,120 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 09:02:46,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:02:46,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 09:02:46,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 09:02:46,122 INFO L87 Difference]: Start difference. First operand 39 states and 46 transitions. Second operand 5 states. [2020-10-28 09:02:46,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:02:46,298 INFO L93 Difference]: Finished difference Result 77 states and 97 transitions. [2020-10-28 09:02:46,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 09:02:46,299 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 34 [2020-10-28 09:02:46,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:02:46,300 INFO L225 Difference]: With dead ends: 77 [2020-10-28 09:02:46,301 INFO L226 Difference]: Without dead ends: 46 [2020-10-28 09:02:46,302 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 09:02:46,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-28 09:02:46,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2020-10-28 09:02:46,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-28 09:02:46,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 53 transitions. [2020-10-28 09:02:46,312 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 53 transitions. Word has length 34 [2020-10-28 09:02:46,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:02:46,312 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 53 transitions. [2020-10-28 09:02:46,312 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 09:02:46,313 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 53 transitions. [2020-10-28 09:02:46,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-28 09:02:46,314 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:02:46,314 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:02:46,314 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 09:02:46,315 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:02:46,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:02:46,316 INFO L82 PathProgramCache]: Analyzing trace with hash -1509369946, now seen corresponding path program 2 times [2020-10-28 09:02:46,316 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:02:46,316 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1418043745] [2020-10-28 09:02:46,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:02:46,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:02:46,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:46,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:46,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:46,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:46,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:46,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:49,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:51,347 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:02:51,348 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-28 09:02:51,349 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 09:02:51,349 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-28 09:02:51,349 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:02:51,350 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:02:51,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 09:02:51,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-28 09:02:51,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-28 09:02:51,358 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 9 [2020-10-28 09:02:51,455 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:02:51,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:02:51,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:51,463 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:02:51,464 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:02:51,464 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:02:51,464 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 09:02:51,465 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:02:51,465 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:02:51,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:02:51,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:02:51,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:02:51,466 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:02:51,473 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-10-28 09:02:51,473 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1418043745] [2020-10-28 09:02:51,474 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:02:51,474 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 09:02:51,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486975364] [2020-10-28 09:02:51,476 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 09:02:51,477 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:02:51,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 09:02:51,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-28 09:02:51,480 INFO L87 Difference]: Start difference. First operand 46 states and 53 transitions. Second operand 6 states. [2020-10-28 09:02:51,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:02:51,697 INFO L93 Difference]: Finished difference Result 90 states and 110 transitions. [2020-10-28 09:02:51,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 09:02:51,698 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 41 [2020-10-28 09:02:51,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:02:51,699 INFO L225 Difference]: With dead ends: 90 [2020-10-28 09:02:51,699 INFO L226 Difference]: Without dead ends: 53 [2020-10-28 09:02:51,700 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 09:02:51,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-28 09:02:51,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2020-10-28 09:02:51,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-28 09:02:51,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 60 transitions. [2020-10-28 09:02:51,709 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 60 transitions. Word has length 41 [2020-10-28 09:02:51,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:02:51,709 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 60 transitions. [2020-10-28 09:02:51,709 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 09:02:51,710 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 60 transitions. [2020-10-28 09:02:51,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-28 09:02:51,711 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:02:51,711 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:02:51,711 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 09:02:51,712 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:02:51,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:02:51,712 INFO L82 PathProgramCache]: Analyzing trace with hash 2004918481, now seen corresponding path program 3 times [2020-10-28 09:02:51,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:02:51,713 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1141290893] [2020-10-28 09:02:51,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:02:51,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:02:51,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:51,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:51,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:51,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:51,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:52,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:56,745 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:02:56,746 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-28 09:02:56,746 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 09:02:56,746 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-28 09:02:56,747 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:02:56,747 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:02:56,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 09:02:56,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:02:56,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-28 09:02:56,747 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:02:56,829 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:02:56,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:02:56,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:56,837 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:02:56,838 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:02:56,838 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:02:56,838 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:02:56,838 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:02:56,839 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:02:56,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:02:56,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:02:56,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:02:56,839 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:02:56,846 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-28 09:02:56,847 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1141290893] [2020-10-28 09:02:56,847 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:02:56,847 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 09:02:56,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445965867] [2020-10-28 09:02:56,848 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 09:02:56,849 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:02:56,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 09:02:56,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-28 09:02:56,861 INFO L87 Difference]: Start difference. First operand 53 states and 60 transitions. Second operand 7 states. [2020-10-28 09:02:57,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:02:57,098 INFO L93 Difference]: Finished difference Result 103 states and 123 transitions. [2020-10-28 09:02:57,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 09:02:57,099 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 48 [2020-10-28 09:02:57,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:02:57,102 INFO L225 Difference]: With dead ends: 103 [2020-10-28 09:02:57,102 INFO L226 Difference]: Without dead ends: 60 [2020-10-28 09:02:57,104 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-28 09:02:57,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-28 09:02:57,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2020-10-28 09:02:57,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-28 09:02:57,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 67 transitions. [2020-10-28 09:02:57,119 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 67 transitions. Word has length 48 [2020-10-28 09:02:57,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:02:57,120 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 67 transitions. [2020-10-28 09:02:57,120 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 09:02:57,120 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 67 transitions. [2020-10-28 09:02:57,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-28 09:02:57,125 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:02:57,125 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:02:57,126 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 09:02:57,126 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:02:57,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:02:57,128 INFO L82 PathProgramCache]: Analyzing trace with hash -1774816954, now seen corresponding path program 4 times [2020-10-28 09:02:57,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:02:57,134 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [926882934] [2020-10-28 09:02:57,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:02:57,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:02:57,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:57,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:57,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:57,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:57,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:57,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:02,167 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:03:02,168 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-28 09:03:02,168 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 09:03:02,168 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-28 09:03:02,169 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:03:02,169 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:03:02,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 09:03:02,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 35 [2020-10-28 09:03:02,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 09:03:02,170 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:03:02,281 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:03:02,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:03:02,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:02,288 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:03:02,289 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:03:02,289 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:03:02,289 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 09:03:02,289 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:03:02,289 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:03:02,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:03:02,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:03:02,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:03:02,290 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:03:02,305 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2020-10-28 09:03:02,305 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [926882934] [2020-10-28 09:03:02,306 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:03:02,307 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 09:03:02,307 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878615846] [2020-10-28 09:03:02,307 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 09:03:02,308 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:03:02,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 09:03:02,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-28 09:03:02,309 INFO L87 Difference]: Start difference. First operand 60 states and 67 transitions. Second operand 8 states. [2020-10-28 09:03:02,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:03:02,582 INFO L93 Difference]: Finished difference Result 116 states and 136 transitions. [2020-10-28 09:03:02,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 09:03:02,584 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 55 [2020-10-28 09:03:02,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:03:02,586 INFO L225 Difference]: With dead ends: 116 [2020-10-28 09:03:02,587 INFO L226 Difference]: Without dead ends: 67 [2020-10-28 09:03:02,588 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-28 09:03:02,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-28 09:03:02,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2020-10-28 09:03:02,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-28 09:03:02,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 74 transitions. [2020-10-28 09:03:02,607 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 74 transitions. Word has length 55 [2020-10-28 09:03:02,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:03:02,608 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 74 transitions. [2020-10-28 09:03:02,608 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 09:03:02,610 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 74 transitions. [2020-10-28 09:03:02,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-28 09:03:02,611 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:03:02,613 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:03:02,613 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 09:03:02,614 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:03:02,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:03:02,615 INFO L82 PathProgramCache]: Analyzing trace with hash -1332096975, now seen corresponding path program 5 times [2020-10-28 09:03:02,615 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:03:02,615 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1073177068] [2020-10-28 09:03:02,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:03:02,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:03:02,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:02,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:02,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:02,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:02,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:03,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:07,649 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:03:07,649 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-28 09:03:07,650 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 09:03:07,650 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-28 09:03:07,650 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:03:07,650 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:03:07,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 09:03:07,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-28 09:03:07,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-28 09:03:07,651 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:03:07,768 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:03:07,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:03:07,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:07,774 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:03:07,774 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:03:07,774 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:03:07,774 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:03:07,774 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:03:07,775 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:03:07,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:03:07,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:03:07,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:03:07,775 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:03:07,783 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2020-10-28 09:03:07,784 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1073177068] [2020-10-28 09:03:07,784 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:03:07,784 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-28 09:03:07,784 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155335166] [2020-10-28 09:03:07,785 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 09:03:07,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:03:07,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 09:03:07,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-28 09:03:07,786 INFO L87 Difference]: Start difference. First operand 67 states and 74 transitions. Second operand 9 states. [2020-10-28 09:03:08,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:03:08,040 INFO L93 Difference]: Finished difference Result 129 states and 149 transitions. [2020-10-28 09:03:08,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 09:03:08,040 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 62 [2020-10-28 09:03:08,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:03:08,042 INFO L225 Difference]: With dead ends: 129 [2020-10-28 09:03:08,042 INFO L226 Difference]: Without dead ends: 74 [2020-10-28 09:03:08,043 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-28 09:03:08,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-28 09:03:08,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2020-10-28 09:03:08,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-28 09:03:08,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 81 transitions. [2020-10-28 09:03:08,055 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 81 transitions. Word has length 62 [2020-10-28 09:03:08,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:03:08,055 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 81 transitions. [2020-10-28 09:03:08,055 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 09:03:08,055 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 81 transitions. [2020-10-28 09:03:08,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-28 09:03:08,056 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:03:08,057 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:03:08,057 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 09:03:08,057 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:03:08,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:03:08,058 INFO L82 PathProgramCache]: Analyzing trace with hash -1930890522, now seen corresponding path program 6 times [2020-10-28 09:03:08,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:03:08,058 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1379343839] [2020-10-28 09:03:08,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:03:08,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:03:08,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:08,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:08,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:08,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:08,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:09,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:13,082 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:03:13,083 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-28 09:03:13,083 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 09:03:13,083 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-28 09:03:13,083 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:03:13,083 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:03:13,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 09:03:13,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-28 09:03:13,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-28 09:03:13,084 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:03:13,199 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:03:13,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:03:13,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:13,205 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:03:13,205 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:03:13,205 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:03:13,206 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:03:13,206 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:03:13,206 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:03:13,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:03:13,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:03:13,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:03:13,207 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:03:13,214 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2020-10-28 09:03:13,214 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1379343839] [2020-10-28 09:03:13,214 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:03:13,215 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 09:03:13,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581372233] [2020-10-28 09:03:13,215 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 09:03:13,216 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:03:13,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 09:03:13,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-28 09:03:13,217 INFO L87 Difference]: Start difference. First operand 74 states and 81 transitions. Second operand 10 states. [2020-10-28 09:03:13,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:03:13,495 INFO L93 Difference]: Finished difference Result 142 states and 162 transitions. [2020-10-28 09:03:13,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 09:03:13,496 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 69 [2020-10-28 09:03:13,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:03:13,496 INFO L225 Difference]: With dead ends: 142 [2020-10-28 09:03:13,497 INFO L226 Difference]: Without dead ends: 81 [2020-10-28 09:03:13,498 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-28 09:03:13,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-28 09:03:13,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2020-10-28 09:03:13,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-28 09:03:13,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 88 transitions. [2020-10-28 09:03:13,510 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 88 transitions. Word has length 69 [2020-10-28 09:03:13,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:03:13,510 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 88 transitions. [2020-10-28 09:03:13,510 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 09:03:13,510 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 88 transitions. [2020-10-28 09:03:13,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-28 09:03:13,511 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:03:13,511 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:03:13,512 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 09:03:13,512 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:03:13,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:03:13,512 INFO L82 PathProgramCache]: Analyzing trace with hash -154101871, now seen corresponding path program 7 times [2020-10-28 09:03:13,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:03:13,513 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1233374203] [2020-10-28 09:03:13,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:03:13,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:03:13,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:13,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:13,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:13,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:13,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:14,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:18,543 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:03:18,543 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-28 09:03:18,544 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 09:03:18,544 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-28 09:03:18,544 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:03:18,544 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:03:18,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 09:03:18,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-28 09:03:18,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-28 09:03:18,545 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:03:18,700 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:03:18,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:03:18,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:18,705 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:03:18,705 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:03:18,705 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:03:18,705 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:03:18,706 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:03:18,706 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:03:18,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:03:18,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:03:18,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:03:18,706 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:03:18,714 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2020-10-28 09:03:18,715 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1233374203] [2020-10-28 09:03:18,715 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:03:18,715 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-28 09:03:18,716 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545700175] [2020-10-28 09:03:18,716 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 09:03:18,716 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:03:18,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 09:03:18,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-28 09:03:18,717 INFO L87 Difference]: Start difference. First operand 81 states and 88 transitions. Second operand 11 states. [2020-10-28 09:03:19,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:03:19,037 INFO L93 Difference]: Finished difference Result 155 states and 175 transitions. [2020-10-28 09:03:19,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 09:03:19,038 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 76 [2020-10-28 09:03:19,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:03:19,039 INFO L225 Difference]: With dead ends: 155 [2020-10-28 09:03:19,040 INFO L226 Difference]: Without dead ends: 88 [2020-10-28 09:03:19,041 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-28 09:03:19,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-28 09:03:19,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2020-10-28 09:03:19,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-28 09:03:19,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 95 transitions. [2020-10-28 09:03:19,057 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 95 transitions. Word has length 76 [2020-10-28 09:03:19,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:03:19,058 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 95 transitions. [2020-10-28 09:03:19,058 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 09:03:19,058 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 95 transitions. [2020-10-28 09:03:19,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-28 09:03:19,060 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:03:19,060 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:03:19,060 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 09:03:19,060 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:03:19,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:03:19,061 INFO L82 PathProgramCache]: Analyzing trace with hash -705536890, now seen corresponding path program 8 times [2020-10-28 09:03:19,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:03:19,061 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1613279668] [2020-10-28 09:03:19,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:03:19,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:03:19,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:19,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:19,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:19,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:19,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:24,093 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:03:24,093 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-10-28 09:03:24,093 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 09:03:24,093 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-28 09:03:24,094 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:03:24,094 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:03:24,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 09:03:24,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 51 [2020-10-28 09:03:24,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-28 09:03:24,095 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:03:24,264 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:03:24,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:03:24,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:24,274 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:03:24,274 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:03:24,274 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:03:24,275 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:03:24,275 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:03:24,275 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:03:24,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:03:24,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:03:24,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:03:24,276 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:03:24,289 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 216 trivial. 0 not checked. [2020-10-28 09:03:24,290 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1613279668] [2020-10-28 09:03:24,290 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:03:24,291 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 09:03:24,293 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857180168] [2020-10-28 09:03:24,295 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 09:03:24,296 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:03:24,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 09:03:24,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-28 09:03:24,297 INFO L87 Difference]: Start difference. First operand 88 states and 95 transitions. Second operand 12 states. [2020-10-28 09:03:24,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:03:24,593 INFO L93 Difference]: Finished difference Result 168 states and 188 transitions. [2020-10-28 09:03:24,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 09:03:24,593 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 83 [2020-10-28 09:03:24,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:03:24,594 INFO L225 Difference]: With dead ends: 168 [2020-10-28 09:03:24,595 INFO L226 Difference]: Without dead ends: 95 [2020-10-28 09:03:24,596 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-28 09:03:24,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-28 09:03:24,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2020-10-28 09:03:24,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-10-28 09:03:24,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 102 transitions. [2020-10-28 09:03:24,615 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 102 transitions. Word has length 83 [2020-10-28 09:03:24,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:03:24,615 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 102 transitions. [2020-10-28 09:03:24,615 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 09:03:24,615 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 102 transitions. [2020-10-28 09:03:24,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-10-28 09:03:24,624 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:03:24,625 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:03:24,625 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 09:03:24,625 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:03:24,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:03:24,626 INFO L82 PathProgramCache]: Analyzing trace with hash 1418917617, now seen corresponding path program 9 times [2020-10-28 09:03:24,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:03:24,626 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1478442148] [2020-10-28 09:03:24,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:03:24,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:03:24,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:24,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:24,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:24,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:24,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:29,666 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:03:29,666 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 100 [2020-10-28 09:03:29,666 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 09:03:29,667 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-28 09:03:29,667 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:03:29,667 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:03:29,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 09:03:29,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 55 [2020-10-28 09:03:29,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-28 09:03:29,668 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:03:29,822 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:03:29,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:03:29,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:29,827 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:03:29,827 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:03:29,827 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:03:29,827 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:03:29,827 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:03:29,828 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:03:29,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:03:29,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:03:29,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:03:29,828 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:03:29,838 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 270 trivial. 0 not checked. [2020-10-28 09:03:29,839 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1478442148] [2020-10-28 09:03:29,839 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:03:29,839 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-28 09:03:29,840 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825860150] [2020-10-28 09:03:29,840 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-28 09:03:29,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:03:29,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-28 09:03:29,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-28 09:03:29,844 INFO L87 Difference]: Start difference. First operand 95 states and 102 transitions. Second operand 13 states. [2020-10-28 09:03:30,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:03:30,139 INFO L93 Difference]: Finished difference Result 181 states and 201 transitions. [2020-10-28 09:03:30,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 09:03:30,140 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 90 [2020-10-28 09:03:30,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:03:30,141 INFO L225 Difference]: With dead ends: 181 [2020-10-28 09:03:30,141 INFO L226 Difference]: Without dead ends: 102 [2020-10-28 09:03:30,142 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-28 09:03:30,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-28 09:03:30,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2020-10-28 09:03:30,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-10-28 09:03:30,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 109 transitions. [2020-10-28 09:03:30,163 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 109 transitions. Word has length 90 [2020-10-28 09:03:30,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:03:30,163 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 109 transitions. [2020-10-28 09:03:30,164 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-28 09:03:30,164 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 109 transitions. [2020-10-28 09:03:30,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-10-28 09:03:30,168 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:03:30,168 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:03:30,168 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-28 09:03:30,169 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:03:30,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:03:30,170 INFO L82 PathProgramCache]: Analyzing trace with hash 799321638, now seen corresponding path program 10 times [2020-10-28 09:03:30,171 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:03:30,171 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1304932121] [2020-10-28 09:03:30,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:03:30,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:03:30,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:30,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:30,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:30,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:30,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:35,206 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:03:35,206 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 107 [2020-10-28 09:03:35,207 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 09:03:35,207 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-28 09:03:35,207 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:03:35,207 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:03:35,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 09:03:35,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 59 [2020-10-28 09:03:35,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-28 09:03:35,207 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:03:35,370 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:03:35,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:03:35,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:35,375 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:03:35,375 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:03:35,376 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:03:35,376 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:03:35,376 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:03:35,376 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:03:35,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:03:35,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:03:35,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:03:35,377 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:03:35,387 INFO L134 CoverageAnalysis]: Checked inductivity of 385 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2020-10-28 09:03:35,388 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1304932121] [2020-10-28 09:03:35,388 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:03:35,388 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-28 09:03:35,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319844323] [2020-10-28 09:03:35,390 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-28 09:03:35,390 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:03:35,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-28 09:03:35,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-28 09:03:35,392 INFO L87 Difference]: Start difference. First operand 102 states and 109 transitions. Second operand 14 states. [2020-10-28 09:03:35,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:03:35,709 INFO L93 Difference]: Finished difference Result 194 states and 214 transitions. [2020-10-28 09:03:35,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-28 09:03:35,710 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 97 [2020-10-28 09:03:35,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:03:35,711 INFO L225 Difference]: With dead ends: 194 [2020-10-28 09:03:35,711 INFO L226 Difference]: Without dead ends: 109 [2020-10-28 09:03:35,712 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-28 09:03:35,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-28 09:03:35,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2020-10-28 09:03:35,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-10-28 09:03:35,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 116 transitions. [2020-10-28 09:03:35,729 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 116 transitions. Word has length 97 [2020-10-28 09:03:35,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:03:35,730 INFO L481 AbstractCegarLoop]: Abstraction has 109 states and 116 transitions. [2020-10-28 09:03:35,730 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-28 09:03:35,734 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 116 transitions. [2020-10-28 09:03:35,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-10-28 09:03:35,735 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:03:35,736 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:03:35,736 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-28 09:03:35,736 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:03:35,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:03:35,737 INFO L82 PathProgramCache]: Analyzing trace with hash -238096815, now seen corresponding path program 11 times [2020-10-28 09:03:35,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:03:35,737 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [29061844] [2020-10-28 09:03:35,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:03:35,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:03:35,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:35,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:35,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:35,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:35,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:40,773 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:03:40,773 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 114 [2020-10-28 09:03:40,773 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 09:03:40,774 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-28 09:03:40,774 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:03:40,774 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:03:40,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-28 09:03:40,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 50 [2020-10-28 09:03:40,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-28 09:03:40,774 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:03:40,975 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:03:40,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:03:40,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:40,980 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:03:40,980 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:03:40,980 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:03:40,980 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:03:40,980 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:03:40,980 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:03:40,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:03:40,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:03:40,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:03:40,981 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:03:40,988 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 396 trivial. 0 not checked. [2020-10-28 09:03:40,989 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [29061844] [2020-10-28 09:03:40,989 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:03:40,989 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-28 09:03:40,989 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12882260] [2020-10-28 09:03:40,990 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-28 09:03:40,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:03:40,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-28 09:03:40,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-28 09:03:40,993 INFO L87 Difference]: Start difference. First operand 109 states and 116 transitions. Second operand 15 states. [2020-10-28 09:03:41,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:03:41,380 INFO L93 Difference]: Finished difference Result 207 states and 227 transitions. [2020-10-28 09:03:41,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-28 09:03:41,381 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 104 [2020-10-28 09:03:41,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:03:41,382 INFO L225 Difference]: With dead ends: 207 [2020-10-28 09:03:41,383 INFO L226 Difference]: Without dead ends: 116 [2020-10-28 09:03:41,383 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-28 09:03:41,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-10-28 09:03:41,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2020-10-28 09:03:41,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-10-28 09:03:41,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 123 transitions. [2020-10-28 09:03:41,392 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 123 transitions. Word has length 104 [2020-10-28 09:03:41,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:03:41,393 INFO L481 AbstractCegarLoop]: Abstraction has 116 states and 123 transitions. [2020-10-28 09:03:41,393 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-28 09:03:41,393 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 123 transitions. [2020-10-28 09:03:41,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-10-28 09:03:41,394 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:03:41,394 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:03:41,395 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-28 09:03:41,395 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:03:41,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:03:41,395 INFO L82 PathProgramCache]: Analyzing trace with hash -355342394, now seen corresponding path program 12 times [2020-10-28 09:03:41,396 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:03:41,396 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1796954084] [2020-10-28 09:03:41,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:03:41,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:03:41,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:41,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:41,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:41,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:41,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:46,442 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:03:46,442 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 121 [2020-10-28 09:03:46,442 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 09:03:46,443 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-28 09:03:46,443 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:03:46,443 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:03:46,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-28 09:03:46,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-28 09:03:46,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-28 09:03:46,444 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:03:46,653 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:03:46,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:03:46,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:46,657 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:03:46,658 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:03:46,658 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:03:46,658 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:03:46,658 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:03:46,658 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:03:46,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:03:46,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:03:46,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:03:46,659 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:03:46,670 INFO L134 CoverageAnalysis]: Checked inductivity of 546 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 468 trivial. 0 not checked. [2020-10-28 09:03:46,671 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1796954084] [2020-10-28 09:03:46,671 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:03:46,671 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-28 09:03:46,672 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488540233] [2020-10-28 09:03:46,673 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-28 09:03:46,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:03:46,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-28 09:03:46,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-28 09:03:46,674 INFO L87 Difference]: Start difference. First operand 116 states and 123 transitions. Second operand 16 states. [2020-10-28 09:03:47,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:03:47,085 INFO L93 Difference]: Finished difference Result 220 states and 240 transitions. [2020-10-28 09:03:47,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-28 09:03:47,085 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 111 [2020-10-28 09:03:47,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:03:47,087 INFO L225 Difference]: With dead ends: 220 [2020-10-28 09:03:47,087 INFO L226 Difference]: Without dead ends: 123 [2020-10-28 09:03:47,088 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-28 09:03:47,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-10-28 09:03:47,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 123. [2020-10-28 09:03:47,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-10-28 09:03:47,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 130 transitions. [2020-10-28 09:03:47,098 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 130 transitions. Word has length 111 [2020-10-28 09:03:47,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:03:47,098 INFO L481 AbstractCegarLoop]: Abstraction has 123 states and 130 transitions. [2020-10-28 09:03:47,098 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-28 09:03:47,099 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 130 transitions. [2020-10-28 09:03:47,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2020-10-28 09:03:47,100 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:03:47,100 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:03:47,100 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-28 09:03:47,101 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:03:47,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:03:47,101 INFO L82 PathProgramCache]: Analyzing trace with hash -202211919, now seen corresponding path program 13 times [2020-10-28 09:03:47,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:03:47,102 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [832762120] [2020-10-28 09:03:47,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:03:47,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:03:47,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:47,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:47,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:47,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:47,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:52,150 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:03:52,150 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 128 [2020-10-28 09:03:52,150 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 09:03:52,150 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-28 09:03:52,151 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:03:52,151 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:03:52,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-28 09:03:52,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 71 [2020-10-28 09:03:52,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-28 09:03:52,151 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:03:52,382 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:03:52,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:03:52,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:52,389 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:03:52,389 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:03:52,389 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:03:52,389 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:03:52,389 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:03:52,390 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:03:52,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:03:52,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:03:52,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:03:52,390 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:03:52,402 INFO L134 CoverageAnalysis]: Checked inductivity of 637 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 546 trivial. 0 not checked. [2020-10-28 09:03:52,402 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [832762120] [2020-10-28 09:03:52,403 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:03:52,403 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-28 09:03:52,403 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031569655] [2020-10-28 09:03:52,404 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-28 09:03:52,404 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:03:52,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-28 09:03:52,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-28 09:03:52,405 INFO L87 Difference]: Start difference. First operand 123 states and 130 transitions. Second operand 17 states. [2020-10-28 09:03:52,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:03:52,821 INFO L93 Difference]: Finished difference Result 233 states and 253 transitions. [2020-10-28 09:03:52,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-28 09:03:52,822 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 118 [2020-10-28 09:03:52,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:03:52,823 INFO L225 Difference]: With dead ends: 233 [2020-10-28 09:03:52,823 INFO L226 Difference]: Without dead ends: 130 [2020-10-28 09:03:52,825 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-28 09:03:52,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-10-28 09:03:52,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 130. [2020-10-28 09:03:52,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-10-28 09:03:52,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 137 transitions. [2020-10-28 09:03:52,836 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 137 transitions. Word has length 118 [2020-10-28 09:03:52,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:03:52,837 INFO L481 AbstractCegarLoop]: Abstraction has 130 states and 137 transitions. [2020-10-28 09:03:52,837 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-28 09:03:52,837 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 137 transitions. [2020-10-28 09:03:52,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2020-10-28 09:03:52,838 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:03:52,838 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:03:52,838 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-28 09:03:52,839 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:03:52,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:03:52,839 INFO L82 PathProgramCache]: Analyzing trace with hash 181143910, now seen corresponding path program 14 times [2020-10-28 09:03:52,839 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:03:52,839 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [491322634] [2020-10-28 09:03:52,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:03:52,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:03:52,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:52,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:53,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:53,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:53,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:57,883 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:03:57,883 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 135 [2020-10-28 09:03:57,884 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 09:03:57,884 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-28 09:03:57,884 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:03:57,884 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:03:57,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-28 09:03:57,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 59 [2020-10-28 09:03:57,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-28 09:03:57,884 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:03:58,137 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:03:58,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:03:58,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:58,144 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:03:58,144 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:03:58,144 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:03:58,144 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:03:58,144 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:03:58,144 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:03:58,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:03:58,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:03:58,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:03:58,145 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:03:58,159 INFO L134 CoverageAnalysis]: Checked inductivity of 735 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 630 trivial. 0 not checked. [2020-10-28 09:03:58,159 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [491322634] [2020-10-28 09:03:58,159 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:03:58,160 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-28 09:03:58,160 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681695991] [2020-10-28 09:03:58,160 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-28 09:03:58,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:03:58,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-28 09:03:58,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-28 09:03:58,162 INFO L87 Difference]: Start difference. First operand 130 states and 137 transitions. Second operand 18 states. [2020-10-28 09:03:58,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:03:58,603 INFO L93 Difference]: Finished difference Result 246 states and 266 transitions. [2020-10-28 09:03:58,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-28 09:03:58,604 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 125 [2020-10-28 09:03:58,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:03:58,605 INFO L225 Difference]: With dead ends: 246 [2020-10-28 09:03:58,606 INFO L226 Difference]: Without dead ends: 137 [2020-10-28 09:03:58,608 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-28 09:03:58,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-10-28 09:03:58,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2020-10-28 09:03:58,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-10-28 09:03:58,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 144 transitions. [2020-10-28 09:03:58,626 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 144 transitions. Word has length 125 [2020-10-28 09:03:58,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:03:58,628 INFO L481 AbstractCegarLoop]: Abstraction has 137 states and 144 transitions. [2020-10-28 09:03:58,628 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-28 09:03:58,628 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 144 transitions. [2020-10-28 09:03:58,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2020-10-28 09:03:58,630 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:03:58,631 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:03:58,632 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-28 09:03:58,632 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:03:58,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:03:58,632 INFO L82 PathProgramCache]: Analyzing trace with hash 1575724305, now seen corresponding path program 15 times [2020-10-28 09:03:58,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:03:58,633 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1458168764] [2020-10-28 09:03:58,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:03:58,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:03:58,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:58,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:58,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:58,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:59,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:04:03,687 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:04:03,687 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 142 [2020-10-28 09:04:03,687 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 09:04:03,687 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-28 09:04:03,687 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:04:03,687 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:04:03,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-28 09:04:03,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 79 [2020-10-28 09:04:03,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-28 09:04:03,688 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:04:03,966 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:04:03,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:04:03,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:04:03,972 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:04:03,972 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:04:03,972 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:04:03,972 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:04:03,972 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:04:03,973 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:04:03,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:04:03,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:04:03,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:04:03,973 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:04:03,988 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 720 trivial. 0 not checked. [2020-10-28 09:04:03,988 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1458168764] [2020-10-28 09:04:03,988 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:04:03,988 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-28 09:04:03,989 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019593848] [2020-10-28 09:04:03,989 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-28 09:04:03,989 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:04:03,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-28 09:04:03,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-28 09:04:03,990 INFO L87 Difference]: Start difference. First operand 137 states and 144 transitions. Second operand 19 states. [2020-10-28 09:04:04,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:04:04,485 INFO L93 Difference]: Finished difference Result 259 states and 279 transitions. [2020-10-28 09:04:04,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-28 09:04:04,485 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 132 [2020-10-28 09:04:04,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:04:04,487 INFO L225 Difference]: With dead ends: 259 [2020-10-28 09:04:04,487 INFO L226 Difference]: Without dead ends: 144 [2020-10-28 09:04:04,488 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-28 09:04:04,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-10-28 09:04:04,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 144. [2020-10-28 09:04:04,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-10-28 09:04:04,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 151 transitions. [2020-10-28 09:04:04,499 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 151 transitions. Word has length 132 [2020-10-28 09:04:04,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:04:04,499 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 151 transitions. [2020-10-28 09:04:04,499 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-28 09:04:04,499 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 151 transitions. [2020-10-28 09:04:04,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2020-10-28 09:04:04,501 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:04:04,501 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:04:04,501 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-28 09:04:04,501 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:04:04,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:04:04,502 INFO L82 PathProgramCache]: Analyzing trace with hash 1701122822, now seen corresponding path program 16 times [2020-10-28 09:04:04,502 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:04:04,502 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1449450941] [2020-10-28 09:04:04,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:04:04,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:04:04,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:04:04,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:04:04,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:04:04,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:04:05,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:04:09,559 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:04:09,560 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 149 [2020-10-28 09:04:09,560 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 09:04:09,560 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-28 09:04:09,560 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:04:09,560 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:04:09,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-28 09:04:09,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 83 [2020-10-28 09:04:09,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-28 09:04:09,561 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:04:09,862 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:04:09,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:04:09,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:04:09,867 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:04:09,867 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:04:09,867 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:04:09,867 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:04:09,868 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:04:09,868 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:04:09,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:04:09,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:04:09,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:04:09,868 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:04:09,882 INFO L134 CoverageAnalysis]: Checked inductivity of 952 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 816 trivial. 0 not checked. [2020-10-28 09:04:09,882 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1449450941] [2020-10-28 09:04:09,882 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:04:09,882 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-28 09:04:09,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743693380] [2020-10-28 09:04:09,883 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-28 09:04:09,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:04:09,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-28 09:04:09,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-28 09:04:09,884 INFO L87 Difference]: Start difference. First operand 144 states and 151 transitions. Second operand 20 states. [2020-10-28 09:04:10,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:04:10,381 INFO L93 Difference]: Finished difference Result 272 states and 292 transitions. [2020-10-28 09:04:10,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-28 09:04:10,381 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 139 [2020-10-28 09:04:10,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:04:10,383 INFO L225 Difference]: With dead ends: 272 [2020-10-28 09:04:10,383 INFO L226 Difference]: Without dead ends: 151 [2020-10-28 09:04:10,385 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-28 09:04:10,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-10-28 09:04:10,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2020-10-28 09:04:10,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2020-10-28 09:04:10,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 158 transitions. [2020-10-28 09:04:10,394 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 158 transitions. Word has length 139 [2020-10-28 09:04:10,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:04:10,395 INFO L481 AbstractCegarLoop]: Abstraction has 151 states and 158 transitions. [2020-10-28 09:04:10,395 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-28 09:04:10,395 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 158 transitions. [2020-10-28 09:04:10,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-10-28 09:04:10,396 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:04:10,397 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:04:10,397 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-28 09:04:10,397 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:04:10,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:04:10,398 INFO L82 PathProgramCache]: Analyzing trace with hash -265788303, now seen corresponding path program 17 times [2020-10-28 09:04:10,398 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:04:10,398 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [300771926] [2020-10-28 09:04:10,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:04:10,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:04:10,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:04:10,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:04:10,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:04:10,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:04:11,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:04:15,451 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:04:15,451 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 156 [2020-10-28 09:04:15,451 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 09:04:15,451 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-28 09:04:15,451 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:04:15,451 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:04:15,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-28 09:04:15,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:04:15,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-28 09:04:15,454 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-28 09:04:15,774 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:04:15,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:04:15,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:04:15,778 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:04:15,778 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:04:15,779 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:04:15,779 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:04:15,779 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:04:15,779 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:04:15,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:04:15,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:04:15,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:04:15,780 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:04:15,796 INFO L134 CoverageAnalysis]: Checked inductivity of 1071 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 918 trivial. 0 not checked. [2020-10-28 09:04:15,797 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [300771926] [2020-10-28 09:04:15,797 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:04:15,797 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-28 09:04:15,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299524355] [2020-10-28 09:04:15,798 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-28 09:04:15,798 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:04:15,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-28 09:04:15,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-28 09:04:15,799 INFO L87 Difference]: Start difference. First operand 151 states and 158 transitions. Second operand 21 states. [2020-10-28 09:04:16,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:04:16,300 INFO L93 Difference]: Finished difference Result 285 states and 305 transitions. [2020-10-28 09:04:16,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-28 09:04:16,301 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 146 [2020-10-28 09:04:16,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:04:16,303 INFO L225 Difference]: With dead ends: 285 [2020-10-28 09:04:16,303 INFO L226 Difference]: Without dead ends: 158 [2020-10-28 09:04:16,304 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-28 09:04:16,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2020-10-28 09:04:16,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 158. [2020-10-28 09:04:16,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2020-10-28 09:04:16,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 165 transitions. [2020-10-28 09:04:16,317 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 165 transitions. Word has length 146 [2020-10-28 09:04:16,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:04:16,318 INFO L481 AbstractCegarLoop]: Abstraction has 158 states and 165 transitions. [2020-10-28 09:04:16,318 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-28 09:04:16,318 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 165 transitions. [2020-10-28 09:04:16,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2020-10-28 09:04:16,319 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:04:16,320 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:04:16,320 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-28 09:04:16,320 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:04:16,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:04:16,320 INFO L82 PathProgramCache]: Analyzing trace with hash -1024523098, now seen corresponding path program 18 times [2020-10-28 09:04:16,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:04:16,321 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2122643123] [2020-10-28 09:04:16,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:04:16,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:04:16,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:04:16,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:04:16,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:04:16,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:04:17,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:04:21,401 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:04:21,401 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 163 [2020-10-28 09:04:21,401 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 09:04:21,401 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5023 [2020-10-28 09:04:21,401 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:04:21,402 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:04:21,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-28 09:04:21,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 71 [2020-10-28 09:04:21,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-28 09:04:21,402 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:04:21,758 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:04:21,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:04:21,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:04:21,764 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:04:21,764 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:04:21,764 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:04:21,764 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:04:21,765 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:04:21,765 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:04:21,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:04:21,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:04:21,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:04:21,765 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:04:21,779 INFO L134 CoverageAnalysis]: Checked inductivity of 1197 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 1026 trivial. 0 not checked. [2020-10-28 09:04:21,779 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2122643123] [2020-10-28 09:04:21,779 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:04:21,779 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-28 09:04:21,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339072449] [2020-10-28 09:04:21,780 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-28 09:04:21,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:04:21,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-28 09:04:21,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-28 09:04:21,781 INFO L87 Difference]: Start difference. First operand 158 states and 165 transitions. Second operand 22 states. [2020-10-28 09:04:22,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:04:22,333 INFO L93 Difference]: Finished difference Result 298 states and 318 transitions. [2020-10-28 09:04:22,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-28 09:04:22,334 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 153 [2020-10-28 09:04:22,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:04:22,335 INFO L225 Difference]: With dead ends: 298 [2020-10-28 09:04:22,335 INFO L226 Difference]: Without dead ends: 165 [2020-10-28 09:04:22,337 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-28 09:04:22,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2020-10-28 09:04:22,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 165. [2020-10-28 09:04:22,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2020-10-28 09:04:22,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 172 transitions. [2020-10-28 09:04:22,347 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 172 transitions. Word has length 153 [2020-10-28 09:04:22,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:04:22,349 INFO L481 AbstractCegarLoop]: Abstraction has 165 states and 172 transitions. [2020-10-28 09:04:22,349 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-28 09:04:22,349 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 172 transitions. [2020-10-28 09:04:22,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2020-10-28 09:04:22,353 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:04:22,353 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:04:22,353 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-28 09:04:22,354 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:04:22,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:04:22,354 INFO L82 PathProgramCache]: Analyzing trace with hash 144096209, now seen corresponding path program 19 times [2020-10-28 09:04:22,354 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:04:22,355 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1132604333] [2020-10-28 09:04:22,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:04:22,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:04:22,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:04:22,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:04:22,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:04:22,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:04:23,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:04:27,445 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:04:27,445 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 170 [2020-10-28 09:04:27,445 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 09:04:27,445 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5039 [2020-10-28 09:04:27,445 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:04:27,445 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:04:27,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-28 09:04:27,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 53 [2020-10-28 09:04:27,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-28 09:04:27,446 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:04:27,829 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:04:27,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:04:27,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:04:27,834 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:04:27,834 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:04:27,834 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:04:27,834 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:04:27,834 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:04:27,834 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:04:27,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:04:27,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:04:27,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:04:27,835 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:04:27,850 INFO L134 CoverageAnalysis]: Checked inductivity of 1330 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 1140 trivial. 0 not checked. [2020-10-28 09:04:27,850 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1132604333] [2020-10-28 09:04:27,850 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:04:27,851 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-28 09:04:27,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7045092] [2020-10-28 09:04:27,851 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-28 09:04:27,851 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:04:27,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-28 09:04:27,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-28 09:04:27,853 INFO L87 Difference]: Start difference. First operand 165 states and 172 transitions. Second operand 23 states. [2020-10-28 09:04:28,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:04:28,325 INFO L93 Difference]: Finished difference Result 311 states and 331 transitions. [2020-10-28 09:04:28,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-28 09:04:28,326 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 160 [2020-10-28 09:04:28,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:04:28,328 INFO L225 Difference]: With dead ends: 311 [2020-10-28 09:04:28,328 INFO L226 Difference]: Without dead ends: 172 [2020-10-28 09:04:28,329 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-28 09:04:28,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-10-28 09:04:28,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 172. [2020-10-28 09:04:28,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2020-10-28 09:04:28,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 179 transitions. [2020-10-28 09:04:28,338 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 179 transitions. Word has length 160 [2020-10-28 09:04:28,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:04:28,338 INFO L481 AbstractCegarLoop]: Abstraction has 172 states and 179 transitions. [2020-10-28 09:04:28,338 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-28 09:04:28,338 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 179 transitions. [2020-10-28 09:04:28,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2020-10-28 09:04:28,340 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:04:28,340 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:04:28,341 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-28 09:04:28,341 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:04:28,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:04:28,341 INFO L82 PathProgramCache]: Analyzing trace with hash -29630906, now seen corresponding path program 20 times [2020-10-28 09:04:28,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:04:28,342 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1513463070] [2020-10-28 09:04:28,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:04:28,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:04:28,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:04:28,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:04:28,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:04:28,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:04:29,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:04:33,403 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:04:33,404 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 177 [2020-10-28 09:04:33,404 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 09:04:33,404 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-28 09:04:33,404 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:04:33,404 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:04:33,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-28 09:04:33,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 99 [2020-10-28 09:04:33,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-28 09:04:33,405 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:04:33,834 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:04:33,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:04:33,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:04:33,838 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:04:33,838 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:04:33,839 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:04:33,839 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:04:33,839 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:04:33,839 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:04:33,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:04:33,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:04:33,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:04:33,840 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:04:33,858 INFO L134 CoverageAnalysis]: Checked inductivity of 1470 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 1260 trivial. 0 not checked. [2020-10-28 09:04:33,859 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1513463070] [2020-10-28 09:04:33,859 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:04:33,859 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-28 09:04:33,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916146312] [2020-10-28 09:04:33,860 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-28 09:04:33,860 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:04:33,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-28 09:04:33,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-28 09:04:33,861 INFO L87 Difference]: Start difference. First operand 172 states and 179 transitions. Second operand 24 states. [2020-10-28 09:04:34,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:04:34,432 INFO L93 Difference]: Finished difference Result 324 states and 344 transitions. [2020-10-28 09:04:34,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-28 09:04:34,433 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 167 [2020-10-28 09:04:34,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:04:34,435 INFO L225 Difference]: With dead ends: 324 [2020-10-28 09:04:34,435 INFO L226 Difference]: Without dead ends: 179 [2020-10-28 09:04:34,436 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-28 09:04:34,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2020-10-28 09:04:34,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 179. [2020-10-28 09:04:34,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2020-10-28 09:04:34,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 186 transitions. [2020-10-28 09:04:34,460 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 186 transitions. Word has length 167 [2020-10-28 09:04:34,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:04:34,461 INFO L481 AbstractCegarLoop]: Abstraction has 179 states and 186 transitions. [2020-10-28 09:04:34,461 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-28 09:04:34,461 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 186 transitions. [2020-10-28 09:04:34,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2020-10-28 09:04:34,462 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:04:34,463 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:04:34,463 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-28 09:04:34,463 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:04:34,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:04:34,463 INFO L82 PathProgramCache]: Analyzing trace with hash -2103137487, now seen corresponding path program 21 times [2020-10-28 09:04:34,464 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:04:34,464 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1054001595] [2020-10-28 09:04:34,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:04:34,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:04:34,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:04:34,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:04:34,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:04:34,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:04:35,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:04:39,532 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:04:39,532 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 184 [2020-10-28 09:04:39,532 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 09:04:39,532 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-28 09:04:39,532 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:04:39,532 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:04:39,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-28 09:04:39,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:04:39,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-28 09:04:39,533 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:04:39,976 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:04:39,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:04:39,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:04:39,981 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:04:39,981 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:04:39,981 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:04:39,981 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:04:39,981 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:04:39,981 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:04:39,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:04:39,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:04:39,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:04:39,982 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:04:39,997 INFO L134 CoverageAnalysis]: Checked inductivity of 1617 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 1386 trivial. 0 not checked. [2020-10-28 09:04:39,998 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1054001595] [2020-10-28 09:04:39,998 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:04:39,998 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-28 09:04:39,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142723732] [2020-10-28 09:04:39,999 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-28 09:04:39,999 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:04:40,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-28 09:04:40,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-28 09:04:40,000 INFO L87 Difference]: Start difference. First operand 179 states and 186 transitions. Second operand 25 states. [2020-10-28 09:04:40,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:04:40,592 INFO L93 Difference]: Finished difference Result 337 states and 357 transitions. [2020-10-28 09:04:40,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-28 09:04:40,593 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 174 [2020-10-28 09:04:40,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:04:40,594 INFO L225 Difference]: With dead ends: 337 [2020-10-28 09:04:40,595 INFO L226 Difference]: Without dead ends: 186 [2020-10-28 09:04:40,596 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-28 09:04:40,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-10-28 09:04:40,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 186. [2020-10-28 09:04:40,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2020-10-28 09:04:40,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 193 transitions. [2020-10-28 09:04:40,606 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 193 transitions. Word has length 174 [2020-10-28 09:04:40,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:04:40,607 INFO L481 AbstractCegarLoop]: Abstraction has 186 states and 193 transitions. [2020-10-28 09:04:40,607 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-28 09:04:40,607 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 193 transitions. [2020-10-28 09:04:40,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2020-10-28 09:04:40,608 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:04:40,608 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:04:40,608 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-28 09:04:40,609 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:04:40,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:04:40,609 INFO L82 PathProgramCache]: Analyzing trace with hash 614309862, now seen corresponding path program 22 times [2020-10-28 09:04:40,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:04:40,610 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [329641748] [2020-10-28 09:04:40,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:04:40,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:04:40,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:04:40,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:04:41,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:04:41,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:04:42,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:04:45,700 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:04:45,700 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 191 [2020-10-28 09:04:45,700 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 09:04:45,700 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5030 [2020-10-28 09:04:45,700 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:04:45,701 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:04:45,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-28 09:04:45,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 107 [2020-10-28 09:04:45,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-28 09:04:45,701 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:04:46,206 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:04:46,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:04:46,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:04:46,214 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:04:46,214 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:04:46,214 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:04:46,214 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 09:04:46,214 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:04:46,215 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:04:46,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:04:46,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:04:46,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:04:46,215 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:04:46,259 INFO L134 CoverageAnalysis]: Checked inductivity of 1771 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 1518 trivial. 0 not checked. [2020-10-28 09:04:46,260 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [329641748] [2020-10-28 09:04:46,260 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:04:46,260 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-28 09:04:46,260 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59023405] [2020-10-28 09:04:46,260 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-28 09:04:46,261 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:04:46,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-28 09:04:46,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-28 09:04:46,262 INFO L87 Difference]: Start difference. First operand 186 states and 193 transitions. Second operand 26 states. [2020-10-28 09:04:46,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:04:46,868 INFO L93 Difference]: Finished difference Result 350 states and 370 transitions. [2020-10-28 09:04:46,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-28 09:04:46,868 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 181 [2020-10-28 09:04:46,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:04:46,870 INFO L225 Difference]: With dead ends: 350 [2020-10-28 09:04:46,870 INFO L226 Difference]: Without dead ends: 193 [2020-10-28 09:04:46,872 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-28 09:04:46,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2020-10-28 09:04:46,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 193. [2020-10-28 09:04:46,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2020-10-28 09:04:46,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 200 transitions. [2020-10-28 09:04:46,881 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 200 transitions. Word has length 181 [2020-10-28 09:04:46,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:04:46,881 INFO L481 AbstractCegarLoop]: Abstraction has 193 states and 200 transitions. [2020-10-28 09:04:46,882 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-28 09:04:46,882 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 200 transitions. [2020-10-28 09:04:46,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2020-10-28 09:04:46,883 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:04:46,883 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:04:46,883 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-28 09:04:46,883 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:04:46,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:04:46,884 INFO L82 PathProgramCache]: Analyzing trace with hash -1757400431, now seen corresponding path program 23 times [2020-10-28 09:04:46,884 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:04:46,884 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [200588625] [2020-10-28 09:04:46,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:04:46,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:04:46,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:04:47,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:04:47,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:04:47,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:04:48,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:04:51,958 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:04:51,958 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 198 [2020-10-28 09:04:51,958 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 09:04:51,958 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-28 09:04:51,959 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:04:51,959 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:04:51,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-28 09:04:51,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 86 [2020-10-28 09:04:51,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-28 09:04:51,959 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:04:52,479 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:04:52,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:04:52,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:04:52,487 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:04:52,487 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:04:52,487 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:04:52,487 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:04:52,487 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:04:52,487 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:04:52,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:04:52,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:04:52,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:04:52,488 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:04:52,507 INFO L134 CoverageAnalysis]: Checked inductivity of 1932 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 1656 trivial. 0 not checked. [2020-10-28 09:04:52,507 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [200588625] [2020-10-28 09:04:52,507 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:04:52,507 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-28 09:04:52,507 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917781308] [2020-10-28 09:04:52,508 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-28 09:04:52,508 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:04:52,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-28 09:04:52,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-28 09:04:52,509 INFO L87 Difference]: Start difference. First operand 193 states and 200 transitions. Second operand 27 states. [2020-10-28 09:04:53,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:04:53,163 INFO L93 Difference]: Finished difference Result 363 states and 383 transitions. [2020-10-28 09:04:53,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-28 09:04:53,164 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 188 [2020-10-28 09:04:53,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:04:53,166 INFO L225 Difference]: With dead ends: 363 [2020-10-28 09:04:53,166 INFO L226 Difference]: Without dead ends: 200 [2020-10-28 09:04:53,167 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-28 09:04:53,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2020-10-28 09:04:53,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 200. [2020-10-28 09:04:53,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2020-10-28 09:04:53,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 207 transitions. [2020-10-28 09:04:53,178 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 207 transitions. Word has length 188 [2020-10-28 09:04:53,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:04:53,178 INFO L481 AbstractCegarLoop]: Abstraction has 200 states and 207 transitions. [2020-10-28 09:04:53,178 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-28 09:04:53,178 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 207 transitions. [2020-10-28 09:04:53,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2020-10-28 09:04:53,180 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:04:53,180 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:04:53,180 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-28 09:04:53,180 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:04:53,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:04:53,181 INFO L82 PathProgramCache]: Analyzing trace with hash -1780070010, now seen corresponding path program 24 times [2020-10-28 09:04:53,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:04:53,181 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1686930709] [2020-10-28 09:04:53,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:04:53,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:04:53,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:04:53,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:04:53,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:04:53,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:04:54,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:04:58,239 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:04:58,239 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 205 [2020-10-28 09:04:58,239 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 09:04:58,239 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-28 09:04:58,239 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:04:58,239 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:04:58,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-28 09:04:58,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 37 [2020-10-28 09:04:58,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-28 09:04:58,240 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:04:58,936 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:04:58,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:04:58,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:04:58,941 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:04:58,941 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:04:58,941 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:04:58,942 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:04:58,942 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:04:58,942 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:04:58,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:04:58,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:04:58,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:04:58,943 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:04:58,975 INFO L134 CoverageAnalysis]: Checked inductivity of 2100 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 1800 trivial. 0 not checked. [2020-10-28 09:04:58,976 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1686930709] [2020-10-28 09:04:58,976 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:04:58,976 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-28 09:04:58,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101492577] [2020-10-28 09:04:58,977 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-28 09:04:58,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:04:58,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-28 09:04:58,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-28 09:04:58,978 INFO L87 Difference]: Start difference. First operand 200 states and 207 transitions. Second operand 28 states. [2020-10-28 09:04:59,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:04:59,593 INFO L93 Difference]: Finished difference Result 376 states and 396 transitions. [2020-10-28 09:04:59,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-28 09:04:59,594 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 195 [2020-10-28 09:04:59,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:04:59,595 INFO L225 Difference]: With dead ends: 376 [2020-10-28 09:04:59,596 INFO L226 Difference]: Without dead ends: 207 [2020-10-28 09:04:59,597 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-28 09:04:59,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2020-10-28 09:04:59,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 207. [2020-10-28 09:04:59,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 207 states. [2020-10-28 09:04:59,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 214 transitions. [2020-10-28 09:04:59,606 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 214 transitions. Word has length 195 [2020-10-28 09:04:59,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:04:59,607 INFO L481 AbstractCegarLoop]: Abstraction has 207 states and 214 transitions. [2020-10-28 09:04:59,607 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-28 09:04:59,607 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 214 transitions. [2020-10-28 09:04:59,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2020-10-28 09:04:59,608 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:04:59,609 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:04:59,609 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-28 09:04:59,609 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:04:59,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:04:59,609 INFO L82 PathProgramCache]: Analyzing trace with hash -1126739471, now seen corresponding path program 25 times [2020-10-28 09:04:59,610 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:04:59,610 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [426574836] [2020-10-28 09:04:59,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:04:59,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:04:59,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:04:59,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:05:00,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:05:00,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:05:01,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:05:04,722 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:05:04,722 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 212 [2020-10-28 09:05:04,722 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 09:05:04,722 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5040 [2020-10-28 09:05:04,722 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:05:04,723 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:05:04,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-28 09:05:04,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 119 [2020-10-28 09:05:04,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-28 09:05:04,723 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:05:05,318 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:05:05,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:05:05,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:05:05,323 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:05:05,324 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:05:05,324 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:05:05,324 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:05:05,324 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:05:05,324 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:05:05,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:05:05,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:05:05,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:05:05,325 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:05:05,385 INFO L134 CoverageAnalysis]: Checked inductivity of 2275 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 1950 trivial. 0 not checked. [2020-10-28 09:05:05,386 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [426574836] [2020-10-28 09:05:05,386 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:05:05,386 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-28 09:05:05,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034015584] [2020-10-28 09:05:05,387 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-28 09:05:05,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:05:05,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-28 09:05:05,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-28 09:05:05,388 INFO L87 Difference]: Start difference. First operand 207 states and 214 transitions. Second operand 29 states. [2020-10-28 09:05:06,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:05:06,062 INFO L93 Difference]: Finished difference Result 389 states and 409 transitions. [2020-10-28 09:05:06,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-28 09:05:06,062 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 202 [2020-10-28 09:05:06,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:05:06,064 INFO L225 Difference]: With dead ends: 389 [2020-10-28 09:05:06,064 INFO L226 Difference]: Without dead ends: 214 [2020-10-28 09:05:06,065 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-28 09:05:06,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2020-10-28 09:05:06,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 214. [2020-10-28 09:05:06,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2020-10-28 09:05:06,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 221 transitions. [2020-10-28 09:05:06,076 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 221 transitions. Word has length 202 [2020-10-28 09:05:06,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:05:06,076 INFO L481 AbstractCegarLoop]: Abstraction has 214 states and 221 transitions. [2020-10-28 09:05:06,076 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-28 09:05:06,076 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 221 transitions. [2020-10-28 09:05:06,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2020-10-28 09:05:06,077 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:05:06,078 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:05:06,078 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-28 09:05:06,078 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:05:06,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:05:06,079 INFO L82 PathProgramCache]: Analyzing trace with hash 610786086, now seen corresponding path program 26 times [2020-10-28 09:05:06,079 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:05:06,079 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1960411452] [2020-10-28 09:05:06,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:05:06,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:05:06,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:05:06,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:05:06,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:05:06,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:05:08,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:05:11,161 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:05:11,161 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 219 [2020-10-28 09:05:11,161 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 09:05:11,161 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-28 09:05:11,162 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:05:11,162 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:05:11,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-28 09:05:11,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 39 [2020-10-28 09:05:11,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-28 09:05:11,162 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:05:11,790 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:05:11,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:05:11,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:05:11,796 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:05:11,796 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:05:11,796 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:05:11,796 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 09:05:11,797 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:05:11,797 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:05:11,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:05:11,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:05:11,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:05:11,797 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:05:11,833 INFO L134 CoverageAnalysis]: Checked inductivity of 2457 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 2106 trivial. 0 not checked. [2020-10-28 09:05:11,833 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1960411452] [2020-10-28 09:05:11,833 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:05:11,834 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-28 09:05:11,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150873726] [2020-10-28 09:05:11,834 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-28 09:05:11,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:05:11,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-28 09:05:11,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-28 09:05:11,837 INFO L87 Difference]: Start difference. First operand 214 states and 221 transitions. Second operand 30 states. [2020-10-28 09:05:12,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:05:12,570 INFO L93 Difference]: Finished difference Result 402 states and 422 transitions. [2020-10-28 09:05:12,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-28 09:05:12,571 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 209 [2020-10-28 09:05:12,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:05:12,573 INFO L225 Difference]: With dead ends: 402 [2020-10-28 09:05:12,573 INFO L226 Difference]: Without dead ends: 221 [2020-10-28 09:05:12,575 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-28 09:05:12,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2020-10-28 09:05:12,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 221. [2020-10-28 09:05:12,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 221 states. [2020-10-28 09:05:12,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 228 transitions. [2020-10-28 09:05:12,584 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 228 transitions. Word has length 209 [2020-10-28 09:05:12,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:05:12,584 INFO L481 AbstractCegarLoop]: Abstraction has 221 states and 228 transitions. [2020-10-28 09:05:12,584 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-28 09:05:12,584 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 228 transitions. [2020-10-28 09:05:12,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2020-10-28 09:05:12,586 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:05:12,586 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:05:12,586 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-28 09:05:12,586 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:05:12,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:05:12,587 INFO L82 PathProgramCache]: Analyzing trace with hash -2024273583, now seen corresponding path program 27 times [2020-10-28 09:05:12,587 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:05:12,587 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1008131123] [2020-10-28 09:05:12,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:05:12,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:05:12,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:05:12,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:05:13,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:05:13,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:05:14,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:05:17,648 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:05:17,648 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 226 [2020-10-28 09:05:17,648 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 09:05:17,648 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-28 09:05:17,649 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:05:17,649 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:05:17,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-28 09:05:17,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 69 [2020-10-28 09:05:17,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-28 09:05:17,649 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:05:18,323 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:05:18,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:05:18,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:05:18,328 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:05:18,328 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:05:18,328 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:05:18,328 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:05:18,328 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:05:18,329 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:05:18,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:05:18,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:05:18,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:05:18,329 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:05:18,367 INFO L134 CoverageAnalysis]: Checked inductivity of 2646 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 2268 trivial. 0 not checked. [2020-10-28 09:05:18,368 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1008131123] [2020-10-28 09:05:18,368 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:05:18,368 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-28 09:05:18,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101428507] [2020-10-28 09:05:18,369 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-28 09:05:18,369 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:05:18,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-28 09:05:18,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-28 09:05:18,370 INFO L87 Difference]: Start difference. First operand 221 states and 228 transitions. Second operand 31 states. [2020-10-28 09:05:19,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:05:19,110 INFO L93 Difference]: Finished difference Result 415 states and 435 transitions. [2020-10-28 09:05:19,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-28 09:05:19,111 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 216 [2020-10-28 09:05:19,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:05:19,112 INFO L225 Difference]: With dead ends: 415 [2020-10-28 09:05:19,112 INFO L226 Difference]: Without dead ends: 228 [2020-10-28 09:05:19,114 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-28 09:05:19,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2020-10-28 09:05:19,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 228. [2020-10-28 09:05:19,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 228 states. [2020-10-28 09:05:19,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 235 transitions. [2020-10-28 09:05:19,122 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 235 transitions. Word has length 216 [2020-10-28 09:05:19,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:05:19,123 INFO L481 AbstractCegarLoop]: Abstraction has 228 states and 235 transitions. [2020-10-28 09:05:19,123 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-28 09:05:19,123 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 235 transitions. [2020-10-28 09:05:19,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2020-10-28 09:05:19,124 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:05:19,124 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:05:19,125 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-28 09:05:19,125 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:05:19,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:05:19,125 INFO L82 PathProgramCache]: Analyzing trace with hash 888427718, now seen corresponding path program 28 times [2020-10-28 09:05:19,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:05:19,126 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [330322950] [2020-10-28 09:05:19,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:05:19,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:05:19,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:05:19,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:05:19,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:05:19,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:05:21,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:05:24,224 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:05:24,225 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 233 [2020-10-28 09:05:24,225 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 09:05:24,225 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5018 [2020-10-28 09:05:24,225 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:05:24,225 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:05:24,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-28 09:05:24,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 131 [2020-10-28 09:05:24,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-28 09:05:24,226 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:05:24,996 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:05:25,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:05:25,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:05:25,002 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:05:25,003 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:05:25,003 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:05:25,003 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:05:25,003 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:05:25,003 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:05:25,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:05:25,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:05:25,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:05:25,004 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:05:25,035 INFO L134 CoverageAnalysis]: Checked inductivity of 2842 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 2436 trivial. 0 not checked. [2020-10-28 09:05:25,036 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [330322950] [2020-10-28 09:05:25,036 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:05:25,036 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-28 09:05:25,036 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276279175] [2020-10-28 09:05:25,036 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-28 09:05:25,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:05:25,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-28 09:05:25,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-28 09:05:25,038 INFO L87 Difference]: Start difference. First operand 228 states and 235 transitions. Second operand 32 states. [2020-10-28 09:05:25,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:05:25,777 INFO L93 Difference]: Finished difference Result 428 states and 448 transitions. [2020-10-28 09:05:25,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-28 09:05:25,778 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 223 [2020-10-28 09:05:25,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:05:25,780 INFO L225 Difference]: With dead ends: 428 [2020-10-28 09:05:25,780 INFO L226 Difference]: Without dead ends: 235 [2020-10-28 09:05:25,781 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-28 09:05:25,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2020-10-28 09:05:25,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 235. [2020-10-28 09:05:25,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 235 states. [2020-10-28 09:05:25,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 242 transitions. [2020-10-28 09:05:25,794 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 242 transitions. Word has length 223 [2020-10-28 09:05:25,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:05:25,794 INFO L481 AbstractCegarLoop]: Abstraction has 235 states and 242 transitions. [2020-10-28 09:05:25,794 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-28 09:05:25,794 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 242 transitions. [2020-10-28 09:05:25,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2020-10-28 09:05:25,795 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:05:25,796 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:05:25,796 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-28 09:05:25,796 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:05:25,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:05:25,797 INFO L82 PathProgramCache]: Analyzing trace with hash -2010097487, now seen corresponding path program 29 times [2020-10-28 09:05:25,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:05:25,797 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2014236650] [2020-10-28 09:05:25,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:05:25,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:05:25,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:05:26,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:05:26,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:05:26,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:05:27,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:05:30,915 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:05:30,915 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 240 [2020-10-28 09:05:30,916 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 09:05:30,916 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5028 [2020-10-28 09:05:30,916 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:05:30,916 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:05:30,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-28 09:05:30,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 104 [2020-10-28 09:05:30,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-28 09:05:30,917 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:05:31,680 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:05:31,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:05:31,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:05:31,684 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:05:31,685 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:05:31,685 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:05:31,685 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:05:31,685 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:05:31,685 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:05:31,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:05:31,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:05:31,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:05:31,685 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:05:31,712 INFO L134 CoverageAnalysis]: Checked inductivity of 3045 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 2610 trivial. 0 not checked. [2020-10-28 09:05:31,712 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2014236650] [2020-10-28 09:05:31,712 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:05:31,713 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-28 09:05:31,713 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768928332] [2020-10-28 09:05:31,713 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-28 09:05:31,713 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:05:31,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-28 09:05:31,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-28 09:05:31,714 INFO L87 Difference]: Start difference. First operand 235 states and 242 transitions. Second operand 33 states. [2020-10-28 09:05:32,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:05:32,422 INFO L93 Difference]: Finished difference Result 441 states and 461 transitions. [2020-10-28 09:05:32,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-28 09:05:32,422 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 230 [2020-10-28 09:05:32,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:05:32,424 INFO L225 Difference]: With dead ends: 441 [2020-10-28 09:05:32,424 INFO L226 Difference]: Without dead ends: 242 [2020-10-28 09:05:32,426 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-28 09:05:32,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2020-10-28 09:05:32,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 242. [2020-10-28 09:05:32,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 242 states. [2020-10-28 09:05:32,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 249 transitions. [2020-10-28 09:05:32,436 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 249 transitions. Word has length 230 [2020-10-28 09:05:32,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:05:32,436 INFO L481 AbstractCegarLoop]: Abstraction has 242 states and 249 transitions. [2020-10-28 09:05:32,436 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-28 09:05:32,436 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 249 transitions. [2020-10-28 09:05:32,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2020-10-28 09:05:32,438 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:05:32,438 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:05:32,438 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-28 09:05:32,438 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:05:32,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:05:32,439 INFO L82 PathProgramCache]: Analyzing trace with hash -555895194, now seen corresponding path program 30 times [2020-10-28 09:05:32,439 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:05:32,439 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1729773306] [2020-10-28 09:05:32,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:05:32,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:05:32,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:05:32,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:05:32,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:05:33,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:05:34,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:05:37,569 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:05:37,569 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 247 [2020-10-28 09:05:37,569 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 09:05:37,569 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5056 [2020-10-28 09:05:37,569 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:05:37,569 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:05:37,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-28 09:05:37,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:05:37,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-28 09:05:37,570 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:05:38,351 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:05:38,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:05:38,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:05:38,357 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:05:38,357 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:05:38,357 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:05:38,357 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:05:38,357 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:05:38,357 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:05:38,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:05:38,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:05:38,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:05:38,358 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:05:38,399 INFO L134 CoverageAnalysis]: Checked inductivity of 3255 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 2790 trivial. 0 not checked. [2020-10-28 09:05:38,399 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1729773306] [2020-10-28 09:05:38,400 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:05:38,400 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-28 09:05:38,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088748450] [2020-10-28 09:05:38,401 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-28 09:05:38,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:05:38,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-28 09:05:38,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-28 09:05:38,402 INFO L87 Difference]: Start difference. First operand 242 states and 249 transitions. Second operand 34 states. [2020-10-28 09:05:39,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:05:39,252 INFO L93 Difference]: Finished difference Result 454 states and 474 transitions. [2020-10-28 09:05:39,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-28 09:05:39,252 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 237 [2020-10-28 09:05:39,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:05:39,255 INFO L225 Difference]: With dead ends: 454 [2020-10-28 09:05:39,255 INFO L226 Difference]: Without dead ends: 249 [2020-10-28 09:05:39,256 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-28 09:05:39,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2020-10-28 09:05:39,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 249. [2020-10-28 09:05:39,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 249 states. [2020-10-28 09:05:39,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 256 transitions. [2020-10-28 09:05:39,266 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 256 transitions. Word has length 237 [2020-10-28 09:05:39,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:05:39,266 INFO L481 AbstractCegarLoop]: Abstraction has 249 states and 256 transitions. [2020-10-28 09:05:39,266 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-28 09:05:39,267 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 256 transitions. [2020-10-28 09:05:39,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2020-10-28 09:05:39,268 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:05:39,268 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:05:39,269 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-28 09:05:39,269 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:05:39,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:05:39,269 INFO L82 PathProgramCache]: Analyzing trace with hash 776880145, now seen corresponding path program 31 times [2020-10-28 09:05:39,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:05:39,270 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1405948862] [2020-10-28 09:05:39,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:05:39,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:05:39,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:05:39,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:05:39,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:05:39,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:05:42,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:05:44,409 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:05:44,409 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 254 [2020-10-28 09:05:44,409 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 09:05:44,409 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5053 [2020-10-28 09:05:44,409 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:05:44,409 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:05:44,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-28 09:05:44,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:05:44,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-28 09:05:44,410 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:05:45,248 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:05:45,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:05:45,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:05:45,253 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:05:45,253 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:05:45,253 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:05:45,253 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:05:45,253 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:05:45,253 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:05:45,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:05:45,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:05:45,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:05:45,254 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:05:45,284 INFO L134 CoverageAnalysis]: Checked inductivity of 3472 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 2976 trivial. 0 not checked. [2020-10-28 09:05:45,285 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1405948862] [2020-10-28 09:05:45,285 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:05:45,285 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-28 09:05:45,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387322158] [2020-10-28 09:05:45,285 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-28 09:05:45,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:05:45,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-28 09:05:45,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-28 09:05:45,287 INFO L87 Difference]: Start difference. First operand 249 states and 256 transitions. Second operand 35 states. [2020-10-28 09:05:46,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:05:46,106 INFO L93 Difference]: Finished difference Result 467 states and 487 transitions. [2020-10-28 09:05:46,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-28 09:05:46,107 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 244 [2020-10-28 09:05:46,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:05:46,110 INFO L225 Difference]: With dead ends: 467 [2020-10-28 09:05:46,110 INFO L226 Difference]: Without dead ends: 256 [2020-10-28 09:05:46,112 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-28 09:05:46,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2020-10-28 09:05:46,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 256. [2020-10-28 09:05:46,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 256 states. [2020-10-28 09:05:46,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 263 transitions. [2020-10-28 09:05:46,122 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 263 transitions. Word has length 244 [2020-10-28 09:05:46,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:05:46,122 INFO L481 AbstractCegarLoop]: Abstraction has 256 states and 263 transitions. [2020-10-28 09:05:46,122 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-28 09:05:46,122 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 263 transitions. [2020-10-28 09:05:46,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2020-10-28 09:05:46,124 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:05:46,124 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:05:46,125 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-28 09:05:46,125 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:05:46,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:05:46,125 INFO L82 PathProgramCache]: Analyzing trace with hash 200671238, now seen corresponding path program 32 times [2020-10-28 09:05:46,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:05:46,126 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2095586990] [2020-10-28 09:05:46,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:05:46,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:05:46,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:05:46,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:05:46,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:05:47,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:05:49,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:05:51,261 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:05:51,262 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 261 [2020-10-28 09:05:51,262 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 09:05:51,262 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5038 [2020-10-28 09:05:51,262 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:05:51,262 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:05:51,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-28 09:05:51,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 113 [2020-10-28 09:05:51,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-28 09:05:51,263 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:05:52,160 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:05:52,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:05:52,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:05:52,165 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:05:52,165 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:05:52,165 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:05:52,165 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:05:52,165 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:05:52,166 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:05:52,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:05:52,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:05:52,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:05:52,166 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:05:52,233 INFO L134 CoverageAnalysis]: Checked inductivity of 3696 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 3168 trivial. 0 not checked. [2020-10-28 09:05:52,234 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2095586990] [2020-10-28 09:05:52,234 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:05:52,234 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-28 09:05:52,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788411968] [2020-10-28 09:05:52,235 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-28 09:05:52,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:05:52,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-28 09:05:52,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-28 09:05:52,236 INFO L87 Difference]: Start difference. First operand 256 states and 263 transitions. Second operand 36 states. [2020-10-28 09:05:53,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:05:53,125 INFO L93 Difference]: Finished difference Result 480 states and 500 transitions. [2020-10-28 09:05:53,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-28 09:05:53,126 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 251 [2020-10-28 09:05:53,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:05:53,129 INFO L225 Difference]: With dead ends: 480 [2020-10-28 09:05:53,129 INFO L226 Difference]: Without dead ends: 263 [2020-10-28 09:05:53,130 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-28 09:05:53,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2020-10-28 09:05:53,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 263. [2020-10-28 09:05:53,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 263 states. [2020-10-28 09:05:53,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 270 transitions. [2020-10-28 09:05:53,140 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 270 transitions. Word has length 251 [2020-10-28 09:05:53,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:05:53,141 INFO L481 AbstractCegarLoop]: Abstraction has 263 states and 270 transitions. [2020-10-28 09:05:53,141 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-28 09:05:53,141 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 270 transitions. [2020-10-28 09:05:53,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2020-10-28 09:05:53,143 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:05:53,143 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 33, 33, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:05:53,143 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-28 09:05:53,143 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:05:53,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:05:53,144 INFO L82 PathProgramCache]: Analyzing trace with hash -1507868815, now seen corresponding path program 33 times [2020-10-28 09:05:53,144 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:05:53,144 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [107558162] [2020-10-28 09:05:53,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:05:53,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:05:53,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:05:53,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:05:53,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:05:54,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:05:56,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:05:58,248 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:05:58,248 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 268 [2020-10-28 09:05:58,248 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 09:05:58,248 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-28 09:05:58,249 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:05:58,249 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:05:58,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-28 09:05:58,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 116 [2020-10-28 09:05:58,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-28 09:05:58,249 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:05:59,201 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:05:59,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:05:59,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:05:59,206 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:05:59,207 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:05:59,207 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:05:59,207 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:05:59,207 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:05:59,207 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:05:59,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:05:59,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:05:59,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:05:59,208 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:05:59,244 INFO L134 CoverageAnalysis]: Checked inductivity of 3927 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 3366 trivial. 0 not checked. [2020-10-28 09:05:59,244 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [107558162] [2020-10-28 09:05:59,244 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:05:59,245 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-28 09:05:59,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916940387] [2020-10-28 09:05:59,245 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-28 09:05:59,245 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:05:59,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-28 09:05:59,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-28 09:05:59,247 INFO L87 Difference]: Start difference. First operand 263 states and 270 transitions. Second operand 37 states. [2020-10-28 09:06:00,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:06:00,186 INFO L93 Difference]: Finished difference Result 493 states and 513 transitions. [2020-10-28 09:06:00,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-28 09:06:00,187 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 258 [2020-10-28 09:06:00,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:06:00,189 INFO L225 Difference]: With dead ends: 493 [2020-10-28 09:06:00,189 INFO L226 Difference]: Without dead ends: 270 [2020-10-28 09:06:00,191 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-28 09:06:00,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2020-10-28 09:06:00,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 270. [2020-10-28 09:06:00,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 270 states. [2020-10-28 09:06:00,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 277 transitions. [2020-10-28 09:06:00,199 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 277 transitions. Word has length 258 [2020-10-28 09:06:00,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:06:00,200 INFO L481 AbstractCegarLoop]: Abstraction has 270 states and 277 transitions. [2020-10-28 09:06:00,200 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-28 09:06:00,200 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 277 transitions. [2020-10-28 09:06:00,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2020-10-28 09:06:00,201 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:06:00,202 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 34, 34, 34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:06:00,202 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-28 09:06:00,202 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:06:00,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:06:00,202 INFO L82 PathProgramCache]: Analyzing trace with hash -1735446106, now seen corresponding path program 34 times [2020-10-28 09:06:00,203 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:06:00,203 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [513515960] [2020-10-28 09:06:00,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:06:00,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:06:00,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:00,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:00,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:01,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:03,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:05,313 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:06:05,314 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 275 [2020-10-28 09:06:05,314 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 09:06:05,314 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5040 [2020-10-28 09:06:05,314 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:06:05,314 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:06:05,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-28 09:06:05,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 47 [2020-10-28 09:06:05,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-28 09:06:05,314 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:06:06,290 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:06:06,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:06:06,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:06,294 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:06:06,295 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:06:06,295 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:06:06,295 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:06:06,295 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:06:06,295 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:06:06,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:06:06,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:06:06,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:06:06,296 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:06:06,336 INFO L134 CoverageAnalysis]: Checked inductivity of 4165 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 3570 trivial. 0 not checked. [2020-10-28 09:06:06,336 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [513515960] [2020-10-28 09:06:06,336 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:06:06,336 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-28 09:06:06,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290797049] [2020-10-28 09:06:06,337 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-28 09:06:06,337 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:06:06,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-28 09:06:06,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-28 09:06:06,338 INFO L87 Difference]: Start difference. First operand 270 states and 277 transitions. Second operand 38 states. [2020-10-28 09:06:07,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:06:07,284 INFO L93 Difference]: Finished difference Result 506 states and 526 transitions. [2020-10-28 09:06:07,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-28 09:06:07,285 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 265 [2020-10-28 09:06:07,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:06:07,287 INFO L225 Difference]: With dead ends: 506 [2020-10-28 09:06:07,287 INFO L226 Difference]: Without dead ends: 277 [2020-10-28 09:06:07,289 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-28 09:06:07,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2020-10-28 09:06:07,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 277. [2020-10-28 09:06:07,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 277 states. [2020-10-28 09:06:07,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 284 transitions. [2020-10-28 09:06:07,299 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 284 transitions. Word has length 265 [2020-10-28 09:06:07,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:06:07,299 INFO L481 AbstractCegarLoop]: Abstraction has 277 states and 284 transitions. [2020-10-28 09:06:07,299 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-28 09:06:07,299 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 284 transitions. [2020-10-28 09:06:07,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 273 [2020-10-28 09:06:07,301 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:06:07,301 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 35, 35, 35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:06:07,302 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-28 09:06:07,302 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:06:07,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:06:07,302 INFO L82 PathProgramCache]: Analyzing trace with hash -1181559087, now seen corresponding path program 35 times [2020-10-28 09:06:07,302 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:06:07,303 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [911112724] [2020-10-28 09:06:07,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:06:07,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:06:07,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:07,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:07,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:08,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:11,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:12,413 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:06:12,413 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 282 [2020-10-28 09:06:12,413 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 09:06:12,413 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-28 09:06:12,413 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:06:12,413 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:06:12,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-28 09:06:12,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 122 [2020-10-28 09:06:12,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-28 09:06:12,414 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:06:13,470 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:06:13,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:06:13,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:13,474 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:06:13,475 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:06:13,475 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:06:13,475 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:06:13,475 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:06:13,475 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:06:13,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:06:13,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:06:13,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:06:13,475 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:06:13,512 INFO L134 CoverageAnalysis]: Checked inductivity of 4410 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 3780 trivial. 0 not checked. [2020-10-28 09:06:13,513 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [911112724] [2020-10-28 09:06:13,513 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:06:13,513 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-28 09:06:13,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552245587] [2020-10-28 09:06:13,514 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-28 09:06:13,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:06:13,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-28 09:06:13,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-28 09:06:13,515 INFO L87 Difference]: Start difference. First operand 277 states and 284 transitions. Second operand 39 states. [2020-10-28 09:06:14,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:06:14,349 INFO L93 Difference]: Finished difference Result 519 states and 539 transitions. [2020-10-28 09:06:14,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-28 09:06:14,350 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 272 [2020-10-28 09:06:14,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:06:14,352 INFO L225 Difference]: With dead ends: 519 [2020-10-28 09:06:14,352 INFO L226 Difference]: Without dead ends: 284 [2020-10-28 09:06:14,354 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-28 09:06:14,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2020-10-28 09:06:14,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 284. [2020-10-28 09:06:14,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 284 states. [2020-10-28 09:06:14,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 291 transitions. [2020-10-28 09:06:14,362 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 291 transitions. Word has length 272 [2020-10-28 09:06:14,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:06:14,363 INFO L481 AbstractCegarLoop]: Abstraction has 284 states and 291 transitions. [2020-10-28 09:06:14,363 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-28 09:06:14,363 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 291 transitions. [2020-10-28 09:06:14,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 280 [2020-10-28 09:06:14,365 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:06:14,365 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 36, 36, 36, 36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:06:14,365 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-28 09:06:14,365 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:06:14,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:06:14,366 INFO L82 PathProgramCache]: Analyzing trace with hash 1937460038, now seen corresponding path program 36 times [2020-10-28 09:06:14,366 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:06:14,366 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1798910135] [2020-10-28 09:06:14,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:06:14,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:06:14,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:14,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:15,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:15,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:18,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:19,486 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:06:19,486 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 289 [2020-10-28 09:06:19,486 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 09:06:19,486 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5020 [2020-10-28 09:06:19,486 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:06:19,486 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:06:19,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-28 09:06:19,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 163 [2020-10-28 09:06:19,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-28 09:06:19,487 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:06:20,612 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:06:20,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:06:20,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:20,616 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:06:20,616 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:06:20,616 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:06:20,617 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:06:20,617 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:06:20,617 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:06:20,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:06:20,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:06:20,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:06:20,617 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:06:20,654 INFO L134 CoverageAnalysis]: Checked inductivity of 4662 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 3996 trivial. 0 not checked. [2020-10-28 09:06:20,654 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1798910135] [2020-10-28 09:06:20,654 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:06:20,655 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-28 09:06:20,655 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131216562] [2020-10-28 09:06:20,655 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-28 09:06:20,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:06:20,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-28 09:06:20,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-28 09:06:20,657 INFO L87 Difference]: Start difference. First operand 284 states and 291 transitions. Second operand 40 states. [2020-10-28 09:06:21,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:06:21,485 INFO L93 Difference]: Finished difference Result 532 states and 552 transitions. [2020-10-28 09:06:21,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-28 09:06:21,485 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 279 [2020-10-28 09:06:21,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:06:21,487 INFO L225 Difference]: With dead ends: 532 [2020-10-28 09:06:21,487 INFO L226 Difference]: Without dead ends: 291 [2020-10-28 09:06:21,489 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-28 09:06:21,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2020-10-28 09:06:21,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 291. [2020-10-28 09:06:21,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 291 states. [2020-10-28 09:06:21,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 298 transitions. [2020-10-28 09:06:21,496 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 298 transitions. Word has length 279 [2020-10-28 09:06:21,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:06:21,496 INFO L481 AbstractCegarLoop]: Abstraction has 291 states and 298 transitions. [2020-10-28 09:06:21,496 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-28 09:06:21,497 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 298 transitions. [2020-10-28 09:06:21,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 287 [2020-10-28 09:06:21,498 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:06:21,499 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 37, 37, 37, 37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:06:21,499 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-28 09:06:21,499 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:06:21,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:06:21,499 INFO L82 PathProgramCache]: Analyzing trace with hash -1340766671, now seen corresponding path program 37 times [2020-10-28 09:06:21,500 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:06:21,500 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1485259772] [2020-10-28 09:06:21,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:06:21,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:06:21,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:21,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:22,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:22,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:22,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking...