/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=SHALLOWEST --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-crafted/bor2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-26 19:02:11,175 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-26 19:02:11,178 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-26 19:02:11,213 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-26 19:02:11,213 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-26 19:02:11,215 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-26 19:02:11,216 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-26 19:02:11,219 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-26 19:02:11,221 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-26 19:02:11,222 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-26 19:02:11,223 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-26 19:02:11,225 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-26 19:02:11,225 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-26 19:02:11,226 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-26 19:02:11,227 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-26 19:02:11,229 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-26 19:02:11,230 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-26 19:02:11,231 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-26 19:02:11,233 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-26 19:02:11,244 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-26 19:02:11,246 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-26 19:02:11,249 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-26 19:02:11,250 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-26 19:02:11,251 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-26 19:02:11,257 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-26 19:02:11,258 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-26 19:02:11,258 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-26 19:02:11,259 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-26 19:02:11,260 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-26 19:02:11,261 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-26 19:02:11,261 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-26 19:02:11,262 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-26 19:02:11,263 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-26 19:02:11,264 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-26 19:02:11,265 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-26 19:02:11,265 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-26 19:02:11,266 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-26 19:02:11,266 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-26 19:02:11,266 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-26 19:02:11,267 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-26 19:02:11,268 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-26 19:02:11,269 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 [2020-10-26 19:02:11,296 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-26 19:02:11,296 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-26 19:02:11,297 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-26 19:02:11,298 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-26 19:02:11,298 INFO L138 SettingsManager]: * Use SBE=true [2020-10-26 19:02:11,298 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-26 19:02:11,298 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-26 19:02:11,299 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-26 19:02:11,299 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-26 19:02:11,299 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-26 19:02:11,299 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-26 19:02:11,299 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-26 19:02:11,299 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-26 19:02:11,300 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-26 19:02:11,300 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-26 19:02:11,300 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-26 19:02:11,300 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-26 19:02:11,300 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-26 19:02:11,301 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-26 19:02:11,301 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-26 19:02:11,301 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-26 19:02:11,301 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 19:02:11,301 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-26 19:02:11,302 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-26 19:02:11,302 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-26 19:02:11,302 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-26 19:02:11,302 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-26 19:02:11,302 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-26 19:02:11,303 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-26 19:02:11,303 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-26 19:02:11,692 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-26 19:02:11,719 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-26 19:02:11,722 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-26 19:02:11,723 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-26 19:02:11,724 INFO L275 PluginConnector]: CDTParser initialized [2020-10-26 19:02:11,725 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-crafted/bor2.i [2020-10-26 19:02:11,795 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6b3651448/bb78cd4683fa4308aa3884e030fae767/FLAGd752ddc4b [2020-10-26 19:02:12,491 INFO L306 CDTParser]: Found 1 translation units. [2020-10-26 19:02:12,492 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-crafted/bor2.i [2020-10-26 19:02:12,500 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6b3651448/bb78cd4683fa4308aa3884e030fae767/FLAGd752ddc4b [2020-10-26 19:02:12,829 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6b3651448/bb78cd4683fa4308aa3884e030fae767 [2020-10-26 19:02:12,833 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-26 19:02:12,842 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-26 19:02:12,846 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-26 19:02:12,846 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-26 19:02:12,850 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-26 19:02:12,851 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 07:02:12" (1/1) ... [2020-10-26 19:02:12,855 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@653fef69 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:02:12, skipping insertion in model container [2020-10-26 19:02:12,855 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 07:02:12" (1/1) ... [2020-10-26 19:02:12,863 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-26 19:02:12,882 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-26 19:02:13,048 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 19:02:13,056 INFO L203 MainTranslator]: Completed pre-run [2020-10-26 19:02:13,082 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 19:02:13,097 INFO L208 MainTranslator]: Completed translation [2020-10-26 19:02:13,098 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:02:13 WrapperNode [2020-10-26 19:02:13,098 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-26 19:02:13,099 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-26 19:02:13,099 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-26 19:02:13,100 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-26 19:02:13,112 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:02:13" (1/1) ... [2020-10-26 19:02:13,112 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:02:13" (1/1) ... [2020-10-26 19:02:13,121 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:02:13" (1/1) ... [2020-10-26 19:02:13,122 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:02:13" (1/1) ... [2020-10-26 19:02:13,132 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:02:13" (1/1) ... [2020-10-26 19:02:13,137 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:02:13" (1/1) ... [2020-10-26 19:02:13,139 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:02:13" (1/1) ... [2020-10-26 19:02:13,142 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-26 19:02:13,143 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-26 19:02:13,143 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-26 19:02:13,143 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-26 19:02:13,144 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:02:13" (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 [2020-10-26 19:02:13,229 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-26 19:02:13,229 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-26 19:02:13,230 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-26 19:02:13,230 INFO L138 BoogieDeclarations]: Found implementation of procedure bor [2020-10-26 19:02:13,230 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-26 19:02:13,231 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-26 19:02:13,231 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-26 19:02:13,231 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-26 19:02:13,232 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-26 19:02:13,232 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-26 19:02:13,234 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-26 19:02:13,234 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-26 19:02:13,235 INFO L130 BoogieDeclarations]: Found specification of procedure bor [2020-10-26 19:02:13,235 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-26 19:02:13,235 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-26 19:02:13,236 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-26 19:02:13,236 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-26 19:02:13,236 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-26 19:02:13,236 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-26 19:02:13,236 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-26 19:02:13,814 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-26 19:02:13,814 INFO L298 CfgBuilder]: Removed 3 assume(true) statements. [2020-10-26 19:02:13,817 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 07:02:13 BoogieIcfgContainer [2020-10-26 19:02:13,817 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-26 19:02:13,823 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-26 19:02:13,823 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-26 19:02:13,826 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-26 19:02:13,827 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 07:02:12" (1/3) ... [2020-10-26 19:02:13,827 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43691fda and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 07:02:13, skipping insertion in model container [2020-10-26 19:02:13,828 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:02:13" (2/3) ... [2020-10-26 19:02:13,829 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43691fda and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 07:02:13, skipping insertion in model container [2020-10-26 19:02:13,829 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 07:02:13" (3/3) ... [2020-10-26 19:02:13,831 INFO L111 eAbstractionObserver]: Analyzing ICFG bor2.i [2020-10-26 19:02:13,864 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-26 19:02:13,869 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-26 19:02:13,883 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-26 19:02:13,924 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-26 19:02:13,925 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-26 19:02:13,925 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-26 19:02:13,925 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-26 19:02:13,925 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-26 19:02:13,925 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-26 19:02:13,925 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-26 19:02:13,925 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-26 19:02:13,945 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states. [2020-10-26 19:02:13,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-26 19:02:13,954 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:02:13,956 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, 1, 1, 1, 1, 1] [2020-10-26 19:02:13,956 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:02:13,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:02:13,966 INFO L82 PathProgramCache]: Analyzing trace with hash 1900796497, now seen corresponding path program 1 times [2020-10-26 19:02:13,975 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:02:13,976 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2006177503] [2020-10-26 19:02:13,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:02:14,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:02:14,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:14,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:14,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:14,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:14,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:14,710 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:02:14,711 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-26 19:02:14,711 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:02:14,711 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 612 [2020-10-26 19:02:14,714 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:02:14,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:02:14,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:02:14,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:02:14,715 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-26 19:02:14,799 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:02:14,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:02:14,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:14,827 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:02:14,828 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:02:14,828 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:02:14,828 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-26 19:02:14,828 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:02:14,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:02:14,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:02:14,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:02:14,830 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:02:14,838 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:02:14,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:02:14,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:14,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:14,865 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:02:14,866 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-26 19:02:14,866 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:02:14,866 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-26 19:02:14,866 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:02:14,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:02:14,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-10-26 19:02:14,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:02:14,868 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:02:14,870 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-10-26 19:02:14,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:02:14,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:14,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:14,900 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:02:14,900 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-26 19:02:14,901 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:02:14,901 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-10-26 19:02:14,901 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:02:14,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:02:14,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-10-26 19:02:14,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:02:14,902 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:02:14,907 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-26 19:02:14,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:02:14,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:14,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:14,927 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:02:14,927 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-26 19:02:14,927 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:02:14,927 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-26 19:02:14,928 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:02:14,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:02:14,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-10-26 19:02:14,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:02:14,929 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:02:14,943 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-26 19:02:14,943 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2006177503] [2020-10-26 19:02:14,946 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 19:02:14,946 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-26 19:02:14,948 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838870078] [2020-10-26 19:02:14,953 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-26 19:02:14,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:02:14,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-26 19:02:14,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-26 19:02:14,981 INFO L87 Difference]: Start difference. First operand 35 states. Second operand 3 states. [2020-10-26 19:02:15,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:02:15,100 INFO L93 Difference]: Finished difference Result 60 states and 80 transitions. [2020-10-26 19:02:15,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-26 19:02:15,102 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 34 [2020-10-26 19:02:15,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:02:15,111 INFO L225 Difference]: With dead ends: 60 [2020-10-26 19:02:15,111 INFO L226 Difference]: Without dead ends: 28 [2020-10-26 19:02:15,115 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-26 19:02:15,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-26 19:02:15,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-10-26 19:02:15,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-26 19:02:15,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2020-10-26 19:02:15,164 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 34 [2020-10-26 19:02:15,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:02:15,164 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2020-10-26 19:02:15,164 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-26 19:02:15,164 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2020-10-26 19:02:15,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-26 19:02:15,167 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:02:15,167 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, 1, 1, 1, 1, 1] [2020-10-26 19:02:15,167 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-26 19:02:15,167 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:02:15,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:02:15,168 INFO L82 PathProgramCache]: Analyzing trace with hash -1640105647, now seen corresponding path program 1 times [2020-10-26 19:02:15,168 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:02:15,169 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2031880286] [2020-10-26 19:02:15,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:02:15,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:02:15,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:15,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:15,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:15,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:15,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:16,371 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:02:16,372 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-26 19:02:16,372 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:02:16,372 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1186 [2020-10-26 19:02:16,372 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:02:16,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:02:16,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:02:16,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 19:02:16,373 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:02:16,413 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:02:16,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:02:16,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:16,424 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:02:16,424 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:02:16,424 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:02:16,425 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 19:02:16,425 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:02:16,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:02:16,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:02:16,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:02:16,425 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:02:16,428 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:02:16,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:02:16,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:16,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:16,457 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:02:16,457 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-26 19:02:16,457 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:02:16,458 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-26 19:02:16,458 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:02:16,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:02:16,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:02:16,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 19:02:16,459 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:02:16,471 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-10-26 19:02:16,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:02:16,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:16,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:16,487 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:02:16,487 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-26 19:02:16,487 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:02:16,487 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-26 19:02:16,488 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:02:16,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:02:16,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:02:16,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 19:02:16,488 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:02:16,493 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-26 19:02:16,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:02:16,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:16,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:16,510 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:02:16,510 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-26 19:02:16,510 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:02:16,511 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-26 19:02:16,511 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:02:16,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:02:16,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:02:16,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 19:02:16,512 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:02:16,516 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-26 19:02:16,516 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2031880286] [2020-10-26 19:02:16,517 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 19:02:16,517 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-26 19:02:16,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37046463] [2020-10-26 19:02:16,520 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-26 19:02:16,520 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:02:16,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-26 19:02:16,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-26 19:02:16,522 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 5 states. [2020-10-26 19:02:16,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:02:16,699 INFO L93 Difference]: Finished difference Result 52 states and 64 transitions. [2020-10-26 19:02:16,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 19:02:16,699 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 34 [2020-10-26 19:02:16,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:02:16,701 INFO L225 Difference]: With dead ends: 52 [2020-10-26 19:02:16,701 INFO L226 Difference]: Without dead ends: 32 [2020-10-26 19:02:16,703 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-26 19:02:16,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-10-26 19:02:16,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2020-10-26 19:02:16,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-26 19:02:16,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2020-10-26 19:02:16,716 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 34 [2020-10-26 19:02:16,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:02:16,716 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2020-10-26 19:02:16,716 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-26 19:02:16,716 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2020-10-26 19:02:16,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-26 19:02:16,718 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:02:16,718 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:02:16,718 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-26 19:02:16,718 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:02:16,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:02:16,719 INFO L82 PathProgramCache]: Analyzing trace with hash -1537402351, now seen corresponding path program 1 times [2020-10-26 19:02:16,719 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:02:16,719 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [373596994] [2020-10-26 19:02:16,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:02:16,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:02:16,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:16,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:16,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:16,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:16,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:20,508 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:02:20,508 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-26 19:02:20,508 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:02:20,508 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3775 [2020-10-26 19:02:20,509 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:02:20,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-26 19:02:20,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:02:20,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-26 19:02:20,509 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:02:20,571 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:02:20,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:02:20,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:20,581 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:02:20,581 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:02:20,581 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:02:20,582 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 19:02:20,582 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:02:20,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:02:20,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:02:20,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:02:20,583 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:02:20,585 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-26 19:02:20,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:02:20,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:20,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:20,602 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:02:20,602 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-26 19:02:20,603 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:02:20,603 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-26 19:02:20,603 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:02:20,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-26 19:02:20,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:02:20,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-26 19:02:20,604 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:02:20,622 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-10-26 19:02:20,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:02:20,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:20,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:20,653 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:02:20,653 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-26 19:02:20,653 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:02:20,653 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-10-26 19:02:20,654 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:02:20,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-26 19:02:20,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:02:20,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-26 19:02:20,655 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:02:20,658 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-26 19:02:20,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:02:20,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:20,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:20,675 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:02:20,675 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-26 19:02:20,675 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:02:20,675 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-26 19:02:20,676 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:02:20,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-26 19:02:20,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:02:20,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-26 19:02:20,676 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:02:20,684 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-10-26 19:02:20,684 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [373596994] [2020-10-26 19:02:20,684 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:02:20,684 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 19:02:20,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109625002] [2020-10-26 19:02:20,686 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 19:02:20,686 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:02:20,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 19:02:20,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-10-26 19:02:20,689 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand 7 states. [2020-10-26 19:02:20,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:02:20,885 INFO L93 Difference]: Finished difference Result 57 states and 69 transitions. [2020-10-26 19:02:20,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-26 19:02:20,885 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 42 [2020-10-26 19:02:20,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:02:20,886 INFO L225 Difference]: With dead ends: 57 [2020-10-26 19:02:20,887 INFO L226 Difference]: Without dead ends: 36 [2020-10-26 19:02:20,888 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-10-26 19:02:20,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-26 19:02:20,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 34. [2020-10-26 19:02:20,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-26 19:02:20,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2020-10-26 19:02:20,902 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 42 [2020-10-26 19:02:20,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:02:20,903 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2020-10-26 19:02:20,903 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 19:02:20,903 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2020-10-26 19:02:20,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-26 19:02:20,906 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:02:20,906 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:02:20,907 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-26 19:02:20,907 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:02:20,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:02:20,907 INFO L82 PathProgramCache]: Analyzing trace with hash -1486624559, now seen corresponding path program 2 times [2020-10-26 19:02:20,907 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:02:20,908 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [273351221] [2020-10-26 19:02:20,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:02:20,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:02:20,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:20,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:20,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:20,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:21,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:25,936 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:02:25,936 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-26 19:02:25,936 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:02:25,937 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-26 19:02:25,937 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:02:25,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 19:02:25,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:02:25,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:02:25,938 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:02:26,026 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:02:26,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:02:26,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:26,050 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:02:26,051 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:02:26,051 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:02:26,051 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-26 19:02:26,052 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:02:26,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:02:26,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:02:26,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:02:26,054 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-26 19:02:26,060 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-10-26 19:02:26,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:02:26,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:26,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:26,104 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:02:26,107 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-10-26 19:02:26,107 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:02:26,108 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 39 [2020-10-26 19:02:26,108 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:02:26,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 19:02:26,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:02:26,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:02:26,109 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:02:26,147 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-10-26 19:02:26,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:02:26,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:26,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:26,177 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:02:26,177 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-10-26 19:02:26,177 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:02:26,178 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-26 19:02:26,178 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:02:26,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 19:02:26,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:02:26,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:02:26,179 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:02:26,183 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-10-26 19:02:26,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:02:26,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:26,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:26,211 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:02:26,211 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-10-26 19:02:26,211 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:02:26,211 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-26 19:02:26,212 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:02:26,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 19:02:26,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:02:26,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:02:26,212 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:02:26,220 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 12 proven. 28 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-10-26 19:02:26,221 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [273351221] [2020-10-26 19:02:26,221 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:02:26,221 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-26 19:02:26,222 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242654397] [2020-10-26 19:02:26,222 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-26 19:02:26,222 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:02:26,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-26 19:02:26,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-26 19:02:26,225 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand 9 states. [2020-10-26 19:02:26,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:02:26,441 INFO L93 Difference]: Finished difference Result 63 states and 75 transitions. [2020-10-26 19:02:26,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-26 19:02:26,442 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 50 [2020-10-26 19:02:26,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:02:26,443 INFO L225 Difference]: With dead ends: 63 [2020-10-26 19:02:26,443 INFO L226 Difference]: Without dead ends: 40 [2020-10-26 19:02:26,444 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2020-10-26 19:02:26,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-26 19:02:26,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 38. [2020-10-26 19:02:26,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-26 19:02:26,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2020-10-26 19:02:26,451 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 50 [2020-10-26 19:02:26,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:02:26,452 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2020-10-26 19:02:26,452 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-26 19:02:26,452 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2020-10-26 19:02:26,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-26 19:02:26,453 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:02:26,453 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:02:26,453 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-26 19:02:26,453 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:02:26,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:02:26,454 INFO L82 PathProgramCache]: Analyzing trace with hash 1972987281, now seen corresponding path program 3 times [2020-10-26 19:02:26,454 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:02:26,454 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [602506356] [2020-10-26 19:02:26,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:02:26,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:02:26,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:26,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:26,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:26,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:27,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:31,474 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:02:31,474 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-26 19:02:31,475 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:02:31,475 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-26 19:02:31,475 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:02:31,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 19:02:31,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:02:31,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-26 19:02:31,476 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:02:31,539 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:02:31,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:02:31,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:31,551 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:02:31,552 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:02:31,552 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:02:31,552 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-26 19:02:31,552 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:02:31,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:02:31,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:02:31,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:02:31,553 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:02:31,556 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-10-26 19:02:31,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:02:31,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:31,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:31,582 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:02:31,584 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-26 19:02:31,584 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:02:31,584 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-26 19:02:31,585 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:02:31,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 19:02:31,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:02:31,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-26 19:02:31,585 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:02:31,628 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-10-26 19:02:31,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:02:31,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:31,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:31,659 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:02:31,659 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-26 19:02:31,659 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:02:31,659 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-10-26 19:02:31,660 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:02:31,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 19:02:31,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:02:31,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-26 19:02:31,660 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:02:31,666 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-10-26 19:02:31,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:02:31,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:31,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:31,700 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:02:31,701 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-26 19:02:31,701 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:02:31,701 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 31 [2020-10-26 19:02:31,701 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:02:31,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 19:02:31,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:02:31,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-26 19:02:31,702 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:02:31,717 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 27 proven. 63 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2020-10-26 19:02:31,718 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [602506356] [2020-10-26 19:02:31,719 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:02:31,719 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-26 19:02:31,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589097522] [2020-10-26 19:02:31,719 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-26 19:02:31,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:02:31,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-26 19:02:31,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2020-10-26 19:02:31,721 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand 11 states. [2020-10-26 19:02:32,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:02:32,002 INFO L93 Difference]: Finished difference Result 69 states and 81 transitions. [2020-10-26 19:02:32,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 19:02:32,003 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 58 [2020-10-26 19:02:32,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:02:32,004 INFO L225 Difference]: With dead ends: 69 [2020-10-26 19:02:32,005 INFO L226 Difference]: Without dead ends: 44 [2020-10-26 19:02:32,006 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-10-26 19:02:32,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-26 19:02:32,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 42. [2020-10-26 19:02:32,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-26 19:02:32,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2020-10-26 19:02:32,016 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 58 [2020-10-26 19:02:32,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:02:32,019 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2020-10-26 19:02:32,019 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-26 19:02:32,019 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2020-10-26 19:02:32,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-26 19:02:32,020 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:02:32,020 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:02:32,020 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-26 19:02:32,021 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:02:32,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:02:32,023 INFO L82 PathProgramCache]: Analyzing trace with hash 1550094417, now seen corresponding path program 4 times [2020-10-26 19:02:32,023 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:02:32,023 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1418237606] [2020-10-26 19:02:32,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:02:32,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:02:32,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:32,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:32,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:32,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:34,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:37,041 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:02:37,041 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-26 19:02:37,042 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:02:37,042 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-26 19:02:37,042 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:02:37,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 19:02:37,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:02:37,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-26 19:02:37,042 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:02:37,105 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:02:37,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:02:37,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:37,111 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:02:37,111 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:02:37,111 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:02:37,111 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:02:37,112 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:02:37,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:02:37,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:02:37,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:02:37,112 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:02:37,115 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-26 19:02:37,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:02:37,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:37,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:37,141 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:02:37,141 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-26 19:02:37,141 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:02:37,141 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-26 19:02:37,141 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:02:37,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 19:02:37,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:02:37,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-26 19:02:37,142 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:02:37,193 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-10-26 19:02:37,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:02:37,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:37,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:37,213 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:02:37,213 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-26 19:02:37,213 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:02:37,213 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-26 19:02:37,214 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:02:37,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 19:02:37,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:02:37,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-26 19:02:37,214 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:02:37,218 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-10-26 19:02:37,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:02:37,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:37,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:37,242 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:02:37,243 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-26 19:02:37,243 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:02:37,243 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-26 19:02:37,243 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:02:37,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 19:02:37,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:02:37,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-26 19:02:37,244 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:02:37,253 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 48 proven. 112 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2020-10-26 19:02:37,254 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1418237606] [2020-10-26 19:02:37,254 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:02:37,254 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-26 19:02:37,254 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421669263] [2020-10-26 19:02:37,255 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-26 19:02:37,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:02:37,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-26 19:02:37,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2020-10-26 19:02:37,256 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand 13 states. [2020-10-26 19:02:37,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:02:37,510 INFO L93 Difference]: Finished difference Result 75 states and 87 transitions. [2020-10-26 19:02:37,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-26 19:02:37,511 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 66 [2020-10-26 19:02:37,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:02:37,512 INFO L225 Difference]: With dead ends: 75 [2020-10-26 19:02:37,512 INFO L226 Difference]: Without dead ends: 48 [2020-10-26 19:02:37,513 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2020-10-26 19:02:37,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-26 19:02:37,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 46. [2020-10-26 19:02:37,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-26 19:02:37,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2020-10-26 19:02:37,520 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 66 [2020-10-26 19:02:37,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:02:37,521 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2020-10-26 19:02:37,521 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-26 19:02:37,521 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2020-10-26 19:02:37,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-26 19:02:37,522 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:02:37,522 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:02:37,522 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-26 19:02:37,523 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:02:37,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:02:37,523 INFO L82 PathProgramCache]: Analyzing trace with hash 407660817, now seen corresponding path program 5 times [2020-10-26 19:02:37,523 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:02:37,524 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [568339756] [2020-10-26 19:02:37,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:02:37,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:02:37,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:37,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:37,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:37,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:41,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:42,539 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:02:42,540 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-26 19:02:42,540 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:02:42,540 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-26 19:02:42,540 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:02:42,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-26 19:02:42,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:02:42,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-26 19:02:42,541 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:02:42,614 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:02:42,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:02:42,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:42,620 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:02:42,620 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:02:42,621 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:02:42,621 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:02:42,621 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:02:42,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:02:42,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:02:42,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:02:42,621 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:02:42,623 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-10-26 19:02:42,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:02:42,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:42,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:42,651 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:02:42,651 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-26 19:02:42,652 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:02:42,652 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-10-26 19:02:42,652 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:02:42,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-26 19:02:42,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:02:42,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-26 19:02:42,652 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:02:42,723 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-10-26 19:02:42,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:02:42,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:42,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:42,754 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:02:42,755 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-26 19:02:42,755 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:02:42,755 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-10-26 19:02:42,755 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:02:42,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-26 19:02:42,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:02:42,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-26 19:02:42,756 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:02:42,765 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-10-26 19:02:42,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:02:42,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:42,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:42,807 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:02:42,807 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-26 19:02:42,807 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:02:42,807 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 34 [2020-10-26 19:02:42,807 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:02:42,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-26 19:02:42,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:02:42,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-26 19:02:42,808 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:02:42,826 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 75 proven. 175 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-10-26 19:02:42,827 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [568339756] [2020-10-26 19:02:42,827 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:02:42,827 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-26 19:02:42,827 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661081220] [2020-10-26 19:02:42,828 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-26 19:02:42,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:02:42,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-26 19:02:42,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2020-10-26 19:02:42,830 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand 15 states. [2020-10-26 19:02:43,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:02:43,225 INFO L93 Difference]: Finished difference Result 81 states and 93 transitions. [2020-10-26 19:02:43,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-26 19:02:43,225 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 74 [2020-10-26 19:02:43,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:02:43,227 INFO L225 Difference]: With dead ends: 81 [2020-10-26 19:02:43,227 INFO L226 Difference]: Without dead ends: 52 [2020-10-26 19:02:43,228 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=111, Invalid=309, Unknown=0, NotChecked=0, Total=420 [2020-10-26 19:02:43,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-26 19:02:43,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 50. [2020-10-26 19:02:43,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-26 19:02:43,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2020-10-26 19:02:43,236 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 74 [2020-10-26 19:02:43,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:02:43,237 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2020-10-26 19:02:43,237 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-26 19:02:43,237 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2020-10-26 19:02:43,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-26 19:02:43,238 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:02:43,238 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:02:43,238 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-26 19:02:43,239 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:02:43,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:02:43,239 INFO L82 PathProgramCache]: Analyzing trace with hash -990384175, now seen corresponding path program 6 times [2020-10-26 19:02:43,239 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:02:43,240 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1942108083] [2020-10-26 19:02:43,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:02:43,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:02:43,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:43,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:43,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:43,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:47,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:48,255 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:02:48,260 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 96 [2020-10-26 19:02:48,260 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:02:48,260 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-26 19:02:48,260 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:02:48,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 19:02:48,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:02:48,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-26 19:02:48,261 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:02:48,365 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:02:48,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:02:48,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:48,372 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:02:48,372 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:02:48,372 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:02:48,372 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:02:48,372 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:02:48,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:02:48,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:02:48,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:02:48,373 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:02:48,375 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-26 19:02:48,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:02:48,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:48,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:48,409 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:02:48,409 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-26 19:02:48,409 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:02:48,409 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 30 [2020-10-26 19:02:48,410 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:02:48,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 19:02:48,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:02:48,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-26 19:02:48,410 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:02:48,526 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-10-26 19:02:48,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:02:48,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:48,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:48,565 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:02:48,565 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-26 19:02:48,565 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:02:48,565 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 34 [2020-10-26 19:02:48,566 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:02:48,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 19:02:48,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:02:48,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-26 19:02:48,566 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:02:48,573 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2020-10-26 19:02:48,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:02:48,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:48,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:48,608 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:02:48,608 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-26 19:02:48,608 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:02:48,608 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 30 [2020-10-26 19:02:48,608 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:02:48,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 19:02:48,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:02:48,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-26 19:02:48,609 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:02:48,629 INFO L134 CoverageAnalysis]: Checked inductivity of 411 backedges. 108 proven. 252 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2020-10-26 19:02:48,629 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1942108083] [2020-10-26 19:02:48,629 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:02:48,629 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-26 19:02:48,630 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881709003] [2020-10-26 19:02:48,632 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-26 19:02:48,632 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:02:48,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-26 19:02:48,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2020-10-26 19:02:48,633 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand 17 states. [2020-10-26 19:02:49,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:02:49,103 INFO L93 Difference]: Finished difference Result 87 states and 99 transitions. [2020-10-26 19:02:49,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-26 19:02:49,104 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 82 [2020-10-26 19:02:49,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:02:49,105 INFO L225 Difference]: With dead ends: 87 [2020-10-26 19:02:49,105 INFO L226 Difference]: Without dead ends: 56 [2020-10-26 19:02:49,106 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=143, Invalid=409, Unknown=0, NotChecked=0, Total=552 [2020-10-26 19:02:49,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-26 19:02:49,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 54. [2020-10-26 19:02:49,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-26 19:02:49,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 58 transitions. [2020-10-26 19:02:49,121 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 58 transitions. Word has length 82 [2020-10-26 19:02:49,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:02:49,121 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 58 transitions. [2020-10-26 19:02:49,121 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-26 19:02:49,121 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 58 transitions. [2020-10-26 19:02:49,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-10-26 19:02:49,125 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:02:49,125 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 7, 7, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:02:49,126 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-26 19:02:49,126 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:02:49,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:02:49,131 INFO L82 PathProgramCache]: Analyzing trace with hash -852613999, now seen corresponding path program 7 times [2020-10-26 19:02:49,131 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:02:49,132 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1562890802] [2020-10-26 19:02:49,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:02:49,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:02:49,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:49,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:49,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:49,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:54,161 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:02:54,162 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 104 [2020-10-26 19:02:54,162 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:02:54,162 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-26 19:02:54,162 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:02:54,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-26 19:02:54,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:02:54,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-26 19:02:54,163 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:02:54,258 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:02:54,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:02:54,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:54,265 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:02:54,265 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:02:54,266 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:02:54,266 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:02:54,266 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:02:54,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:02:54,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:02:54,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:02:54,267 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:02:54,269 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-10-26 19:02:54,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:02:54,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:54,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:54,308 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:02:54,308 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-26 19:02:54,308 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:02:54,308 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 35 [2020-10-26 19:02:54,309 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:02:54,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-26 19:02:54,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:02:54,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-26 19:02:54,309 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:02:54,463 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-10-26 19:02:54,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:02:54,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:54,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:54,506 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:02:54,506 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-26 19:02:54,506 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:02:54,506 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 38 [2020-10-26 19:02:54,506 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:02:54,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-26 19:02:54,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:02:54,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-26 19:02:54,507 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:02:54,518 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-10-26 19:02:54,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:02:54,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:54,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:54,559 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:02:54,559 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-26 19:02:54,560 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:02:54,560 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 34 [2020-10-26 19:02:54,560 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:02:54,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-26 19:02:54,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:02:54,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-26 19:02:54,560 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:02:54,575 INFO L134 CoverageAnalysis]: Checked inductivity of 547 backedges. 147 proven. 343 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-10-26 19:02:54,575 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1562890802] [2020-10-26 19:02:54,576 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:02:54,576 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-26 19:02:54,577 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879604864] [2020-10-26 19:02:54,578 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-26 19:02:54,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:02:54,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-26 19:02:54,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=251, Unknown=0, NotChecked=0, Total=342 [2020-10-26 19:02:54,584 INFO L87 Difference]: Start difference. First operand 54 states and 58 transitions. Second operand 19 states. [2020-10-26 19:02:55,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:02:55,079 INFO L93 Difference]: Finished difference Result 93 states and 105 transitions. [2020-10-26 19:02:55,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-26 19:02:55,080 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 90 [2020-10-26 19:02:55,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:02:55,081 INFO L225 Difference]: With dead ends: 93 [2020-10-26 19:02:55,081 INFO L226 Difference]: Without dead ends: 60 [2020-10-26 19:02:55,082 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=179, Invalid=523, Unknown=0, NotChecked=0, Total=702 [2020-10-26 19:02:55,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-26 19:02:55,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 58. [2020-10-26 19:02:55,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-26 19:02:55,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 62 transitions. [2020-10-26 19:02:55,094 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 62 transitions. Word has length 90 [2020-10-26 19:02:55,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:02:55,095 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 62 transitions. [2020-10-26 19:02:55,095 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-26 19:02:55,095 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 62 transitions. [2020-10-26 19:02:55,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-10-26 19:02:55,101 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:02:55,101 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 8, 8, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:02:55,102 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-26 19:02:55,102 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:02:55,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:02:55,102 INFO L82 PathProgramCache]: Analyzing trace with hash -623507631, now seen corresponding path program 8 times [2020-10-26 19:02:55,103 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:02:55,103 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [475652893] [2020-10-26 19:02:55,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:02:55,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:02:55,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:55,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:55,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:55,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:00,125 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:03:00,125 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-10-26 19:03:00,125 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:03:00,126 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-26 19:03:00,126 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:03:00,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-26 19:03:00,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:03:00,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-26 19:03:00,126 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:03:00,245 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:03:00,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:03:00,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:00,250 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:03:00,251 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:03:00,251 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:03:00,251 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:03:00,251 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:03:00,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:03:00,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:03:00,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:03:00,251 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:03:00,253 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-26 19:03:00,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:03:00,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:00,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:00,289 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:03:00,289 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-26 19:03:00,289 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:03:00,289 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 33 [2020-10-26 19:03:00,289 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:03:00,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-26 19:03:00,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:03:00,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-26 19:03:00,290 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:03:00,456 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-10-26 19:03:00,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:03:00,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:00,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:00,491 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:03:00,492 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-26 19:03:00,492 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:03:00,492 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 32 [2020-10-26 19:03:00,492 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:03:00,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-26 19:03:00,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:03:00,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-26 19:03:00,493 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:03:00,498 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-10-26 19:03:00,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:03:00,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:00,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:00,538 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:03:00,538 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-26 19:03:00,538 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:03:00,538 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 35 [2020-10-26 19:03:00,539 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:03:00,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-26 19:03:00,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:03:00,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-26 19:03:00,539 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:03:00,556 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 192 proven. 448 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2020-10-26 19:03:00,556 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [475652893] [2020-10-26 19:03:00,556 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:03:00,556 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-26 19:03:00,557 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833964582] [2020-10-26 19:03:00,557 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-26 19:03:00,557 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:03:00,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-26 19:03:00,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=309, Unknown=0, NotChecked=0, Total=420 [2020-10-26 19:03:00,558 INFO L87 Difference]: Start difference. First operand 58 states and 62 transitions. Second operand 21 states. [2020-10-26 19:03:01,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:03:01,166 INFO L93 Difference]: Finished difference Result 99 states and 111 transitions. [2020-10-26 19:03:01,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-26 19:03:01,166 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 98 [2020-10-26 19:03:01,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:03:01,167 INFO L225 Difference]: With dead ends: 99 [2020-10-26 19:03:01,168 INFO L226 Difference]: Without dead ends: 64 [2020-10-26 19:03:01,169 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=219, Invalid=651, Unknown=0, NotChecked=0, Total=870 [2020-10-26 19:03:01,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-26 19:03:01,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 62. [2020-10-26 19:03:01,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-26 19:03:01,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 66 transitions. [2020-10-26 19:03:01,177 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 66 transitions. Word has length 98 [2020-10-26 19:03:01,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:03:01,177 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 66 transitions. [2020-10-26 19:03:01,177 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-26 19:03:01,177 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 66 transitions. [2020-10-26 19:03:01,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-10-26 19:03:01,178 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:03:01,179 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 9, 9, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:03:01,179 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-26 19:03:01,179 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:03:01,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:03:01,179 INFO L82 PathProgramCache]: Analyzing trace with hash -956917743, now seen corresponding path program 9 times [2020-10-26 19:03:01,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:03:01,180 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1506577975] [2020-10-26 19:03:01,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:03:01,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:03:01,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:01,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:01,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:01,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:06,198 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:03:06,198 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 120 [2020-10-26 19:03:06,199 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:03:06,199 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-26 19:03:06,199 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:03:06,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-26 19:03:06,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:03:06,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-26 19:03:06,199 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:03:06,331 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:03:06,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:03:06,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:06,336 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:03:06,336 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:03:06,336 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:03:06,336 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:03:06,336 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:03:06,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:03:06,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:03:06,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:03:06,337 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:03:06,339 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-10-26 19:03:06,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:03:06,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:06,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:06,379 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:03:06,380 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-26 19:03:06,380 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:03:06,380 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 38 [2020-10-26 19:03:06,380 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:03:06,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-26 19:03:06,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:03:06,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-26 19:03:06,380 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:03:06,576 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2020-10-26 19:03:06,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:03:06,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:06,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:06,633 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:03:06,633 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-26 19:03:06,633 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:03:06,633 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 51 [2020-10-26 19:03:06,633 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:03:06,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-26 19:03:06,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:03:06,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-26 19:03:06,634 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:03:06,642 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2020-10-26 19:03:06,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:03:06,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:06,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:06,696 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:03:06,696 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-26 19:03:06,696 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:03:06,697 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 49 [2020-10-26 19:03:06,697 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:03:06,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-26 19:03:06,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:03:06,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-26 19:03:06,697 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:03:06,720 INFO L134 CoverageAnalysis]: Checked inductivity of 879 backedges. 243 proven. 567 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2020-10-26 19:03:06,720 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1506577975] [2020-10-26 19:03:06,720 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:03:06,720 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-26 19:03:06,720 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243744534] [2020-10-26 19:03:06,721 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-26 19:03:06,722 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:03:06,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-26 19:03:06,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=373, Unknown=0, NotChecked=0, Total=506 [2020-10-26 19:03:06,723 INFO L87 Difference]: Start difference. First operand 62 states and 66 transitions. Second operand 23 states. [2020-10-26 19:03:07,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:03:07,385 INFO L93 Difference]: Finished difference Result 105 states and 117 transitions. [2020-10-26 19:03:07,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-26 19:03:07,386 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 106 [2020-10-26 19:03:07,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:03:07,387 INFO L225 Difference]: With dead ends: 105 [2020-10-26 19:03:07,388 INFO L226 Difference]: Without dead ends: 68 [2020-10-26 19:03:07,389 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=263, Invalid=793, Unknown=0, NotChecked=0, Total=1056 [2020-10-26 19:03:07,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-26 19:03:07,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 66. [2020-10-26 19:03:07,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-26 19:03:07,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 70 transitions. [2020-10-26 19:03:07,397 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 70 transitions. Word has length 106 [2020-10-26 19:03:07,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:03:07,398 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 70 transitions. [2020-10-26 19:03:07,398 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-26 19:03:07,398 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 70 transitions. [2020-10-26 19:03:07,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-10-26 19:03:07,399 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:03:07,399 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 10, 10, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:03:07,399 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-26 19:03:07,399 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:03:07,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:03:07,400 INFO L82 PathProgramCache]: Analyzing trace with hash -1984506159, now seen corresponding path program 10 times [2020-10-26 19:03:07,400 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:03:07,400 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1623310067] [2020-10-26 19:03:07,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:03:07,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:03:07,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:07,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:07,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:07,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:12,430 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:03:12,430 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 128 [2020-10-26 19:03:12,430 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:03:12,430 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-26 19:03:12,431 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:03:12,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-26 19:03:12,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:03:12,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-26 19:03:12,431 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:03:12,568 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:03:12,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:03:12,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:12,573 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:03:12,573 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:03:12,573 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:03:12,573 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:03:12,574 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:03:12,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:03:12,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:03:12,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:03:12,574 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:03:12,576 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-10-26 19:03:12,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:03:12,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:12,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:12,623 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:03:12,623 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-26 19:03:12,623 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:03:12,623 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 44 [2020-10-26 19:03:12,623 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:03:12,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-26 19:03:12,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:03:12,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-26 19:03:12,623 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:03:12,836 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-10-26 19:03:12,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:03:12,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:12,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:12,875 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:03:12,875 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-26 19:03:12,875 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:03:12,875 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 35 [2020-10-26 19:03:12,876 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:03:12,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-26 19:03:12,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:03:12,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-26 19:03:12,876 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:03:12,880 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-10-26 19:03:12,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:03:12,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:12,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:12,917 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:03:12,917 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-26 19:03:12,917 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:03:12,917 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 33 [2020-10-26 19:03:12,917 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:03:12,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-26 19:03:12,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:03:12,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-26 19:03:12,918 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:03:12,939 INFO L134 CoverageAnalysis]: Checked inductivity of 1075 backedges. 300 proven. 700 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2020-10-26 19:03:12,939 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1623310067] [2020-10-26 19:03:12,939 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:03:12,939 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-26 19:03:12,939 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857523286] [2020-10-26 19:03:12,940 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-26 19:03:12,940 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:03:12,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-26 19:03:12,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=443, Unknown=0, NotChecked=0, Total=600 [2020-10-26 19:03:12,941 INFO L87 Difference]: Start difference. First operand 66 states and 70 transitions. Second operand 25 states. [2020-10-26 19:03:13,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:03:13,650 INFO L93 Difference]: Finished difference Result 111 states and 123 transitions. [2020-10-26 19:03:13,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-26 19:03:13,651 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 114 [2020-10-26 19:03:13,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:03:13,652 INFO L225 Difference]: With dead ends: 111 [2020-10-26 19:03:13,652 INFO L226 Difference]: Without dead ends: 72 [2020-10-26 19:03:13,654 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=311, Invalid=949, Unknown=0, NotChecked=0, Total=1260 [2020-10-26 19:03:13,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-26 19:03:13,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 70. [2020-10-26 19:03:13,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-26 19:03:13,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 74 transitions. [2020-10-26 19:03:13,663 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 74 transitions. Word has length 114 [2020-10-26 19:03:13,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:03:13,663 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 74 transitions. [2020-10-26 19:03:13,663 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-26 19:03:13,663 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 74 transitions. [2020-10-26 19:03:13,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-10-26 19:03:13,670 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:03:13,670 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 11, 11, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:03:13,670 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-26 19:03:13,670 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:03:13,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:03:13,673 INFO L82 PathProgramCache]: Analyzing trace with hash 710787985, now seen corresponding path program 11 times [2020-10-26 19:03:13,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:03:13,673 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [763497949] [2020-10-26 19:03:13,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:03:13,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:03:13,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:13,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:13,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:13,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:18,704 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:03:18,704 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 136 [2020-10-26 19:03:18,704 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:03:18,704 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-26 19:03:18,705 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:03:18,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-26 19:03:18,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:03:18,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-26 19:03:18,705 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:03:18,859 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:03:18,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:03:18,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:18,864 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:03:18,864 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:03:18,864 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:03:18,864 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:03:18,864 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:03:18,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:03:18,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:03:18,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:03:18,865 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:03:18,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-26 19:03:18,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:03:18,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:18,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:18,952 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:03:18,952 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-26 19:03:18,953 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:03:18,953 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 82 [2020-10-26 19:03:18,953 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:03:18,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-26 19:03:18,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:03:18,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-26 19:03:18,954 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:03:19,286 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-10-26 19:03:19,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:03:19,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:19,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:19,388 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:03:19,388 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-26 19:03:19,388 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:03:19,389 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 97 [2020-10-26 19:03:19,389 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:03:19,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-26 19:03:19,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:03:19,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-26 19:03:19,390 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:03:19,397 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2020-10-26 19:03:19,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:03:19,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:19,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:19,485 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:03:19,485 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-26 19:03:19,485 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:03:19,486 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 83 [2020-10-26 19:03:19,486 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:03:19,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-26 19:03:19,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:03:19,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-26 19:03:19,487 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:03:19,523 INFO L134 CoverageAnalysis]: Checked inductivity of 1291 backedges. 363 proven. 847 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2020-10-26 19:03:19,524 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [763497949] [2020-10-26 19:03:19,524 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:03:19,524 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-26 19:03:19,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477664824] [2020-10-26 19:03:19,525 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-26 19:03:19,525 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:03:19,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-26 19:03:19,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=519, Unknown=0, NotChecked=0, Total=702 [2020-10-26 19:03:19,526 INFO L87 Difference]: Start difference. First operand 70 states and 74 transitions. Second operand 27 states. [2020-10-26 19:03:20,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:03:20,307 INFO L93 Difference]: Finished difference Result 117 states and 129 transitions. [2020-10-26 19:03:20,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-26 19:03:20,307 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 122 [2020-10-26 19:03:20,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:03:20,311 INFO L225 Difference]: With dead ends: 117 [2020-10-26 19:03:20,311 INFO L226 Difference]: Without dead ends: 76 [2020-10-26 19:03:20,312 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=363, Invalid=1119, Unknown=0, NotChecked=0, Total=1482 [2020-10-26 19:03:20,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-26 19:03:20,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 74. [2020-10-26 19:03:20,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-26 19:03:20,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 78 transitions. [2020-10-26 19:03:20,328 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 78 transitions. Word has length 122 [2020-10-26 19:03:20,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:03:20,329 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 78 transitions. [2020-10-26 19:03:20,329 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-26 19:03:20,331 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 78 transitions. [2020-10-26 19:03:20,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-10-26 19:03:20,333 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:03:20,333 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 12, 12, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:03:20,333 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-26 19:03:20,333 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:03:20,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:03:20,334 INFO L82 PathProgramCache]: Analyzing trace with hash -1353556399, now seen corresponding path program 12 times [2020-10-26 19:03:20,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:03:20,338 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [746563535] [2020-10-26 19:03:20,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:03:20,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:03:20,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:20,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:20,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:20,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:25,366 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:03:25,366 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 144 [2020-10-26 19:03:25,366 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:03:25,366 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-26 19:03:25,366 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:03:25,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-26 19:03:25,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:03:25,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-26 19:03:25,366 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:03:25,547 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:03:25,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:03:25,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:25,552 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:03:25,552 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:03:25,552 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:03:25,553 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:03:25,553 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:03:25,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:03:25,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:03:25,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:03:25,553 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:03:25,555 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-10-26 19:03:25,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:03:25,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:25,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:25,625 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:03:25,625 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-26 19:03:25,625 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:03:25,625 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 66 [2020-10-26 19:03:25,625 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:03:25,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-26 19:03:25,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:03:25,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-26 19:03:25,626 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:03:25,887 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2020-10-26 19:03:25,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:03:25,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:25,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:25,956 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:03:25,956 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-26 19:03:25,956 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:03:25,956 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 65 [2020-10-26 19:03:25,956 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:03:25,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-26 19:03:25,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:03:25,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-26 19:03:25,957 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:03:25,963 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-26 19:03:25,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:03:25,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:25,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:26,025 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:03:26,025 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-26 19:03:26,026 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:03:26,026 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 56 [2020-10-26 19:03:26,026 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:03:26,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-26 19:03:26,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:03:26,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-26 19:03:26,026 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:03:26,052 INFO L134 CoverageAnalysis]: Checked inductivity of 1527 backedges. 432 proven. 1008 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2020-10-26 19:03:26,052 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [746563535] [2020-10-26 19:03:26,052 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:03:26,052 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-26 19:03:26,053 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776203433] [2020-10-26 19:03:26,053 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-26 19:03:26,053 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:03:26,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-26 19:03:26,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=211, Invalid=601, Unknown=0, NotChecked=0, Total=812 [2020-10-26 19:03:26,054 INFO L87 Difference]: Start difference. First operand 74 states and 78 transitions. Second operand 29 states. [2020-10-26 19:03:26,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:03:26,956 INFO L93 Difference]: Finished difference Result 123 states and 135 transitions. [2020-10-26 19:03:26,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-26 19:03:26,957 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 130 [2020-10-26 19:03:26,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:03:26,958 INFO L225 Difference]: With dead ends: 123 [2020-10-26 19:03:26,958 INFO L226 Difference]: Without dead ends: 80 [2020-10-26 19:03:26,960 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=419, Invalid=1303, Unknown=0, NotChecked=0, Total=1722 [2020-10-26 19:03:26,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-26 19:03:26,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 78. [2020-10-26 19:03:26,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-26 19:03:26,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 82 transitions. [2020-10-26 19:03:26,971 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 82 transitions. Word has length 130 [2020-10-26 19:03:26,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:03:26,971 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 82 transitions. [2020-10-26 19:03:26,971 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-26 19:03:26,972 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 82 transitions. [2020-10-26 19:03:26,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-10-26 19:03:26,973 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:03:26,973 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 13, 13, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:03:26,973 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-26 19:03:26,973 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:03:26,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:03:26,973 INFO L82 PathProgramCache]: Analyzing trace with hash 236693265, now seen corresponding path program 13 times [2020-10-26 19:03:26,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:03:26,974 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1689616265] [2020-10-26 19:03:26,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:03:26,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:03:26,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:27,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:27,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:27,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:31,995 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:03:31,995 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 152 [2020-10-26 19:03:31,995 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:03:31,995 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-26 19:03:31,995 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:03:31,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-26 19:03:31,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:03:31,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-26 19:03:31,996 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:03:32,180 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:03:32,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:03:32,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:32,185 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:03:32,185 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:03:32,185 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:03:32,185 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:03:32,185 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:03:32,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:03:32,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:03:32,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:03:32,185 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:03:32,187 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-10-26 19:03:32,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:03:32,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:32,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:32,237 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:03:32,237 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-26 19:03:32,237 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:03:32,237 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 48 [2020-10-26 19:03:32,237 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:03:32,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-26 19:03:32,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:03:32,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-26 19:03:32,238 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:03:32,561 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2020-10-26 19:03:32,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:03:32,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:32,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:32,626 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:03:32,626 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-26 19:03:32,626 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:03:32,626 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 61 [2020-10-26 19:03:32,626 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:03:32,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-26 19:03:32,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:03:32,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-26 19:03:32,627 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:03:32,635 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2020-10-26 19:03:32,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:03:32,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:32,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:32,692 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:03:32,692 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-26 19:03:32,692 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:03:32,692 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 53 [2020-10-26 19:03:32,692 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:03:32,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-26 19:03:32,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:03:32,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-26 19:03:32,693 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:03:32,715 INFO L134 CoverageAnalysis]: Checked inductivity of 1783 backedges. 507 proven. 1183 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2020-10-26 19:03:32,716 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1689616265] [2020-10-26 19:03:32,716 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:03:32,716 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-26 19:03:32,716 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474806510] [2020-10-26 19:03:32,717 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-26 19:03:32,717 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:03:32,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-26 19:03:32,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=241, Invalid=689, Unknown=0, NotChecked=0, Total=930 [2020-10-26 19:03:32,718 INFO L87 Difference]: Start difference. First operand 78 states and 82 transitions. Second operand 31 states. [2020-10-26 19:03:33,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:03:33,703 INFO L93 Difference]: Finished difference Result 129 states and 141 transitions. [2020-10-26 19:03:33,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-26 19:03:33,703 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 138 [2020-10-26 19:03:33,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:03:33,705 INFO L225 Difference]: With dead ends: 129 [2020-10-26 19:03:33,705 INFO L226 Difference]: Without dead ends: 84 [2020-10-26 19:03:33,706 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=479, Invalid=1501, Unknown=0, NotChecked=0, Total=1980 [2020-10-26 19:03:33,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-26 19:03:33,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 82. [2020-10-26 19:03:33,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-26 19:03:33,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 86 transitions. [2020-10-26 19:03:33,721 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 86 transitions. Word has length 138 [2020-10-26 19:03:33,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:03:33,722 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 86 transitions. [2020-10-26 19:03:33,722 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-26 19:03:33,722 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 86 transitions. [2020-10-26 19:03:33,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-10-26 19:03:33,724 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:03:33,724 INFO L422 BasicCegarLoop]: trace histogram [42, 42, 14, 14, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:03:33,725 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-26 19:03:33,725 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:03:33,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:03:33,725 INFO L82 PathProgramCache]: Analyzing trace with hash 459316689, now seen corresponding path program 14 times [2020-10-26 19:03:33,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:03:33,726 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1275749125] [2020-10-26 19:03:33,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:03:33,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:03:33,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:33,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:33,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:33,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:38,753 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:03:38,754 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 160 [2020-10-26 19:03:38,754 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:03:38,754 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-26 19:03:38,754 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:03:38,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-26 19:03:38,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:03:38,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-26 19:03:38,754 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:03:38,974 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:03:38,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:03:38,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:38,980 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:03:38,980 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:03:38,980 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:03:38,980 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:03:38,980 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:03:38,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:03:38,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:03:38,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:03:38,980 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:03:38,982 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-10-26 19:03:38,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:03:38,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:38,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:39,037 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:03:39,037 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-26 19:03:39,037 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:03:39,037 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 52 [2020-10-26 19:03:39,037 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:03:39,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-26 19:03:39,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:03:39,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-26 19:03:39,037 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:03:39,404 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2020-10-26 19:03:39,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:03:39,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:39,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:39,485 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:03:39,485 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-26 19:03:39,485 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:03:39,485 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 75 [2020-10-26 19:03:39,485 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:03:39,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-26 19:03:39,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:03:39,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-26 19:03:39,485 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:03:39,491 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2020-10-26 19:03:39,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:03:39,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:39,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:39,567 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:03:39,568 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-26 19:03:39,568 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:03:39,568 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 72 [2020-10-26 19:03:39,568 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:03:39,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-26 19:03:39,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:03:39,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-26 19:03:39,569 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:03:39,599 INFO L134 CoverageAnalysis]: Checked inductivity of 2059 backedges. 588 proven. 1372 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2020-10-26 19:03:39,600 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1275749125] [2020-10-26 19:03:39,600 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:03:39,600 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-26 19:03:39,600 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464174298] [2020-10-26 19:03:39,601 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-26 19:03:39,601 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:03:39,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-26 19:03:39,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=273, Invalid=783, Unknown=0, NotChecked=0, Total=1056 [2020-10-26 19:03:39,602 INFO L87 Difference]: Start difference. First operand 82 states and 86 transitions. Second operand 33 states. [2020-10-26 19:03:40,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:03:40,676 INFO L93 Difference]: Finished difference Result 135 states and 147 transitions. [2020-10-26 19:03:40,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-26 19:03:40,677 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 146 [2020-10-26 19:03:40,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:03:40,678 INFO L225 Difference]: With dead ends: 135 [2020-10-26 19:03:40,678 INFO L226 Difference]: Without dead ends: 88 [2020-10-26 19:03:40,679 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=543, Invalid=1713, Unknown=0, NotChecked=0, Total=2256 [2020-10-26 19:03:40,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-26 19:03:40,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 86. [2020-10-26 19:03:40,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-26 19:03:40,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 90 transitions. [2020-10-26 19:03:40,686 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 90 transitions. Word has length 146 [2020-10-26 19:03:40,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:03:40,686 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 90 transitions. [2020-10-26 19:03:40,687 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-26 19:03:40,687 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 90 transitions. [2020-10-26 19:03:40,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2020-10-26 19:03:40,688 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:03:40,689 INFO L422 BasicCegarLoop]: trace histogram [45, 45, 15, 15, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:03:40,689 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-26 19:03:40,689 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:03:40,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:03:40,689 INFO L82 PathProgramCache]: Analyzing trace with hash 2062041745, now seen corresponding path program 15 times [2020-10-26 19:03:40,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:03:40,690 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1907602122] [2020-10-26 19:03:40,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:03:40,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:03:40,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:40,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:40,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:40,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:45,712 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:03:45,713 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 168 [2020-10-26 19:03:45,713 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:03:45,713 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-26 19:03:45,713 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:03:45,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-26 19:03:45,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:03:45,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-26 19:03:45,713 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:03:45,951 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:03:45,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:03:45,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:45,957 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:03:45,957 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:03:45,957 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:03:45,958 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:03:45,958 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:03:45,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:03:45,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:03:45,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:03:45,958 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:03:45,960 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-10-26 19:03:45,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:03:45,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:45,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:46,022 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:03:46,022 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-26 19:03:46,022 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:03:46,022 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 58 [2020-10-26 19:03:46,022 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:03:46,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-26 19:03:46,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:03:46,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-26 19:03:46,022 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:03:46,426 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2020-10-26 19:03:46,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:03:46,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:46,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:46,527 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:03:46,527 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-26 19:03:46,527 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:03:46,527 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 95 [2020-10-26 19:03:46,527 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:03:46,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-26 19:03:46,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:03:46,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-26 19:03:46,528 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:03:46,535 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2020-10-26 19:03:46,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:03:46,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:46,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:46,595 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:03:46,595 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-26 19:03:46,595 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:03:46,596 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 56 [2020-10-26 19:03:46,596 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:03:46,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-26 19:03:46,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:03:46,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-26 19:03:46,596 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:03:46,630 INFO L134 CoverageAnalysis]: Checked inductivity of 2355 backedges. 675 proven. 1575 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2020-10-26 19:03:46,630 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1907602122] [2020-10-26 19:03:46,630 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:03:46,631 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-26 19:03:46,631 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049660180] [2020-10-26 19:03:46,631 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-26 19:03:46,631 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:03:46,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-26 19:03:46,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=307, Invalid=883, Unknown=0, NotChecked=0, Total=1190 [2020-10-26 19:03:46,633 INFO L87 Difference]: Start difference. First operand 86 states and 90 transitions. Second operand 35 states. [2020-10-26 19:03:47,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:03:47,842 INFO L93 Difference]: Finished difference Result 141 states and 153 transitions. [2020-10-26 19:03:47,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-26 19:03:47,842 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 154 [2020-10-26 19:03:47,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:03:47,844 INFO L225 Difference]: With dead ends: 141 [2020-10-26 19:03:47,844 INFO L226 Difference]: Without dead ends: 92 [2020-10-26 19:03:47,846 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 375 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=611, Invalid=1939, Unknown=0, NotChecked=0, Total=2550 [2020-10-26 19:03:47,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-26 19:03:47,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 90. [2020-10-26 19:03:47,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-10-26 19:03:47,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 94 transitions. [2020-10-26 19:03:47,854 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 94 transitions. Word has length 154 [2020-10-26 19:03:47,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:03:47,855 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 94 transitions. [2020-10-26 19:03:47,855 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-26 19:03:47,855 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 94 transitions. [2020-10-26 19:03:47,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2020-10-26 19:03:47,857 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:03:47,858 INFO L422 BasicCegarLoop]: trace histogram [48, 48, 16, 16, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:03:47,858 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-26 19:03:47,858 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:03:47,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:03:47,858 INFO L82 PathProgramCache]: Analyzing trace with hash -1885760175, now seen corresponding path program 16 times [2020-10-26 19:03:47,859 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:03:47,859 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1896600449] [2020-10-26 19:03:47,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:03:47,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:03:47,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:47,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:47,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:47,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:52,891 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:03:52,891 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 176 [2020-10-26 19:03:52,891 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:03:52,891 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-26 19:03:52,891 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:03:52,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-26 19:03:52,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:03:52,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-26 19:03:52,892 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:03:53,162 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:03:53,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:03:53,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:53,167 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:03:53,167 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:03:53,167 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:03:53,167 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:03:53,167 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:03:53,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:03:53,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:03:53,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:03:53,168 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:03:53,170 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-10-26 19:03:53,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:03:53,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:53,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:53,279 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:03:53,280 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-26 19:03:53,280 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:03:53,280 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 105 [2020-10-26 19:03:53,280 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:03:53,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-26 19:03:53,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:03:53,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-26 19:03:53,281 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:03:53,749 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2020-10-26 19:03:53,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:03:53,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:53,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:53,851 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:03:53,851 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-26 19:03:53,851 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:03:53,851 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 96 [2020-10-26 19:03:53,851 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:03:53,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-26 19:03:53,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:03:53,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-26 19:03:53,852 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:03:53,859 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2020-10-26 19:03:53,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:03:53,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:53,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:53,931 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:03:53,932 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-26 19:03:53,932 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:03:53,932 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 68 [2020-10-26 19:03:53,932 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:03:53,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-26 19:03:53,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:03:53,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-26 19:03:53,932 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:03:53,956 INFO L134 CoverageAnalysis]: Checked inductivity of 2671 backedges. 768 proven. 1792 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2020-10-26 19:03:53,956 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1896600449] [2020-10-26 19:03:53,956 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:03:53,957 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-26 19:03:53,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331685985] [2020-10-26 19:03:53,957 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-26 19:03:53,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:03:53,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-26 19:03:53,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=343, Invalid=989, Unknown=0, NotChecked=0, Total=1332 [2020-10-26 19:03:53,958 INFO L87 Difference]: Start difference. First operand 90 states and 94 transitions. Second operand 37 states. [2020-10-26 19:03:55,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:03:55,022 INFO L93 Difference]: Finished difference Result 147 states and 159 transitions. [2020-10-26 19:03:55,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-26 19:03:55,022 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 162 [2020-10-26 19:03:55,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:03:55,024 INFO L225 Difference]: With dead ends: 147 [2020-10-26 19:03:55,024 INFO L226 Difference]: Without dead ends: 96 [2020-10-26 19:03:55,026 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 424 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=683, Invalid=2179, Unknown=0, NotChecked=0, Total=2862 [2020-10-26 19:03:55,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-26 19:03:55,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 94. [2020-10-26 19:03:55,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-26 19:03:55,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 98 transitions. [2020-10-26 19:03:55,033 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 98 transitions. Word has length 162 [2020-10-26 19:03:55,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:03:55,034 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 98 transitions. [2020-10-26 19:03:55,034 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-26 19:03:55,034 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 98 transitions. [2020-10-26 19:03:55,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2020-10-26 19:03:55,036 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:03:55,036 INFO L422 BasicCegarLoop]: trace histogram [51, 51, 17, 17, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:03:55,036 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-26 19:03:55,036 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:03:55,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:03:55,037 INFO L82 PathProgramCache]: Analyzing trace with hash 1803261457, now seen corresponding path program 17 times [2020-10-26 19:03:55,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:03:55,037 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1485635902] [2020-10-26 19:03:55,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:03:55,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:03:55,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:55,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:55,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:55,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:00,070 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:04:00,070 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 184 [2020-10-26 19:04:00,070 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:04:00,070 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-26 19:04:00,070 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:04:00,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-26 19:04:00,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:04:00,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-26 19:04:00,070 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:04:00,324 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:04:00,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:04:00,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:00,329 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:04:00,329 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:04:00,329 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:04:00,329 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:04:00,329 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:04:00,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:04:00,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:04:00,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:04:00,330 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:04:00,332 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-10-26 19:04:00,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:04:00,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:00,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:00,412 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:04:00,413 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-26 19:04:00,413 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:04:00,413 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 77 [2020-10-26 19:04:00,413 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:04:00,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-26 19:04:00,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:04:00,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-26 19:04:00,414 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:04:00,925 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2020-10-26 19:04:00,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:04:00,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:00,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:00,987 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:04:00,987 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-26 19:04:00,987 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:04:00,987 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 57 [2020-10-26 19:04:00,987 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:04:00,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-26 19:04:00,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:04:00,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-26 19:04:00,988 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:04:00,993 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2020-10-26 19:04:00,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:04:00,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:01,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:01,073 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:04:01,073 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-26 19:04:01,073 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:04:01,073 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 75 [2020-10-26 19:04:01,073 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:04:01,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-26 19:04:01,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:04:01,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-26 19:04:01,073 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:04:01,102 INFO L134 CoverageAnalysis]: Checked inductivity of 3007 backedges. 867 proven. 2023 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2020-10-26 19:04:01,102 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1485635902] [2020-10-26 19:04:01,102 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:04:01,102 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-26 19:04:01,103 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572155402] [2020-10-26 19:04:01,103 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-26 19:04:01,103 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:04:01,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-26 19:04:01,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=381, Invalid=1101, Unknown=0, NotChecked=0, Total=1482 [2020-10-26 19:04:01,105 INFO L87 Difference]: Start difference. First operand 94 states and 98 transitions. Second operand 39 states. [2020-10-26 19:04:02,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:04:02,497 INFO L93 Difference]: Finished difference Result 153 states and 165 transitions. [2020-10-26 19:04:02,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-26 19:04:02,497 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 170 [2020-10-26 19:04:02,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:04:02,499 INFO L225 Difference]: With dead ends: 153 [2020-10-26 19:04:02,499 INFO L226 Difference]: Without dead ends: 100 [2020-10-26 19:04:02,501 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 476 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=759, Invalid=2433, Unknown=0, NotChecked=0, Total=3192 [2020-10-26 19:04:02,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-26 19:04:02,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 98. [2020-10-26 19:04:02,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-26 19:04:02,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 102 transitions. [2020-10-26 19:04:02,507 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 102 transitions. Word has length 170 [2020-10-26 19:04:02,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:04:02,508 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 102 transitions. [2020-10-26 19:04:02,508 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-26 19:04:02,508 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 102 transitions. [2020-10-26 19:04:02,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2020-10-26 19:04:02,509 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:04:02,509 INFO L422 BasicCegarLoop]: trace histogram [54, 54, 18, 18, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:04:02,509 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-26 19:04:02,510 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:04:02,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:04:02,510 INFO L82 PathProgramCache]: Analyzing trace with hash -1078639407, now seen corresponding path program 18 times [2020-10-26 19:04:02,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:04:02,511 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [976912055] [2020-10-26 19:04:02,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:04:02,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:04:02,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:02,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:02,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:02,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:07,539 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:04:07,540 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 192 [2020-10-26 19:04:07,540 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:04:07,540 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-26 19:04:07,540 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:04:07,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-26 19:04:07,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:04:07,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-26 19:04:07,540 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:04:07,857 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:04:07,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:04:07,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:07,861 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:04:07,861 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:04:07,862 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:04:07,862 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:04:07,862 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:04:07,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:04:07,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:04:07,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:04:07,862 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:04:07,863 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-10-26 19:04:07,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:04:07,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:07,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:07,957 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:04:07,957 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-26 19:04:07,957 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:04:07,958 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 89 [2020-10-26 19:04:07,958 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:04:07,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-26 19:04:07,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:04:07,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-26 19:04:07,958 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:04:08,512 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2020-10-26 19:04:08,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:04:08,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:08,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:08,595 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:04:08,595 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-26 19:04:08,595 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:04:08,595 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 79 [2020-10-26 19:04:08,595 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:04:08,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-26 19:04:08,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:04:08,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-26 19:04:08,596 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:04:08,602 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2020-10-26 19:04:08,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:04:08,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:08,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:08,687 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:04:08,687 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-26 19:04:08,687 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:04:08,687 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 80 [2020-10-26 19:04:08,687 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:04:08,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-26 19:04:08,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:04:08,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-26 19:04:08,688 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:04:08,720 INFO L134 CoverageAnalysis]: Checked inductivity of 3363 backedges. 972 proven. 2268 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2020-10-26 19:04:08,720 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [976912055] [2020-10-26 19:04:08,720 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:04:08,720 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-26 19:04:08,720 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773681420] [2020-10-26 19:04:08,721 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-26 19:04:08,721 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:04:08,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-26 19:04:08,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=421, Invalid=1219, Unknown=0, NotChecked=0, Total=1640 [2020-10-26 19:04:08,722 INFO L87 Difference]: Start difference. First operand 98 states and 102 transitions. Second operand 41 states. [2020-10-26 19:04:10,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:04:10,201 INFO L93 Difference]: Finished difference Result 159 states and 171 transitions. [2020-10-26 19:04:10,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-26 19:04:10,202 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 178 [2020-10-26 19:04:10,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:04:10,203 INFO L225 Difference]: With dead ends: 159 [2020-10-26 19:04:10,203 INFO L226 Difference]: Without dead ends: 104 [2020-10-26 19:04:10,205 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 531 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=839, Invalid=2701, Unknown=0, NotChecked=0, Total=3540 [2020-10-26 19:04:10,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-10-26 19:04:10,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 102. [2020-10-26 19:04:10,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-10-26 19:04:10,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 106 transitions. [2020-10-26 19:04:10,215 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 106 transitions. Word has length 178 [2020-10-26 19:04:10,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:04:10,216 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 106 transitions. [2020-10-26 19:04:10,216 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-26 19:04:10,216 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 106 transitions. [2020-10-26 19:04:10,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2020-10-26 19:04:10,218 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:04:10,218 INFO L422 BasicCegarLoop]: trace histogram [57, 57, 19, 19, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:04:10,218 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-26 19:04:10,218 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:04:10,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:04:10,219 INFO L82 PathProgramCache]: Analyzing trace with hash -863133295, now seen corresponding path program 19 times [2020-10-26 19:04:10,220 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:04:10,220 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1136990785] [2020-10-26 19:04:10,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:04:10,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:04:10,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:10,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:10,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:10,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:15,246 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:04:15,246 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 200 [2020-10-26 19:04:15,246 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:04:15,246 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-26 19:04:15,246 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:04:15,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-26 19:04:15,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:04:15,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-26 19:04:15,247 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:04:15,596 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:04:15,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:04:15,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:15,601 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:04:15,601 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:04:15,601 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:04:15,601 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:04:15,602 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:04:15,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:04:15,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:04:15,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:04:15,602 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:04:15,603 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-10-26 19:04:15,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:04:15,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:15,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:15,695 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:04:15,696 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-26 19:04:15,696 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:04:15,696 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 87 [2020-10-26 19:04:15,696 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:04:15,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-26 19:04:15,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:04:15,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-26 19:04:15,697 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:04:16,314 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2020-10-26 19:04:16,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:04:16,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:16,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:16,409 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:04:16,409 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-26 19:04:16,409 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:04:16,409 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 89 [2020-10-26 19:04:16,410 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:04:16,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-26 19:04:16,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:04:16,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-26 19:04:16,410 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:04:16,420 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2020-10-26 19:04:16,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:04:16,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:16,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:16,554 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:04:16,554 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-26 19:04:16,554 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:04:16,555 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 129 [2020-10-26 19:04:16,555 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:04:16,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-26 19:04:16,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:04:16,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-26 19:04:16,555 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:04:16,595 INFO L134 CoverageAnalysis]: Checked inductivity of 3739 backedges. 1083 proven. 2527 refuted. 0 times theorem prover too weak. 129 trivial. 0 not checked. [2020-10-26 19:04:16,595 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1136990785] [2020-10-26 19:04:16,595 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:04:16,595 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-10-26 19:04:16,595 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640864777] [2020-10-26 19:04:16,597 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-10-26 19:04:16,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:04:16,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-10-26 19:04:16,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=463, Invalid=1343, Unknown=0, NotChecked=0, Total=1806 [2020-10-26 19:04:16,598 INFO L87 Difference]: Start difference. First operand 102 states and 106 transitions. Second operand 43 states. [2020-10-26 19:04:18,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:04:18,139 INFO L93 Difference]: Finished difference Result 165 states and 177 transitions. [2020-10-26 19:04:18,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-26 19:04:18,140 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 186 [2020-10-26 19:04:18,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:04:18,141 INFO L225 Difference]: With dead ends: 165 [2020-10-26 19:04:18,142 INFO L226 Difference]: Without dead ends: 108 [2020-10-26 19:04:18,144 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 589 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=923, Invalid=2983, Unknown=0, NotChecked=0, Total=3906 [2020-10-26 19:04:18,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-10-26 19:04:18,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 106. [2020-10-26 19:04:18,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-10-26 19:04:18,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 110 transitions. [2020-10-26 19:04:18,151 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 110 transitions. Word has length 186 [2020-10-26 19:04:18,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:04:18,151 INFO L481 AbstractCegarLoop]: Abstraction has 106 states and 110 transitions. [2020-10-26 19:04:18,151 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-10-26 19:04:18,151 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 110 transitions. [2020-10-26 19:04:18,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2020-10-26 19:04:18,156 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:04:18,157 INFO L422 BasicCegarLoop]: trace histogram [60, 60, 20, 20, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:04:18,157 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-26 19:04:18,157 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:04:18,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:04:18,157 INFO L82 PathProgramCache]: Analyzing trace with hash 1366010961, now seen corresponding path program 20 times [2020-10-26 19:04:18,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:04:18,158 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [288856465] [2020-10-26 19:04:18,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:04:18,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:04:18,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:18,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:18,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:18,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:23,189 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:04:23,189 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 208 [2020-10-26 19:04:23,189 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:04:23,189 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-26 19:04:23,189 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:04:23,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-26 19:04:23,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:04:23,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-26 19:04:23,190 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:04:23,568 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:04:23,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:04:23,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:23,574 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:04:23,575 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:04:23,575 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:04:23,575 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:04:23,575 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:04:23,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:04:23,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:04:23,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:04:23,575 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:04:23,576 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-10-26 19:04:23,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:04:23,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:23,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:23,667 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:04:23,668 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-26 19:04:23,668 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:04:23,668 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 86 [2020-10-26 19:04:23,668 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:04:23,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-26 19:04:23,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:04:23,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-26 19:04:23,668 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:04:24,351 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2020-10-26 19:04:24,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:04:24,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:24,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:24,449 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:04:24,449 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-26 19:04:24,449 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:04:24,449 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 93 [2020-10-26 19:04:24,449 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:04:24,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-26 19:04:24,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:04:24,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-26 19:04:24,449 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:04:24,456 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2020-10-26 19:04:24,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:04:24,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:24,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:24,562 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:04:24,563 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-26 19:04:24,563 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:04:24,563 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 103 [2020-10-26 19:04:24,563 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:04:24,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-26 19:04:24,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:04:24,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-26 19:04:24,563 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:04:24,596 INFO L134 CoverageAnalysis]: Checked inductivity of 4135 backedges. 1200 proven. 2800 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2020-10-26 19:04:24,597 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [288856465] [2020-10-26 19:04:24,597 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:04:24,597 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2020-10-26 19:04:24,597 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307876571] [2020-10-26 19:04:24,597 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-10-26 19:04:24,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:04:24,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-10-26 19:04:24,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=507, Invalid=1473, Unknown=0, NotChecked=0, Total=1980 [2020-10-26 19:04:24,599 INFO L87 Difference]: Start difference. First operand 106 states and 110 transitions. Second operand 45 states. [2020-10-26 19:04:26,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:04:26,304 INFO L93 Difference]: Finished difference Result 171 states and 183 transitions. [2020-10-26 19:04:26,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-26 19:04:26,308 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 194 [2020-10-26 19:04:26,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:04:26,309 INFO L225 Difference]: With dead ends: 171 [2020-10-26 19:04:26,309 INFO L226 Difference]: Without dead ends: 112 [2020-10-26 19:04:26,313 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 650 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1011, Invalid=3279, Unknown=0, NotChecked=0, Total=4290 [2020-10-26 19:04:26,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-26 19:04:26,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 110. [2020-10-26 19:04:26,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-26 19:04:26,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 114 transitions. [2020-10-26 19:04:26,320 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 114 transitions. Word has length 194 [2020-10-26 19:04:26,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:04:26,320 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 114 transitions. [2020-10-26 19:04:26,320 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-10-26 19:04:26,321 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 114 transitions. [2020-10-26 19:04:26,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2020-10-26 19:04:26,322 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:04:26,322 INFO L422 BasicCegarLoop]: trace histogram [63, 63, 21, 21, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:04:26,322 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-26 19:04:26,322 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:04:26,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:04:26,323 INFO L82 PathProgramCache]: Analyzing trace with hash 2094425361, now seen corresponding path program 21 times [2020-10-26 19:04:26,323 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:04:26,323 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1369761504] [2020-10-26 19:04:26,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:04:26,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:04:26,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:26,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:26,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:26,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:31,350 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:04:31,350 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 216 [2020-10-26 19:04:31,350 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:04:31,350 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-26 19:04:31,350 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:04:31,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-26 19:04:31,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:04:31,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-26 19:04:31,351 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:04:31,761 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:04:31,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:04:31,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:31,767 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:04:31,767 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:04:31,767 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:04:31,767 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:04:31,767 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:04:31,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:04:31,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:04:31,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:04:31,767 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:04:31,769 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-10-26 19:04:31,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:04:31,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:31,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:31,873 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:04:31,873 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-26 19:04:31,874 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:04:31,874 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 100 [2020-10-26 19:04:31,874 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:04:31,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-26 19:04:31,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:04:31,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-26 19:04:31,874 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:04:32,606 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2020-10-26 19:04:32,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:04:32,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:32,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:32,705 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:04:32,705 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-26 19:04:32,705 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:04:32,705 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 95 [2020-10-26 19:04:32,706 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:04:32,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-26 19:04:32,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:04:32,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-26 19:04:32,706 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:04:32,717 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 149 [2020-10-26 19:04:32,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:04:32,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:32,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:32,893 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:04:32,894 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-26 19:04:32,894 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:04:32,894 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 171 [2020-10-26 19:04:32,895 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:04:32,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-26 19:04:32,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:04:32,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-26 19:04:32,895 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:04:32,992 INFO L134 CoverageAnalysis]: Checked inductivity of 4551 backedges. 1323 proven. 3087 refuted. 0 times theorem prover too weak. 141 trivial. 0 not checked. [2020-10-26 19:04:32,992 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1369761504] [2020-10-26 19:04:32,993 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:04:32,993 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2020-10-26 19:04:32,993 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315968141] [2020-10-26 19:04:32,994 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-10-26 19:04:32,997 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:04:32,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-10-26 19:04:33,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=553, Invalid=1609, Unknown=0, NotChecked=0, Total=2162 [2020-10-26 19:04:33,005 INFO L87 Difference]: Start difference. First operand 110 states and 114 transitions. Second operand 47 states. [2020-10-26 19:04:34,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:04:34,712 INFO L93 Difference]: Finished difference Result 177 states and 189 transitions. [2020-10-26 19:04:34,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-26 19:04:34,713 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 202 [2020-10-26 19:04:34,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:04:34,714 INFO L225 Difference]: With dead ends: 177 [2020-10-26 19:04:34,714 INFO L226 Difference]: Without dead ends: 116 [2020-10-26 19:04:34,717 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 714 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1103, Invalid=3589, Unknown=0, NotChecked=0, Total=4692 [2020-10-26 19:04:34,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-10-26 19:04:34,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 114. [2020-10-26 19:04:34,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-10-26 19:04:34,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 118 transitions. [2020-10-26 19:04:34,724 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 118 transitions. Word has length 202 [2020-10-26 19:04:34,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:04:34,724 INFO L481 AbstractCegarLoop]: Abstraction has 114 states and 118 transitions. [2020-10-26 19:04:34,724 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-10-26 19:04:34,724 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 118 transitions. [2020-10-26 19:04:34,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2020-10-26 19:04:34,726 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:04:34,726 INFO L422 BasicCegarLoop]: trace histogram [66, 66, 22, 22, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:04:34,726 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-26 19:04:34,726 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:04:34,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:04:34,727 INFO L82 PathProgramCache]: Analyzing trace with hash -596325423, now seen corresponding path program 22 times [2020-10-26 19:04:34,727 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:04:34,727 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1564968082] [2020-10-26 19:04:34,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:04:34,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:04:34,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:34,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:34,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:34,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:39,756 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:04:39,756 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 224 [2020-10-26 19:04:39,757 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:04:39,757 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-26 19:04:39,757 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:04:39,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-26 19:04:39,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:04:39,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-26 19:04:39,757 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:04:40,174 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:04:40,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:04:40,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:40,181 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:04:40,181 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:04:40,181 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:04:40,181 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:04:40,181 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:04:40,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:04:40,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:04:40,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:04:40,182 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:04:40,184 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-10-26 19:04:40,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:04:40,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:40,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:40,357 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:04:40,357 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-26 19:04:40,357 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:04:40,357 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 168 [2020-10-26 19:04:40,357 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:04:40,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-26 19:04:40,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:04:40,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-26 19:04:40,358 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:04:41,164 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2020-10-26 19:04:41,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:04:41,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:41,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:41,270 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:04:41,270 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-26 19:04:41,270 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:04:41,271 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 102 [2020-10-26 19:04:41,271 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:04:41,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-26 19:04:41,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:04:41,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-26 19:04:41,271 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:04:41,277 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 155 [2020-10-26 19:04:41,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:04:41,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:41,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:41,381 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:04:41,382 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-26 19:04:41,382 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:04:41,382 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 101 [2020-10-26 19:04:41,382 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:04:41,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-26 19:04:41,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:04:41,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-26 19:04:41,382 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:04:41,421 INFO L134 CoverageAnalysis]: Checked inductivity of 4987 backedges. 1452 proven. 3388 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2020-10-26 19:04:41,421 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1564968082] [2020-10-26 19:04:41,422 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:04:41,422 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2020-10-26 19:04:41,422 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971158254] [2020-10-26 19:04:41,422 INFO L461 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-10-26 19:04:41,422 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:04:41,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-10-26 19:04:41,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=601, Invalid=1751, Unknown=0, NotChecked=0, Total=2352 [2020-10-26 19:04:41,423 INFO L87 Difference]: Start difference. First operand 114 states and 118 transitions. Second operand 49 states. [2020-10-26 19:04:43,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:04:43,238 INFO L93 Difference]: Finished difference Result 183 states and 195 transitions. [2020-10-26 19:04:43,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-10-26 19:04:43,239 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 210 [2020-10-26 19:04:43,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:04:43,240 INFO L225 Difference]: With dead ends: 183 [2020-10-26 19:04:43,240 INFO L226 Difference]: Without dead ends: 120 [2020-10-26 19:04:43,243 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 781 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1199, Invalid=3913, Unknown=0, NotChecked=0, Total=5112 [2020-10-26 19:04:43,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-10-26 19:04:43,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 118. [2020-10-26 19:04:43,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-26 19:04:43,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 122 transitions. [2020-10-26 19:04:43,253 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 122 transitions. Word has length 210 [2020-10-26 19:04:43,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:04:43,253 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 122 transitions. [2020-10-26 19:04:43,254 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-10-26 19:04:43,254 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 122 transitions. [2020-10-26 19:04:43,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2020-10-26 19:04:43,255 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:04:43,255 INFO L422 BasicCegarLoop]: trace histogram [69, 69, 23, 23, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:04:43,257 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-26 19:04:43,257 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:04:43,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:04:43,258 INFO L82 PathProgramCache]: Analyzing trace with hash 1292755089, now seen corresponding path program 23 times [2020-10-26 19:04:43,258 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:04:43,258 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2060030266] [2020-10-26 19:04:43,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:04:43,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:04:43,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:43,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:43,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:43,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:48,299 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:04:48,300 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 232 [2020-10-26 19:04:48,300 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:04:48,300 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-26 19:04:48,300 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:04:48,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-26 19:04:48,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:04:48,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-26 19:04:48,300 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:04:48,772 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:04:48,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:04:48,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:48,779 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:04:48,779 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:04:48,779 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:04:48,779 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:04:48,779 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:04:48,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:04:48,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:04:48,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:04:48,780 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:04:48,781 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-10-26 19:04:48,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:04:48,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:48,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:48,905 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:04:48,906 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-26 19:04:48,906 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:04:48,906 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 120 [2020-10-26 19:04:48,906 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:04:48,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-26 19:04:48,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:04:48,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-26 19:04:48,907 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:04:49,792 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2020-10-26 19:04:49,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:04:49,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:49,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:49,903 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:04:49,903 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-26 19:04:49,903 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:04:49,903 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 107 [2020-10-26 19:04:49,903 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:04:49,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-26 19:04:49,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:04:49,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-26 19:04:49,904 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:04:49,910 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 161 [2020-10-26 19:04:49,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:04:49,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:49,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:50,056 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:04:50,056 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-26 19:04:50,056 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:04:50,056 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 141 [2020-10-26 19:04:50,057 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:04:50,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-26 19:04:50,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:04:50,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-26 19:04:50,057 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:04:50,122 INFO L134 CoverageAnalysis]: Checked inductivity of 5443 backedges. 1587 proven. 3703 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2020-10-26 19:04:50,122 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2060030266] [2020-10-26 19:04:50,122 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:04:50,122 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51] total 51 [2020-10-26 19:04:50,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809114431] [2020-10-26 19:04:50,123 INFO L461 AbstractCegarLoop]: Interpolant automaton has 51 states [2020-10-26 19:04:50,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:04:50,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2020-10-26 19:04:50,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=651, Invalid=1899, Unknown=0, NotChecked=0, Total=2550 [2020-10-26 19:04:50,124 INFO L87 Difference]: Start difference. First operand 118 states and 122 transitions. Second operand 51 states. [2020-10-26 19:04:52,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:04:52,248 INFO L93 Difference]: Finished difference Result 189 states and 201 transitions. [2020-10-26 19:04:52,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-10-26 19:04:52,249 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 218 [2020-10-26 19:04:52,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:04:52,250 INFO L225 Difference]: With dead ends: 189 [2020-10-26 19:04:52,250 INFO L226 Difference]: Without dead ends: 124 [2020-10-26 19:04:52,251 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 851 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1299, Invalid=4251, Unknown=0, NotChecked=0, Total=5550 [2020-10-26 19:04:52,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-10-26 19:04:52,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 122. [2020-10-26 19:04:52,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-10-26 19:04:52,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 126 transitions. [2020-10-26 19:04:52,258 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 126 transitions. Word has length 218 [2020-10-26 19:04:52,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:04:52,258 INFO L481 AbstractCegarLoop]: Abstraction has 122 states and 126 transitions. [2020-10-26 19:04:52,258 INFO L482 AbstractCegarLoop]: Interpolant automaton has 51 states. [2020-10-26 19:04:52,258 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 126 transitions. [2020-10-26 19:04:52,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2020-10-26 19:04:52,260 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:04:52,260 INFO L422 BasicCegarLoop]: trace histogram [72, 72, 24, 24, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:04:52,260 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-26 19:04:52,260 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:04:52,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:04:52,261 INFO L82 PathProgramCache]: Analyzing trace with hash -360144047, now seen corresponding path program 24 times [2020-10-26 19:04:52,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:04:52,261 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [372699325] [2020-10-26 19:04:52,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:04:52,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:04:52,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:52,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:52,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:52,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:57,287 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:04:57,288 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 240 [2020-10-26 19:04:57,288 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:04:57,288 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-26 19:04:57,288 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:04:57,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-26 19:04:57,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:04:57,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-26 19:04:57,288 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:04:57,819 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:04:57,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:04:57,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:57,823 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:04:57,823 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:04:57,823 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:04:57,823 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:04:57,823 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:04:57,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:04:57,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:04:57,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:04:57,824 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:04:57,825 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-10-26 19:04:57,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:04:57,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:57,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:57,947 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:04:57,947 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-26 19:04:57,947 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:04:57,947 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 118 [2020-10-26 19:04:57,947 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:04:57,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-26 19:04:57,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:04:57,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-26 19:04:57,948 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:04:58,886 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2020-10-26 19:04:58,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:04:58,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:58,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:59,013 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:04:59,014 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-26 19:04:59,014 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:04:59,014 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 124 [2020-10-26 19:04:59,014 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:04:59,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-26 19:04:59,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:04:59,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-26 19:04:59,014 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:04:59,022 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 167 [2020-10-26 19:04:59,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:04:59,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:59,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:59,147 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:04:59,147 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-26 19:04:59,147 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:04:59,147 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 122 [2020-10-26 19:04:59,147 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:04:59,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-26 19:04:59,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:04:59,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-26 19:04:59,147 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:04:59,208 INFO L134 CoverageAnalysis]: Checked inductivity of 5919 backedges. 1728 proven. 4032 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2020-10-26 19:04:59,208 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [372699325] [2020-10-26 19:04:59,208 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:04:59,209 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53] total 53 [2020-10-26 19:04:59,209 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834972213] [2020-10-26 19:04:59,209 INFO L461 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-10-26 19:04:59,209 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:04:59,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-10-26 19:04:59,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=2053, Unknown=0, NotChecked=0, Total=2756 [2020-10-26 19:04:59,210 INFO L87 Difference]: Start difference. First operand 122 states and 126 transitions. Second operand 53 states. [2020-10-26 19:05:01,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:05:01,245 INFO L93 Difference]: Finished difference Result 195 states and 207 transitions. [2020-10-26 19:05:01,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-10-26 19:05:01,245 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 226 [2020-10-26 19:05:01,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:05:01,247 INFO L225 Difference]: With dead ends: 195 [2020-10-26 19:05:01,247 INFO L226 Difference]: Without dead ends: 128 [2020-10-26 19:05:01,248 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 924 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=1403, Invalid=4603, Unknown=0, NotChecked=0, Total=6006 [2020-10-26 19:05:01,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-10-26 19:05:01,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 126. [2020-10-26 19:05:01,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-10-26 19:05:01,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 130 transitions. [2020-10-26 19:05:01,256 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 130 transitions. Word has length 226 [2020-10-26 19:05:01,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:05:01,256 INFO L481 AbstractCegarLoop]: Abstraction has 126 states and 130 transitions. [2020-10-26 19:05:01,256 INFO L482 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-10-26 19:05:01,256 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 130 transitions. [2020-10-26 19:05:01,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2020-10-26 19:05:01,258 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:05:01,258 INFO L422 BasicCegarLoop]: trace histogram [75, 75, 25, 25, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:05:01,258 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-26 19:05:01,258 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:05:01,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:05:01,259 INFO L82 PathProgramCache]: Analyzing trace with hash -1305583, now seen corresponding path program 25 times [2020-10-26 19:05:01,259 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:05:01,259 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1042402616] [2020-10-26 19:05:01,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:05:01,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:05:01,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:01,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:01,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:01,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:06,301 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:05:06,301 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 248 [2020-10-26 19:05:06,301 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:05:06,301 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5019 [2020-10-26 19:05:06,301 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:05:06,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-26 19:05:06,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:05:06,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-26 19:05:06,301 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:05:06,858 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:05:06,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:05:06,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:06,863 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:05:06,863 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:05:06,863 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:05:06,863 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:05:06,863 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:05:06,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:05:06,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:05:06,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:05:06,864 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:05:06,865 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-10-26 19:05:06,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:05:06,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:06,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:06,973 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:05:06,973 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-26 19:05:06,973 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:05:06,973 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 103 [2020-10-26 19:05:06,973 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:05:06,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-26 19:05:06,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:05:06,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-26 19:05:06,973 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:05:07,993 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2020-10-26 19:05:07,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:05:07,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:08,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:08,097 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:05:08,098 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-26 19:05:08,098 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:05:08,098 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 100 [2020-10-26 19:05:08,098 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:05:08,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-26 19:05:08,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:05:08,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-26 19:05:08,098 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:05:08,120 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 173 [2020-10-26 19:05:08,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:05:08,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:08,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:08,228 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:05:08,228 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-26 19:05:08,228 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:05:08,228 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 100 [2020-10-26 19:05:08,228 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:05:08,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-26 19:05:08,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:05:08,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-26 19:05:08,229 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:05:08,276 INFO L134 CoverageAnalysis]: Checked inductivity of 6415 backedges. 1875 proven. 4375 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2020-10-26 19:05:08,276 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1042402616] [2020-10-26 19:05:08,276 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:05:08,277 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55] total 55 [2020-10-26 19:05:08,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197081149] [2020-10-26 19:05:08,277 INFO L461 AbstractCegarLoop]: Interpolant automaton has 55 states [2020-10-26 19:05:08,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:05:08,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2020-10-26 19:05:08,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=757, Invalid=2213, Unknown=0, NotChecked=0, Total=2970 [2020-10-26 19:05:08,278 INFO L87 Difference]: Start difference. First operand 126 states and 130 transitions. Second operand 55 states. [2020-10-26 19:05:10,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:05:10,617 INFO L93 Difference]: Finished difference Result 201 states and 213 transitions. [2020-10-26 19:05:10,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-10-26 19:05:10,618 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 234 [2020-10-26 19:05:10,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:05:10,619 INFO L225 Difference]: With dead ends: 201 [2020-10-26 19:05:10,619 INFO L226 Difference]: Without dead ends: 132 [2020-10-26 19:05:10,621 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1000 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=1511, Invalid=4969, Unknown=0, NotChecked=0, Total=6480 [2020-10-26 19:05:10,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-10-26 19:05:10,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 130. [2020-10-26 19:05:10,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-10-26 19:05:10,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 134 transitions. [2020-10-26 19:05:10,629 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 134 transitions. Word has length 234 [2020-10-26 19:05:10,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:05:10,629 INFO L481 AbstractCegarLoop]: Abstraction has 130 states and 134 transitions. [2020-10-26 19:05:10,629 INFO L482 AbstractCegarLoop]: Interpolant automaton has 55 states. [2020-10-26 19:05:10,629 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 134 transitions. [2020-10-26 19:05:10,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2020-10-26 19:05:10,631 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:05:10,631 INFO L422 BasicCegarLoop]: trace histogram [78, 78, 26, 26, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:05:10,631 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-26 19:05:10,631 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:05:10,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:05:10,632 INFO L82 PathProgramCache]: Analyzing trace with hash -144756015, now seen corresponding path program 26 times [2020-10-26 19:05:10,632 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:05:10,632 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2119443925] [2020-10-26 19:05:10,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:05:10,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:05:10,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:10,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:10,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:10,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:15,679 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:05:15,679 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 256 [2020-10-26 19:05:15,679 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:05:15,679 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5021 [2020-10-26 19:05:15,679 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:05:15,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-26 19:05:15,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:05:15,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-26 19:05:15,680 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:05:16,274 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:05:16,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:05:16,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:16,279 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:05:16,279 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:05:16,280 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:05:16,280 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:05:16,280 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:05:16,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:05:16,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:05:16,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:05:16,280 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:05:16,282 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2020-10-26 19:05:16,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:05:16,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:16,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:16,410 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:05:16,410 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-26 19:05:16,410 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:05:16,410 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 123 [2020-10-26 19:05:16,410 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:05:16,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-26 19:05:16,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:05:16,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-26 19:05:16,411 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:05:17,517 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-10-26 19:05:17,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:05:17,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:17,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:17,693 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:05:17,693 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-26 19:05:17,693 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:05:17,693 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 171 [2020-10-26 19:05:17,693 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:05:17,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-26 19:05:17,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:05:17,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-26 19:05:17,694 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:05:17,707 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 179 [2020-10-26 19:05:17,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:05:17,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:17,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:17,911 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:05:17,911 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-26 19:05:17,911 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:05:17,912 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 198 [2020-10-26 19:05:17,912 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:05:17,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-26 19:05:17,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:05:17,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-26 19:05:17,912 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:05:17,992 INFO L134 CoverageAnalysis]: Checked inductivity of 6931 backedges. 2028 proven. 4732 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2020-10-26 19:05:17,993 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2119443925] [2020-10-26 19:05:17,993 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:05:17,993 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57] total 57 [2020-10-26 19:05:17,993 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508661877] [2020-10-26 19:05:17,994 INFO L461 AbstractCegarLoop]: Interpolant automaton has 57 states [2020-10-26 19:05:17,994 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:05:17,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2020-10-26 19:05:17,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=813, Invalid=2379, Unknown=0, NotChecked=0, Total=3192 [2020-10-26 19:05:17,995 INFO L87 Difference]: Start difference. First operand 130 states and 134 transitions. Second operand 57 states. [2020-10-26 19:05:20,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:05:20,492 INFO L93 Difference]: Finished difference Result 207 states and 219 transitions. [2020-10-26 19:05:20,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-10-26 19:05:20,493 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 242 [2020-10-26 19:05:20,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:05:20,494 INFO L225 Difference]: With dead ends: 207 [2020-10-26 19:05:20,495 INFO L226 Difference]: Without dead ends: 136 [2020-10-26 19:05:20,496 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1079 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=1623, Invalid=5349, Unknown=0, NotChecked=0, Total=6972 [2020-10-26 19:05:20,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-10-26 19:05:20,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 134. [2020-10-26 19:05:20,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-10-26 19:05:20,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 138 transitions. [2020-10-26 19:05:20,503 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 138 transitions. Word has length 242 [2020-10-26 19:05:20,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:05:20,503 INFO L481 AbstractCegarLoop]: Abstraction has 134 states and 138 transitions. [2020-10-26 19:05:20,503 INFO L482 AbstractCegarLoop]: Interpolant automaton has 57 states. [2020-10-26 19:05:20,503 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 138 transitions. [2020-10-26 19:05:20,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2020-10-26 19:05:20,505 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:05:20,505 INFO L422 BasicCegarLoop]: trace histogram [81, 81, 27, 27, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:05:20,505 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-26 19:05:20,505 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:05:20,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:05:20,505 INFO L82 PathProgramCache]: Analyzing trace with hash 1244200849, now seen corresponding path program 27 times [2020-10-26 19:05:20,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:05:20,505 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [873033825] [2020-10-26 19:05:20,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:05:20,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:05:20,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:20,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:20,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:20,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:25,552 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:05:25,552 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 264 [2020-10-26 19:05:25,553 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:05:25,553 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5028 [2020-10-26 19:05:25,553 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:05:25,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-26 19:05:25,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:05:25,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-26 19:05:25,553 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:05:26,202 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:05:26,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:05:26,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:26,207 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:05:26,207 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:05:26,207 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:05:26,207 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:05:26,207 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:05:26,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:05:26,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:05:26,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:05:26,207 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:05:26,209 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-10-26 19:05:26,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:05:26,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:26,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:26,326 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:05:26,327 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-26 19:05:26,327 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:05:26,327 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 115 [2020-10-26 19:05:26,327 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:05:26,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-26 19:05:26,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:05:26,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-26 19:05:26,327 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:05:27,534 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2020-10-26 19:05:27,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:05:27,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:27,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:27,653 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:05:27,654 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-26 19:05:27,654 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:05:27,654 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 115 [2020-10-26 19:05:27,654 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:05:27,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-26 19:05:27,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:05:27,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-26 19:05:27,654 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:05:27,664 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 185 [2020-10-26 19:05:27,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:05:27,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:27,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:27,789 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:05:27,790 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-26 19:05:27,790 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:05:27,790 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 122 [2020-10-26 19:05:27,790 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:05:27,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-26 19:05:27,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:05:27,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-26 19:05:27,790 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:05:27,859 INFO L134 CoverageAnalysis]: Checked inductivity of 7467 backedges. 2187 proven. 5103 refuted. 0 times theorem prover too weak. 177 trivial. 0 not checked. [2020-10-26 19:05:27,859 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [873033825] [2020-10-26 19:05:27,859 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:05:27,859 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59] total 59 [2020-10-26 19:05:27,860 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574640931] [2020-10-26 19:05:27,860 INFO L461 AbstractCegarLoop]: Interpolant automaton has 59 states [2020-10-26 19:05:27,860 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:05:27,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2020-10-26 19:05:27,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=871, Invalid=2551, Unknown=0, NotChecked=0, Total=3422 [2020-10-26 19:05:27,861 INFO L87 Difference]: Start difference. First operand 134 states and 138 transitions. Second operand 59 states. [2020-10-26 19:05:30,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:05:30,497 INFO L93 Difference]: Finished difference Result 213 states and 225 transitions. [2020-10-26 19:05:30,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2020-10-26 19:05:30,498 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 250 [2020-10-26 19:05:30,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:05:30,499 INFO L225 Difference]: With dead ends: 213 [2020-10-26 19:05:30,499 INFO L226 Difference]: Without dead ends: 140 [2020-10-26 19:05:30,502 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1161 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=1739, Invalid=5743, Unknown=0, NotChecked=0, Total=7482 [2020-10-26 19:05:30,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-10-26 19:05:30,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 138. [2020-10-26 19:05:30,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-10-26 19:05:30,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 142 transitions. [2020-10-26 19:05:30,509 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 142 transitions. Word has length 250 [2020-10-26 19:05:30,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:05:30,510 INFO L481 AbstractCegarLoop]: Abstraction has 138 states and 142 transitions. [2020-10-26 19:05:30,510 INFO L482 AbstractCegarLoop]: Interpolant automaton has 59 states. [2020-10-26 19:05:30,510 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 142 transitions. [2020-10-26 19:05:30,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2020-10-26 19:05:30,511 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:05:30,512 INFO L422 BasicCegarLoop]: trace histogram [84, 84, 28, 28, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:05:30,512 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-26 19:05:30,512 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:05:30,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:05:30,512 INFO L82 PathProgramCache]: Analyzing trace with hash 1890613841, now seen corresponding path program 28 times [2020-10-26 19:05:30,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:05:30,513 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2009510409] [2020-10-26 19:05:30,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:05:30,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:05:30,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:30,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:30,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:30,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:35,546 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:05:35,546 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 272 [2020-10-26 19:05:35,546 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:05:35,546 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-26 19:05:35,546 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:05:35,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-26 19:05:35,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:05:35,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-26 19:05:35,547 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:05:36,233 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:05:36,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:05:36,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:36,237 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:05:36,237 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:05:36,237 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:05:36,237 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:05:36,238 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:05:36,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:05:36,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:05:36,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:05:36,238 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:05:36,239 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-10-26 19:05:36,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:05:36,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:36,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:36,368 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:05:36,368 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-26 19:05:36,368 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:05:36,368 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 125 [2020-10-26 19:05:36,368 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:05:36,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-26 19:05:36,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:05:36,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-26 19:05:36,369 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:05:37,655 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2020-10-26 19:05:37,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:05:37,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:37,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:37,784 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:05:37,784 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-26 19:05:37,784 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:05:37,784 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 124 [2020-10-26 19:05:37,784 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:05:37,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-26 19:05:37,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:05:37,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-26 19:05:37,784 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:05:37,793 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 191 [2020-10-26 19:05:37,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:05:37,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:37,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:37,939 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:05:37,939 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-26 19:05:37,939 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:05:37,939 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 141 [2020-10-26 19:05:37,940 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:05:37,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-26 19:05:37,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:05:37,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-26 19:05:37,940 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:05:38,007 INFO L134 CoverageAnalysis]: Checked inductivity of 8023 backedges. 2352 proven. 5488 refuted. 0 times theorem prover too weak. 183 trivial. 0 not checked. [2020-10-26 19:05:38,007 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2009510409] [2020-10-26 19:05:38,007 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:05:38,008 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61] total 61 [2020-10-26 19:05:38,008 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454826251] [2020-10-26 19:05:38,008 INFO L461 AbstractCegarLoop]: Interpolant automaton has 61 states [2020-10-26 19:05:38,008 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:05:38,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2020-10-26 19:05:38,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=931, Invalid=2729, Unknown=0, NotChecked=0, Total=3660 [2020-10-26 19:05:38,009 INFO L87 Difference]: Start difference. First operand 138 states and 142 transitions. Second operand 61 states. [2020-10-26 19:05:40,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:05:40,641 INFO L93 Difference]: Finished difference Result 219 states and 231 transitions. [2020-10-26 19:05:40,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2020-10-26 19:05:40,642 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 258 [2020-10-26 19:05:40,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:05:40,643 INFO L225 Difference]: With dead ends: 219 [2020-10-26 19:05:40,643 INFO L226 Difference]: Without dead ends: 144 [2020-10-26 19:05:40,645 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1246 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=1859, Invalid=6151, Unknown=0, NotChecked=0, Total=8010 [2020-10-26 19:05:40,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-10-26 19:05:40,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 142. [2020-10-26 19:05:40,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-26 19:05:40,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 146 transitions. [2020-10-26 19:05:40,652 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 146 transitions. Word has length 258 [2020-10-26 19:05:40,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:05:40,652 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 146 transitions. [2020-10-26 19:05:40,653 INFO L482 AbstractCegarLoop]: Interpolant automaton has 61 states. [2020-10-26 19:05:40,653 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 146 transitions. [2020-10-26 19:05:40,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2020-10-26 19:05:40,654 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:05:40,654 INFO L422 BasicCegarLoop]: trace histogram [87, 87, 29, 29, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:05:40,654 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-26 19:05:40,655 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:05:40,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:05:40,655 INFO L82 PathProgramCache]: Analyzing trace with hash -763583727, now seen corresponding path program 29 times [2020-10-26 19:05:40,655 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:05:40,655 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [368214787] [2020-10-26 19:05:40,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:05:40,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:05:40,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:40,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:40,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:40,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:45,690 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:05:45,691 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 280 [2020-10-26 19:05:45,691 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:05:45,691 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-26 19:05:45,691 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:05:45,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-26 19:05:45,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:05:45,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-26 19:05:45,691 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:05:46,419 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:05:46,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:05:46,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:46,423 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:05:46,423 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:05:46,423 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:05:46,423 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:05:46,424 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:05:46,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:05:46,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:05:46,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:05:46,424 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:05:46,425 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-10-26 19:05:46,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:05:46,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:46,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:46,563 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:05:46,563 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-26 19:05:46,563 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:05:46,563 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 134 [2020-10-26 19:05:46,563 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:05:46,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-26 19:05:46,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:05:46,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-26 19:05:46,564 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:05:47,921 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2020-10-26 19:05:47,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:05:47,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:47,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:48,057 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:05:48,057 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-26 19:05:48,057 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:05:48,057 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 132 [2020-10-26 19:05:48,058 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:05:48,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-26 19:05:48,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:05:48,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-26 19:05:48,058 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:05:48,069 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 197 [2020-10-26 19:05:48,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:05:48,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:48,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:48,206 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:05:48,206 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-26 19:05:48,206 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:05:48,206 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 132 [2020-10-26 19:05:48,207 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:05:48,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-26 19:05:48,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:05:48,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-26 19:05:48,207 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:05:48,292 INFO L134 CoverageAnalysis]: Checked inductivity of 8599 backedges. 2523 proven. 5887 refuted. 0 times theorem prover too weak. 189 trivial. 0 not checked. [2020-10-26 19:05:48,292 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [368214787] [2020-10-26 19:05:48,292 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:05:48,292 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63] total 63 [2020-10-26 19:05:48,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852001301] [2020-10-26 19:05:48,293 INFO L461 AbstractCegarLoop]: Interpolant automaton has 63 states [2020-10-26 19:05:48,293 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:05:48,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2020-10-26 19:05:48,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=993, Invalid=2913, Unknown=0, NotChecked=0, Total=3906 [2020-10-26 19:05:48,294 INFO L87 Difference]: Start difference. First operand 142 states and 146 transitions. Second operand 63 states. [2020-10-26 19:05:51,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:05:51,245 INFO L93 Difference]: Finished difference Result 225 states and 237 transitions. [2020-10-26 19:05:51,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2020-10-26 19:05:51,247 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 266 [2020-10-26 19:05:51,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:05:51,248 INFO L225 Difference]: With dead ends: 225 [2020-10-26 19:05:51,248 INFO L226 Difference]: Without dead ends: 148 [2020-10-26 19:05:51,250 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1334 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=1983, Invalid=6573, Unknown=0, NotChecked=0, Total=8556 [2020-10-26 19:05:51,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-10-26 19:05:51,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 146. [2020-10-26 19:05:51,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-10-26 19:05:51,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 150 transitions. [2020-10-26 19:05:51,258 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 150 transitions. Word has length 266 [2020-10-26 19:05:51,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:05:51,258 INFO L481 AbstractCegarLoop]: Abstraction has 146 states and 150 transitions. [2020-10-26 19:05:51,258 INFO L482 AbstractCegarLoop]: Interpolant automaton has 63 states. [2020-10-26 19:05:51,258 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 150 transitions. [2020-10-26 19:05:51,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 275 [2020-10-26 19:05:51,260 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:05:51,260 INFO L422 BasicCegarLoop]: trace histogram [90, 90, 30, 30, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:05:51,260 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-26 19:05:51,260 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:05:51,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:05:51,261 INFO L82 PathProgramCache]: Analyzing trace with hash -1238074927, now seen corresponding path program 30 times [2020-10-26 19:05:51,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:05:51,261 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [443117037] [2020-10-26 19:05:51,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:05:51,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:05:51,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:51,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:51,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:51,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:56,294 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:05:56,294 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 288 [2020-10-26 19:05:56,294 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:05:56,294 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-26 19:05:56,295 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:05:56,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-26 19:05:56,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:05:56,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-26 19:05:56,295 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:05:57,070 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:05:57,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:05:57,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:57,074 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:05:57,074 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:05:57,074 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:05:57,074 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:05:57,074 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:05:57,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:05:57,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:05:57,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:05:57,074 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:05:57,076 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-10-26 19:05:57,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:05:57,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:57,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:57,225 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:05:57,225 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-26 19:05:57,226 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:05:57,226 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 146 [2020-10-26 19:05:57,226 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:05:57,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-26 19:05:57,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:05:57,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-26 19:05:57,226 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:05:58,708 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2020-10-26 19:05:58,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:05:58,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:58,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:58,855 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:05:58,856 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-26 19:05:58,856 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:05:58,856 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 142 [2020-10-26 19:05:58,856 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:05:58,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-26 19:05:58,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:05:58,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-26 19:05:58,856 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:05:58,868 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 203 [2020-10-26 19:05:58,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:05:58,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:58,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:59,034 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:05:59,035 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-26 19:05:59,035 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:05:59,035 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 161 [2020-10-26 19:05:59,035 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:05:59,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-26 19:05:59,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:05:59,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-26 19:05:59,035 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:05:59,096 INFO L134 CoverageAnalysis]: Checked inductivity of 9195 backedges. 2700 proven. 6300 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2020-10-26 19:05:59,096 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [443117037] [2020-10-26 19:05:59,097 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:05:59,097 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65] total 65 [2020-10-26 19:05:59,097 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896154085] [2020-10-26 19:05:59,097 INFO L461 AbstractCegarLoop]: Interpolant automaton has 65 states [2020-10-26 19:05:59,097 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:05:59,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2020-10-26 19:05:59,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1057, Invalid=3103, Unknown=0, NotChecked=0, Total=4160 [2020-10-26 19:05:59,098 INFO L87 Difference]: Start difference. First operand 146 states and 150 transitions. Second operand 65 states. [2020-10-26 19:06:02,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:06:02,175 INFO L93 Difference]: Finished difference Result 231 states and 243 transitions. [2020-10-26 19:06:02,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2020-10-26 19:06:02,176 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 274 [2020-10-26 19:06:02,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:06:02,178 INFO L225 Difference]: With dead ends: 231 [2020-10-26 19:06:02,178 INFO L226 Difference]: Without dead ends: 152 [2020-10-26 19:06:02,179 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1425 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=2111, Invalid=7009, Unknown=0, NotChecked=0, Total=9120 [2020-10-26 19:06:02,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-10-26 19:06:02,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 150. [2020-10-26 19:06:02,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-10-26 19:06:02,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 154 transitions. [2020-10-26 19:06:02,187 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 154 transitions. Word has length 274 [2020-10-26 19:06:02,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:06:02,188 INFO L481 AbstractCegarLoop]: Abstraction has 150 states and 154 transitions. [2020-10-26 19:06:02,188 INFO L482 AbstractCegarLoop]: Interpolant automaton has 65 states. [2020-10-26 19:06:02,188 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 154 transitions. [2020-10-26 19:06:02,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 283 [2020-10-26 19:06:02,189 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:06:02,190 INFO L422 BasicCegarLoop]: trace histogram [93, 93, 31, 31, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:06:02,190 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-26 19:06:02,190 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:06:02,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:06:02,190 INFO L82 PathProgramCache]: Analyzing trace with hash 832503441, now seen corresponding path program 31 times [2020-10-26 19:06:02,190 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:06:02,190 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [738747814] [2020-10-26 19:06:02,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:06:02,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:06:02,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:02,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:02,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:02,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking...