/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-industry-pattern/array_ptr_partial_init.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 09:22:28,042 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 09:22:28,047 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 09:22:28,112 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 09:22:28,113 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 09:22:28,120 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 09:22:28,123 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 09:22:28,129 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 09:22:28,133 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 09:22:28,140 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 09:22:28,142 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 09:22:28,144 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 09:22:28,145 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 09:22:28,149 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 09:22:28,152 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 09:22:28,155 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 09:22:28,157 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 09:22:28,161 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 09:22:28,169 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 09:22:28,198 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 09:22:28,200 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 09:22:28,202 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 09:22:28,204 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 09:22:28,208 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 09:22:28,220 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 09:22:28,221 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 09:22:28,221 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 09:22:28,223 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 09:22:28,225 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 09:22:28,226 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 09:22:28,227 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 09:22:28,228 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 09:22:28,231 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 09:22:28,232 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 09:22:28,234 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 09:22:28,234 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 09:22:28,236 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 09:22:28,236 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 09:22:28,236 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 09:22:28,238 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 09:22:28,239 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 09:22:28,247 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 09:22:28,298 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 09:22:28,299 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 09:22:28,302 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 09:22:28,303 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 09:22:28,303 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 09:22:28,304 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 09:22:28,304 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 09:22:28,304 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 09:22:28,305 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 09:22:28,305 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 09:22:28,305 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 09:22:28,305 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 09:22:28,305 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 09:22:28,306 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 09:22:28,306 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 09:22:28,307 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 09:22:28,307 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 09:22:28,308 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 09:22:28,308 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 09:22:28,308 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 09:22:28,308 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 09:22:28,309 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 09:22:28,309 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 09:22:28,309 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 09:22:28,309 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 09:22:28,310 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 09:22:28,310 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 09:22:28,310 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 09:22:28,310 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 09:22:28,310 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 09:22:28,760 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 09:22:28,819 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 09:22:28,824 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 09:22:28,825 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 09:22:28,826 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 09:22:28,828 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-industry-pattern/array_ptr_partial_init.i [2020-10-28 09:22:28,934 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d15212252/0b1e8b86ba354d0295561d984eddc9e8/FLAG5f136cf8c [2020-10-28 09:22:29,592 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 09:22:29,592 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-industry-pattern/array_ptr_partial_init.i [2020-10-28 09:22:29,602 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d15212252/0b1e8b86ba354d0295561d984eddc9e8/FLAG5f136cf8c [2020-10-28 09:22:29,943 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d15212252/0b1e8b86ba354d0295561d984eddc9e8 [2020-10-28 09:22:29,948 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 09:22:29,955 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 09:22:29,957 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 09:22:29,957 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 09:22:29,962 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 09:22:29,963 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 09:22:29" (1/1) ... [2020-10-28 09:22:29,967 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3f63565a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:22:29, skipping insertion in model container [2020-10-28 09:22:29,967 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 09:22:29" (1/1) ... [2020-10-28 09:22:29,977 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 09:22:29,998 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 09:22:30,179 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 09:22:30,195 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 09:22:30,215 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 09:22:30,236 INFO L208 MainTranslator]: Completed translation [2020-10-28 09:22:30,237 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:22:30 WrapperNode [2020-10-28 09:22:30,237 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 09:22:30,239 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 09:22:30,239 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 09:22:30,239 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 09:22:30,253 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:22:30" (1/1) ... [2020-10-28 09:22:30,253 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:22:30" (1/1) ... [2020-10-28 09:22:30,263 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:22:30" (1/1) ... [2020-10-28 09:22:30,263 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:22:30" (1/1) ... [2020-10-28 09:22:30,272 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:22:30" (1/1) ... [2020-10-28 09:22:30,277 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:22:30" (1/1) ... [2020-10-28 09:22:30,279 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:22:30" (1/1) ... [2020-10-28 09:22:30,282 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 09:22:30,284 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 09:22:30,284 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 09:22:30,284 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 09:22:30,285 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:22:30" (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 09:22:30,370 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 09:22:30,371 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 09:22:30,371 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 09:22:30,372 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-28 09:22:30,372 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 09:22:30,372 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-28 09:22:30,372 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 09:22:30,373 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 09:22:30,373 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-28 09:22:30,373 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-28 09:22:30,375 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 09:22:30,375 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 09:22:30,375 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-28 09:22:30,375 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 09:22:30,376 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-28 09:22:30,377 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-28 09:22:30,377 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-28 09:22:30,378 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 09:22:30,378 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 09:22:30,378 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 09:22:30,379 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 09:22:30,380 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 09:22:30,380 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 09:22:30,843 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 09:22:30,844 INFO L298 CfgBuilder]: Removed 3 assume(true) statements. [2020-10-28 09:22:30,848 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 09:22:30 BoogieIcfgContainer [2020-10-28 09:22:30,848 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 09:22:30,852 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 09:22:30,852 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 09:22:30,857 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 09:22:30,858 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 09:22:29" (1/3) ... [2020-10-28 09:22:30,859 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a6fcde0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 09:22:30, skipping insertion in model container [2020-10-28 09:22:30,860 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:22:30" (2/3) ... [2020-10-28 09:22:30,861 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a6fcde0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 09:22:30, skipping insertion in model container [2020-10-28 09:22:30,861 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 09:22:30" (3/3) ... [2020-10-28 09:22:30,864 INFO L111 eAbstractionObserver]: Analyzing ICFG array_ptr_partial_init.i [2020-10-28 09:22:30,880 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 09:22:30,886 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 09:22:30,903 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 09:22:30,954 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 09:22:30,954 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 09:22:30,954 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 09:22:30,954 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 09:22:30,954 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 09:22:30,955 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 09:22:30,955 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 09:22:30,955 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 09:22:30,985 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2020-10-28 09:22:30,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-28 09:22:30,994 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:22:30,995 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:22:30,996 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:22:31,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:22:31,006 INFO L82 PathProgramCache]: Analyzing trace with hash -1906025394, now seen corresponding path program 1 times [2020-10-28 09:22:31,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:22:31,018 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [666051243] [2020-10-28 09:22:31,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:22:31,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:22:31,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:22:31,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:22:31,528 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:22:31,528 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-28 09:22:31,528 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:22:31,528 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 263 [2020-10-28 09:22:31,532 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:22:31,532 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:22:31,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:22:31,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 09:22:31,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:22:31,533 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-28 09:22:31,632 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:22:31,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:22:31,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:22:31,655 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:22:31,655 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:22:31,655 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:22:31,656 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-28 09:22:31,656 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:22:31,656 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:22:31,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:22:31,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:22:31,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:22:31,657 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:22:31,673 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 09:22:31,674 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [666051243] [2020-10-28 09:22:31,678 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 09:22:31,678 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-28 09:22:31,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248184297] [2020-10-28 09:22:31,685 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-28 09:22:31,686 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:22:31,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-28 09:22:31,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-28 09:22:31,711 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 3 states. [2020-10-28 09:22:31,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:22:31,840 INFO L93 Difference]: Finished difference Result 53 states and 67 transitions. [2020-10-28 09:22:31,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-28 09:22:31,842 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-10-28 09:22:31,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:22:31,851 INFO L225 Difference]: With dead ends: 53 [2020-10-28 09:22:31,851 INFO L226 Difference]: Without dead ends: 24 [2020-10-28 09:22:31,855 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-28 09:22:31,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-10-28 09:22:31,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-10-28 09:22:31,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-28 09:22:31,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2020-10-28 09:22:31,905 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 17 [2020-10-28 09:22:31,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:22:31,906 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2020-10-28 09:22:31,906 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-28 09:22:31,906 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2020-10-28 09:22:31,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-28 09:22:31,907 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:22:31,907 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:22:31,908 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 09:22:31,908 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:22:31,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:22:31,909 INFO L82 PathProgramCache]: Analyzing trace with hash -1754426942, now seen corresponding path program 1 times [2020-10-28 09:22:31,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:22:31,910 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [160648928] [2020-10-28 09:22:31,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:22:31,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:22:31,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:22:31,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:22:32,205 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:22:32,206 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-28 09:22:32,206 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:22:32,207 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 276 [2020-10-28 09:22:32,207 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:22:32,207 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:22:32,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 09:22:32,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-28 09:22:32,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 09:22:32,213 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-10-28 09:22:32,329 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:22:32,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:22:32,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:22:32,363 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:22:32,363 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:22:32,364 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:22:32,364 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-28 09:22:32,364 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:22:32,365 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:22:32,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:22:32,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:22:32,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:22:32,366 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:22:32,373 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 09:22:32,374 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [160648928] [2020-10-28 09:22:32,375 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 09:22:32,375 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 09:22:32,375 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473829462] [2020-10-28 09:22:32,377 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 09:22:32,377 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:22:32,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 09:22:32,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 09:22:32,379 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 4 states. [2020-10-28 09:22:32,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:22:32,565 INFO L93 Difference]: Finished difference Result 56 states and 61 transitions. [2020-10-28 09:22:32,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 09:22:32,566 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2020-10-28 09:22:32,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:22:32,568 INFO L225 Difference]: With dead ends: 56 [2020-10-28 09:22:32,569 INFO L226 Difference]: Without dead ends: 40 [2020-10-28 09:22:32,570 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 09:22:32,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-28 09:22:32,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 26. [2020-10-28 09:22:32,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-28 09:22:32,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2020-10-28 09:22:32,581 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 17 [2020-10-28 09:22:32,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:22:32,582 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2020-10-28 09:22:32,582 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 09:22:32,582 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2020-10-28 09:22:32,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-28 09:22:32,583 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:22:32,584 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] [2020-10-28 09:22:32,584 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 09:22:32,584 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:22:32,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:22:32,585 INFO L82 PathProgramCache]: Analyzing trace with hash -999640386, now seen corresponding path program 1 times [2020-10-28 09:22:32,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:22:32,586 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [986759831] [2020-10-28 09:22:32,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:22:32,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:22:32,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:22:32,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:22:32,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:22:33,822 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:22:33,822 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-28 09:22:33,822 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:22:33,822 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1202 [2020-10-28 09:22:33,823 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:22:33,823 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:22:33,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 09:22:33,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:22:33,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-28 09:22:33,824 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:22:33,886 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:22:33,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:22:33,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:22:33,897 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:22:33,897 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:22:33,897 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:22:33,898 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 09:22:33,898 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:22:33,898 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:22:33,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:22:33,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:22:33,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:22:33,899 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:22:33,905 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 09:22:33,905 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [986759831] [2020-10-28 09:22:33,906 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:22:33,906 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 09:22:33,906 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765258219] [2020-10-28 09:22:33,906 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 09:22:33,907 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:22:33,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 09:22:33,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 09:22:33,908 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand 5 states. [2020-10-28 09:22:34,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:22:34,177 INFO L93 Difference]: Finished difference Result 73 states and 78 transitions. [2020-10-28 09:22:34,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 09:22:34,178 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 21 [2020-10-28 09:22:34,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:22:34,180 INFO L225 Difference]: With dead ends: 73 [2020-10-28 09:22:34,182 INFO L226 Difference]: Without dead ends: 56 [2020-10-28 09:22:34,184 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-28 09:22:34,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-28 09:22:34,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 30. [2020-10-28 09:22:34,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-28 09:22:34,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2020-10-28 09:22:34,203 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 21 [2020-10-28 09:22:34,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:22:34,203 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2020-10-28 09:22:34,204 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 09:22:34,204 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2020-10-28 09:22:34,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-28 09:22:34,209 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:22:34,209 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:22:34,210 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 09:22:34,210 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:22:34,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:22:34,211 INFO L82 PathProgramCache]: Analyzing trace with hash -1354504774, now seen corresponding path program 2 times [2020-10-28 09:22:34,211 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:22:34,211 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [469203574] [2020-10-28 09:22:34,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:22:34,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:22:34,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:22:34,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:22:34,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:22:37,600 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:22:37,601 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-28 09:22:37,601 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:22:37,601 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3346 [2020-10-28 09:22:37,601 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:22:37,602 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:22:37,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 09:22:37,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-28 09:22:37,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 09:22:37,602 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:22:37,667 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:22:37,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:22:37,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:22:37,677 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:22:37,677 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:22:37,677 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:22:37,678 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 09:22:37,678 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:22:37,678 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:22:37,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:22:37,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:22:37,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:22:37,679 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:22:37,684 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-28 09:22:37,685 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [469203574] [2020-10-28 09:22:37,685 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:22:37,685 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 09:22:37,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106663210] [2020-10-28 09:22:37,686 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 09:22:37,686 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:22:37,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 09:22:37,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-28 09:22:37,688 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand 6 states. [2020-10-28 09:22:38,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:22:38,016 INFO L93 Difference]: Finished difference Result 91 states and 96 transitions. [2020-10-28 09:22:38,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 09:22:38,016 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 25 [2020-10-28 09:22:38,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:22:38,018 INFO L225 Difference]: With dead ends: 91 [2020-10-28 09:22:38,018 INFO L226 Difference]: Without dead ends: 72 [2020-10-28 09:22:38,019 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-28 09:22:38,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-28 09:22:38,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 34. [2020-10-28 09:22:38,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-28 09:22:38,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2020-10-28 09:22:38,028 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 25 [2020-10-28 09:22:38,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:22:38,028 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2020-10-28 09:22:38,028 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 09:22:38,029 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2020-10-28 09:22:38,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-28 09:22:38,029 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:22:38,030 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:22:38,030 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 09:22:38,030 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:22:38,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:22:38,031 INFO L82 PathProgramCache]: Analyzing trace with hash 1478765238, now seen corresponding path program 3 times [2020-10-28 09:22:38,031 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:22:38,031 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [764015113] [2020-10-28 09:22:38,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:22:38,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:22:38,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:22:38,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:22:38,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:22:42,997 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:22:42,997 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-28 09:22:42,998 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:22:42,998 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4946 [2020-10-28 09:22:42,998 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:22:42,998 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:22:42,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 09:22:42,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-28 09:22:42,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-28 09:22:42,999 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:22:43,074 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:22:43,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:22:43,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:22:43,083 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:22:43,084 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:22:43,084 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:22:43,084 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 09:22:43,084 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:22:43,085 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:22:43,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:22:43,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:22:43,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:22:43,085 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:22:43,091 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-28 09:22:43,091 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [764015113] [2020-10-28 09:22:43,091 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:22:43,092 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 09:22:43,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547136113] [2020-10-28 09:22:43,093 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 09:22:43,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:22:43,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 09:22:43,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-28 09:22:43,100 INFO L87 Difference]: Start difference. First operand 34 states and 36 transitions. Second operand 7 states. [2020-10-28 09:22:43,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:22:43,512 INFO L93 Difference]: Finished difference Result 109 states and 114 transitions. [2020-10-28 09:22:43,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 09:22:43,512 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 29 [2020-10-28 09:22:43,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:22:43,514 INFO L225 Difference]: With dead ends: 109 [2020-10-28 09:22:43,514 INFO L226 Difference]: Without dead ends: 88 [2020-10-28 09:22:43,515 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2020-10-28 09:22:43,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-28 09:22:43,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 38. [2020-10-28 09:22:43,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-28 09:22:43,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2020-10-28 09:22:43,532 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 29 [2020-10-28 09:22:43,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:22:43,533 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2020-10-28 09:22:43,533 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 09:22:43,533 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2020-10-28 09:22:43,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-28 09:22:43,534 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:22:43,534 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:22:43,534 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 09:22:43,535 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:22:43,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:22:43,535 INFO L82 PathProgramCache]: Analyzing trace with hash -1598651982, now seen corresponding path program 4 times [2020-10-28 09:22:43,536 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:22:43,536 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2021353842] [2020-10-28 09:22:43,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:22:43,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:22:43,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:22:43,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:22:43,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:22:48,559 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:22:48,560 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-28 09:22:48,560 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:22:48,560 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-28 09:22:48,561 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:22:48,561 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:22:48,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 09:22:48,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-28 09:22:48,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-28 09:22:48,562 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:22:48,659 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:22:48,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:22:48,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:22:48,677 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:22:48,678 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:22:48,678 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:22:48,678 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-28 09:22:48,679 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:22:48,679 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:22:48,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:22:48,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:22:48,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:22:48,683 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-28 09:22:48,698 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-28 09:22:48,698 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2021353842] [2020-10-28 09:22:48,699 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:22:48,700 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 09:22:48,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995720096] [2020-10-28 09:22:48,701 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 09:22:48,701 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:22:48,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 09:22:48,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-28 09:22:48,704 INFO L87 Difference]: Start difference. First operand 38 states and 40 transitions. Second operand 8 states. [2020-10-28 09:22:49,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:22:49,252 INFO L93 Difference]: Finished difference Result 127 states and 132 transitions. [2020-10-28 09:22:49,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 09:22:49,253 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 33 [2020-10-28 09:22:49,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:22:49,254 INFO L225 Difference]: With dead ends: 127 [2020-10-28 09:22:49,254 INFO L226 Difference]: Without dead ends: 104 [2020-10-28 09:22:49,258 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2020-10-28 09:22:49,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-10-28 09:22:49,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 42. [2020-10-28 09:22:49,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-28 09:22:49,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 44 transitions. [2020-10-28 09:22:49,279 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 44 transitions. Word has length 33 [2020-10-28 09:22:49,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:22:49,280 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 44 transitions. [2020-10-28 09:22:49,280 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 09:22:49,280 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 44 transitions. [2020-10-28 09:22:49,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-28 09:22:49,284 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:22:49,285 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:22:49,285 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 09:22:49,285 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:22:49,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:22:49,286 INFO L82 PathProgramCache]: Analyzing trace with hash -869930322, now seen corresponding path program 5 times [2020-10-28 09:22:49,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:22:49,286 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1450974017] [2020-10-28 09:22:49,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:22:49,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:22:49,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:22:49,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:22:49,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:22:54,324 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:22:54,324 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-28 09:22:54,324 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:22:54,325 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-28 09:22:54,325 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:22:54,325 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:22:54,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 09:22:54,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-28 09:22:54,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-28 09:22:54,326 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:22:54,536 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:22:54,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:22:54,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:22:54,552 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:22:54,553 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:22:54,553 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:22:54,553 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-28 09:22:54,553 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:22:54,554 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:22:54,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:22:54,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:22:54,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:22:54,554 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:22:54,562 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-10-28 09:22:54,563 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1450974017] [2020-10-28 09:22:54,564 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:22:54,564 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-28 09:22:54,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021221432] [2020-10-28 09:22:54,565 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 09:22:54,565 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:22:54,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 09:22:54,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-28 09:22:54,566 INFO L87 Difference]: Start difference. First operand 42 states and 44 transitions. Second operand 9 states. [2020-10-28 09:22:55,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:22:55,118 INFO L93 Difference]: Finished difference Result 54 states and 56 transitions. [2020-10-28 09:22:55,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 09:22:55,119 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 37 [2020-10-28 09:22:55,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:22:55,120 INFO L225 Difference]: With dead ends: 54 [2020-10-28 09:22:55,120 INFO L226 Difference]: Without dead ends: 50 [2020-10-28 09:22:55,122 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2020-10-28 09:22:55,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-28 09:22:55,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 48. [2020-10-28 09:22:55,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-28 09:22:55,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 50 transitions. [2020-10-28 09:22:55,141 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 50 transitions. Word has length 37 [2020-10-28 09:22:55,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:22:55,144 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 50 transitions. [2020-10-28 09:22:55,144 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 09:22:55,144 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 50 transitions. [2020-10-28 09:22:55,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-28 09:22:55,150 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:22:55,151 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:22:55,155 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 09:22:55,156 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:22:55,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:22:55,156 INFO L82 PathProgramCache]: Analyzing trace with hash 557339400, now seen corresponding path program 1 times [2020-10-28 09:22:55,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:22:55,157 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1340934582] [2020-10-28 09:22:55,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:22:55,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:22:55,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:22:55,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:22:55,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:22:55,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:22:57,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:23:00,202 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:23:00,203 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-28 09:23:00,203 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 09:23:00,203 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-28 09:23:00,203 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:23:00,204 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:23:00,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 09:23:00,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:23:00,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-28 09:23:00,205 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:23:00,311 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:23:00,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:23:00,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:23:00,322 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:23:00,323 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:23:00,323 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:23:00,323 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 09:23:00,324 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:23:00,324 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:23:00,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:23:00,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:23:00,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:23:00,325 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:23:00,330 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-10-28 09:23:00,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:23:00,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:23:00,337 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:23:00,337 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:23:00,338 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:23:00,338 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:23:00,338 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:23:00,338 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:23:00,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:23:00,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:23:00,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:23:00,340 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:23:00,347 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 2 proven. 25 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-10-28 09:23:00,347 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1340934582] [2020-10-28 09:23:00,348 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:23:00,348 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-28 09:23:00,349 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544343847] [2020-10-28 09:23:00,351 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 09:23:00,351 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:23:00,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 09:23:00,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-28 09:23:00,356 INFO L87 Difference]: Start difference. First operand 48 states and 50 transitions. Second operand 9 states. [2020-10-28 09:23:00,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:23:00,926 INFO L93 Difference]: Finished difference Result 147 states and 152 transitions. [2020-10-28 09:23:00,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-28 09:23:00,927 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 45 [2020-10-28 09:23:00,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:23:00,929 INFO L225 Difference]: With dead ends: 147 [2020-10-28 09:23:00,929 INFO L226 Difference]: Without dead ends: 116 [2020-10-28 09:23:00,931 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2020-10-28 09:23:00,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-10-28 09:23:00,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 52. [2020-10-28 09:23:00,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-28 09:23:00,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 54 transitions. [2020-10-28 09:23:00,955 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 54 transitions. Word has length 45 [2020-10-28 09:23:00,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:23:00,955 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 54 transitions. [2020-10-28 09:23:00,955 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 09:23:00,956 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 54 transitions. [2020-10-28 09:23:00,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-28 09:23:00,959 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:23:00,960 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:23:00,961 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 09:23:00,961 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:23:00,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:23:00,962 INFO L82 PathProgramCache]: Analyzing trace with hash -42790396, now seen corresponding path program 2 times [2020-10-28 09:23:00,962 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:23:00,963 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [126380784] [2020-10-28 09:23:00,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:23:00,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:23:01,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:23:01,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:23:01,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:23:01,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:23:06,002 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:23:06,002 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-28 09:23:06,002 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 09:23:06,002 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-28 09:23:06,003 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:23:06,003 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:23:06,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 09:23:06,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:23:06,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-28 09:23:06,004 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:23:06,130 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:23:06,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:23:06,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:23:06,138 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:23:06,139 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:23:06,139 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:23:06,139 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 09:23:06,139 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:23:06,139 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:23:06,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:23:06,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:23:06,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:23:06,140 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:23:06,143 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-10-28 09:23:06,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:23:06,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:23:06,146 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:23:06,147 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:23:06,147 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:23:06,147 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:23:06,147 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:23:06,147 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:23:06,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:23:06,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:23:06,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:23:06,148 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:23:06,155 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 2 proven. 36 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2020-10-28 09:23:06,155 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [126380784] [2020-10-28 09:23:06,155 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:23:06,155 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 09:23:06,156 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491389279] [2020-10-28 09:23:06,157 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 09:23:06,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:23:06,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 09:23:06,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-28 09:23:06,158 INFO L87 Difference]: Start difference. First operand 52 states and 54 transitions. Second operand 10 states. [2020-10-28 09:23:06,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:23:06,957 INFO L93 Difference]: Finished difference Result 165 states and 170 transitions. [2020-10-28 09:23:06,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-28 09:23:06,958 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 49 [2020-10-28 09:23:06,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:23:06,959 INFO L225 Difference]: With dead ends: 165 [2020-10-28 09:23:06,959 INFO L226 Difference]: Without dead ends: 132 [2020-10-28 09:23:06,960 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=108, Invalid=164, Unknown=0, NotChecked=0, Total=272 [2020-10-28 09:23:06,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-10-28 09:23:06,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 56. [2020-10-28 09:23:06,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-28 09:23:06,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 58 transitions. [2020-10-28 09:23:06,972 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 58 transitions. Word has length 49 [2020-10-28 09:23:06,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:23:06,972 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 58 transitions. [2020-10-28 09:23:06,972 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 09:23:06,973 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 58 transitions. [2020-10-28 09:23:06,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-28 09:23:06,973 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:23:06,973 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:23:06,974 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 09:23:06,974 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:23:06,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:23:06,974 INFO L82 PathProgramCache]: Analyzing trace with hash -735124736, now seen corresponding path program 3 times [2020-10-28 09:23:06,975 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:23:06,975 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1510156923] [2020-10-28 09:23:06,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:23:07,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:23:07,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:23:07,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:23:07,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:23:08,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:23:12,001 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:23:12,001 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-28 09:23:12,002 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 09:23:12,002 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-28 09:23:12,002 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:23:12,002 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:23:12,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 09:23:12,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-10-28 09:23:12,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-28 09:23:12,003 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:23:12,161 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:23:12,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:23:12,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:23:12,168 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:23:12,169 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:23:12,169 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:23:12,169 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 09:23:12,169 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:23:12,170 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:23:12,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:23:12,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:23:12,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:23:12,170 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:23:12,173 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-10-28 09:23:12,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:23:12,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:23:12,181 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:23:12,181 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:23:12,181 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:23:12,181 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:23:12,186 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:23:12,186 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:23:12,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:23:12,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:23:12,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:23:12,187 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:23:12,192 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 2 proven. 49 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2020-10-28 09:23:12,193 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1510156923] [2020-10-28 09:23:12,193 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:23:12,193 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-28 09:23:12,193 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227423767] [2020-10-28 09:23:12,194 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 09:23:12,194 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:23:12,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 09:23:12,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-28 09:23:12,195 INFO L87 Difference]: Start difference. First operand 56 states and 58 transitions. Second operand 11 states. [2020-10-28 09:23:13,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:23:13,159 INFO L93 Difference]: Finished difference Result 183 states and 188 transitions. [2020-10-28 09:23:13,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-28 09:23:13,160 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 53 [2020-10-28 09:23:13,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:23:13,162 INFO L225 Difference]: With dead ends: 183 [2020-10-28 09:23:13,162 INFO L226 Difference]: Without dead ends: 148 [2020-10-28 09:23:13,164 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=135, Invalid=207, Unknown=0, NotChecked=0, Total=342 [2020-10-28 09:23:13,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-10-28 09:23:13,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 60. [2020-10-28 09:23:13,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-28 09:23:13,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 62 transitions. [2020-10-28 09:23:13,176 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 62 transitions. Word has length 53 [2020-10-28 09:23:13,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:23:13,176 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 62 transitions. [2020-10-28 09:23:13,176 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 09:23:13,176 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 62 transitions. [2020-10-28 09:23:13,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-28 09:23:13,177 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:23:13,177 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:23:13,178 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 09:23:13,178 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:23:13,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:23:13,178 INFO L82 PathProgramCache]: Analyzing trace with hash 840353276, now seen corresponding path program 4 times [2020-10-28 09:23:13,179 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:23:13,179 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1447829511] [2020-10-28 09:23:13,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:23:13,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:23:13,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:23:13,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:23:13,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:23:15,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:23:18,206 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:23:18,207 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-28 09:23:18,207 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 09:23:18,207 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-28 09:23:18,207 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:23:18,207 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:23:18,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 09:23:18,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-28 09:23:18,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-28 09:23:18,208 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:23:18,375 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:23:18,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:23:18,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:23:18,383 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:23:18,383 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:23:18,384 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:23:18,384 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:23:18,384 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:23:18,384 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:23:18,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:23:18,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:23:18,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:23:18,385 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:23:18,387 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-10-28 09:23:18,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:23:18,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:23:18,391 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:23:18,391 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:23:18,391 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:23:18,391 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:23:18,392 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:23:18,392 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:23:18,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:23:18,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:23:18,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:23:18,393 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:23:18,398 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 2 proven. 64 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2020-10-28 09:23:18,399 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1447829511] [2020-10-28 09:23:18,399 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:23:18,399 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 09:23:18,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880341436] [2020-10-28 09:23:18,400 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 09:23:18,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:23:18,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 09:23:18,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-28 09:23:18,401 INFO L87 Difference]: Start difference. First operand 60 states and 62 transitions. Second operand 12 states. [2020-10-28 09:23:19,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:23:19,372 INFO L93 Difference]: Finished difference Result 201 states and 206 transitions. [2020-10-28 09:23:19,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-28 09:23:19,372 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 57 [2020-10-28 09:23:19,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:23:19,374 INFO L225 Difference]: With dead ends: 201 [2020-10-28 09:23:19,376 INFO L226 Difference]: Without dead ends: 164 [2020-10-28 09:23:19,378 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=165, Invalid=255, Unknown=0, NotChecked=0, Total=420 [2020-10-28 09:23:19,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2020-10-28 09:23:19,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 64. [2020-10-28 09:23:19,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-28 09:23:19,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 66 transitions. [2020-10-28 09:23:19,390 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 66 transitions. Word has length 57 [2020-10-28 09:23:19,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:23:19,390 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 66 transitions. [2020-10-28 09:23:19,391 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 09:23:19,391 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 66 transitions. [2020-10-28 09:23:19,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-28 09:23:19,391 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:23:19,391 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:23:19,392 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-28 09:23:19,392 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:23:19,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:23:19,392 INFO L82 PathProgramCache]: Analyzing trace with hash -2057979144, now seen corresponding path program 5 times [2020-10-28 09:23:19,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:23:19,393 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1759895880] [2020-10-28 09:23:19,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:23:19,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:23:19,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:23:19,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:23:19,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:23:21,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:23:24,429 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:23:24,430 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-28 09:23:24,430 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 09:23:24,430 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-28 09:23:24,430 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:23:24,430 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:23:24,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 09:23:24,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-28 09:23:24,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-28 09:23:24,431 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:23:24,595 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:23:24,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:23:24,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:23:24,604 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:23:24,604 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:23:24,604 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:23:24,605 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:23:24,605 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:23:24,605 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:23:24,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:23:24,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:23:24,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:23:24,605 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:23:24,608 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-10-28 09:23:24,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:23:24,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:23:24,610 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:23:24,610 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:23:24,610 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:23:24,611 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:23:24,611 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:23:24,611 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:23:24,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:23:24,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:23:24,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:23:24,611 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:23:24,617 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 2 proven. 81 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2020-10-28 09:23:24,618 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1759895880] [2020-10-28 09:23:24,618 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:23:24,618 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-28 09:23:24,619 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204462475] [2020-10-28 09:23:24,619 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-28 09:23:24,619 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:23:24,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-28 09:23:24,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-28 09:23:24,620 INFO L87 Difference]: Start difference. First operand 64 states and 66 transitions. Second operand 13 states. [2020-10-28 09:23:25,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:23:25,742 INFO L93 Difference]: Finished difference Result 219 states and 224 transitions. [2020-10-28 09:23:25,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-28 09:23:25,742 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 61 [2020-10-28 09:23:25,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:23:25,746 INFO L225 Difference]: With dead ends: 219 [2020-10-28 09:23:25,746 INFO L226 Difference]: Without dead ends: 180 [2020-10-28 09:23:25,747 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=198, Invalid=308, Unknown=0, NotChecked=0, Total=506 [2020-10-28 09:23:25,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2020-10-28 09:23:25,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 68. [2020-10-28 09:23:25,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-28 09:23:25,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 70 transitions. [2020-10-28 09:23:25,770 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 70 transitions. Word has length 61 [2020-10-28 09:23:25,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:23:25,771 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 70 transitions. [2020-10-28 09:23:25,771 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-28 09:23:25,771 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 70 transitions. [2020-10-28 09:23:25,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-28 09:23:25,771 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:23:25,772 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:23:25,772 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-28 09:23:25,773 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:23:25,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:23:25,774 INFO L82 PathProgramCache]: Analyzing trace with hash -1651064332, now seen corresponding path program 6 times [2020-10-28 09:23:25,774 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:23:25,775 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1982040257] [2020-10-28 09:23:25,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:23:25,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:23:25,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:23:25,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:23:26,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:23:27,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:23:30,805 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:23:30,805 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-28 09:23:30,805 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 09:23:30,805 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-28 09:23:30,805 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:23:30,805 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:23:30,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 09:23:30,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-28 09:23:30,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-28 09:23:30,806 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:23:31,023 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:23:31,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:23:31,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:23:31,030 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:23:31,030 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:23:31,031 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:23:31,031 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:23:31,031 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:23:31,032 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:23:31,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:23:31,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:23:31,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:23:31,033 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:23:31,036 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-10-28 09:23:31,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:23:31,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:23:31,041 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:23:31,041 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:23:31,042 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:23:31,042 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:23:31,042 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:23:31,042 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:23:31,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:23:31,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:23:31,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:23:31,043 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:23:31,056 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 2 proven. 100 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2020-10-28 09:23:31,056 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1982040257] [2020-10-28 09:23:31,057 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:23:31,057 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-28 09:23:31,057 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374638208] [2020-10-28 09:23:31,058 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-28 09:23:31,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:23:31,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-28 09:23:31,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-28 09:23:31,059 INFO L87 Difference]: Start difference. First operand 68 states and 70 transitions. Second operand 14 states. [2020-10-28 09:23:32,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:23:32,281 INFO L93 Difference]: Finished difference Result 237 states and 242 transitions. [2020-10-28 09:23:32,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-28 09:23:32,282 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 65 [2020-10-28 09:23:32,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:23:32,284 INFO L225 Difference]: With dead ends: 237 [2020-10-28 09:23:32,284 INFO L226 Difference]: Without dead ends: 196 [2020-10-28 09:23:32,285 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=234, Invalid=366, Unknown=0, NotChecked=0, Total=600 [2020-10-28 09:23:32,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-10-28 09:23:32,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 72. [2020-10-28 09:23:32,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-28 09:23:32,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 74 transitions. [2020-10-28 09:23:32,299 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 74 transitions. Word has length 65 [2020-10-28 09:23:32,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:23:32,299 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 74 transitions. [2020-10-28 09:23:32,299 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-28 09:23:32,299 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 74 transitions. [2020-10-28 09:23:32,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-28 09:23:32,300 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:23:32,300 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:23:32,300 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-28 09:23:32,301 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:23:32,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:23:32,301 INFO L82 PathProgramCache]: Analyzing trace with hash 738515696, now seen corresponding path program 7 times [2020-10-28 09:23:32,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:23:32,302 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1411275421] [2020-10-28 09:23:32,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:23:32,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:23:32,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:23:32,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:23:32,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:23:34,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:23:37,329 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:23:37,330 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-28 09:23:37,330 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 09:23:37,330 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-28 09:23:37,330 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:23:37,330 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:23:37,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-28 09:23:37,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 35 [2020-10-28 09:23:37,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-28 09:23:37,331 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:23:37,522 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:23:37,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:23:37,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:23:37,532 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:23:37,533 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:23:37,533 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:23:37,533 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 09:23:37,533 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:23:37,534 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:23:37,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:23:37,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:23:37,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:23:37,535 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:23:37,539 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-10-28 09:23:37,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:23:37,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:23:37,547 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:23:37,547 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:23:37,547 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:23:37,547 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:23:37,548 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:23:37,548 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:23:37,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:23:37,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:23:37,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:23:37,549 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:23:37,562 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 2 proven. 121 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2020-10-28 09:23:37,564 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1411275421] [2020-10-28 09:23:37,564 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:23:37,565 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-28 09:23:37,565 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729672324] [2020-10-28 09:23:37,587 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-28 09:23:37,588 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:23:37,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-28 09:23:37,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-28 09:23:37,591 INFO L87 Difference]: Start difference. First operand 72 states and 74 transitions. Second operand 15 states. [2020-10-28 09:23:38,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:23:38,972 INFO L93 Difference]: Finished difference Result 255 states and 260 transitions. [2020-10-28 09:23:38,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-28 09:23:38,973 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 69 [2020-10-28 09:23:38,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:23:38,975 INFO L225 Difference]: With dead ends: 255 [2020-10-28 09:23:38,975 INFO L226 Difference]: Without dead ends: 212 [2020-10-28 09:23:38,976 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=273, Invalid=429, Unknown=0, NotChecked=0, Total=702 [2020-10-28 09:23:38,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2020-10-28 09:23:38,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 76. [2020-10-28 09:23:38,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-28 09:23:38,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 78 transitions. [2020-10-28 09:23:38,991 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 78 transitions. Word has length 69 [2020-10-28 09:23:38,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:23:38,991 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 78 transitions. [2020-10-28 09:23:38,991 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-28 09:23:38,991 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 78 transitions. [2020-10-28 09:23:38,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-28 09:23:38,992 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:23:38,992 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:23:38,992 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-28 09:23:38,993 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:23:38,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:23:38,993 INFO L82 PathProgramCache]: Analyzing trace with hash 1128990188, now seen corresponding path program 8 times [2020-10-28 09:23:38,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:23:38,993 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1596092845] [2020-10-28 09:23:38,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:23:39,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:23:39,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:23:39,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:23:39,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:23:41,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:23:44,091 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:23:44,091 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-28 09:23:44,091 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 09:23:44,091 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5070 [2020-10-28 09:23:44,092 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:23:44,092 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:23:44,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-28 09:23:44,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 37 [2020-10-28 09:23:44,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-28 09:23:44,092 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:23:44,344 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:23:44,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:23:44,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:23:44,354 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:23:44,354 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:23:44,354 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:23:44,354 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 09:23:44,354 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:23:44,355 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:23:44,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:23:44,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:23:44,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:23:44,355 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:23:44,358 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2020-10-28 09:23:44,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:23:44,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:23:44,371 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:23:44,371 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:23:44,371 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:23:44,371 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:23:44,371 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:23:44,372 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:23:44,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:23:44,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:23:44,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:23:44,372 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:23:44,382 INFO L134 CoverageAnalysis]: Checked inductivity of 292 backedges. 2 proven. 144 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2020-10-28 09:23:44,382 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1596092845] [2020-10-28 09:23:44,383 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:23:44,383 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-28 09:23:44,383 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827192218] [2020-10-28 09:23:44,384 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-28 09:23:44,384 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:23:44,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-28 09:23:44,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-28 09:23:44,386 INFO L87 Difference]: Start difference. First operand 76 states and 78 transitions. Second operand 16 states. [2020-10-28 09:23:45,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:23:45,745 INFO L93 Difference]: Finished difference Result 273 states and 278 transitions. [2020-10-28 09:23:45,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-28 09:23:45,746 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 73 [2020-10-28 09:23:45,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:23:45,748 INFO L225 Difference]: With dead ends: 273 [2020-10-28 09:23:45,748 INFO L226 Difference]: Without dead ends: 228 [2020-10-28 09:23:45,754 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=315, Invalid=497, Unknown=0, NotChecked=0, Total=812 [2020-10-28 09:23:45,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2020-10-28 09:23:45,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 80. [2020-10-28 09:23:45,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-28 09:23:45,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 82 transitions. [2020-10-28 09:23:45,780 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 82 transitions. Word has length 73 [2020-10-28 09:23:45,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:23:45,780 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 82 transitions. [2020-10-28 09:23:45,780 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-28 09:23:45,780 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 82 transitions. [2020-10-28 09:23:45,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-28 09:23:45,785 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:23:45,785 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:23:45,786 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-28 09:23:45,786 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:23:45,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:23:45,786 INFO L82 PathProgramCache]: Analyzing trace with hash -678149400, now seen corresponding path program 9 times [2020-10-28 09:23:45,787 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:23:45,787 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1385109602] [2020-10-28 09:23:45,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:23:45,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:23:45,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:23:45,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:23:47,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:23:52,154 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:23:52,154 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-28 09:23:52,154 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:23:52,155 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6330 [2020-10-28 09:23:52,155 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:23:52,155 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:23:52,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-28 09:23:52,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:23:52,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-28 09:23:52,155 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:23:52,389 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:23:52,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:23:52,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:23:52,398 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:23:52,398 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:23:52,398 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:23:52,398 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 09:23:52,398 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:23:52,399 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:23:52,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:23:52,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:23:52,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:23:52,399 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:23:52,405 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-10-28 09:23:52,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:23:52,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:23:52,409 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:23:52,409 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:23:52,409 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:23:52,409 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:23:52,409 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:23:52,410 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:23:52,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:23:52,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:23:52,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:23:52,410 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:23:52,420 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 2 proven. 169 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2020-10-28 09:23:52,420 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1385109602] [2020-10-28 09:23:52,424 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:23:52,424 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-28 09:23:52,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663922916] [2020-10-28 09:23:52,424 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-28 09:23:52,425 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:23:52,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-28 09:23:52,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-28 09:23:52,426 INFO L87 Difference]: Start difference. First operand 80 states and 82 transitions. Second operand 17 states. [2020-10-28 09:23:53,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:23:53,984 INFO L93 Difference]: Finished difference Result 291 states and 296 transitions. [2020-10-28 09:23:53,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-28 09:23:53,985 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 77 [2020-10-28 09:23:53,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:23:53,988 INFO L225 Difference]: With dead ends: 291 [2020-10-28 09:23:53,988 INFO L226 Difference]: Without dead ends: 244 [2020-10-28 09:23:53,989 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=360, Invalid=570, Unknown=0, NotChecked=0, Total=930 [2020-10-28 09:23:53,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2020-10-28 09:23:54,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 84. [2020-10-28 09:23:54,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-28 09:23:54,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 86 transitions. [2020-10-28 09:23:54,005 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 86 transitions. Word has length 77 [2020-10-28 09:23:54,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:23:54,005 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 86 transitions. [2020-10-28 09:23:54,005 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-28 09:23:54,005 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 86 transitions. [2020-10-28 09:23:54,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-28 09:23:54,006 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:23:54,006 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:23:54,006 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-28 09:23:54,006 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:23:54,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:23:54,007 INFO L82 PathProgramCache]: Analyzing trace with hash 1049334244, now seen corresponding path program 10 times [2020-10-28 09:23:54,007 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:23:54,007 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [401248895] [2020-10-28 09:23:54,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:23:54,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:23:54,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:23:54,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:23:55,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:23:58,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:24:01,320 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:24:01,320 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-10-28 09:24:01,321 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 09:24:01,321 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7288 [2020-10-28 09:24:01,321 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:24:01,321 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:24:01,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-28 09:24:01,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 41 [2020-10-28 09:24:01,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-28 09:24:01,322 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:24:01,583 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:24:01,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:24:01,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:24:01,590 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:24:01,591 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:24:01,591 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:24:01,591 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 09:24:01,591 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:24:01,591 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:24:01,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:24:01,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:24:01,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:24:01,592 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:24:01,595 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-10-28 09:24:01,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:24:01,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:24:01,597 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:24:01,598 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:24:01,598 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:24:01,598 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:24:01,598 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:24:01,598 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:24:01,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:24:01,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:24:01,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:24:01,599 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:24:01,607 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 2 proven. 196 refuted. 0 times theorem prover too weak. 198 trivial. 0 not checked. [2020-10-28 09:24:01,608 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [401248895] [2020-10-28 09:24:01,608 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:24:01,608 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-28 09:24:01,608 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712839064] [2020-10-28 09:24:01,609 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-28 09:24:01,609 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:24:01,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-28 09:24:01,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-28 09:24:01,610 INFO L87 Difference]: Start difference. First operand 84 states and 86 transitions. Second operand 18 states. [2020-10-28 09:24:03,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:24:03,258 INFO L93 Difference]: Finished difference Result 309 states and 314 transitions. [2020-10-28 09:24:03,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-28 09:24:03,258 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 81 [2020-10-28 09:24:03,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:24:03,262 INFO L225 Difference]: With dead ends: 309 [2020-10-28 09:24:03,262 INFO L226 Difference]: Without dead ends: 260 [2020-10-28 09:24:03,263 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=408, Invalid=648, Unknown=0, NotChecked=0, Total=1056 [2020-10-28 09:24:03,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2020-10-28 09:24:03,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 88. [2020-10-28 09:24:03,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-28 09:24:03,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 90 transitions. [2020-10-28 09:24:03,278 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 90 transitions. Word has length 81 [2020-10-28 09:24:03,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:24:03,279 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 90 transitions. [2020-10-28 09:24:03,279 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-28 09:24:03,279 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 90 transitions. [2020-10-28 09:24:03,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-28 09:24:03,279 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:24:03,279 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:24:03,280 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-28 09:24:03,280 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:24:03,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:24:03,280 INFO L82 PathProgramCache]: Analyzing trace with hash -1352928544, now seen corresponding path program 11 times [2020-10-28 09:24:03,280 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:24:03,281 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [237403591] [2020-10-28 09:24:03,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:24:03,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:24:03,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:24:03,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:24:05,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:24:13,243 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:24:13,243 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 97 [2020-10-28 09:24:13,243 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:24:13,243 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9932 [2020-10-28 09:24:13,244 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:24:13,244 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:24:13,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-28 09:24:13,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:24:13,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-28 09:24:13,244 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:24:13,523 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:24:13,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:24:13,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:24:13,528 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:24:13,529 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:24:13,529 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:24:13,529 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:24:13,529 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:24:13,529 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:24:13,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:24:13,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:24:13,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:24:13,529 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:24:13,531 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-10-28 09:24:13,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:24:13,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:24:13,533 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:24:13,533 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:24:13,533 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:24:13,534 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:24:13,534 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:24:13,534 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:24:13,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:24:13,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:24:13,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:24:13,534 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:24:13,540 INFO L134 CoverageAnalysis]: Checked inductivity of 454 backedges. 2 proven. 225 refuted. 0 times theorem prover too weak. 227 trivial. 0 not checked. [2020-10-28 09:24:13,541 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [237403591] [2020-10-28 09:24:13,541 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:24:13,541 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-28 09:24:13,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614449799] [2020-10-28 09:24:13,542 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-28 09:24:13,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:24:13,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-28 09:24:13,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-28 09:24:13,543 INFO L87 Difference]: Start difference. First operand 88 states and 90 transitions. Second operand 19 states. [2020-10-28 09:24:15,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:24:15,374 INFO L93 Difference]: Finished difference Result 327 states and 332 transitions. [2020-10-28 09:24:15,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-28 09:24:15,375 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 85 [2020-10-28 09:24:15,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:24:15,377 INFO L225 Difference]: With dead ends: 327 [2020-10-28 09:24:15,378 INFO L226 Difference]: Without dead ends: 276 [2020-10-28 09:24:15,379 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=459, Invalid=731, Unknown=0, NotChecked=0, Total=1190 [2020-10-28 09:24:15,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2020-10-28 09:24:15,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 92. [2020-10-28 09:24:15,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-28 09:24:15,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 94 transitions. [2020-10-28 09:24:15,396 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 94 transitions. Word has length 85 [2020-10-28 09:24:15,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:24:15,396 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 94 transitions. [2020-10-28 09:24:15,396 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-28 09:24:15,396 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 94 transitions. [2020-10-28 09:24:15,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-10-28 09:24:15,397 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:24:15,397 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:24:15,397 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-28 09:24:15,397 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:24:15,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:24:15,398 INFO L82 PathProgramCache]: Analyzing trace with hash -1028626980, now seen corresponding path program 12 times [2020-10-28 09:24:15,398 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:24:15,398 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1616183411] [2020-10-28 09:24:15,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:24:15,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:24:15,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:24:15,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:24:18,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:24:26,278 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:24:26,278 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-28 09:24:26,278 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:24:26,279 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10850 [2020-10-28 09:24:26,279 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:24:26,279 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:24:26,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-28 09:24:26,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 45 [2020-10-28 09:24:26,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-28 09:24:26,279 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:24:26,591 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:24:26,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:24:26,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:24:26,597 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:24:26,597 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:24:26,597 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:24:26,597 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:24:26,597 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:24:26,598 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:24:26,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:24:26,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:24:26,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:24:26,598 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:24:26,600 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-10-28 09:24:26,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:24:26,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:24:26,602 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:24:26,602 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:24:26,603 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:24:26,603 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:24:26,603 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:24:26,603 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:24:26,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:24:26,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:24:26,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:24:26,603 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:24:26,610 INFO L134 CoverageAnalysis]: Checked inductivity of 516 backedges. 2 proven. 256 refuted. 0 times theorem prover too weak. 258 trivial. 0 not checked. [2020-10-28 09:24:26,610 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1616183411] [2020-10-28 09:24:26,611 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:24:26,611 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-28 09:24:26,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446215868] [2020-10-28 09:24:26,611 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-28 09:24:26,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:24:26,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-28 09:24:26,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-28 09:24:26,613 INFO L87 Difference]: Start difference. First operand 92 states and 94 transitions. Second operand 20 states. [2020-10-28 09:24:28,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:24:28,579 INFO L93 Difference]: Finished difference Result 345 states and 350 transitions. [2020-10-28 09:24:28,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-28 09:24:28,579 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 89 [2020-10-28 09:24:28,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:24:28,582 INFO L225 Difference]: With dead ends: 345 [2020-10-28 09:24:28,582 INFO L226 Difference]: Without dead ends: 292 [2020-10-28 09:24:28,583 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=513, Invalid=819, Unknown=0, NotChecked=0, Total=1332 [2020-10-28 09:24:28,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2020-10-28 09:24:28,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 96. [2020-10-28 09:24:28,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-10-28 09:24:28,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 98 transitions. [2020-10-28 09:24:28,601 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 98 transitions. Word has length 89 [2020-10-28 09:24:28,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:24:28,601 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 98 transitions. [2020-10-28 09:24:28,601 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-28 09:24:28,601 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 98 transitions. [2020-10-28 09:24:28,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-10-28 09:24:28,602 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:24:28,602 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:24:28,603 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-28 09:24:28,603 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:24:28,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:24:28,603 INFO L82 PathProgramCache]: Analyzing trace with hash -223089960, now seen corresponding path program 13 times [2020-10-28 09:24:28,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:24:28,604 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1691010581] [2020-10-28 09:24:28,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:24:28,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:24:28,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:24:28,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:24:30,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:24:36,774 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:24:36,774 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 105 [2020-10-28 09:24:36,774 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:24:36,774 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8134 [2020-10-28 09:24:36,775 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:24:36,775 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:24:36,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-28 09:24:36,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 47 [2020-10-28 09:24:36,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-28 09:24:36,775 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:24:37,130 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:24:37,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:24:37,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:24:37,137 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:24:37,137 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:24:37,137 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:24:37,137 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:24:37,137 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:24:37,138 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:24:37,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:24:37,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:24:37,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:24:37,138 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:24:37,141 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2020-10-28 09:24:37,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:24:37,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:24:37,143 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:24:37,143 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:24:37,144 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:24:37,144 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:24:37,144 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:24:37,144 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:24:37,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:24:37,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:24:37,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:24:37,145 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:24:37,154 INFO L134 CoverageAnalysis]: Checked inductivity of 582 backedges. 2 proven. 289 refuted. 0 times theorem prover too weak. 291 trivial. 0 not checked. [2020-10-28 09:24:37,154 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1691010581] [2020-10-28 09:24:37,154 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:24:37,155 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-28 09:24:37,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768390761] [2020-10-28 09:24:37,155 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-28 09:24:37,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:24:37,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-28 09:24:37,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-28 09:24:37,156 INFO L87 Difference]: Start difference. First operand 96 states and 98 transitions. Second operand 21 states. [2020-10-28 09:24:39,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:24:39,228 INFO L93 Difference]: Finished difference Result 363 states and 368 transitions. [2020-10-28 09:24:39,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-28 09:24:39,229 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 93 [2020-10-28 09:24:39,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:24:39,231 INFO L225 Difference]: With dead ends: 363 [2020-10-28 09:24:39,231 INFO L226 Difference]: Without dead ends: 308 [2020-10-28 09:24:39,233 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=570, Invalid=912, Unknown=0, NotChecked=0, Total=1482 [2020-10-28 09:24:39,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2020-10-28 09:24:39,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 100. [2020-10-28 09:24:39,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-10-28 09:24:39,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 102 transitions. [2020-10-28 09:24:39,252 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 102 transitions. Word has length 93 [2020-10-28 09:24:39,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:24:39,252 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 102 transitions. [2020-10-28 09:24:39,252 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-28 09:24:39,253 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 102 transitions. [2020-10-28 09:24:39,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-10-28 09:24:39,254 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:24:39,254 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:24:39,254 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-28 09:24:39,254 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:24:39,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:24:39,255 INFO L82 PathProgramCache]: Analyzing trace with hash 454132180, now seen corresponding path program 14 times [2020-10-28 09:24:39,255 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:24:39,255 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [291230900] [2020-10-28 09:24:39,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:24:39,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:24:39,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:24:39,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:24:43,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:24:48,658 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:24:48,658 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 109 [2020-10-28 09:24:48,658 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:24:48,658 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9367 [2020-10-28 09:24:48,658 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:24:48,659 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:24:48,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-28 09:24:48,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:24:48,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-28 09:24:48,659 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:24:49,034 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:24:49,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:24:49,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:24:49,039 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:24:49,040 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:24:49,040 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:24:49,040 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:24:49,040 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:24:49,040 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:24:49,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:24:49,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:24:49,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:24:49,041 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:24:49,042 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-10-28 09:24:49,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:24:49,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:24:49,045 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:24:49,045 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:24:49,045 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:24:49,045 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:24:49,045 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:24:49,045 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:24:49,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:24:49,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:24:49,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:24:49,046 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:24:49,055 INFO L134 CoverageAnalysis]: Checked inductivity of 652 backedges. 2 proven. 324 refuted. 0 times theorem prover too weak. 326 trivial. 0 not checked. [2020-10-28 09:24:49,055 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [291230900] [2020-10-28 09:24:49,055 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:24:49,056 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-28 09:24:49,056 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680871994] [2020-10-28 09:24:49,056 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-28 09:24:49,056 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:24:49,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-28 09:24:49,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-28 09:24:49,057 INFO L87 Difference]: Start difference. First operand 100 states and 102 transitions. Second operand 22 states. [2020-10-28 09:24:51,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:24:51,297 INFO L93 Difference]: Finished difference Result 381 states and 386 transitions. [2020-10-28 09:24:51,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-28 09:24:51,297 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 97 [2020-10-28 09:24:51,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:24:51,299 INFO L225 Difference]: With dead ends: 381 [2020-10-28 09:24:51,299 INFO L226 Difference]: Without dead ends: 324 [2020-10-28 09:24:51,300 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=630, Invalid=1010, Unknown=0, NotChecked=0, Total=1640 [2020-10-28 09:24:51,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2020-10-28 09:24:51,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 104. [2020-10-28 09:24:51,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-28 09:24:51,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 106 transitions. [2020-10-28 09:24:51,321 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 106 transitions. Word has length 97 [2020-10-28 09:24:51,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:24:51,321 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 106 transitions. [2020-10-28 09:24:51,321 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-28 09:24:51,321 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 106 transitions. [2020-10-28 09:24:51,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-10-28 09:24:51,322 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:24:51,322 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:24:51,322 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-28 09:24:51,323 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:24:51,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:24:51,323 INFO L82 PathProgramCache]: Analyzing trace with hash -118215984, now seen corresponding path program 15 times [2020-10-28 09:24:51,323 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:24:51,323 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1117272736] [2020-10-28 09:24:51,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:24:51,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:24:51,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:24:51,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:24:54,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:25:03,300 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:25:03,301 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 113 [2020-10-28 09:25:03,301 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:25:03,301 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11940 [2020-10-28 09:25:03,301 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:25:03,301 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:25:03,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-28 09:25:03,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 51 [2020-10-28 09:25:03,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-28 09:25:03,302 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:25:03,743 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:25:03,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:25:03,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:25:03,749 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:25:03,750 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:25:03,750 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:25:03,750 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:25:03,750 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:25:03,750 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:25:03,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:25:03,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:25:03,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:25:03,751 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:25:03,753 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2020-10-28 09:25:03,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:25:03,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:25:03,756 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:25:03,756 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:25:03,756 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:25:03,757 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:25:03,757 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:25:03,757 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:25:03,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:25:03,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:25:03,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:25:03,758 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:25:03,772 INFO L134 CoverageAnalysis]: Checked inductivity of 726 backedges. 2 proven. 361 refuted. 0 times theorem prover too weak. 363 trivial. 0 not checked. [2020-10-28 09:25:03,773 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1117272736] [2020-10-28 09:25:03,773 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:25:03,773 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-28 09:25:03,773 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607726185] [2020-10-28 09:25:03,774 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-28 09:25:03,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:25:03,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-28 09:25:03,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-28 09:25:03,775 INFO L87 Difference]: Start difference. First operand 104 states and 106 transitions. Second operand 23 states. [2020-10-28 09:25:06,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:25:06,188 INFO L93 Difference]: Finished difference Result 399 states and 404 transitions. [2020-10-28 09:25:06,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-28 09:25:06,191 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 101 [2020-10-28 09:25:06,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:25:06,193 INFO L225 Difference]: With dead ends: 399 [2020-10-28 09:25:06,193 INFO L226 Difference]: Without dead ends: 340 [2020-10-28 09:25:06,194 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=693, Invalid=1113, Unknown=0, NotChecked=0, Total=1806 [2020-10-28 09:25:06,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2020-10-28 09:25:06,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 108. [2020-10-28 09:25:06,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-10-28 09:25:06,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 110 transitions. [2020-10-28 09:25:06,217 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 110 transitions. Word has length 101 [2020-10-28 09:25:06,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:25:06,217 INFO L481 AbstractCegarLoop]: Abstraction has 108 states and 110 transitions. [2020-10-28 09:25:06,217 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-28 09:25:06,218 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 110 transitions. [2020-10-28 09:25:06,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-10-28 09:25:06,219 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:25:06,219 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:25:06,219 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-28 09:25:06,219 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:25:06,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:25:06,220 INFO L82 PathProgramCache]: Analyzing trace with hash -1425611316, now seen corresponding path program 16 times [2020-10-28 09:25:06,220 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:25:06,221 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1858390046] [2020-10-28 09:25:06,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:25:06,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:25:06,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:25:06,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:25:09,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:25:33,608 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:25:33,609 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 117 [2020-10-28 09:25:33,609 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:25:33,609 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27348 [2020-10-28 09:25:33,609 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:25:33,609 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:25:33,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-28 09:25:33,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:25:33,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-28 09:25:33,610 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:25:34,036 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:25:34,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:25:34,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:25:34,042 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:25:34,042 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:25:34,042 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:25:34,042 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:25:34,043 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:25:34,043 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:25:34,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:25:34,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:25:34,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:25:34,043 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:25:34,046 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2020-10-28 09:25:34,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:25:34,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:25:34,049 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:25:34,049 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:25:34,049 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:25:34,049 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:25:34,049 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:25:34,049 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:25:34,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:25:34,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:25:34,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:25:34,050 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:25:34,064 INFO L134 CoverageAnalysis]: Checked inductivity of 804 backedges. 2 proven. 400 refuted. 0 times theorem prover too weak. 402 trivial. 0 not checked. [2020-10-28 09:25:34,064 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1858390046] [2020-10-28 09:25:34,064 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:25:34,064 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-28 09:25:34,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467535299] [2020-10-28 09:25:34,067 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-28 09:25:34,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:25:34,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-28 09:25:34,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-28 09:25:34,069 INFO L87 Difference]: Start difference. First operand 108 states and 110 transitions. Second operand 24 states. [2020-10-28 09:25:36,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:25:36,675 INFO L93 Difference]: Finished difference Result 417 states and 422 transitions. [2020-10-28 09:25:36,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-28 09:25:36,676 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 105 [2020-10-28 09:25:36,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:25:36,679 INFO L225 Difference]: With dead ends: 417 [2020-10-28 09:25:36,679 INFO L226 Difference]: Without dead ends: 356 [2020-10-28 09:25:36,681 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=759, Invalid=1221, Unknown=0, NotChecked=0, Total=1980 [2020-10-28 09:25:36,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2020-10-28 09:25:36,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 112. [2020-10-28 09:25:36,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-10-28 09:25:36,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 114 transitions. [2020-10-28 09:25:36,702 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 114 transitions. Word has length 105 [2020-10-28 09:25:36,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:25:36,702 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 114 transitions. [2020-10-28 09:25:36,702 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-28 09:25:36,702 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 114 transitions. [2020-10-28 09:25:36,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-10-28 09:25:36,703 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:25:36,703 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:25:36,704 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-28 09:25:36,704 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:25:36,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:25:36,704 INFO L82 PathProgramCache]: Analyzing trace with hash 829731528, now seen corresponding path program 17 times [2020-10-28 09:25:36,704 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:25:36,705 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1994629489] [2020-10-28 09:25:36,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:25:36,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:25:36,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:25:36,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:25:39,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:26:08,518 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:26:08,518 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 121 [2020-10-28 09:26:08,519 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:26:08,519 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 31776 [2020-10-28 09:26:08,519 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:26:08,519 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:26:08,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-28 09:26:08,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 55 [2020-10-28 09:26:08,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-28 09:26:08,520 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:26:08,971 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:26:08,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:26:08,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:26:08,978 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:26:08,978 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:26:08,978 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:26:08,978 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:26:08,978 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:26:08,978 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:26:08,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:26:08,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:26:08,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:26:08,979 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:26:08,981 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-28 09:26:08,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:26:08,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:26:08,984 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:26:08,984 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:26:08,984 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:26:08,984 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:26:08,985 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:26:08,985 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:26:08,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:26:08,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:26:08,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:26:08,985 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:26:08,997 INFO L134 CoverageAnalysis]: Checked inductivity of 886 backedges. 2 proven. 441 refuted. 0 times theorem prover too weak. 443 trivial. 0 not checked. [2020-10-28 09:26:08,997 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1994629489] [2020-10-28 09:26:08,997 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:26:08,997 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-28 09:26:08,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756170477] [2020-10-28 09:26:08,998 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-28 09:26:08,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:26:08,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-28 09:26:08,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-28 09:26:08,999 INFO L87 Difference]: Start difference. First operand 112 states and 114 transitions. Second operand 25 states. [2020-10-28 09:26:11,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:26:11,816 INFO L93 Difference]: Finished difference Result 435 states and 440 transitions. [2020-10-28 09:26:11,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-28 09:26:11,817 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 109 [2020-10-28 09:26:11,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:26:11,819 INFO L225 Difference]: With dead ends: 435 [2020-10-28 09:26:11,819 INFO L226 Difference]: Without dead ends: 372 [2020-10-28 09:26:11,820 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=828, Invalid=1334, Unknown=0, NotChecked=0, Total=2162 [2020-10-28 09:26:11,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2020-10-28 09:26:11,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 116. [2020-10-28 09:26:11,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-10-28 09:26:11,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 118 transitions. [2020-10-28 09:26:11,846 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 118 transitions. Word has length 109 [2020-10-28 09:26:11,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:26:11,847 INFO L481 AbstractCegarLoop]: Abstraction has 116 states and 118 transitions. [2020-10-28 09:26:11,847 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-28 09:26:11,847 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 118 transitions. [2020-10-28 09:26:11,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-10-28 09:26:11,848 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:26:11,848 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:26:11,849 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-28 09:26:11,849 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:26:11,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:26:11,850 INFO L82 PathProgramCache]: Analyzing trace with hash -303525436, now seen corresponding path program 18 times [2020-10-28 09:26:11,850 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:26:11,850 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1119629807] [2020-10-28 09:26:11,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:26:11,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:26:11,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:26:11,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking...