/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-fpi/brs1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 09:10:40,036 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 09:10:40,039 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 09:10:40,079 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 09:10:40,080 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 09:10:40,081 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 09:10:40,083 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 09:10:40,086 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 09:10:40,088 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 09:10:40,089 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 09:10:40,090 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 09:10:40,092 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 09:10:40,093 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 09:10:40,094 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 09:10:40,096 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 09:10:40,097 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 09:10:40,098 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 09:10:40,100 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 09:10:40,102 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 09:10:40,105 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 09:10:40,107 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 09:10:40,109 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 09:10:40,110 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 09:10:40,111 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 09:10:40,115 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 09:10:40,131 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 09:10:40,132 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 09:10:40,133 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 09:10:40,134 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 09:10:40,135 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 09:10:40,136 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 09:10:40,137 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 09:10:40,138 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 09:10:40,139 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 09:10:40,141 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 09:10:40,141 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 09:10:40,142 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 09:10:40,143 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 09:10:40,143 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 09:10:40,144 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 09:10:40,146 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 09:10:40,147 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 09:10:40,200 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 09:10:40,200 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 09:10:40,206 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 09:10:40,207 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 09:10:40,207 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 09:10:40,207 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 09:10:40,207 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 09:10:40,208 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 09:10:40,208 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 09:10:40,209 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 09:10:40,210 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 09:10:40,210 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 09:10:40,210 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 09:10:40,210 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 09:10:40,211 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 09:10:40,211 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 09:10:40,211 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 09:10:40,211 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 09:10:40,212 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 09:10:40,212 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 09:10:40,212 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 09:10:40,212 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 09:10:40,213 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 09:10:40,213 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 09:10:40,214 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 09:10:40,214 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 09:10:40,214 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 09:10:40,214 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 09:10:40,214 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 09:10:40,215 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 09:10:40,658 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 09:10:40,695 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 09:10:40,698 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 09:10:40,700 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 09:10:40,701 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 09:10:40,702 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/brs1.c [2020-10-28 09:10:40,789 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f6a576af0/b7a00e5fe7594914b1db7a3d3510dc7e/FLAG016b7828f [2020-10-28 09:10:41,497 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 09:10:41,498 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-fpi/brs1.c [2020-10-28 09:10:41,506 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f6a576af0/b7a00e5fe7594914b1db7a3d3510dc7e/FLAG016b7828f [2020-10-28 09:10:41,847 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f6a576af0/b7a00e5fe7594914b1db7a3d3510dc7e [2020-10-28 09:10:41,851 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 09:10:41,858 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 09:10:41,860 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 09:10:41,860 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 09:10:41,864 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 09:10:41,865 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 09:10:41" (1/1) ... [2020-10-28 09:10:41,868 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7015976b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:10:41, skipping insertion in model container [2020-10-28 09:10:41,868 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 09:10:41" (1/1) ... [2020-10-28 09:10:41,876 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 09:10:41,891 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 09:10:42,066 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 09:10:42,075 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 09:10:42,097 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 09:10:42,118 INFO L208 MainTranslator]: Completed translation [2020-10-28 09:10:42,119 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:10:42 WrapperNode [2020-10-28 09:10:42,119 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 09:10:42,121 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 09:10:42,121 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 09:10:42,121 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 09:10:42,135 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:10:42" (1/1) ... [2020-10-28 09:10:42,135 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:10:42" (1/1) ... [2020-10-28 09:10:42,143 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:10:42" (1/1) ... [2020-10-28 09:10:42,144 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:10:42" (1/1) ... [2020-10-28 09:10:42,154 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:10:42" (1/1) ... [2020-10-28 09:10:42,159 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:10:42" (1/1) ... [2020-10-28 09:10:42,161 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:10:42" (1/1) ... [2020-10-28 09:10:42,164 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 09:10:42,165 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 09:10:42,165 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 09:10:42,165 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 09:10:42,166 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:10:42" (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 09:10:42,248 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 09:10:42,248 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 09:10:42,248 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 09:10:42,248 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-28 09:10:42,248 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-28 09:10:42,249 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 09:10:42,249 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 09:10:42,249 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 09:10:42,249 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 09:10:42,249 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 09:10:42,250 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-28 09:10:42,250 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-28 09:10:42,250 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-28 09:10:42,250 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-28 09:10:42,250 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 09:10:42,250 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-28 09:10:42,250 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 09:10:42,251 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 09:10:42,251 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 09:10:42,251 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 09:10:42,251 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 09:10:42,251 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 09:10:42,817 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 09:10:42,817 INFO L298 CfgBuilder]: Removed 2 assume(true) statements. [2020-10-28 09:10:42,821 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 09:10:42 BoogieIcfgContainer [2020-10-28 09:10:42,821 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 09:10:42,825 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 09:10:42,825 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 09:10:42,829 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 09:10:42,830 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 09:10:41" (1/3) ... [2020-10-28 09:10:42,831 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f34b532 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 09:10:42, skipping insertion in model container [2020-10-28 09:10:42,832 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:10:42" (2/3) ... [2020-10-28 09:10:42,833 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f34b532 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 09:10:42, skipping insertion in model container [2020-10-28 09:10:42,833 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 09:10:42" (3/3) ... [2020-10-28 09:10:42,836 INFO L111 eAbstractionObserver]: Analyzing ICFG brs1.c [2020-10-28 09:10:42,851 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 09:10:42,859 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 09:10:42,875 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 09:10:42,918 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 09:10:42,918 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 09:10:42,918 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 09:10:42,919 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 09:10:42,919 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 09:10:42,919 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 09:10:42,919 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 09:10:42,919 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 09:10:42,943 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states. [2020-10-28 09:10:42,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-28 09:10:42,951 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:10:42,951 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] [2020-10-28 09:10:42,952 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:10:42,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:10:42,967 INFO L82 PathProgramCache]: Analyzing trace with hash 288317380, now seen corresponding path program 1 times [2020-10-28 09:10:42,978 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:10:42,979 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [297830167] [2020-10-28 09:10:42,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:10:43,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:10:43,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:43,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:43,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:43,548 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:10:43,548 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-28 09:10:43,548 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:10:43,549 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 347 [2020-10-28 09:10:43,554 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:10:43,555 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:10:43,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:10:43,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-28 09:10:43,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:10:43,556 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-10-28 09:10:43,642 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:10:43,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:10:43,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:43,663 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:10:43,664 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:10:43,664 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:10:43,664 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-28 09:10:43,665 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:10:43,665 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:10:43,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:10:43,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:10:43,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:10:43,666 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:10:43,675 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:10:43,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:10:43,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:43,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:43,683 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:10:43,683 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:10:43,684 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:10:43,684 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 09:10:43,684 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:10:43,684 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:10:43,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:10:43,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:10:43,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:10:43,685 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:10:43,693 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 09:10:43,694 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [297830167] [2020-10-28 09:10:43,696 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 09:10:43,697 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-28 09:10:43,698 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625209234] [2020-10-28 09:10:43,705 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-28 09:10:43,706 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:10:43,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-28 09:10:43,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-28 09:10:43,727 INFO L87 Difference]: Start difference. First operand 37 states. Second operand 3 states. [2020-10-28 09:10:43,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:10:43,867 INFO L93 Difference]: Finished difference Result 61 states and 77 transitions. [2020-10-28 09:10:43,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-28 09:10:43,869 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-10-28 09:10:43,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:10:43,877 INFO L225 Difference]: With dead ends: 61 [2020-10-28 09:10:43,877 INFO L226 Difference]: Without dead ends: 27 [2020-10-28 09:10:43,881 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 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 09:10:43,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-28 09:10:43,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-10-28 09:10:43,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-28 09:10:43,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2020-10-28 09:10:43,928 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 22 [2020-10-28 09:10:43,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:10:43,928 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2020-10-28 09:10:43,928 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-28 09:10:43,929 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2020-10-28 09:10:43,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-28 09:10:43,930 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:10:43,930 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] [2020-10-28 09:10:43,930 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 09:10:43,931 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:10:43,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:10:43,931 INFO L82 PathProgramCache]: Analyzing trace with hash 1231035376, now seen corresponding path program 1 times [2020-10-28 09:10:43,932 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:10:43,932 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [233653373] [2020-10-28 09:10:43,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:10:43,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:10:43,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:44,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:44,363 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:10:44,364 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-28 09:10:44,364 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:10:44,364 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 408 [2020-10-28 09:10:44,364 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:10:44,365 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:10:44,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 09:10:44,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 09:10:44,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-28 09:10:44,365 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:10:44,430 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:10:44,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:10:44,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:44,443 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:10:44,444 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:10:44,444 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:10:44,444 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 09:10:44,444 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:10:44,445 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:10:44,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:10:44,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:10:44,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:10:44,445 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:10:44,450 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:10:44,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:10:44,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:44,459 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:10:44,460 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:10:44,460 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:10:44,460 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 09:10:44,460 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:10:44,461 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:10:44,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 09:10:44,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:10:44,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 09:10:44,461 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:10:44,466 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 09:10:44,466 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [233653373] [2020-10-28 09:10:44,466 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 09:10:44,466 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 09:10:44,467 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886343865] [2020-10-28 09:10:44,468 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 09:10:44,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:10:44,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 09:10:44,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 09:10:44,470 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand 5 states. [2020-10-28 09:10:44,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:10:44,622 INFO L93 Difference]: Finished difference Result 40 states and 45 transitions. [2020-10-28 09:10:44,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 09:10:44,622 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 22 [2020-10-28 09:10:44,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:10:44,624 INFO L225 Difference]: With dead ends: 40 [2020-10-28 09:10:44,624 INFO L226 Difference]: Without dead ends: 29 [2020-10-28 09:10:44,625 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 09:10:44,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-28 09:10:44,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-10-28 09:10:44,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-28 09:10:44,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2020-10-28 09:10:44,635 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 22 [2020-10-28 09:10:44,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:10:44,635 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2020-10-28 09:10:44,635 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 09:10:44,635 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2020-10-28 09:10:44,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-28 09:10:44,636 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:10:44,637 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] [2020-10-28 09:10:44,637 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 09:10:44,637 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:10:44,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:10:44,638 INFO L82 PathProgramCache]: Analyzing trace with hash -1214934215, now seen corresponding path program 1 times [2020-10-28 09:10:44,638 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:10:44,638 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [865585074] [2020-10-28 09:10:44,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:10:44,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:10:44,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:44,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:44,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:45,448 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:10:45,449 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-28 09:10:45,449 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:10:45,449 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 794 [2020-10-28 09:10:45,449 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:10:45,449 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:10:45,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 09:10:45,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-28 09:10:45,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-28 09:10:45,450 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:10:45,500 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:10:45,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:10:45,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:45,510 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:10:45,510 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:10:45,510 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:10:45,510 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 09:10:45,510 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:10:45,511 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:10:45,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:10:45,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:10:45,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:10:45,511 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:10:45,516 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:10:45,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:10:45,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:45,519 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:10:45,519 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:10:45,520 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:10:45,520 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:10:45,520 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:10:45,520 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:10:45,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:10:45,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:10:45,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:10:45,521 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:10:45,524 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 09:10:45,524 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [865585074] [2020-10-28 09:10:45,525 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 09:10:45,525 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 09:10:45,525 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917759719] [2020-10-28 09:10:45,526 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 09:10:45,526 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:10:45,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 09:10:45,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 09:10:45,527 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand 4 states. [2020-10-28 09:10:45,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:10:45,626 INFO L93 Difference]: Finished difference Result 43 states and 47 transitions. [2020-10-28 09:10:45,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 09:10:45,627 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 28 [2020-10-28 09:10:45,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:10:45,628 INFO L225 Difference]: With dead ends: 43 [2020-10-28 09:10:45,628 INFO L226 Difference]: Without dead ends: 33 [2020-10-28 09:10:45,629 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 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 09:10:45,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-10-28 09:10:45,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 30. [2020-10-28 09:10:45,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-28 09:10:45,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2020-10-28 09:10:45,637 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 28 [2020-10-28 09:10:45,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:10:45,637 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2020-10-28 09:10:45,638 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 09:10:45,638 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2020-10-28 09:10:45,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-28 09:10:45,639 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:10:45,639 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] [2020-10-28 09:10:45,639 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 09:10:45,639 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:10:45,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:10:45,640 INFO L82 PathProgramCache]: Analyzing trace with hash -1894992585, now seen corresponding path program 1 times [2020-10-28 09:10:45,640 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:10:45,640 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [112771568] [2020-10-28 09:10:45,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:10:45,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:10:45,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:45,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:45,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:46,162 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:10:46,162 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-28 09:10:46,162 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:10:46,162 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 507 [2020-10-28 09:10:46,162 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:10:46,163 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:10:46,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 09:10:46,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 09:10:46,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-28 09:10:46,165 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-28 09:10:46,263 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:10:46,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:10:46,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:46,275 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:10:46,275 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:10:46,275 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:10:46,276 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 09:10:46,276 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:10:46,276 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:10:46,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:10:46,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:10:46,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:10:46,277 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:10:46,280 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:10:46,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:10:46,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:46,300 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:10:46,301 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:10:46,301 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:10:46,301 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 09:10:46,301 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:10:46,302 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:10:46,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 09:10:46,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:10:46,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 09:10:46,302 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:10:46,307 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 09:10:46,308 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [112771568] [2020-10-28 09:10:46,308 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 09:10:46,308 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-28 09:10:46,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561331157] [2020-10-28 09:10:46,310 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 09:10:46,310 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:10:46,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 09:10:46,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-28 09:10:46,311 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand 8 states. [2020-10-28 09:10:46,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:10:46,609 INFO L93 Difference]: Finished difference Result 40 states and 43 transitions. [2020-10-28 09:10:46,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 09:10:46,610 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 28 [2020-10-28 09:10:46,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:10:46,611 INFO L225 Difference]: With dead ends: 40 [2020-10-28 09:10:46,611 INFO L226 Difference]: Without dead ends: 33 [2020-10-28 09:10:46,612 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2020-10-28 09:10:46,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-10-28 09:10:46,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2020-10-28 09:10:46,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-28 09:10:46,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2020-10-28 09:10:46,624 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 28 [2020-10-28 09:10:46,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:10:46,624 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2020-10-28 09:10:46,624 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 09:10:46,625 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2020-10-28 09:10:46,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-28 09:10:46,627 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:10:46,627 INFO L422 BasicCegarLoop]: trace histogram [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 09:10:46,627 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 09:10:46,628 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:10:46,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:10:46,628 INFO L82 PathProgramCache]: Analyzing trace with hash 427046459, now seen corresponding path program 1 times [2020-10-28 09:10:46,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:10:46,630 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1967496235] [2020-10-28 09:10:46,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:10:46,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:10:46,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:46,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:46,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:46,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:46,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:47,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:47,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:47,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:48,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:49,310 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:10:49,311 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-28 09:10:49,311 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-28 09:10:49,311 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2656 [2020-10-28 09:10:49,311 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:10:49,312 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:10:49,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 09:10:49,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 09:10:49,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-28 09:10:49,312 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:10:49,530 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:10:49,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:10:49,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:49,543 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:10:49,547 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:10:49,547 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:10:49,547 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 09:10:49,548 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:10:49,548 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:10:49,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:10:49,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:10:49,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:10:49,548 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:10:49,552 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:10:49,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:10:49,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:49,561 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:10:49,561 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:10:49,561 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:10:49,561 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:10:49,561 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:10:49,562 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:10:49,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 09:10:49,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:10:49,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 09:10:49,562 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:10:49,567 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 09:10:49,567 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1967496235] [2020-10-28 09:10:49,568 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:10:49,568 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-28 09:10:49,568 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761398223] [2020-10-28 09:10:49,569 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 09:10:49,570 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:10:49,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 09:10:49,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-28 09:10:49,572 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand 9 states. [2020-10-28 09:10:49,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:10:49,769 INFO L93 Difference]: Finished difference Result 54 states and 59 transitions. [2020-10-28 09:10:49,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 09:10:49,769 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 31 [2020-10-28 09:10:49,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:10:49,770 INFO L225 Difference]: With dead ends: 54 [2020-10-28 09:10:49,770 INFO L226 Difference]: Without dead ends: 39 [2020-10-28 09:10:49,771 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-10-28 09:10:49,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-28 09:10:49,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 35. [2020-10-28 09:10:49,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-28 09:10:49,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2020-10-28 09:10:49,779 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 31 [2020-10-28 09:10:49,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:10:49,779 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2020-10-28 09:10:49,780 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 09:10:49,780 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2020-10-28 09:10:49,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-28 09:10:49,781 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:10:49,781 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-28 09:10:49,781 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 09:10:49,781 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:10:49,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:10:49,782 INFO L82 PathProgramCache]: Analyzing trace with hash 358433618, now seen corresponding path program 2 times [2020-10-28 09:10:49,782 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:10:49,782 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1471734018] [2020-10-28 09:10:49,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:10:49,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:10:49,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:49,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:50,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:50,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:50,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:50,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:50,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:50,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:51,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:51,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:51,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:51,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:51,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:52,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:52,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:53,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:54,804 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:10:54,805 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-28 09:10:54,805 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-28 09:10:54,805 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-28 09:10:54,806 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:10:54,806 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:10:54,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 09:10:54,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 09:10:54,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-28 09:10:54,807 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:10:55,079 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:10:55,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:10:55,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:55,115 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:10:55,116 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:10:55,116 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:10:55,116 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 09:10:55,117 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:10:55,117 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:10:55,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:10:55,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:10:55,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:10:55,118 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:10:55,123 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:10:55,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:10:55,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:55,129 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:10:55,129 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:10:55,130 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:10:55,130 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:10:55,130 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:10:55,130 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:10:55,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 09:10:55,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:10:55,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 09:10:55,131 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:10:55,140 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 09:10:55,140 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1471734018] [2020-10-28 09:10:55,142 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:10:55,142 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-28 09:10:55,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494444999] [2020-10-28 09:10:55,143 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-28 09:10:55,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:10:55,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-28 09:10:55,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2020-10-28 09:10:55,144 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand 13 states. [2020-10-28 09:10:55,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:10:55,856 INFO L93 Difference]: Finished difference Result 57 states and 63 transitions. [2020-10-28 09:10:55,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-28 09:10:55,857 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 34 [2020-10-28 09:10:55,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:10:55,858 INFO L225 Difference]: With dead ends: 57 [2020-10-28 09:10:55,859 INFO L226 Difference]: Without dead ends: 41 [2020-10-28 09:10:55,862 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=97, Invalid=409, Unknown=0, NotChecked=0, Total=506 [2020-10-28 09:10:55,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-28 09:10:55,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 38. [2020-10-28 09:10:55,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-28 09:10:55,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2020-10-28 09:10:55,876 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 34 [2020-10-28 09:10:55,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:10:55,876 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2020-10-28 09:10:55,876 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-28 09:10:55,877 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2020-10-28 09:10:55,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-28 09:10:55,879 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:10:55,880 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 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] [2020-10-28 09:10:55,880 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 09:10:55,880 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:10:55,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:10:55,881 INFO L82 PathProgramCache]: Analyzing trace with hash 1908223552, now seen corresponding path program 3 times [2020-10-28 09:10:55,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:10:55,882 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [978960264] [2020-10-28 09:10:55,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:10:55,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:10:55,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:55,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:56,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:56,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:56,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:56,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:56,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:57,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:57,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:58,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:59,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:00,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:00,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:00,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:00,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:00,912 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:11:00,913 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-28 09:11:00,913 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-28 09:11:00,913 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-28 09:11:00,913 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:11:00,913 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:11:00,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 09:11:00,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 09:11:00,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-28 09:11:00,914 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:11:01,143 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:11:01,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:11:01,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:01,154 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:11:01,154 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:11:01,154 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:11:01,155 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 09:11:01,155 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:11:01,155 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:11:01,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:11:01,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:11:01,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:11:01,156 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:11:01,159 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:11:01,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:11:01,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:01,168 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:11:01,169 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:11:01,169 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:11:01,169 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 09:11:01,169 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:11:01,170 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:11:01,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 09:11:01,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:11:01,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 09:11:01,170 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:11:01,177 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-28 09:11:01,177 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [978960264] [2020-10-28 09:11:01,178 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:11:01,178 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-28 09:11:01,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882291371] [2020-10-28 09:11:01,178 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-28 09:11:01,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:11:01,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-28 09:11:01,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2020-10-28 09:11:01,180 INFO L87 Difference]: Start difference. First operand 38 states and 40 transitions. Second operand 13 states. [2020-10-28 09:11:01,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:11:01,705 INFO L93 Difference]: Finished difference Result 63 states and 68 transitions. [2020-10-28 09:11:01,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-28 09:11:01,705 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 37 [2020-10-28 09:11:01,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:11:01,706 INFO L225 Difference]: With dead ends: 63 [2020-10-28 09:11:01,706 INFO L226 Difference]: Without dead ends: 45 [2020-10-28 09:11:01,707 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=161, Invalid=439, Unknown=0, NotChecked=0, Total=600 [2020-10-28 09:11:01,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-10-28 09:11:01,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 41. [2020-10-28 09:11:01,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-28 09:11:01,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2020-10-28 09:11:01,718 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 37 [2020-10-28 09:11:01,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:11:01,719 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2020-10-28 09:11:01,719 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-28 09:11:01,719 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2020-10-28 09:11:01,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-28 09:11:01,722 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:11:01,722 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 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 09:11:01,722 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 09:11:01,722 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:11:01,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:11:01,723 INFO L82 PathProgramCache]: Analyzing trace with hash -1936208361, now seen corresponding path program 4 times [2020-10-28 09:11:01,723 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:11:01,723 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [15283463] [2020-10-28 09:11:01,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:11:01,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:11:01,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:01,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:02,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:02,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:02,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:03,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:03,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:03,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:03,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:04,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:04,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:04,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:05,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:05,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:05,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:05,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:06,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:06,771 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:11:06,772 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-28 09:11:06,772 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 17 [2020-10-28 09:11:06,772 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-28 09:11:06,772 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:11:06,772 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:11:06,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-28 09:11:06,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 09:11:06,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-28 09:11:06,773 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:11:07,202 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 43 [2020-10-28 09:11:07,358 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 40 [2020-10-28 09:11:07,492 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 36 [2020-10-28 09:11:07,703 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 38 [2020-10-28 09:11:07,968 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:11:07,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:11:07,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:07,987 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:11:07,987 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:11:07,987 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:11:07,987 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-28 09:11:07,988 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:11:07,988 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:11:07,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:11:07,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:11:07,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:11:07,988 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:11:07,992 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:11:07,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:11:07,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:07,997 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:11:07,997 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:11:07,997 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:11:07,998 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:11:07,998 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:11:07,998 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:11:07,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 09:11:07,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:11:07,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 09:11:07,999 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:11:08,013 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 19 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-28 09:11:08,014 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [15283463] [2020-10-28 09:11:08,014 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:11:08,014 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-28 09:11:08,014 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162438424] [2020-10-28 09:11:08,015 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-28 09:11:08,015 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:11:08,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-28 09:11:08,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2020-10-28 09:11:08,016 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand 20 states. [2020-10-28 09:11:08,383 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 53 [2020-10-28 09:11:08,951 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 50 [2020-10-28 09:11:09,338 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 59 [2020-10-28 09:11:09,641 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 68 [2020-10-28 09:11:09,973 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 50 [2020-10-28 09:11:10,270 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 59 [2020-10-28 09:11:10,675 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 61 [2020-10-28 09:11:11,079 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 58 [2020-10-28 09:11:11,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:11:11,147 INFO L93 Difference]: Finished difference Result 56 states and 59 transitions. [2020-10-28 09:11:11,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-28 09:11:11,149 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 40 [2020-10-28 09:11:11,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:11:11,150 INFO L225 Difference]: With dead ends: 56 [2020-10-28 09:11:11,150 INFO L226 Difference]: Without dead ends: 49 [2020-10-28 09:11:11,151 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 377 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=275, Invalid=1447, Unknown=0, NotChecked=0, Total=1722 [2020-10-28 09:11:11,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-28 09:11:11,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 47. [2020-10-28 09:11:11,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-28 09:11:11,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 50 transitions. [2020-10-28 09:11:11,160 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 50 transitions. Word has length 40 [2020-10-28 09:11:11,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:11:11,161 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 50 transitions. [2020-10-28 09:11:11,161 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-28 09:11:11,161 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 50 transitions. [2020-10-28 09:11:11,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-28 09:11:11,161 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:11:11,162 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 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] [2020-10-28 09:11:11,162 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 09:11:11,162 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:11:11,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:11:11,163 INFO L82 PathProgramCache]: Analyzing trace with hash 928510299, now seen corresponding path program 5 times [2020-10-28 09:11:11,163 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:11:11,163 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1685111884] [2020-10-28 09:11:11,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:11:11,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:11:11,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:11,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:11,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:11,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:11,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:11,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:11,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:12,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:15,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:16,195 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:11:16,196 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-28 09:11:16,196 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-28 09:11:16,196 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-28 09:11:16,196 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:11:16,196 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:11:16,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-28 09:11:16,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 09:11:16,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-28 09:11:16,197 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:11:16,533 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:11:16,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:11:16,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:16,540 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:11:16,541 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:11:16,541 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:11:16,541 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 09:11:16,541 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:11:16,541 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:11:16,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:11:16,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:11:16,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:11:16,542 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:11:16,545 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:11:16,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:11:16,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:16,549 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:11:16,550 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:11:16,550 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:11:16,550 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:11:16,550 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:11:16,550 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:11:16,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 09:11:16,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:11:16,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 09:11:16,551 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:11:16,559 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-28 09:11:16,560 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1685111884] [2020-10-28 09:11:16,561 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:11:16,561 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-28 09:11:16,561 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276684578] [2020-10-28 09:11:16,563 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-28 09:11:16,563 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:11:16,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-28 09:11:16,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2020-10-28 09:11:16,564 INFO L87 Difference]: Start difference. First operand 47 states and 50 transitions. Second operand 16 states. [2020-10-28 09:11:17,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:11:17,536 INFO L93 Difference]: Finished difference Result 95 states and 105 transitions. [2020-10-28 09:11:17,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-28 09:11:17,537 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 43 [2020-10-28 09:11:17,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:11:17,539 INFO L225 Difference]: With dead ends: 95 [2020-10-28 09:11:17,540 INFO L226 Difference]: Without dead ends: 88 [2020-10-28 09:11:17,541 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=249, Invalid=807, Unknown=0, NotChecked=0, Total=1056 [2020-10-28 09:11:17,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-28 09:11:17,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 67. [2020-10-28 09:11:17,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-28 09:11:17,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 74 transitions. [2020-10-28 09:11:17,555 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 74 transitions. Word has length 43 [2020-10-28 09:11:17,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:11:17,555 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 74 transitions. [2020-10-28 09:11:17,555 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-28 09:11:17,556 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 74 transitions. [2020-10-28 09:11:17,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-28 09:11:17,556 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:11:17,557 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 2, 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 09:11:17,557 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 09:11:17,557 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:11:17,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:11:17,558 INFO L82 PathProgramCache]: Analyzing trace with hash -253164779, now seen corresponding path program 6 times [2020-10-28 09:11:17,558 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:11:17,558 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1099064519] [2020-10-28 09:11:17,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:11:17,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:11:17,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:17,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:17,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:17,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:18,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:18,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:18,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:18,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:18,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:19,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:20,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:20,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:20,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:20,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:21,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:21,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:21,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:21,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:22,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:22,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:22,571 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:11:22,571 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-28 09:11:22,571 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 20 [2020-10-28 09:11:22,572 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-28 09:11:22,572 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:11:22,572 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:11:22,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 09:11:22,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-28 09:11:22,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-28 09:11:22,572 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:11:22,645 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:11:22,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:11:22,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:22,654 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:11:22,655 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:11:22,655 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:11:22,655 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 09:11:22,655 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:11:22,655 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:11:22,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:11:22,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:11:22,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:11:22,656 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:11:22,659 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:11:22,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:11:22,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:22,661 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:11:22,662 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:11:22,662 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:11:22,662 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:11:22,662 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:11:22,662 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:11:22,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:11:22,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:11:22,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:11:22,663 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:11:22,667 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-10-28 09:11:22,667 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1099064519] [2020-10-28 09:11:22,668 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 09:11:22,668 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 09:11:22,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857238961] [2020-10-28 09:11:22,668 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 09:11:22,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:11:22,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 09:11:22,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-28 09:11:22,670 INFO L87 Difference]: Start difference. First operand 67 states and 74 transitions. Second operand 6 states. [2020-10-28 09:11:22,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:11:22,799 INFO L93 Difference]: Finished difference Result 83 states and 92 transitions. [2020-10-28 09:11:22,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 09:11:22,799 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 46 [2020-10-28 09:11:22,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:11:22,800 INFO L225 Difference]: With dead ends: 83 [2020-10-28 09:11:22,800 INFO L226 Difference]: Without dead ends: 47 [2020-10-28 09:11:22,801 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 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 09:11:22,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-28 09:11:22,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2020-10-28 09:11:22,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-28 09:11:22,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2020-10-28 09:11:22,809 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 46 [2020-10-28 09:11:22,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:11:22,810 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2020-10-28 09:11:22,810 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 09:11:22,810 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2020-10-28 09:11:22,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-28 09:11:22,811 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:11:22,811 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 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 09:11:22,811 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 09:11:22,811 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:11:22,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:11:22,811 INFO L82 PathProgramCache]: Analyzing trace with hash -1294265358, now seen corresponding path program 7 times [2020-10-28 09:11:22,812 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:11:22,812 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1748223144] [2020-10-28 09:11:22,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:11:22,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:11:22,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:22,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:23,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:23,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:24,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:24,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:24,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:25,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:25,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:26,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:26,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:27,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:27,830 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:11:27,831 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-28 09:11:27,831 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-28 09:11:27,831 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-28 09:11:27,831 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:11:27,831 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:11:27,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-28 09:11:27,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 09:11:27,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-28 09:11:27,832 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:11:28,649 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 32 [2020-10-28 09:11:28,888 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 34 [2020-10-28 09:11:29,173 WARN L193 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 35 [2020-10-28 09:11:29,685 WARN L193 SmtUtils]: Spent 361.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 55 [2020-10-28 09:11:30,073 WARN L193 SmtUtils]: Spent 333.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 53 [2020-10-28 09:11:30,565 WARN L193 SmtUtils]: Spent 451.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 63 [2020-10-28 09:11:30,904 WARN L193 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 49 [2020-10-28 09:11:31,070 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 31 [2020-10-28 09:11:31,243 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 30 [2020-10-28 09:11:31,499 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:11:31,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:11:31,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:31,509 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:11:31,509 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:11:31,509 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:11:31,510 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 09:11:31,510 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:11:31,510 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:11:31,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:11:31,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:11:31,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:11:31,511 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:11:31,514 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:11:31,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:11:31,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:31,518 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:11:31,518 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:11:31,519 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:11:31,519 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:11:31,519 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:11:31,519 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:11:31,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 09:11:31,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:11:31,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 09:11:31,529 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 9 [2020-10-28 09:11:31,559 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 13 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 09:11:31,559 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1748223144] [2020-10-28 09:11:31,559 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:11:31,560 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-28 09:11:31,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817380184] [2020-10-28 09:11:31,560 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-28 09:11:31,561 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:11:31,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-28 09:11:31,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2020-10-28 09:11:31,562 INFO L87 Difference]: Start difference. First operand 47 states and 48 transitions. Second operand 26 states. [2020-10-28 09:11:31,968 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 57 [2020-10-28 09:11:33,220 WARN L193 SmtUtils]: Spent 453.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 79 [2020-10-28 09:11:33,711 WARN L193 SmtUtils]: Spent 431.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 61 [2020-10-28 09:11:34,189 WARN L193 SmtUtils]: Spent 364.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 84 [2020-10-28 09:11:34,513 WARN L193 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 74 [2020-10-28 09:11:35,002 WARN L193 SmtUtils]: Spent 413.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 95 [2020-10-28 09:11:35,354 WARN L193 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 72 [2020-10-28 09:11:35,756 WARN L193 SmtUtils]: Spent 342.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 92 [2020-10-28 09:11:35,962 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 52 [2020-10-28 09:11:36,644 WARN L193 SmtUtils]: Spent 427.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 85 [2020-10-28 09:11:37,230 WARN L193 SmtUtils]: Spent 442.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 87 [2020-10-28 09:11:37,880 WARN L193 SmtUtils]: Spent 417.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 84 [2020-10-28 09:11:37,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:11:37,972 INFO L93 Difference]: Finished difference Result 57 states and 58 transitions. [2020-10-28 09:11:37,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-28 09:11:37,973 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 46 [2020-10-28 09:11:37,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:11:37,974 INFO L225 Difference]: With dead ends: 57 [2020-10-28 09:11:37,974 INFO L226 Difference]: Without dead ends: 50 [2020-10-28 09:11:37,977 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 680 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=362, Invalid=2188, Unknown=0, NotChecked=0, Total=2550 [2020-10-28 09:11:37,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-28 09:11:37,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2020-10-28 09:11:37,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-28 09:11:37,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 51 transitions. [2020-10-28 09:11:37,988 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 51 transitions. Word has length 46 [2020-10-28 09:11:37,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:11:37,989 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 51 transitions. [2020-10-28 09:11:37,989 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-28 09:11:37,989 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 51 transitions. [2020-10-28 09:11:37,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-28 09:11:37,990 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:11:37,990 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 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] [2020-10-28 09:11:37,990 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-28 09:11:37,990 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:11:37,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:11:37,991 INFO L82 PathProgramCache]: Analyzing trace with hash -436856416, now seen corresponding path program 8 times [2020-10-28 09:11:37,991 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:11:37,991 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [689862353] [2020-10-28 09:11:37,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:11:38,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:11:38,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:38,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:38,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:38,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:39,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:39,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:39,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:39,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:39,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:40,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:40,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:40,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:40,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:40,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:40,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:40,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:41,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:43,009 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:11:43,010 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-28 09:11:43,010 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 17 [2020-10-28 09:11:43,010 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-28 09:11:43,010 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:11:43,010 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:11:43,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-28 09:11:43,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 09:11:43,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-28 09:11:43,010 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:11:43,393 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:11:43,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:11:43,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:43,400 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:11:43,400 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:11:43,400 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:11:43,400 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 09:11:43,401 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:11:43,401 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:11:43,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:11:43,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:11:43,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:11:43,401 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:11:43,403 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:11:43,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:11:43,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:43,406 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:11:43,406 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:11:43,406 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:11:43,406 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:11:43,406 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:11:43,406 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:11:43,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 09:11:43,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:11:43,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 09:11:43,407 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:11:43,413 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 4 proven. 51 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-28 09:11:43,413 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [689862353] [2020-10-28 09:11:43,413 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:11:43,413 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-28 09:11:43,413 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553209854] [2020-10-28 09:11:43,414 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-28 09:11:43,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:11:43,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-28 09:11:43,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2020-10-28 09:11:43,415 INFO L87 Difference]: Start difference. First operand 50 states and 51 transitions. Second operand 19 states. [2020-10-28 09:11:44,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:11:44,574 INFO L93 Difference]: Finished difference Result 81 states and 83 transitions. [2020-10-28 09:11:44,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-28 09:11:44,579 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 49 [2020-10-28 09:11:44,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:11:44,580 INFO L225 Difference]: With dead ends: 81 [2020-10-28 09:11:44,580 INFO L226 Difference]: Without dead ends: 57 [2020-10-28 09:11:44,581 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=340, Invalid=1142, Unknown=0, NotChecked=0, Total=1482 [2020-10-28 09:11:44,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-28 09:11:44,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 53. [2020-10-28 09:11:44,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-28 09:11:44,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2020-10-28 09:11:44,591 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 49 [2020-10-28 09:11:44,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:11:44,591 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2020-10-28 09:11:44,591 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-28 09:11:44,591 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2020-10-28 09:11:44,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-28 09:11:44,592 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:11:44,592 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 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 09:11:44,592 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-28 09:11:44,592 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:11:44,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:11:44,593 INFO L82 PathProgramCache]: Analyzing trace with hash 988065527, now seen corresponding path program 9 times [2020-10-28 09:11:44,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:11:44,593 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [484984924] [2020-10-28 09:11:44,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:11:44,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:11:44,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:44,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:44,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:45,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:45,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:45,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:45,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:46,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:47,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:47,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:48,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:48,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:49,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:49,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:49,713 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:11:49,713 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-28 09:11:49,713 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-28 09:11:49,713 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5094 [2020-10-28 09:11:49,714 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:11:49,714 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:11:49,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-28 09:11:49,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 09:11:49,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-28 09:11:49,714 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:11:51,781 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:11:51,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:11:51,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:51,788 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:11:51,788 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:11:51,788 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:11:51,788 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:11:51,788 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:11:51,789 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:11:51,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:11:51,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:11:51,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:11:51,789 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:11:51,791 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:11:51,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:11:51,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:51,795 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:11:51,795 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:11:51,795 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:11:51,795 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:11:51,795 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:11:51,796 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:11:51,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 09:11:51,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:11:51,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 09:11:51,796 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:11:51,822 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 4 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 09:11:51,822 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [484984924] [2020-10-28 09:11:51,822 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:11:51,823 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-28 09:11:51,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020207407] [2020-10-28 09:11:51,823 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-28 09:11:51,824 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:11:51,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-28 09:11:51,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=702, Unknown=0, NotChecked=0, Total=812 [2020-10-28 09:11:51,825 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand 29 states. [2020-10-28 09:11:53,672 WARN L193 SmtUtils]: Spent 300.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 68 [2020-10-28 09:11:54,357 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 51 [2020-10-28 09:11:54,532 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 51 [2020-10-28 09:11:54,773 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 57 [2020-10-28 09:11:55,144 WARN L193 SmtUtils]: Spent 301.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 40 [2020-10-28 09:11:55,300 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 41 [2020-10-28 09:11:55,491 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 41 [2020-10-28 09:11:55,729 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 40 [2020-10-28 09:11:56,663 WARN L193 SmtUtils]: Spent 473.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 64 [2020-10-28 09:11:57,322 WARN L193 SmtUtils]: Spent 483.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 66 [2020-10-28 09:11:57,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:11:57,718 INFO L93 Difference]: Finished difference Result 63 states and 64 transitions. [2020-10-28 09:11:57,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-28 09:11:57,719 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 52 [2020-10-28 09:11:57,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:11:57,719 INFO L225 Difference]: With dead ends: 63 [2020-10-28 09:11:57,720 INFO L226 Difference]: Without dead ends: 56 [2020-10-28 09:11:57,723 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 873 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=575, Invalid=2965, Unknown=0, NotChecked=0, Total=3540 [2020-10-28 09:11:57,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-28 09:11:57,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2020-10-28 09:11:57,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-28 09:11:57,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 57 transitions. [2020-10-28 09:11:57,748 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 57 transitions. Word has length 52 [2020-10-28 09:11:57,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:11:57,748 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 57 transitions. [2020-10-28 09:11:57,749 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-28 09:11:57,749 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 57 transitions. [2020-10-28 09:11:57,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-28 09:11:57,753 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:11:57,753 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 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] [2020-10-28 09:11:57,753 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-28 09:11:57,753 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:11:57,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:11:57,754 INFO L82 PathProgramCache]: Analyzing trace with hash -1144724357, now seen corresponding path program 10 times [2020-10-28 09:11:57,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:11:57,754 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [913904546] [2020-10-28 09:11:57,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:11:57,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:11:57,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:57,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:57,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:58,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:58,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:58,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:58,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:58,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:58,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:59,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:12:02,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:12:02,818 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:12:02,818 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-28 09:12:02,818 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-28 09:12:02,818 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5034 [2020-10-28 09:12:02,818 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:12:02,819 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:12:02,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-28 09:12:02,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 09:12:02,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-28 09:12:02,819 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:12:03,355 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:12:03,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:12:03,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:12:03,360 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:12:03,360 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:12:03,361 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:12:03,361 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:12:03,361 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:12:03,361 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:12:03,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:12:03,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:12:03,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:12:03,361 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:12:03,363 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:12:03,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:12:03,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:12:03,367 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:12:03,367 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:12:03,367 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:12:03,367 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:12:03,367 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:12:03,367 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:12:03,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 09:12:03,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:12:03,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 09:12:03,368 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:12:03,378 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 8 proven. 76 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-28 09:12:03,378 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [913904546] [2020-10-28 09:12:03,378 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:12:03,379 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-28 09:12:03,379 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079813873] [2020-10-28 09:12:03,379 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-28 09:12:03,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:12:03,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-28 09:12:03,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=363, Unknown=0, NotChecked=0, Total=462 [2020-10-28 09:12:03,380 INFO L87 Difference]: Start difference. First operand 56 states and 57 transitions. Second operand 22 states. [2020-10-28 09:12:04,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:12:04,797 INFO L93 Difference]: Finished difference Result 90 states and 92 transitions. [2020-10-28 09:12:04,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-28 09:12:04,797 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 55 [2020-10-28 09:12:04,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:12:04,798 INFO L225 Difference]: With dead ends: 90 [2020-10-28 09:12:04,798 INFO L226 Difference]: Without dead ends: 63 [2020-10-28 09:12:04,800 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 508 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=452, Invalid=1618, Unknown=0, NotChecked=0, Total=2070 [2020-10-28 09:12:04,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-28 09:12:04,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 59. [2020-10-28 09:12:04,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-28 09:12:04,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 60 transitions. [2020-10-28 09:12:04,809 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 60 transitions. Word has length 55 [2020-10-28 09:12:04,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:12:04,810 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 60 transitions. [2020-10-28 09:12:04,810 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-28 09:12:04,810 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 60 transitions. [2020-10-28 09:12:04,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-28 09:12:04,811 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:12:04,811 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 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 09:12:04,811 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-28 09:12:04,811 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:12:04,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:12:04,812 INFO L82 PathProgramCache]: Analyzing trace with hash 552459410, now seen corresponding path program 11 times [2020-10-28 09:12:04,812 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:12:04,812 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [686646453] [2020-10-28 09:12:04,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:12:04,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:12:04,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:12:05,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:12:05,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:12:05,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:12:06,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:12:07,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:12:07,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:12:07,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:12:07,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:12:09,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:12:09,833 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:12:09,833 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-28 09:12:09,833 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-28 09:12:09,833 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-28 09:12:09,833 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:12:09,834 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:12:09,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-28 09:12:09,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 09:12:09,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-28 09:12:09,834 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:12:11,334 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 56 [2020-10-28 09:12:11,498 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 51 [2020-10-28 09:12:11,695 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 48 [2020-10-28 09:12:11,875 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 52 [2020-10-28 09:12:12,014 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 45 [2020-10-28 09:12:12,166 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 45 [2020-10-28 09:12:12,329 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 39 [2020-10-28 09:12:12,881 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:12:12,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:12:12,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:12:12,887 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:12:12,887 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:12:12,887 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:12:12,887 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:12:12,887 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:12:12,887 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:12:12,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:12:12,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:12:12,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:12:12,887 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:12:12,889 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:12:12,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:12:12,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:12:12,893 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:12:12,893 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:12:12,893 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:12:12,893 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:12:12,893 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:12:12,893 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:12:12,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 09:12:12,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:12:12,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 09:12:12,893 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:12:12,924 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 11 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 09:12:12,924 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [686646453] [2020-10-28 09:12:12,924 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:12:12,925 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-28 09:12:12,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638157905] [2020-10-28 09:12:12,925 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-28 09:12:12,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:12:12,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-28 09:12:12,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=932, Unknown=0, NotChecked=0, Total=1056 [2020-10-28 09:12:12,926 INFO L87 Difference]: Start difference. First operand 59 states and 60 transitions. Second operand 33 states. [2020-10-28 09:12:14,276 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 45 [2020-10-28 09:12:14,759 WARN L193 SmtUtils]: Spent 320.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 79 [2020-10-28 09:12:15,035 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 42 [2020-10-28 09:12:15,267 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 46 [2020-10-28 09:12:15,543 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 51 [2020-10-28 09:12:15,804 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 50 [2020-10-28 09:12:16,139 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 59 [2020-10-28 09:12:16,434 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 59 [2020-10-28 09:12:16,955 WARN L193 SmtUtils]: Spent 428.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 92 [2020-10-28 09:12:17,494 WARN L193 SmtUtils]: Spent 447.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 95 [2020-10-28 09:12:17,866 WARN L193 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 79 [2020-10-28 09:12:18,104 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 65 [2020-10-28 09:12:18,496 WARN L193 SmtUtils]: Spent 325.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 81 [2020-10-28 09:12:18,844 WARN L193 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 73 [2020-10-28 09:12:19,110 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 67 [2020-10-28 09:12:19,561 WARN L193 SmtUtils]: Spent 393.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 83 [2020-10-28 09:12:19,959 WARN L193 SmtUtils]: Spent 316.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 76 [2020-10-28 09:12:20,250 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 71 [2020-10-28 09:12:20,607 WARN L193 SmtUtils]: Spent 293.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 72 [2020-10-28 09:12:20,969 WARN L193 SmtUtils]: Spent 293.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 74 [2020-10-28 09:12:21,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:12:21,239 INFO L93 Difference]: Finished difference Result 91 states and 93 transitions. [2020-10-28 09:12:21,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-28 09:12:21,239 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 58 [2020-10-28 09:12:21,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:12:21,241 INFO L225 Difference]: With dead ends: 91 [2020-10-28 09:12:21,241 INFO L226 Difference]: Without dead ends: 64 [2020-10-28 09:12:21,244 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1301 ImplicationChecksByTransitivity, 9.9s TimeCoverageRelationStatistics Valid=613, Invalid=4079, Unknown=0, NotChecked=0, Total=4692 [2020-10-28 09:12:21,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-28 09:12:21,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 62. [2020-10-28 09:12:21,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-28 09:12:21,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 63 transitions. [2020-10-28 09:12:21,257 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 63 transitions. Word has length 58 [2020-10-28 09:12:21,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:12:21,258 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 63 transitions. [2020-10-28 09:12:21,258 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-28 09:12:21,258 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 63 transitions. [2020-10-28 09:12:21,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-28 09:12:21,259 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:12:21,259 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 5, 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 09:12:21,259 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-28 09:12:21,259 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:12:21,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:12:21,260 INFO L82 PathProgramCache]: Analyzing trace with hash 999053595, now seen corresponding path program 12 times [2020-10-28 09:12:21,260 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:12:21,260 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [911333995] [2020-10-28 09:12:21,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:12:21,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:12:21,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:12:21,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:12:21,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:12:22,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:12:22,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:12:23,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:12:24,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:12:25,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:12:26,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:12:26,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:12:26,314 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:12:26,314 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-28 09:12:26,314 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-28 09:12:26,315 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5031 [2020-10-28 09:12:26,315 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:12:26,315 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:12:26,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-28 09:12:26,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 09:12:26,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-28 09:12:26,315 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:12:26,600 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:12:26,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:12:26,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:12:26,607 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:12:26,608 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:12:26,608 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:12:26,608 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 09:12:26,608 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:12:26,609 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:12:26,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:12:26,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:12:26,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:12:26,609 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:12:26,613 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:12:26,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:12:26,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:12:26,615 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:12:26,616 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:12:26,616 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:12:26,616 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:12:26,616 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:12:26,616 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:12:26,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:12:26,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:12:26,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:12:26,617 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:12:26,629 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 51 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 09:12:26,630 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [911333995] [2020-10-28 09:12:26,630 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:12:26,630 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-28 09:12:26,630 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70844560] [2020-10-28 09:12:26,631 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-28 09:12:26,631 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:12:26,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-28 09:12:26,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2020-10-28 09:12:26,632 INFO L87 Difference]: Start difference. First operand 62 states and 63 transitions. Second operand 18 states. [2020-10-28 09:12:27,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:12:27,485 INFO L93 Difference]: Finished difference Result 72 states and 73 transitions. [2020-10-28 09:12:27,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-28 09:12:27,486 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 61 [2020-10-28 09:12:27,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:12:27,487 INFO L225 Difference]: With dead ends: 72 [2020-10-28 09:12:27,487 INFO L226 Difference]: Without dead ends: 65 [2020-10-28 09:12:27,489 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=248, Invalid=808, Unknown=0, NotChecked=0, Total=1056 [2020-10-28 09:12:27,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-28 09:12:27,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2020-10-28 09:12:27,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-28 09:12:27,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 66 transitions. [2020-10-28 09:12:27,497 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 66 transitions. Word has length 61 [2020-10-28 09:12:27,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:12:27,497 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 66 transitions. [2020-10-28 09:12:27,497 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-28 09:12:27,497 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 66 transitions. [2020-10-28 09:12:27,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-28 09:12:27,498 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:12:27,499 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 6, 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 09:12:27,499 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-28 09:12:27,499 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:12:27,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:12:27,499 INFO L82 PathProgramCache]: Analyzing trace with hash -216705065, now seen corresponding path program 13 times [2020-10-28 09:12:27,500 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:12:27,500 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [695900625] [2020-10-28 09:12:27,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:12:27,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:12:27,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:12:27,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:12:28,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:12:28,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:12:28,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:12:29,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:12:29,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:12:30,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:12:30,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:12:31,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:12:32,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:12:32,537 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:12:32,537 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-28 09:12:32,537 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-28 09:12:32,537 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-28 09:12:32,537 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:12:32,538 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:12:32,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-28 09:12:32,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 09:12:32,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-28 09:12:32,538 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:12:33,179 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 31 [2020-10-28 09:12:34,153 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 46 [2020-10-28 09:12:34,321 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 55 [2020-10-28 09:12:34,508 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 53 [2020-10-28 09:12:34,682 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 45 [2020-10-28 09:12:34,829 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 46 [2020-10-28 09:12:34,991 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 41 [2020-10-28 09:12:35,141 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 46 [2020-10-28 09:12:35,325 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 42 [2020-10-28 09:12:35,505 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 46 [2020-10-28 09:12:35,671 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 35 [2020-10-28 09:12:36,181 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:12:36,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:12:36,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:12:36,189 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:12:36,189 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:12:36,189 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:12:36,190 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:12:36,190 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:12:36,190 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:12:36,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:12:36,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:12:36,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:12:36,190 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:12:36,192 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:12:36,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:12:36,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:12:36,195 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:12:36,195 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:12:36,195 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:12:36,195 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:12:36,196 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:12:36,196 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:12:36,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 09:12:36,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:12:36,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 09:12:36,196 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:12:36,233 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 20 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 09:12:36,234 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [695900625] [2020-10-28 09:12:36,234 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:12:36,234 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-28 09:12:36,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125189428] [2020-10-28 09:12:36,234 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-28 09:12:36,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:12:36,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-28 09:12:36,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=1133, Unknown=0, NotChecked=0, Total=1332 [2020-10-28 09:12:36,236 INFO L87 Difference]: Start difference. First operand 65 states and 66 transitions. Second operand 37 states. [2020-10-28 09:12:38,070 WARN L193 SmtUtils]: Spent 470.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 89 [2020-10-28 09:12:38,587 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 51 [2020-10-28 09:12:38,822 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 49 [2020-10-28 09:12:39,327 WARN L193 SmtUtils]: Spent 389.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 82 [2020-10-28 09:12:39,814 WARN L193 SmtUtils]: Spent 416.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 85 [2020-10-28 09:12:40,123 WARN L193 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 71 [2020-10-28 09:12:40,380 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 71 [2020-10-28 09:12:40,647 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 75 [2020-10-28 09:12:40,929 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 72 [2020-10-28 09:12:41,222 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 80 [2020-10-28 09:12:41,519 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 84 [2020-10-28 09:12:41,870 WARN L193 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 79 [2020-10-28 09:12:42,172 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 83 [2020-10-28 09:12:42,492 WARN L193 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 84 [2020-10-28 09:12:42,821 WARN L193 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 76 [2020-10-28 09:12:43,195 WARN L193 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 85 [2020-10-28 09:12:43,642 WARN L193 SmtUtils]: Spent 370.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 81 [2020-10-28 09:12:43,982 WARN L193 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 77 [2020-10-28 09:12:44,350 WARN L193 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 88 [2020-10-28 09:12:44,919 WARN L193 SmtUtils]: Spent 494.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 89 [2020-10-28 09:12:45,501 WARN L193 SmtUtils]: Spent 504.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 92 [2020-10-28 09:12:45,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:12:45,785 INFO L93 Difference]: Finished difference Result 100 states and 102 transitions. [2020-10-28 09:12:45,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-10-28 09:12:45,786 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 64 [2020-10-28 09:12:45,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:12:45,787 INFO L225 Difference]: With dead ends: 100 [2020-10-28 09:12:45,787 INFO L226 Difference]: Without dead ends: 70 [2020-10-28 09:12:45,790 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1852 ImplicationChecksByTransitivity, 11.8s TimeCoverageRelationStatistics Valid=932, Invalid=5074, Unknown=0, NotChecked=0, Total=6006 [2020-10-28 09:12:45,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-28 09:12:45,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 68. [2020-10-28 09:12:45,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-28 09:12:45,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 69 transitions. [2020-10-28 09:12:45,802 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 69 transitions. Word has length 64 [2020-10-28 09:12:45,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:12:45,803 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 69 transitions. [2020-10-28 09:12:45,803 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-28 09:12:45,803 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 69 transitions. [2020-10-28 09:12:45,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-28 09:12:45,809 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:12:45,809 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 7, 6, 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 09:12:45,810 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-28 09:12:45,810 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:12:45,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:12:45,810 INFO L82 PathProgramCache]: Analyzing trace with hash -216233568, now seen corresponding path program 14 times [2020-10-28 09:12:45,811 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:12:45,811 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1090841093] [2020-10-28 09:12:45,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:12:45,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:12:45,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:12:46,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:12:46,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:12:46,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:12:48,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:12:49,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:12:50,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:12:50,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:12:50,915 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:12:50,916 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-28 09:12:50,916 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-28 09:12:50,916 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5087 [2020-10-28 09:12:50,916 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:12:50,916 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:12:50,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-28 09:12:50,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 09:12:50,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 63 [2020-10-28 09:12:50,916 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:12:52,221 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 53 [2020-10-28 09:12:52,531 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 53 [2020-10-28 09:12:52,846 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 46 [2020-10-28 09:12:53,945 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:12:53,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:12:53,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:12:53,952 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:12:53,953 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:12:53,953 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:12:53,953 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:12:53,953 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:12:53,953 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:12:53,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:12:53,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:12:53,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:12:53,953 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:12:53,955 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:12:53,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:12:53,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:12:53,958 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:12:53,958 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:12:53,958 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:12:53,958 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:12:53,958 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:12:53,958 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:12:53,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 09:12:53,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:12:53,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 09:12:53,959 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:12:53,997 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 65 proven. 90 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-28 09:12:53,997 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1090841093] [2020-10-28 09:12:53,997 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:12:53,997 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-28 09:12:53,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303406751] [2020-10-28 09:12:53,998 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-28 09:12:53,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:12:53,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-28 09:12:53,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=1184, Unknown=0, NotChecked=0, Total=1332 [2020-10-28 09:12:53,999 INFO L87 Difference]: Start difference. First operand 68 states and 69 transitions. Second operand 37 states. [2020-10-28 09:12:55,932 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 51 [2020-10-28 09:12:56,133 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 52 [2020-10-28 09:12:56,392 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 38 [2020-10-28 09:12:57,587 WARN L193 SmtUtils]: Spent 726.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 118 [2020-10-28 09:12:58,044 WARN L193 SmtUtils]: Spent 364.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 65 [2020-10-28 09:12:59,148 WARN L193 SmtUtils]: Spent 749.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 77 [2020-10-28 09:12:59,682 WARN L193 SmtUtils]: Spent 442.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 64 [2020-10-28 09:13:00,012 WARN L193 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 62 [2020-10-28 09:13:00,459 WARN L193 SmtUtils]: Spent 362.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 56 [2020-10-28 09:13:00,809 WARN L193 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 57 [2020-10-28 09:13:01,059 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 51 [2020-10-28 09:13:01,454 WARN L193 SmtUtils]: Spent 302.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 49 [2020-10-28 09:13:01,702 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 50 [2020-10-28 09:13:02,000 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 50 [2020-10-28 09:13:02,432 WARN L193 SmtUtils]: Spent 344.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 50 [2020-10-28 09:13:02,621 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 51 [2020-10-28 09:13:02,852 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 51 [2020-10-28 09:13:03,143 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 49 [2020-10-28 09:13:03,318 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 52 [2020-10-28 09:13:04,685 WARN L193 SmtUtils]: Spent 938.00 ms on a formula simplification. DAG size of input: 150 DAG size of output: 94 [2020-10-28 09:13:05,917 WARN L193 SmtUtils]: Spent 991.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 96 [2020-10-28 09:13:06,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:13:06,422 INFO L93 Difference]: Finished difference Result 78 states and 79 transitions. [2020-10-28 09:13:06,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-10-28 09:13:06,423 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 67 [2020-10-28 09:13:06,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:13:06,424 INFO L225 Difference]: With dead ends: 78 [2020-10-28 09:13:06,424 INFO L226 Difference]: Without dead ends: 71 [2020-10-28 09:13:06,427 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1496 ImplicationChecksByTransitivity, 13.9s TimeCoverageRelationStatistics Valid=865, Invalid=4987, Unknown=0, NotChecked=0, Total=5852 [2020-10-28 09:13:06,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-28 09:13:06,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2020-10-28 09:13:06,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-28 09:13:06,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 72 transitions. [2020-10-28 09:13:06,434 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 72 transitions. Word has length 67 [2020-10-28 09:13:06,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:13:06,434 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 72 transitions. [2020-10-28 09:13:06,434 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-28 09:13:06,435 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 72 transitions. [2020-10-28 09:13:06,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-28 09:13:06,435 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:13:06,435 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 7, 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 09:13:06,435 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-28 09:13:06,436 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:13:06,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:13:06,436 INFO L82 PathProgramCache]: Analyzing trace with hash 1737727282, now seen corresponding path program 15 times [2020-10-28 09:13:06,436 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:13:06,436 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2083555835] [2020-10-28 09:13:06,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:13:06,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:13:06,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:13:06,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:13:07,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:13:07,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:13:10,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:13:10,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:13:10,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:13:10,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:13:11,468 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:13:11,469 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-28 09:13:11,469 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-28 09:13:11,469 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-28 09:13:11,469 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:13:11,469 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:13:11,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-28 09:13:11,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 09:13:11,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-28 09:13:11,469 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:13:12,365 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 45 [2020-10-28 09:13:12,503 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 46 [2020-10-28 09:13:12,675 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 51 [2020-10-28 09:13:12,845 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 52 [2020-10-28 09:13:13,000 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 44 [2020-10-28 09:13:13,153 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 45 [2020-10-28 09:13:13,322 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 48 [2020-10-28 09:13:13,470 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 49 [2020-10-28 09:13:13,629 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 50 [2020-10-28 09:13:13,799 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 49 [2020-10-28 09:13:13,993 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 53 [2020-10-28 09:13:14,239 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 68 [2020-10-28 09:13:14,444 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 55 [2020-10-28 09:13:14,642 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 53 [2020-10-28 09:13:14,950 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 54 [2020-10-28 09:13:15,136 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 47 [2020-10-28 09:13:15,344 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 46 [2020-10-28 09:13:15,543 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 42 [2020-10-28 09:13:16,793 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:13:16,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:13:16,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:13:16,801 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:13:16,802 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:13:16,802 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:13:16,802 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:13:16,802 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:13:16,802 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:13:16,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:13:16,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:13:16,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:13:16,803 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:13:16,805 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:13:16,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:13:16,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:13:16,808 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:13:16,809 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:13:16,809 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:13:16,809 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:13:16,809 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:13:16,809 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:13:16,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 09:13:16,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:13:16,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 09:13:16,810 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:13:16,868 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 32 proven. 152 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 09:13:16,868 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2083555835] [2020-10-28 09:13:16,868 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:13:16,869 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-28 09:13:16,869 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997772340] [2020-10-28 09:13:16,869 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-28 09:13:16,869 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:13:16,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-28 09:13:16,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=1431, Unknown=0, NotChecked=0, Total=1640 [2020-10-28 09:13:16,871 INFO L87 Difference]: Start difference. First operand 71 states and 72 transitions. Second operand 41 states. [2020-10-28 09:13:19,641 WARN L193 SmtUtils]: Spent 551.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 96 [2020-10-28 09:13:20,157 WARN L193 SmtUtils]: Spent 321.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 96 [2020-10-28 09:13:20,618 WARN L193 SmtUtils]: Spent 339.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 98 [2020-10-28 09:13:20,873 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2020-10-28 09:13:21,066 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2020-10-28 09:13:21,463 WARN L193 SmtUtils]: Spent 300.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 88 [2020-10-28 09:13:21,922 WARN L193 SmtUtils]: Spent 313.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 91 [2020-10-28 09:13:22,360 WARN L193 SmtUtils]: Spent 334.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 95 [2020-10-28 09:13:22,818 WARN L193 SmtUtils]: Spent 349.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 94 [2020-10-28 09:13:23,293 WARN L193 SmtUtils]: Spent 352.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 99 [2020-10-28 09:13:23,710 WARN L193 SmtUtils]: Spent 328.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 103 [2020-10-28 09:13:24,141 WARN L193 SmtUtils]: Spent 335.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 92 [2020-10-28 09:13:24,518 WARN L193 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 87 [2020-10-28 09:13:24,918 WARN L193 SmtUtils]: Spent 310.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 91 [2020-10-28 09:13:25,348 WARN L193 SmtUtils]: Spent 336.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 90 [2020-10-28 09:13:25,709 WARN L193 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 88 [2020-10-28 09:13:26,078 WARN L193 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 92 [2020-10-28 09:13:26,479 WARN L193 SmtUtils]: Spent 298.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 91 [2020-10-28 09:13:26,832 WARN L193 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 93 [2020-10-28 09:13:27,196 WARN L193 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 96 [2020-10-28 09:13:27,650 WARN L193 SmtUtils]: Spent 312.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 92 [2020-10-28 09:13:28,075 WARN L193 SmtUtils]: Spent 322.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 99 [2020-10-28 09:13:28,515 WARN L193 SmtUtils]: Spent 339.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 99 [2020-10-28 09:13:28,967 WARN L193 SmtUtils]: Spent 325.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 93 [2020-10-28 09:13:29,400 WARN L193 SmtUtils]: Spent 327.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 101 [2020-10-28 09:13:30,019 WARN L193 SmtUtils]: Spent 527.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 96 [2020-10-28 09:13:30,668 WARN L193 SmtUtils]: Spent 566.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 98 [2020-10-28 09:13:30,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:13:30,931 INFO L93 Difference]: Finished difference Result 109 states and 111 transitions. [2020-10-28 09:13:30,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2020-10-28 09:13:30,932 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 70 [2020-10-28 09:13:30,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:13:30,933 INFO L225 Difference]: With dead ends: 109 [2020-10-28 09:13:30,934 INFO L226 Difference]: Without dead ends: 76 [2020-10-28 09:13:30,937 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2310 ImplicationChecksByTransitivity, 17.5s TimeCoverageRelationStatistics Valid=1013, Invalid=6643, Unknown=0, NotChecked=0, Total=7656 [2020-10-28 09:13:30,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-28 09:13:30,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 74. [2020-10-28 09:13:30,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-28 09:13:30,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 75 transitions. [2020-10-28 09:13:30,945 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 75 transitions. Word has length 70 [2020-10-28 09:13:30,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:13:30,946 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 75 transitions. [2020-10-28 09:13:30,946 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-28 09:13:30,946 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 75 transitions. [2020-10-28 09:13:30,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-28 09:13:30,947 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:13:30,947 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 7, 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 09:13:30,947 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-28 09:13:30,947 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:13:30,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:13:30,947 INFO L82 PathProgramCache]: Analyzing trace with hash -1602841541, now seen corresponding path program 16 times [2020-10-28 09:13:30,947 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:13:30,948 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [187114754] [2020-10-28 09:13:30,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:13:30,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:13:30,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:13:31,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:13:31,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:13:32,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:13:32,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:13:34,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:13:35,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:13:35,964 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:13:35,964 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-28 09:13:35,964 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 09:13:35,964 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-28 09:13:35,964 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:13:35,964 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:13:35,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-28 09:13:35,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 09:13:35,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-28 09:13:35,964 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:13:36,346 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:13:36,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:13:36,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:13:36,351 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:13:36,351 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:13:36,351 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:13:36,352 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:13:36,352 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:13:36,352 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:13:36,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:13:36,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:13:36,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:13:36,352 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:13:36,354 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:13:36,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:13:36,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:13:36,356 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:13:36,356 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:13:36,356 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:13:36,356 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 09:13:36,356 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:13:36,356 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:13:36,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:13:36,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:13:36,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:13:36,357 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:13:36,363 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 92 proven. 117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 09:13:36,363 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [187114754] [2020-10-28 09:13:36,364 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:13:36,364 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-28 09:13:36,364 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583273850] [2020-10-28 09:13:36,364 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-28 09:13:36,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:13:36,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-28 09:13:36,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=349, Unknown=0, NotChecked=0, Total=462 [2020-10-28 09:13:36,365 INFO L87 Difference]: Start difference. First operand 74 states and 75 transitions. Second operand 22 states. [2020-10-28 09:13:37,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:13:37,724 INFO L93 Difference]: Finished difference Result 84 states and 85 transitions. [2020-10-28 09:13:37,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-28 09:13:37,725 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 73 [2020-10-28 09:13:37,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:13:37,726 INFO L225 Difference]: With dead ends: 84 [2020-10-28 09:13:37,726 INFO L226 Difference]: Without dead ends: 77 [2020-10-28 09:13:37,730 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=379, Invalid=1261, Unknown=0, NotChecked=0, Total=1640 [2020-10-28 09:13:37,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-28 09:13:37,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2020-10-28 09:13:37,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-28 09:13:37,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 78 transitions. [2020-10-28 09:13:37,740 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 78 transitions. Word has length 73 [2020-10-28 09:13:37,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:13:37,741 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 78 transitions. [2020-10-28 09:13:37,741 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-28 09:13:37,741 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 78 transitions. [2020-10-28 09:13:37,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-28 09:13:37,742 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:13:37,742 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 8, 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 09:13:37,742 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-28 09:13:37,742 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:13:37,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:13:37,743 INFO L82 PathProgramCache]: Analyzing trace with hash -1999910729, now seen corresponding path program 17 times [2020-10-28 09:13:37,743 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:13:37,743 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1931865660] [2020-10-28 09:13:37,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:13:37,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:13:37,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:13:38,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:13:38,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:13:38,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:13:41,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:13:41,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:13:41,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:13:42,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:13:43,135 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:13:43,135 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-28 09:13:43,135 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-28 09:13:43,135 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5364 [2020-10-28 09:13:43,135 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:13:43,136 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:13:43,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 43 [2020-10-28 09:13:43,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 09:13:43,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-28 09:13:43,136 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:13:44,493 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 31 [2020-10-28 09:13:44,743 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 32 [2020-10-28 09:13:44,951 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 35 [2020-10-28 09:13:45,249 WARN L193 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 37 [2020-10-28 09:13:45,535 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 41 [2020-10-28 09:13:45,754 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 40 [2020-10-28 09:13:46,007 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 43 [2020-10-28 09:13:46,412 WARN L193 SmtUtils]: Spent 312.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 47 [2020-10-28 09:13:46,865 WARN L193 SmtUtils]: Spent 394.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 52 [2020-10-28 09:13:47,291 WARN L193 SmtUtils]: Spent 357.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 56 [2020-10-28 09:13:47,972 WARN L193 SmtUtils]: Spent 610.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 54 [2020-10-28 09:13:48,697 WARN L193 SmtUtils]: Spent 628.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 56 [2020-10-28 09:13:49,522 WARN L193 SmtUtils]: Spent 724.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 65 [2020-10-28 09:13:50,543 WARN L193 SmtUtils]: Spent 861.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 70 [2020-10-28 09:13:51,335 WARN L193 SmtUtils]: Spent 663.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 64 [2020-10-28 09:13:52,058 WARN L193 SmtUtils]: Spent 555.00 ms on a formula simplification. DAG size of input: 195 DAG size of output: 96 [2020-10-28 09:13:52,654 WARN L193 SmtUtils]: Spent 502.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 60 [2020-10-28 09:13:53,200 WARN L193 SmtUtils]: Spent 449.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 55 [2020-10-28 09:13:53,386 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 44 [2020-10-28 09:13:53,559 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 42 [2020-10-28 09:13:53,736 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 41 [2020-10-28 09:13:54,105 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 42 [2020-10-28 09:13:54,465 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 37 [2020-10-28 09:13:55,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:13:55,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:13:55,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:13:55,428 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:13:55,428 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:13:55,428 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:13:55,428 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:13:55,428 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:13:55,428 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:13:55,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:13:55,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:13:55,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:13:55,429 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:13:55,431 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:13:55,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:13:55,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:13:55,438 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:13:55,438 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:13:55,439 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:13:55,439 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 09:13:55,439 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:13:55,439 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:13:55,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 09:13:55,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:13:55,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 09:13:55,440 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:13:55,540 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 0 proven. 234 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 09:13:55,541 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1931865660] [2020-10-28 09:13:55,541 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:13:55,541 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2020-10-28 09:13:55,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519054903] [2020-10-28 09:13:55,542 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-10-28 09:13:55,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:13:55,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-10-28 09:13:55,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=1804, Unknown=0, NotChecked=0, Total=1980 [2020-10-28 09:13:55,544 INFO L87 Difference]: Start difference. First operand 77 states and 78 transitions. Second operand 45 states. [2020-10-28 09:13:58,808 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 51 [2020-10-28 09:13:59,084 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 58 [2020-10-28 09:14:00,378 WARN L193 SmtUtils]: Spent 981.00 ms on a formula simplification. DAG size of input: 214 DAG size of output: 149 [2020-10-28 09:14:00,796 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 59 [2020-10-28 09:14:01,113 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 58 [2020-10-28 09:14:01,620 WARN L193 SmtUtils]: Spent 411.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 65 [2020-10-28 09:14:02,138 WARN L193 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 69 [2020-10-28 09:14:02,620 WARN L193 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 58 [2020-10-28 09:14:03,169 WARN L193 SmtUtils]: Spent 313.00 ms on a formula simplification. DAG size of input: 156 DAG size of output: 60 [2020-10-28 09:14:03,658 WARN L193 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 144 DAG size of output: 65 [2020-10-28 09:14:04,430 WARN L193 SmtUtils]: Spent 568.00 ms on a formula simplification. DAG size of input: 177 DAG size of output: 132 [2020-10-28 09:14:05,144 WARN L193 SmtUtils]: Spent 538.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 135 [2020-10-28 09:14:05,754 WARN L193 SmtUtils]: Spent 397.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 128 [2020-10-28 09:14:06,436 WARN L193 SmtUtils]: Spent 492.00 ms on a formula simplification. DAG size of input: 148 DAG size of output: 134 [2020-10-28 09:14:07,117 WARN L193 SmtUtils]: Spent 514.00 ms on a formula simplification. DAG size of input: 151 DAG size of output: 138 [2020-10-28 09:14:07,731 WARN L193 SmtUtils]: Spent 442.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 134 [2020-10-28 09:14:08,456 WARN L193 SmtUtils]: Spent 558.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 139 [2020-10-28 09:14:09,149 WARN L193 SmtUtils]: Spent 548.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 143 [2020-10-28 09:14:09,804 WARN L193 SmtUtils]: Spent 498.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 139 [2020-10-28 09:14:10,559 WARN L193 SmtUtils]: Spent 578.00 ms on a formula simplification. DAG size of input: 160 DAG size of output: 143 [2020-10-28 09:14:11,318 WARN L193 SmtUtils]: Spent 602.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 146 [2020-10-28 09:14:12,019 WARN L193 SmtUtils]: Spent 540.00 ms on a formula simplification. DAG size of input: 151 DAG size of output: 142 [2020-10-28 09:14:12,844 WARN L193 SmtUtils]: Spent 636.00 ms on a formula simplification. DAG size of input: 165 DAG size of output: 146 [2020-10-28 09:14:13,688 WARN L193 SmtUtils]: Spent 665.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 147 [2020-10-28 09:14:14,445 WARN L193 SmtUtils]: Spent 583.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 144 [2020-10-28 09:14:15,307 WARN L193 SmtUtils]: Spent 682.00 ms on a formula simplification. DAG size of input: 168 DAG size of output: 149 [2020-10-28 09:14:16,583 WARN L193 SmtUtils]: Spent 1.10 s on a formula simplification. DAG size of input: 215 DAG size of output: 150 [2020-10-28 09:14:17,889 WARN L193 SmtUtils]: Spent 1.15 s on a formula simplification. DAG size of input: 217 DAG size of output: 152 [2020-10-28 09:14:18,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:14:18,415 INFO L93 Difference]: Finished difference Result 118 states and 120 transitions. [2020-10-28 09:14:18,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2020-10-28 09:14:18,416 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 76 [2020-10-28 09:14:18,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:14:18,417 INFO L225 Difference]: With dead ends: 118 [2020-10-28 09:14:18,418 INFO L226 Difference]: Without dead ends: 82 [2020-10-28 09:14:18,421 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2227 ImplicationChecksByTransitivity, 31.1s TimeCoverageRelationStatistics Valid=946, Invalid=7796, Unknown=0, NotChecked=0, Total=8742 [2020-10-28 09:14:18,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-28 09:14:18,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 80. [2020-10-28 09:14:18,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-28 09:14:18,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 81 transitions. [2020-10-28 09:14:18,429 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 81 transitions. Word has length 76 [2020-10-28 09:14:18,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:14:18,430 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 81 transitions. [2020-10-28 09:14:18,430 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-10-28 09:14:18,430 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 81 transitions. [2020-10-28 09:14:18,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-28 09:14:18,430 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:14:18,430 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 9, 9, 8, 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 09:14:18,431 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-28 09:14:18,431 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:14:18,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:14:18,431 INFO L82 PathProgramCache]: Analyzing trace with hash 259101952, now seen corresponding path program 18 times [2020-10-28 09:14:18,431 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:14:18,431 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [420239652] [2020-10-28 09:14:18,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:14:18,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:14:18,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:14:18,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:14:19,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:14:20,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:14:20,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:14:21,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:14:21,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:14:21,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking...