/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-examples/standard_maxInArray_ground.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-26 19:25:56,034 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-26 19:25:56,036 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-26 19:25:56,083 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-26 19:25:56,084 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-26 19:25:56,091 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-26 19:25:56,093 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-26 19:25:56,098 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-26 19:25:56,101 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-26 19:25:56,107 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-26 19:25:56,108 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-26 19:25:56,110 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-26 19:25:56,110 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-26 19:25:56,113 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-26 19:25:56,116 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-26 19:25:56,118 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-26 19:25:56,119 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-26 19:25:56,122 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-26 19:25:56,128 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-26 19:25:56,136 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-26 19:25:56,138 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-26 19:25:56,139 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-26 19:25:56,140 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-26 19:25:56,143 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-26 19:25:56,150 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-26 19:25:56,150 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-26 19:25:56,151 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-26 19:25:56,151 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-26 19:25:56,155 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-26 19:25:56,156 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-26 19:25:56,156 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-26 19:25:56,157 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-26 19:25:56,159 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-26 19:25:56,160 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-26 19:25:56,161 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-26 19:25:56,161 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-26 19:25:56,162 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-26 19:25:56,162 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-26 19:25:56,162 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-26 19:25:56,163 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-26 19:25:56,164 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-26 19:25:56,171 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 19:25:56,220 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-26 19:25:56,221 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-26 19:25:56,225 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-26 19:25:56,225 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-26 19:25:56,225 INFO L138 SettingsManager]: * Use SBE=true [2020-10-26 19:25:56,226 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-26 19:25:56,226 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-26 19:25:56,226 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-26 19:25:56,226 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-26 19:25:56,226 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-26 19:25:56,227 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-26 19:25:56,228 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-26 19:25:56,228 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-26 19:25:56,228 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-26 19:25:56,228 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-26 19:25:56,228 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-26 19:25:56,228 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-26 19:25:56,229 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-26 19:25:56,229 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-26 19:25:56,229 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-26 19:25:56,229 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-26 19:25:56,229 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 19:25:56,230 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-26 19:25:56,242 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-26 19:25:56,243 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-26 19:25:56,243 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-26 19:25:56,243 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-26 19:25:56,243 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-26 19:25:56,243 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-26 19:25:56,243 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-26 19:25:56,601 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-26 19:25:56,626 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-26 19:25:56,629 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-26 19:25:56,630 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-26 19:25:56,631 INFO L275 PluginConnector]: CDTParser initialized [2020-10-26 19:25:56,632 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_maxInArray_ground.i [2020-10-26 19:25:56,706 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a7eaa82df/b1cc7b57399d4ead9aa2015729f05b03/FLAG60a50331a [2020-10-26 19:25:57,306 INFO L306 CDTParser]: Found 1 translation units. [2020-10-26 19:25:57,309 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-examples/standard_maxInArray_ground.i [2020-10-26 19:25:57,321 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a7eaa82df/b1cc7b57399d4ead9aa2015729f05b03/FLAG60a50331a [2020-10-26 19:25:57,640 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a7eaa82df/b1cc7b57399d4ead9aa2015729f05b03 [2020-10-26 19:25:57,643 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-26 19:25:57,653 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-26 19:25:57,657 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-26 19:25:57,658 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-26 19:25:57,662 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-26 19:25:57,663 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 07:25:57" (1/1) ... [2020-10-26 19:25:57,668 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7eb7201e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:25:57, skipping insertion in model container [2020-10-26 19:25:57,668 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 07:25:57" (1/1) ... [2020-10-26 19:25:57,679 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-26 19:25:57,704 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-26 19:25:57,891 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 19:25:57,903 INFO L203 MainTranslator]: Completed pre-run [2020-10-26 19:25:57,933 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 19:25:57,955 INFO L208 MainTranslator]: Completed translation [2020-10-26 19:25:57,957 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:25:57 WrapperNode [2020-10-26 19:25:57,957 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-26 19:25:57,958 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-26 19:25:57,958 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-26 19:25:57,959 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-26 19:25:57,973 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:25:57" (1/1) ... [2020-10-26 19:25:57,975 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:25:57" (1/1) ... [2020-10-26 19:25:57,986 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:25:57" (1/1) ... [2020-10-26 19:25:57,987 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:25:57" (1/1) ... [2020-10-26 19:25:58,007 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:25:57" (1/1) ... [2020-10-26 19:25:58,014 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:25:57" (1/1) ... [2020-10-26 19:25:58,021 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:25:57" (1/1) ... [2020-10-26 19:25:58,026 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-26 19:25:58,028 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-26 19:25:58,029 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-26 19:25:58,029 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-26 19:25:58,030 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:25:57" (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 19:25:58,120 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-26 19:25:58,121 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-26 19:25:58,122 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-26 19:25:58,122 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-26 19:25:58,122 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-26 19:25:58,122 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-26 19:25:58,123 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-26 19:25:58,123 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-26 19:25:58,123 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-26 19:25:58,123 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-26 19:25:58,124 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-26 19:25:58,124 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-26 19:25:58,125 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-26 19:25:58,125 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-26 19:25:58,125 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-26 19:25:58,126 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-26 19:25:58,126 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-26 19:25:58,127 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-26 19:25:58,127 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-26 19:25:58,127 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-26 19:25:58,395 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-26 19:25:58,396 INFO L298 CfgBuilder]: Removed 3 assume(true) statements. [2020-10-26 19:25:58,397 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 07:25:58 BoogieIcfgContainer [2020-10-26 19:25:58,398 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-26 19:25:58,424 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-26 19:25:58,424 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-26 19:25:58,429 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-26 19:25:58,429 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 07:25:57" (1/3) ... [2020-10-26 19:25:58,430 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b03b4b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 07:25:58, skipping insertion in model container [2020-10-26 19:25:58,430 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:25:57" (2/3) ... [2020-10-26 19:25:58,431 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b03b4b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 07:25:58, skipping insertion in model container [2020-10-26 19:25:58,431 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 07:25:58" (3/3) ... [2020-10-26 19:25:58,433 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_maxInArray_ground.i [2020-10-26 19:25:58,444 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-26 19:25:58,449 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-26 19:25:58,466 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-26 19:25:58,538 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-26 19:25:58,538 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-26 19:25:58,538 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-26 19:25:58,538 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-26 19:25:58,539 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-26 19:25:58,539 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-26 19:25:58,539 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-26 19:25:58,547 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-26 19:25:58,584 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-10-26 19:25:58,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-26 19:25:58,596 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:25:58,597 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:25:58,598 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:25:58,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:25:58,605 INFO L82 PathProgramCache]: Analyzing trace with hash -368075238, now seen corresponding path program 1 times [2020-10-26 19:25:58,614 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:25:58,615 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [7854456] [2020-10-26 19:25:58,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:25:58,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:25:58,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:58,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:58,916 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:25:58,917 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-26 19:25:58,917 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:25:58,917 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 169 [2020-10-26 19:25:58,919 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:25:58,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:25:58,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:25:58,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:25:58,920 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-26 19:25:58,989 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:25:58,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:25:58,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:59,007 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:25:59,008 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:25:59,008 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:25:59,008 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-26 19:25:59,008 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:25:59,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:25:59,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:25:59,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:25:59,009 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:25:59,021 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:25:59,022 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [7854456] [2020-10-26 19:25:59,023 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 19:25:59,024 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-26 19:25:59,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495945881] [2020-10-26 19:25:59,029 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-26 19:25:59,029 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:25:59,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-26 19:25:59,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-26 19:25:59,046 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 3 states. [2020-10-26 19:25:59,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:25:59,150 INFO L93 Difference]: Finished difference Result 55 states and 71 transitions. [2020-10-26 19:25:59,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-26 19:25:59,152 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-10-26 19:25:59,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:25:59,159 INFO L225 Difference]: With dead ends: 55 [2020-10-26 19:25:59,160 INFO L226 Difference]: Without dead ends: 25 [2020-10-26 19:25:59,163 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-26 19:25:59,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-10-26 19:25:59,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-10-26 19:25:59,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-26 19:25:59,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2020-10-26 19:25:59,204 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 17 [2020-10-26 19:25:59,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:25:59,205 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2020-10-26 19:25:59,205 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-26 19:25:59,205 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2020-10-26 19:25:59,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-26 19:25:59,206 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:25:59,206 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:25:59,206 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-26 19:25:59,207 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:25:59,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:25:59,208 INFO L82 PathProgramCache]: Analyzing trace with hash 230860937, now seen corresponding path program 1 times [2020-10-26 19:25:59,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:25:59,208 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1752031465] [2020-10-26 19:25:59,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:25:59,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:25:59,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:59,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:59,451 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:25:59,451 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-26 19:25:59,451 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:25:59,452 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 225 [2020-10-26 19:25:59,452 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:25:59,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:25:59,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:25:59,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 19:25:59,453 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:25:59,506 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:25:59,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:25:59,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:59,519 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:25:59,520 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:25:59,520 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:25:59,520 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-26 19:25:59,520 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:25:59,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:25:59,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:25:59,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:25:59,521 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:25:59,526 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:25:59,526 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1752031465] [2020-10-26 19:25:59,527 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 19:25:59,527 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-26 19:25:59,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856755657] [2020-10-26 19:25:59,529 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-26 19:25:59,529 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:25:59,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-26 19:25:59,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 19:25:59,530 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand 4 states. [2020-10-26 19:25:59,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:25:59,607 INFO L93 Difference]: Finished difference Result 44 states and 50 transitions. [2020-10-26 19:25:59,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-26 19:25:59,607 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2020-10-26 19:25:59,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:25:59,608 INFO L225 Difference]: With dead ends: 44 [2020-10-26 19:25:59,609 INFO L226 Difference]: Without dead ends: 27 [2020-10-26 19:25:59,610 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 19:25:59,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-26 19:25:59,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2020-10-26 19:25:59,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-26 19:25:59,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2020-10-26 19:25:59,617 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 17 [2020-10-26 19:25:59,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:25:59,618 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2020-10-26 19:25:59,618 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-26 19:25:59,618 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2020-10-26 19:25:59,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-26 19:25:59,620 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:25:59,621 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:25:59,621 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-26 19:25:59,621 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:25:59,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:25:59,622 INFO L82 PathProgramCache]: Analyzing trace with hash -1800786073, now seen corresponding path program 1 times [2020-10-26 19:25:59,622 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:25:59,622 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1204728117] [2020-10-26 19:25:59,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:25:59,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:25:59,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:59,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:59,790 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:25:59,791 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-26 19:25:59,791 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:25:59,791 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 146 [2020-10-26 19:25:59,791 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:25:59,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-26 19:25:59,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:25:59,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-26 19:25:59,792 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:25:59,834 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:25:59,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:25:59,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:59,843 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:25:59,843 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:25:59,843 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:25:59,843 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 19:25:59,843 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:25:59,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:25:59,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:25:59,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:25:59,844 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:25:59,849 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:25:59,849 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1204728117] [2020-10-26 19:25:59,849 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:25:59,849 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-26 19:25:59,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343347669] [2020-10-26 19:25:59,850 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-26 19:25:59,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:25:59,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-26 19:25:59,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-26 19:25:59,852 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand 5 states. [2020-10-26 19:25:59,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:25:59,935 INFO L93 Difference]: Finished difference Result 46 states and 52 transitions. [2020-10-26 19:25:59,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 19:25:59,936 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2020-10-26 19:25:59,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:25:59,937 INFO L225 Difference]: With dead ends: 46 [2020-10-26 19:25:59,937 INFO L226 Difference]: Without dead ends: 29 [2020-10-26 19:25:59,938 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-26 19:25:59,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-26 19:25:59,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2020-10-26 19:25:59,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-26 19:25:59,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2020-10-26 19:25:59,946 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 19 [2020-10-26 19:25:59,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:25:59,946 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2020-10-26 19:25:59,946 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-26 19:25:59,946 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2020-10-26 19:25:59,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-26 19:25:59,947 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:25:59,947 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:25:59,948 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-26 19:25:59,948 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:25:59,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:25:59,949 INFO L82 PathProgramCache]: Analyzing trace with hash -3443003, now seen corresponding path program 2 times [2020-10-26 19:25:59,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:25:59,949 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1376805007] [2020-10-26 19:25:59,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:25:59,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:25:59,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:59,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:00,231 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:00,231 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-26 19:26:00,232 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:26:00,232 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 269 [2020-10-26 19:26:00,232 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:00,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 19:26:00,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:26:00,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:26:00,233 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:26:00,283 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:26:00,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:00,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:00,292 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:00,293 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:26:00,293 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:26:00,293 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-26 19:26:00,293 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:00,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:26:00,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:26:00,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:26:00,294 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:00,298 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:26:00,298 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1376805007] [2020-10-26 19:26:00,298 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:26:00,298 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-26 19:26:00,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912531314] [2020-10-26 19:26:00,299 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-26 19:26:00,299 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:26:00,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-26 19:26:00,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-26 19:26:00,301 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand 6 states. [2020-10-26 19:26:00,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:26:00,388 INFO L93 Difference]: Finished difference Result 48 states and 54 transitions. [2020-10-26 19:26:00,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-26 19:26:00,389 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 21 [2020-10-26 19:26:00,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:26:00,390 INFO L225 Difference]: With dead ends: 48 [2020-10-26 19:26:00,390 INFO L226 Difference]: Without dead ends: 31 [2020-10-26 19:26:00,391 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-26 19:26:00,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-26 19:26:00,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2020-10-26 19:26:00,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-26 19:26:00,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2020-10-26 19:26:00,398 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 21 [2020-10-26 19:26:00,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:26:00,399 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2020-10-26 19:26:00,399 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-26 19:26:00,399 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2020-10-26 19:26:00,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-26 19:26:00,400 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:26:00,400 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:26:00,400 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-26 19:26:00,400 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:26:00,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:26:00,401 INFO L82 PathProgramCache]: Analyzing trace with hash 666394275, now seen corresponding path program 3 times [2020-10-26 19:26:00,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:26:00,402 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1852528048] [2020-10-26 19:26:00,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:26:00,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:00,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:00,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:00,671 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:00,671 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-26 19:26:00,671 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:26:00,672 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 257 [2020-10-26 19:26:00,672 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:00,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 19:26:00,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:26:00,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-26 19:26:00,672 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:00,741 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:26:00,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:00,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:00,749 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:00,749 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:26:00,750 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:26:00,750 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:26:00,750 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:00,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:26:00,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:26:00,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:26:00,751 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:00,754 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:26:00,755 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1852528048] [2020-10-26 19:26:00,755 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:26:00,755 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 19:26:00,756 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392256557] [2020-10-26 19:26:00,756 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 19:26:00,756 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:26:00,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 19:26:00,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-26 19:26:00,757 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand 7 states. [2020-10-26 19:26:00,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:26:00,893 INFO L93 Difference]: Finished difference Result 50 states and 56 transitions. [2020-10-26 19:26:00,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-26 19:26:00,893 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 23 [2020-10-26 19:26:00,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:26:00,894 INFO L225 Difference]: With dead ends: 50 [2020-10-26 19:26:00,894 INFO L226 Difference]: Without dead ends: 33 [2020-10-26 19:26:00,895 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-26 19:26:00,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-10-26 19:26:00,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2020-10-26 19:26:00,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-26 19:26:00,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2020-10-26 19:26:00,909 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 23 [2020-10-26 19:26:00,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:26:00,910 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2020-10-26 19:26:00,911 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 19:26:00,911 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2020-10-26 19:26:00,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-26 19:26:00,912 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:26:00,912 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:26:00,912 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-26 19:26:00,912 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:26:00,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:26:00,913 INFO L82 PathProgramCache]: Analyzing trace with hash 134924033, now seen corresponding path program 4 times [2020-10-26 19:26:00,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:26:00,914 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1289809030] [2020-10-26 19:26:00,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:26:00,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:00,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:00,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:01,238 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:01,239 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-26 19:26:01,239 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:26:01,239 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 305 [2020-10-26 19:26:01,239 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:01,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 19:26:01,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:26:01,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-26 19:26:01,240 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:01,314 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:26:01,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:01,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:01,322 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:01,322 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:26:01,322 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:26:01,322 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:26:01,322 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:01,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:26:01,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:26:01,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:26:01,323 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:01,326 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:26:01,327 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1289809030] [2020-10-26 19:26:01,327 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:26:01,327 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-26 19:26:01,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544530466] [2020-10-26 19:26:01,328 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 19:26:01,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:26:01,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 19:26:01,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-26 19:26:01,329 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand 8 states. [2020-10-26 19:26:01,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:26:01,430 INFO L93 Difference]: Finished difference Result 52 states and 58 transitions. [2020-10-26 19:26:01,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-26 19:26:01,431 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 25 [2020-10-26 19:26:01,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:26:01,432 INFO L225 Difference]: With dead ends: 52 [2020-10-26 19:26:01,432 INFO L226 Difference]: Without dead ends: 35 [2020-10-26 19:26:01,433 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-26 19:26:01,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-10-26 19:26:01,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2020-10-26 19:26:01,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-26 19:26:01,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 37 transitions. [2020-10-26 19:26:01,439 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 37 transitions. Word has length 25 [2020-10-26 19:26:01,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:26:01,439 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 37 transitions. [2020-10-26 19:26:01,440 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 19:26:01,440 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 37 transitions. [2020-10-26 19:26:01,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-26 19:26:01,440 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:26:01,441 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:26:01,441 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-26 19:26:01,441 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:26:01,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:26:01,442 INFO L82 PathProgramCache]: Analyzing trace with hash 493129695, now seen corresponding path program 5 times [2020-10-26 19:26:01,442 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:26:01,442 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1093600728] [2020-10-26 19:26:01,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:26:01,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:01,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:01,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:01,758 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:01,758 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-26 19:26:01,758 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:26:01,758 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 304 [2020-10-26 19:26:01,759 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:01,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-26 19:26:01,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:26:01,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-26 19:26:01,759 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:01,841 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:26:01,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:01,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:01,847 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:01,848 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:26:01,848 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:26:01,848 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:26:01,848 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:01,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:26:01,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:26:01,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:26:01,849 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:01,852 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:26:01,853 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1093600728] [2020-10-26 19:26:01,853 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:26:01,853 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-26 19:26:01,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027990590] [2020-10-26 19:26:01,854 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-26 19:26:01,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:26:01,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-26 19:26:01,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-26 19:26:01,855 INFO L87 Difference]: Start difference. First operand 34 states and 37 transitions. Second operand 9 states. [2020-10-26 19:26:01,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:26:01,963 INFO L93 Difference]: Finished difference Result 54 states and 60 transitions. [2020-10-26 19:26:01,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-26 19:26:01,964 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 27 [2020-10-26 19:26:01,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:26:01,965 INFO L225 Difference]: With dead ends: 54 [2020-10-26 19:26:01,965 INFO L226 Difference]: Without dead ends: 37 [2020-10-26 19:26:01,966 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-26 19:26:01,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-26 19:26:01,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2020-10-26 19:26:01,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-26 19:26:01,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 39 transitions. [2020-10-26 19:26:01,972 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 39 transitions. Word has length 27 [2020-10-26 19:26:01,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:26:01,972 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 39 transitions. [2020-10-26 19:26:01,972 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-26 19:26:01,972 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 39 transitions. [2020-10-26 19:26:01,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-26 19:26:01,973 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:26:01,973 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:26:01,973 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-26 19:26:01,974 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:26:01,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:26:01,974 INFO L82 PathProgramCache]: Analyzing trace with hash 1131387197, now seen corresponding path program 6 times [2020-10-26 19:26:01,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:26:01,975 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [865705236] [2020-10-26 19:26:01,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:26:01,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:01,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:02,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:02,368 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:02,368 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-26 19:26:02,368 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:26:02,368 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 382 [2020-10-26 19:26:02,369 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:02,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 19:26:02,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:26:02,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-26 19:26:02,369 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:02,462 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:26:02,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:02,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:02,468 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:02,468 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:26:02,468 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:26:02,468 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:26:02,468 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:02,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:26:02,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:26:02,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:26:02,469 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:02,472 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:26:02,473 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [865705236] [2020-10-26 19:26:02,473 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:26:02,473 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-26 19:26:02,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284535999] [2020-10-26 19:26:02,474 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-26 19:26:02,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:26:02,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-26 19:26:02,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-26 19:26:02,475 INFO L87 Difference]: Start difference. First operand 36 states and 39 transitions. Second operand 10 states. [2020-10-26 19:26:02,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:26:02,593 INFO L93 Difference]: Finished difference Result 56 states and 62 transitions. [2020-10-26 19:26:02,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 19:26:02,594 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 29 [2020-10-26 19:26:02,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:26:02,594 INFO L225 Difference]: With dead ends: 56 [2020-10-26 19:26:02,595 INFO L226 Difference]: Without dead ends: 39 [2020-10-26 19:26:02,595 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-26 19:26:02,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-26 19:26:02,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2020-10-26 19:26:02,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-26 19:26:02,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 41 transitions. [2020-10-26 19:26:02,601 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 41 transitions. Word has length 29 [2020-10-26 19:26:02,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:26:02,601 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 41 transitions. [2020-10-26 19:26:02,602 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-26 19:26:02,602 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 41 transitions. [2020-10-26 19:26:02,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-26 19:26:02,603 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:26:02,603 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:26:02,603 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-26 19:26:02,603 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:26:02,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:26:02,604 INFO L82 PathProgramCache]: Analyzing trace with hash 316523291, now seen corresponding path program 7 times [2020-10-26 19:26:02,604 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:26:02,604 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [47344334] [2020-10-26 19:26:02,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:26:02,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:02,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:02,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:03,013 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:03,013 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-26 19:26:03,014 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:26:03,014 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 398 [2020-10-26 19:26:03,014 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:03,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-26 19:26:03,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:26:03,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-26 19:26:03,014 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:03,118 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:26:03,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:03,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:03,125 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:03,125 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:26:03,125 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:26:03,126 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:26:03,126 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:03,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:26:03,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:26:03,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:26:03,126 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:03,130 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:26:03,130 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [47344334] [2020-10-26 19:26:03,130 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:26:03,131 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-26 19:26:03,131 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824553489] [2020-10-26 19:26:03,131 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-26 19:26:03,132 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:26:03,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-26 19:26:03,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-26 19:26:03,133 INFO L87 Difference]: Start difference. First operand 38 states and 41 transitions. Second operand 11 states. [2020-10-26 19:26:03,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:26:03,246 INFO L93 Difference]: Finished difference Result 58 states and 64 transitions. [2020-10-26 19:26:03,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 19:26:03,247 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 31 [2020-10-26 19:26:03,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:26:03,248 INFO L225 Difference]: With dead ends: 58 [2020-10-26 19:26:03,248 INFO L226 Difference]: Without dead ends: 41 [2020-10-26 19:26:03,248 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-26 19:26:03,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-26 19:26:03,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 40. [2020-10-26 19:26:03,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-26 19:26:03,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 43 transitions. [2020-10-26 19:26:03,254 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 43 transitions. Word has length 31 [2020-10-26 19:26:03,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:26:03,255 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 43 transitions. [2020-10-26 19:26:03,255 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-26 19:26:03,255 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 43 transitions. [2020-10-26 19:26:03,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-26 19:26:03,256 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:26:03,256 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:26:03,256 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-26 19:26:03,257 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:26:03,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:26:03,257 INFO L82 PathProgramCache]: Analyzing trace with hash -1083642503, now seen corresponding path program 8 times [2020-10-26 19:26:03,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:26:03,258 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [389970076] [2020-10-26 19:26:03,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:26:03,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:03,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:03,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:03,915 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:03,916 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-26 19:26:03,916 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:26:03,916 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 646 [2020-10-26 19:26:03,916 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:03,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-26 19:26:03,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:26:03,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-26 19:26:03,917 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:04,055 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:26:04,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:04,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:04,060 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:04,061 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:26:04,061 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:26:04,061 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:26:04,061 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:04,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:26:04,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:26:04,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:26:04,062 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:26:04,078 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:26:04,079 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [389970076] [2020-10-26 19:26:04,085 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:26:04,085 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-26 19:26:04,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020135564] [2020-10-26 19:26:04,086 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-26 19:26:04,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:26:04,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-26 19:26:04,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-26 19:26:04,087 INFO L87 Difference]: Start difference. First operand 40 states and 43 transitions. Second operand 12 states. [2020-10-26 19:26:04,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:26:04,226 INFO L93 Difference]: Finished difference Result 60 states and 66 transitions. [2020-10-26 19:26:04,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-26 19:26:04,227 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 33 [2020-10-26 19:26:04,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:26:04,228 INFO L225 Difference]: With dead ends: 60 [2020-10-26 19:26:04,228 INFO L226 Difference]: Without dead ends: 43 [2020-10-26 19:26:04,228 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-26 19:26:04,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-26 19:26:04,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2020-10-26 19:26:04,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-26 19:26:04,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 45 transitions. [2020-10-26 19:26:04,239 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 45 transitions. Word has length 33 [2020-10-26 19:26:04,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:26:04,240 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 45 transitions. [2020-10-26 19:26:04,240 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-26 19:26:04,240 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 45 transitions. [2020-10-26 19:26:04,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-26 19:26:04,243 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:26:04,244 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:26:04,244 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-26 19:26:04,244 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:26:04,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:26:04,245 INFO L82 PathProgramCache]: Analyzing trace with hash 1976760407, now seen corresponding path program 9 times [2020-10-26 19:26:04,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:26:04,245 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1523171376] [2020-10-26 19:26:04,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:26:04,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:04,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:04,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:04,956 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:04,956 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-26 19:26:04,957 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:26:04,957 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 692 [2020-10-26 19:26:04,957 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:04,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-26 19:26:04,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:26:04,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-26 19:26:04,958 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:05,107 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:26:05,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:05,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:05,112 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:05,112 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:26:05,112 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:26:05,113 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:26:05,113 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:05,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:26:05,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:26:05,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:26:05,114 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:05,125 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:26:05,126 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1523171376] [2020-10-26 19:26:05,127 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:26:05,127 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-26 19:26:05,127 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952626831] [2020-10-26 19:26:05,128 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-26 19:26:05,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:26:05,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-26 19:26:05,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-26 19:26:05,130 INFO L87 Difference]: Start difference. First operand 42 states and 45 transitions. Second operand 13 states. [2020-10-26 19:26:05,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:26:05,245 INFO L93 Difference]: Finished difference Result 62 states and 68 transitions. [2020-10-26 19:26:05,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-26 19:26:05,245 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 35 [2020-10-26 19:26:05,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:26:05,246 INFO L225 Difference]: With dead ends: 62 [2020-10-26 19:26:05,246 INFO L226 Difference]: Without dead ends: 45 [2020-10-26 19:26:05,247 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-26 19:26:05,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-10-26 19:26:05,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2020-10-26 19:26:05,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-26 19:26:05,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 47 transitions. [2020-10-26 19:26:05,255 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 47 transitions. Word has length 35 [2020-10-26 19:26:05,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:26:05,257 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 47 transitions. [2020-10-26 19:26:05,257 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-26 19:26:05,257 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 47 transitions. [2020-10-26 19:26:05,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-26 19:26:05,260 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:26:05,260 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:26:05,261 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-26 19:26:05,261 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:26:05,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:26:05,261 INFO L82 PathProgramCache]: Analyzing trace with hash 971359157, now seen corresponding path program 10 times [2020-10-26 19:26:05,262 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:26:05,262 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1390319548] [2020-10-26 19:26:05,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:26:05,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:05,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:05,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:06,042 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:06,043 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-26 19:26:06,043 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:26:06,043 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 763 [2020-10-26 19:26:06,043 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:06,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-26 19:26:06,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:26:06,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-26 19:26:06,044 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:06,228 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:26:06,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:06,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:06,234 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:06,235 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:26:06,235 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:26:06,235 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:26:06,235 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:06,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:26:06,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:26:06,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:26:06,236 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:06,242 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:26:06,243 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1390319548] [2020-10-26 19:26:06,243 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:26:06,243 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-26 19:26:06,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510061653] [2020-10-26 19:26:06,244 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-26 19:26:06,244 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:26:06,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-26 19:26:06,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-26 19:26:06,245 INFO L87 Difference]: Start difference. First operand 44 states and 47 transitions. Second operand 14 states. [2020-10-26 19:26:06,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:26:06,402 INFO L93 Difference]: Finished difference Result 64 states and 70 transitions. [2020-10-26 19:26:06,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-26 19:26:06,403 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 37 [2020-10-26 19:26:06,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:26:06,404 INFO L225 Difference]: With dead ends: 64 [2020-10-26 19:26:06,404 INFO L226 Difference]: Without dead ends: 47 [2020-10-26 19:26:06,405 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-26 19:26:06,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-26 19:26:06,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2020-10-26 19:26:06,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-26 19:26:06,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 49 transitions. [2020-10-26 19:26:06,415 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 49 transitions. Word has length 37 [2020-10-26 19:26:06,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:26:06,416 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 49 transitions. [2020-10-26 19:26:06,416 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-26 19:26:06,416 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 49 transitions. [2020-10-26 19:26:06,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-26 19:26:06,417 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:26:06,417 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:26:06,417 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-26 19:26:06,417 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:26:06,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:26:06,418 INFO L82 PathProgramCache]: Analyzing trace with hash 1148399507, now seen corresponding path program 11 times [2020-10-26 19:26:06,418 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:26:06,418 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [551046871] [2020-10-26 19:26:06,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:26:06,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:06,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:06,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:07,313 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:07,313 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-26 19:26:07,314 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:26:07,315 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 877 [2020-10-26 19:26:07,315 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:07,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-26 19:26:07,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:26:07,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-26 19:26:07,315 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:07,500 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:26:07,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:07,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:07,507 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:07,507 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:26:07,507 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:26:07,507 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 19:26:07,507 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:07,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:26:07,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:26:07,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:26:07,508 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:07,514 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:26:07,514 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [551046871] [2020-10-26 19:26:07,514 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:26:07,515 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-26 19:26:07,515 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989886780] [2020-10-26 19:26:07,515 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-26 19:26:07,515 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:26:07,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-26 19:26:07,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-26 19:26:07,517 INFO L87 Difference]: Start difference. First operand 46 states and 49 transitions. Second operand 15 states. [2020-10-26 19:26:07,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:26:07,610 INFO L93 Difference]: Finished difference Result 66 states and 72 transitions. [2020-10-26 19:26:07,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-26 19:26:07,611 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 39 [2020-10-26 19:26:07,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:26:07,611 INFO L225 Difference]: With dead ends: 66 [2020-10-26 19:26:07,612 INFO L226 Difference]: Without dead ends: 49 [2020-10-26 19:26:07,614 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-26 19:26:07,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-26 19:26:07,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2020-10-26 19:26:07,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-26 19:26:07,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 51 transitions. [2020-10-26 19:26:07,620 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 51 transitions. Word has length 39 [2020-10-26 19:26:07,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:26:07,623 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 51 transitions. [2020-10-26 19:26:07,623 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-26 19:26:07,623 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 51 transitions. [2020-10-26 19:26:07,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-26 19:26:07,625 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:26:07,625 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:26:07,625 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-26 19:26:07,625 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:26:07,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:26:07,626 INFO L82 PathProgramCache]: Analyzing trace with hash -514515983, now seen corresponding path program 12 times [2020-10-26 19:26:07,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:26:07,626 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1164877375] [2020-10-26 19:26:07,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:26:07,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:07,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:07,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:08,612 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:08,613 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-26 19:26:08,613 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:26:08,613 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 955 [2020-10-26 19:26:08,613 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:08,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-26 19:26:08,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:26:08,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-26 19:26:08,614 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:08,840 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:26:08,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:08,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:08,846 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:08,847 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:26:08,847 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:26:08,847 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:26:08,847 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:08,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:26:08,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:26:08,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:26:08,848 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:08,854 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:26:08,855 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1164877375] [2020-10-26 19:26:08,855 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:26:08,855 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-26 19:26:08,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590775561] [2020-10-26 19:26:08,857 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-26 19:26:08,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:26:08,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-26 19:26:08,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-26 19:26:08,858 INFO L87 Difference]: Start difference. First operand 48 states and 51 transitions. Second operand 16 states. [2020-10-26 19:26:09,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:26:09,026 INFO L93 Difference]: Finished difference Result 68 states and 74 transitions. [2020-10-26 19:26:09,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-26 19:26:09,026 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 41 [2020-10-26 19:26:09,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:26:09,027 INFO L225 Difference]: With dead ends: 68 [2020-10-26 19:26:09,027 INFO L226 Difference]: Without dead ends: 51 [2020-10-26 19:26:09,029 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-26 19:26:09,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-26 19:26:09,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2020-10-26 19:26:09,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-26 19:26:09,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 53 transitions. [2020-10-26 19:26:09,038 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 53 transitions. Word has length 41 [2020-10-26 19:26:09,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:26:09,042 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 53 transitions. [2020-10-26 19:26:09,042 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-26 19:26:09,042 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 53 transitions. [2020-10-26 19:26:09,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-26 19:26:09,043 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:26:09,043 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:26:09,043 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-26 19:26:09,043 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:26:09,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:26:09,044 INFO L82 PathProgramCache]: Analyzing trace with hash -848467761, now seen corresponding path program 13 times [2020-10-26 19:26:09,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:26:09,045 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2025850855] [2020-10-26 19:26:09,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:26:09,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:09,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:09,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:10,103 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:10,103 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-26 19:26:10,103 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:26:10,103 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1041 [2020-10-26 19:26:10,103 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:10,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-26 19:26:10,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:26:10,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-26 19:26:10,104 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:10,313 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:26:10,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:10,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:10,319 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:10,320 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:26:10,320 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:26:10,320 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:26:10,320 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:10,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:26:10,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:26:10,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:26:10,321 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:10,326 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:26:10,326 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2025850855] [2020-10-26 19:26:10,326 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:26:10,326 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-26 19:26:10,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529543792] [2020-10-26 19:26:10,328 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-26 19:26:10,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:26:10,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-26 19:26:10,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-26 19:26:10,329 INFO L87 Difference]: Start difference. First operand 50 states and 53 transitions. Second operand 17 states. [2020-10-26 19:26:10,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:26:10,498 INFO L93 Difference]: Finished difference Result 70 states and 76 transitions. [2020-10-26 19:26:10,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-26 19:26:10,498 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 43 [2020-10-26 19:26:10,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:26:10,499 INFO L225 Difference]: With dead ends: 70 [2020-10-26 19:26:10,499 INFO L226 Difference]: Without dead ends: 53 [2020-10-26 19:26:10,500 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-26 19:26:10,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-26 19:26:10,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 52. [2020-10-26 19:26:10,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-26 19:26:10,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 55 transitions. [2020-10-26 19:26:10,508 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 55 transitions. Word has length 43 [2020-10-26 19:26:10,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:26:10,508 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 55 transitions. [2020-10-26 19:26:10,508 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-26 19:26:10,508 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 55 transitions. [2020-10-26 19:26:10,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-26 19:26:10,509 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:26:10,509 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:26:10,509 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-26 19:26:10,509 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:26:10,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:26:10,515 INFO L82 PathProgramCache]: Analyzing trace with hash 346420781, now seen corresponding path program 14 times [2020-10-26 19:26:10,515 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:26:10,516 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [553490840] [2020-10-26 19:26:10,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:26:10,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:10,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:10,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:11,659 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:11,659 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-26 19:26:11,660 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:26:11,660 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1128 [2020-10-26 19:26:11,660 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:11,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-26 19:26:11,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:26:11,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-26 19:26:11,660 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:11,884 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:26:11,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:11,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:11,891 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:11,891 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:26:11,891 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:26:11,891 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:26:11,891 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:11,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:26:11,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:26:11,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:26:11,892 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:11,898 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:26:11,899 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [553490840] [2020-10-26 19:26:11,901 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:26:11,902 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-26 19:26:11,902 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355395731] [2020-10-26 19:26:11,902 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-26 19:26:11,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:26:11,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-26 19:26:11,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-26 19:26:11,905 INFO L87 Difference]: Start difference. First operand 52 states and 55 transitions. Second operand 18 states. [2020-10-26 19:26:12,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:26:12,030 INFO L93 Difference]: Finished difference Result 72 states and 78 transitions. [2020-10-26 19:26:12,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-26 19:26:12,031 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 45 [2020-10-26 19:26:12,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:26:12,032 INFO L225 Difference]: With dead ends: 72 [2020-10-26 19:26:12,033 INFO L226 Difference]: Without dead ends: 55 [2020-10-26 19:26:12,034 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-26 19:26:12,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-26 19:26:12,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2020-10-26 19:26:12,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-26 19:26:12,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 57 transitions. [2020-10-26 19:26:12,038 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 57 transitions. Word has length 45 [2020-10-26 19:26:12,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:26:12,038 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 57 transitions. [2020-10-26 19:26:12,039 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-26 19:26:12,039 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 57 transitions. [2020-10-26 19:26:12,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-26 19:26:12,039 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:26:12,040 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:26:12,040 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-26 19:26:12,040 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:26:12,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:26:12,040 INFO L82 PathProgramCache]: Analyzing trace with hash 1878041611, now seen corresponding path program 15 times [2020-10-26 19:26:12,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:26:12,041 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [13567332] [2020-10-26 19:26:12,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:26:12,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:12,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:12,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:13,365 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:13,365 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-26 19:26:13,365 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:26:13,365 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1308 [2020-10-26 19:26:13,366 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:13,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-26 19:26:13,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:26:13,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-26 19:26:13,366 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:13,618 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:26:13,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:13,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:13,624 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:13,624 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:26:13,625 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:26:13,625 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:26:13,625 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:13,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:26:13,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:26:13,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:26:13,625 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:13,632 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:26:13,632 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [13567332] [2020-10-26 19:26:13,633 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:26:13,633 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-26 19:26:13,633 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008259339] [2020-10-26 19:26:13,633 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-26 19:26:13,633 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:26:13,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-26 19:26:13,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-26 19:26:13,637 INFO L87 Difference]: Start difference. First operand 54 states and 57 transitions. Second operand 19 states. [2020-10-26 19:26:13,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:26:13,815 INFO L93 Difference]: Finished difference Result 74 states and 80 transitions. [2020-10-26 19:26:13,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-26 19:26:13,816 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 47 [2020-10-26 19:26:13,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:26:13,817 INFO L225 Difference]: With dead ends: 74 [2020-10-26 19:26:13,817 INFO L226 Difference]: Without dead ends: 57 [2020-10-26 19:26:13,818 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-26 19:26:13,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-26 19:26:13,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 56. [2020-10-26 19:26:13,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-26 19:26:13,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 59 transitions. [2020-10-26 19:26:13,822 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 59 transitions. Word has length 47 [2020-10-26 19:26:13,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:26:13,822 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 59 transitions. [2020-10-26 19:26:13,823 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-26 19:26:13,823 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 59 transitions. [2020-10-26 19:26:13,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-26 19:26:13,823 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:26:13,823 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:26:13,823 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-26 19:26:13,824 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:26:13,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:26:13,824 INFO L82 PathProgramCache]: Analyzing trace with hash 591876713, now seen corresponding path program 16 times [2020-10-26 19:26:13,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:26:13,824 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1704384255] [2020-10-26 19:26:13,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:26:13,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:13,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:13,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:15,222 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:15,223 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-26 19:26:15,223 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:26:15,223 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1383 [2020-10-26 19:26:15,223 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:15,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-26 19:26:15,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:26:15,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-26 19:26:15,224 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:15,513 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:26:15,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:15,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:15,519 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:15,520 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:26:15,520 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:26:15,520 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:26:15,520 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:15,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:26:15,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:26:15,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:26:15,521 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:15,526 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:26:15,527 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1704384255] [2020-10-26 19:26:15,527 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:26:15,527 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-26 19:26:15,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802677231] [2020-10-26 19:26:15,527 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-26 19:26:15,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:26:15,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-26 19:26:15,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-26 19:26:15,529 INFO L87 Difference]: Start difference. First operand 56 states and 59 transitions. Second operand 20 states. [2020-10-26 19:26:15,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:26:15,658 INFO L93 Difference]: Finished difference Result 76 states and 82 transitions. [2020-10-26 19:26:15,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-26 19:26:15,659 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 49 [2020-10-26 19:26:15,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:26:15,660 INFO L225 Difference]: With dead ends: 76 [2020-10-26 19:26:15,660 INFO L226 Difference]: Without dead ends: 59 [2020-10-26 19:26:15,661 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-26 19:26:15,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-26 19:26:15,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 58. [2020-10-26 19:26:15,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-26 19:26:15,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 61 transitions. [2020-10-26 19:26:15,665 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 61 transitions. Word has length 49 [2020-10-26 19:26:15,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:26:15,665 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 61 transitions. [2020-10-26 19:26:15,666 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-26 19:26:15,666 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 61 transitions. [2020-10-26 19:26:15,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-26 19:26:15,666 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:26:15,666 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:26:15,666 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-26 19:26:15,667 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:26:15,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:26:15,667 INFO L82 PathProgramCache]: Analyzing trace with hash 1537990983, now seen corresponding path program 17 times [2020-10-26 19:26:15,667 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:26:15,667 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [518048692] [2020-10-26 19:26:15,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:26:15,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:15,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:15,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:17,093 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:17,094 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-26 19:26:17,094 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:26:17,094 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1412 [2020-10-26 19:26:17,094 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:17,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-26 19:26:17,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:26:17,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-26 19:26:17,094 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:17,412 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:26:17,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:17,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:17,420 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:17,420 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:26:17,420 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:26:17,420 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:26:17,420 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:17,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:26:17,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:26:17,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:26:17,421 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:17,428 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:26:17,428 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [518048692] [2020-10-26 19:26:17,428 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:26:17,429 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-26 19:26:17,429 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831607422] [2020-10-26 19:26:17,429 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-26 19:26:17,429 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:26:17,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-26 19:26:17,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-26 19:26:17,430 INFO L87 Difference]: Start difference. First operand 58 states and 61 transitions. Second operand 21 states. [2020-10-26 19:26:17,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:26:17,619 INFO L93 Difference]: Finished difference Result 78 states and 84 transitions. [2020-10-26 19:26:17,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-26 19:26:17,620 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 51 [2020-10-26 19:26:17,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:26:17,620 INFO L225 Difference]: With dead ends: 78 [2020-10-26 19:26:17,620 INFO L226 Difference]: Without dead ends: 61 [2020-10-26 19:26:17,621 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-26 19:26:17,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-26 19:26:17,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 60. [2020-10-26 19:26:17,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-26 19:26:17,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 63 transitions. [2020-10-26 19:26:17,625 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 63 transitions. Word has length 51 [2020-10-26 19:26:17,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:26:17,625 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 63 transitions. [2020-10-26 19:26:17,625 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-26 19:26:17,625 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 63 transitions. [2020-10-26 19:26:17,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-26 19:26:17,626 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:26:17,626 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:26:17,626 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-26 19:26:17,626 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:26:17,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:26:17,627 INFO L82 PathProgramCache]: Analyzing trace with hash 220737701, now seen corresponding path program 18 times [2020-10-26 19:26:17,627 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:26:17,627 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1656410148] [2020-10-26 19:26:17,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:26:17,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:17,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:17,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:19,259 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:19,260 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-26 19:26:19,260 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:26:19,260 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1617 [2020-10-26 19:26:19,260 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:19,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-26 19:26:19,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:26:19,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-26 19:26:19,260 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:19,618 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:26:19,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:19,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:19,624 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:19,624 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:26:19,624 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:26:19,625 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:26:19,625 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:19,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:26:19,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:26:19,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:26:19,625 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:19,631 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:26:19,631 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1656410148] [2020-10-26 19:26:19,632 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:26:19,632 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-26 19:26:19,632 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062553868] [2020-10-26 19:26:19,632 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-26 19:26:19,632 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:26:19,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-26 19:26:19,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-26 19:26:19,633 INFO L87 Difference]: Start difference. First operand 60 states and 63 transitions. Second operand 22 states. [2020-10-26 19:26:19,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:26:19,774 INFO L93 Difference]: Finished difference Result 80 states and 86 transitions. [2020-10-26 19:26:19,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-26 19:26:19,775 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 53 [2020-10-26 19:26:19,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:26:19,776 INFO L225 Difference]: With dead ends: 80 [2020-10-26 19:26:19,776 INFO L226 Difference]: Without dead ends: 63 [2020-10-26 19:26:19,776 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-26 19:26:19,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-26 19:26:19,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 62. [2020-10-26 19:26:19,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-26 19:26:19,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 65 transitions. [2020-10-26 19:26:19,780 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 65 transitions. Word has length 53 [2020-10-26 19:26:19,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:26:19,781 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 65 transitions. [2020-10-26 19:26:19,781 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-26 19:26:19,781 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 65 transitions. [2020-10-26 19:26:19,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-26 19:26:19,781 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:26:19,781 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:26:19,782 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-26 19:26:19,782 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:26:19,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:26:19,782 INFO L82 PathProgramCache]: Analyzing trace with hash 1355686019, now seen corresponding path program 19 times [2020-10-26 19:26:19,782 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:26:19,783 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [653491544] [2020-10-26 19:26:19,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:26:19,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:19,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:19,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:21,422 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:21,422 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-26 19:26:21,422 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:26:21,422 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1624 [2020-10-26 19:26:21,422 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:21,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-26 19:26:21,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:26:21,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-26 19:26:21,423 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:21,808 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:26:21,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:21,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:21,813 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:21,813 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:26:21,813 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:26:21,813 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:26:21,813 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:21,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:26:21,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:26:21,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:26:21,814 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:21,820 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:26:21,821 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [653491544] [2020-10-26 19:26:21,821 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:26:21,821 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-26 19:26:21,821 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124743401] [2020-10-26 19:26:21,822 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-26 19:26:21,822 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:26:21,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-26 19:26:21,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-26 19:26:21,823 INFO L87 Difference]: Start difference. First operand 62 states and 65 transitions. Second operand 23 states. [2020-10-26 19:26:22,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:26:22,009 INFO L93 Difference]: Finished difference Result 82 states and 88 transitions. [2020-10-26 19:26:22,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-26 19:26:22,010 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 55 [2020-10-26 19:26:22,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:26:22,011 INFO L225 Difference]: With dead ends: 82 [2020-10-26 19:26:22,011 INFO L226 Difference]: Without dead ends: 65 [2020-10-26 19:26:22,012 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-26 19:26:22,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-26 19:26:22,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 64. [2020-10-26 19:26:22,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-26 19:26:22,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 67 transitions. [2020-10-26 19:26:22,016 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 67 transitions. Word has length 55 [2020-10-26 19:26:22,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:26:22,016 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 67 transitions. [2020-10-26 19:26:22,016 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-26 19:26:22,016 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 67 transitions. [2020-10-26 19:26:22,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-26 19:26:22,017 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:26:22,017 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:26:22,017 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-26 19:26:22,017 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:26:22,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:26:22,018 INFO L82 PathProgramCache]: Analyzing trace with hash 1119326433, now seen corresponding path program 20 times [2020-10-26 19:26:22,018 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:26:22,018 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2116183270] [2020-10-26 19:26:22,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:26:22,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:22,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:22,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:23,817 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:23,817 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-26 19:26:23,817 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:26:23,817 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1785 [2020-10-26 19:26:23,818 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:23,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-26 19:26:23,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:26:23,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-26 19:26:23,818 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:24,212 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:26:24,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:24,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:24,218 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:24,218 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:26:24,218 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:26:24,218 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:26:24,218 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:24,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:26:24,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:26:24,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:26:24,219 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:24,225 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:26:24,225 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2116183270] [2020-10-26 19:26:24,226 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:26:24,226 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-26 19:26:24,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722736187] [2020-10-26 19:26:24,226 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-26 19:26:24,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:26:24,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-26 19:26:24,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-26 19:26:24,228 INFO L87 Difference]: Start difference. First operand 64 states and 67 transitions. Second operand 24 states. [2020-10-26 19:26:24,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:26:24,457 INFO L93 Difference]: Finished difference Result 84 states and 90 transitions. [2020-10-26 19:26:24,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-26 19:26:24,459 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 57 [2020-10-26 19:26:24,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:26:24,460 INFO L225 Difference]: With dead ends: 84 [2020-10-26 19:26:24,460 INFO L226 Difference]: Without dead ends: 67 [2020-10-26 19:26:24,464 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-26 19:26:24,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-26 19:26:24,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 66. [2020-10-26 19:26:24,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-26 19:26:24,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 69 transitions. [2020-10-26 19:26:24,468 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 69 transitions. Word has length 57 [2020-10-26 19:26:24,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:26:24,469 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 69 transitions. [2020-10-26 19:26:24,469 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-26 19:26:24,469 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 69 transitions. [2020-10-26 19:26:24,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-26 19:26:24,470 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:26:24,470 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:26:24,473 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-26 19:26:24,473 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:26:24,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:26:24,473 INFO L82 PathProgramCache]: Analyzing trace with hash 1611030975, now seen corresponding path program 21 times [2020-10-26 19:26:24,474 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:26:24,474 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [121414574] [2020-10-26 19:26:24,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:26:24,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:24,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:24,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:26,294 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:26,294 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-26 19:26:26,294 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:26:26,295 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1805 [2020-10-26 19:26:26,295 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:26,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-26 19:26:26,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:26:26,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-26 19:26:26,295 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:26,755 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:26:26,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:26,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:26,760 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:26,760 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:26:26,760 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:26:26,760 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:26:26,760 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:26,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:26:26,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:26:26,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:26:26,761 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:26,772 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:26:26,773 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [121414574] [2020-10-26 19:26:26,773 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:26:26,773 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-26 19:26:26,773 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564869630] [2020-10-26 19:26:26,774 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-26 19:26:26,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:26:26,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-26 19:26:26,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-26 19:26:26,775 INFO L87 Difference]: Start difference. First operand 66 states and 69 transitions. Second operand 25 states. [2020-10-26 19:26:27,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:26:27,056 INFO L93 Difference]: Finished difference Result 86 states and 92 transitions. [2020-10-26 19:26:27,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-26 19:26:27,056 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 59 [2020-10-26 19:26:27,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:26:27,057 INFO L225 Difference]: With dead ends: 86 [2020-10-26 19:26:27,057 INFO L226 Difference]: Without dead ends: 69 [2020-10-26 19:26:27,058 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-26 19:26:27,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-26 19:26:27,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 68. [2020-10-26 19:26:27,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-26 19:26:27,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 71 transitions. [2020-10-26 19:26:27,062 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 71 transitions. Word has length 59 [2020-10-26 19:26:27,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:26:27,062 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 71 transitions. [2020-10-26 19:26:27,062 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-26 19:26:27,062 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 71 transitions. [2020-10-26 19:26:27,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-26 19:26:27,063 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:26:27,063 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:26:27,063 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-26 19:26:27,063 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:26:27,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:26:27,063 INFO L82 PathProgramCache]: Analyzing trace with hash 1692693277, now seen corresponding path program 22 times [2020-10-26 19:26:27,064 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:26:27,064 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1929008396] [2020-10-26 19:26:27,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:26:27,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:27,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:27,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:28,966 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:28,967 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-26 19:26:28,967 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:26:28,967 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1889 [2020-10-26 19:26:28,967 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:28,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-26 19:26:28,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:26:28,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-26 19:26:28,967 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:29,422 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:26:29,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:29,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:29,427 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:29,427 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:26:29,427 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:26:29,427 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:26:29,427 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:29,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:26:29,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:26:29,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:26:29,428 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:29,435 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:26:29,435 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1929008396] [2020-10-26 19:26:29,435 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:26:29,435 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-26 19:26:29,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362100259] [2020-10-26 19:26:29,436 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-26 19:26:29,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:26:29,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-26 19:26:29,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-26 19:26:29,437 INFO L87 Difference]: Start difference. First operand 68 states and 71 transitions. Second operand 26 states. [2020-10-26 19:26:29,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:26:29,668 INFO L93 Difference]: Finished difference Result 88 states and 94 transitions. [2020-10-26 19:26:29,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-26 19:26:29,668 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 61 [2020-10-26 19:26:29,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:26:29,669 INFO L225 Difference]: With dead ends: 88 [2020-10-26 19:26:29,669 INFO L226 Difference]: Without dead ends: 71 [2020-10-26 19:26:29,670 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-26 19:26:29,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-26 19:26:29,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 70. [2020-10-26 19:26:29,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-26 19:26:29,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 73 transitions. [2020-10-26 19:26:29,674 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 73 transitions. Word has length 61 [2020-10-26 19:26:29,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:26:29,674 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 73 transitions. [2020-10-26 19:26:29,674 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-26 19:26:29,674 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 73 transitions. [2020-10-26 19:26:29,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-26 19:26:29,675 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:26:29,675 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:26:29,675 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-26 19:26:29,675 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:26:29,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:26:29,676 INFO L82 PathProgramCache]: Analyzing trace with hash -1434213125, now seen corresponding path program 23 times [2020-10-26 19:26:29,676 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:26:29,676 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [506538159] [2020-10-26 19:26:29,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:26:29,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:29,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:29,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:31,309 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:31,309 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-26 19:26:31,309 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:26:31,309 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1619 [2020-10-26 19:26:31,310 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:31,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-26 19:26:31,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:26:31,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-26 19:26:31,310 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:31,823 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:26:31,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:31,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:31,828 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:31,828 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:26:31,828 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:26:31,828 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:26:31,828 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:31,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:26:31,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:26:31,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:26:31,829 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:31,836 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:26:31,836 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [506538159] [2020-10-26 19:26:31,836 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:26:31,836 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-26 19:26:31,836 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827297454] [2020-10-26 19:26:31,837 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-26 19:26:31,837 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:26:31,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-26 19:26:31,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-26 19:26:31,838 INFO L87 Difference]: Start difference. First operand 70 states and 73 transitions. Second operand 27 states. [2020-10-26 19:26:32,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:26:32,091 INFO L93 Difference]: Finished difference Result 90 states and 96 transitions. [2020-10-26 19:26:32,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-26 19:26:32,092 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 63 [2020-10-26 19:26:32,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:26:32,093 INFO L225 Difference]: With dead ends: 90 [2020-10-26 19:26:32,093 INFO L226 Difference]: Without dead ends: 73 [2020-10-26 19:26:32,094 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-26 19:26:32,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-26 19:26:32,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 72. [2020-10-26 19:26:32,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-26 19:26:32,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 75 transitions. [2020-10-26 19:26:32,098 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 75 transitions. Word has length 63 [2020-10-26 19:26:32,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:26:32,099 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 75 transitions. [2020-10-26 19:26:32,099 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-26 19:26:32,099 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 75 transitions. [2020-10-26 19:26:32,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-26 19:26:32,099 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:26:32,099 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:26:32,100 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-26 19:26:32,100 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:26:32,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:26:32,100 INFO L82 PathProgramCache]: Analyzing trace with hash 85841753, now seen corresponding path program 24 times [2020-10-26 19:26:32,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:26:32,100 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1845723136] [2020-10-26 19:26:32,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:26:32,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:32,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:32,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:33,906 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:33,906 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-26 19:26:33,906 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:26:33,907 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1789 [2020-10-26 19:26:33,907 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:33,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-26 19:26:33,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:26:33,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-26 19:26:33,907 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:34,437 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:26:34,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:34,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:34,441 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:34,442 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:26:34,442 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:26:34,442 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:26:34,442 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:34,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:26:34,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:26:34,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:26:34,442 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:34,447 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:26:34,448 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1845723136] [2020-10-26 19:26:34,448 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:26:34,448 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-26 19:26:34,448 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086037203] [2020-10-26 19:26:34,448 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-26 19:26:34,448 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:26:34,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-26 19:26:34,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-26 19:26:34,450 INFO L87 Difference]: Start difference. First operand 72 states and 75 transitions. Second operand 28 states. [2020-10-26 19:26:34,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:26:34,642 INFO L93 Difference]: Finished difference Result 92 states and 98 transitions. [2020-10-26 19:26:34,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-26 19:26:34,643 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 65 [2020-10-26 19:26:34,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:26:34,644 INFO L225 Difference]: With dead ends: 92 [2020-10-26 19:26:34,644 INFO L226 Difference]: Without dead ends: 75 [2020-10-26 19:26:34,645 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-26 19:26:34,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-26 19:26:34,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 74. [2020-10-26 19:26:34,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-26 19:26:34,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 77 transitions. [2020-10-26 19:26:34,649 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 77 transitions. Word has length 65 [2020-10-26 19:26:34,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:26:34,649 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 77 transitions. [2020-10-26 19:26:34,650 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-26 19:26:34,650 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 77 transitions. [2020-10-26 19:26:34,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-26 19:26:34,650 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:26:34,650 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:26:34,650 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-26 19:26:34,651 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:26:34,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:26:34,651 INFO L82 PathProgramCache]: Analyzing trace with hash 569698871, now seen corresponding path program 25 times [2020-10-26 19:26:34,651 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:26:34,651 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1737124681] [2020-10-26 19:26:34,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:26:34,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:34,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:34,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:36,612 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:36,612 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-26 19:26:36,612 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:26:36,612 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1941 [2020-10-26 19:26:36,612 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:36,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-26 19:26:36,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:26:36,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-26 19:26:36,613 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:37,172 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:26:37,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:37,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:37,177 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:37,177 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:26:37,177 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:26:37,178 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:26:37,178 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:37,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:26:37,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:26:37,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:26:37,178 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:37,185 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:26:37,186 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1737124681] [2020-10-26 19:26:37,186 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:26:37,186 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-26 19:26:37,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674586069] [2020-10-26 19:26:37,186 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-26 19:26:37,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:26:37,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-26 19:26:37,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-26 19:26:37,188 INFO L87 Difference]: Start difference. First operand 74 states and 77 transitions. Second operand 29 states. [2020-10-26 19:26:37,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:26:37,485 INFO L93 Difference]: Finished difference Result 94 states and 100 transitions. [2020-10-26 19:26:37,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-26 19:26:37,486 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 67 [2020-10-26 19:26:37,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:26:37,487 INFO L225 Difference]: With dead ends: 94 [2020-10-26 19:26:37,487 INFO L226 Difference]: Without dead ends: 77 [2020-10-26 19:26:37,488 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-26 19:26:37,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-26 19:26:37,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 76. [2020-10-26 19:26:37,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-26 19:26:37,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 79 transitions. [2020-10-26 19:26:37,492 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 79 transitions. Word has length 67 [2020-10-26 19:26:37,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:26:37,493 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 79 transitions. [2020-10-26 19:26:37,493 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-26 19:26:37,493 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 79 transitions. [2020-10-26 19:26:37,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-26 19:26:37,494 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:26:37,494 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:26:37,494 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-26 19:26:37,494 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:26:37,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:26:37,494 INFO L82 PathProgramCache]: Analyzing trace with hash 1699921301, now seen corresponding path program 26 times [2020-10-26 19:26:37,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:26:37,495 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1492068840] [2020-10-26 19:26:37,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:26:37,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:37,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:37,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:39,432 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:39,433 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-26 19:26:39,433 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:26:39,433 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1920 [2020-10-26 19:26:39,433 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:39,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-26 19:26:39,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:26:39,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-26 19:26:39,433 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:40,019 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:26:40,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:40,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:40,024 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:40,024 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:26:40,024 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:26:40,025 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:26:40,025 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:40,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:26:40,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:26:40,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:26:40,025 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:40,031 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:26:40,031 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1492068840] [2020-10-26 19:26:40,031 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:26:40,032 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-26 19:26:40,032 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244838129] [2020-10-26 19:26:40,032 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-26 19:26:40,032 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:26:40,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-26 19:26:40,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-26 19:26:40,033 INFO L87 Difference]: Start difference. First operand 76 states and 79 transitions. Second operand 30 states. [2020-10-26 19:26:40,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:26:40,327 INFO L93 Difference]: Finished difference Result 96 states and 102 transitions. [2020-10-26 19:26:40,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-26 19:26:40,328 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 69 [2020-10-26 19:26:40,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:26:40,329 INFO L225 Difference]: With dead ends: 96 [2020-10-26 19:26:40,330 INFO L226 Difference]: Without dead ends: 79 [2020-10-26 19:26:40,330 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-26 19:26:40,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-26 19:26:40,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 78. [2020-10-26 19:26:40,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-26 19:26:40,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 81 transitions. [2020-10-26 19:26:40,338 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 81 transitions. Word has length 69 [2020-10-26 19:26:40,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:26:40,339 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 81 transitions. [2020-10-26 19:26:40,339 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-26 19:26:40,339 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 81 transitions. [2020-10-26 19:26:40,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-26 19:26:40,340 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:26:40,340 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:26:40,340 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-26 19:26:40,340 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:26:40,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:26:40,341 INFO L82 PathProgramCache]: Analyzing trace with hash 1216950643, now seen corresponding path program 27 times [2020-10-26 19:26:40,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:26:40,341 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1638923175] [2020-10-26 19:26:40,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:26:40,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:40,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:40,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:42,839 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:42,840 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-26 19:26:42,840 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:26:42,840 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2474 [2020-10-26 19:26:42,840 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:42,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-26 19:26:42,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:26:42,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-26 19:26:42,840 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:43,469 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:26:43,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:43,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:43,474 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:43,474 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:26:43,474 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:26:43,474 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:26:43,474 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:43,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:26:43,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:26:43,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:26:43,475 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:43,481 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:26:43,481 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1638923175] [2020-10-26 19:26:43,481 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:26:43,482 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-26 19:26:43,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651006698] [2020-10-26 19:26:43,482 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-26 19:26:43,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:26:43,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-26 19:26:43,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-26 19:26:43,483 INFO L87 Difference]: Start difference. First operand 78 states and 81 transitions. Second operand 31 states. [2020-10-26 19:26:43,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:26:43,795 INFO L93 Difference]: Finished difference Result 98 states and 104 transitions. [2020-10-26 19:26:43,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-26 19:26:43,795 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 71 [2020-10-26 19:26:43,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:26:43,796 INFO L225 Difference]: With dead ends: 98 [2020-10-26 19:26:43,796 INFO L226 Difference]: Without dead ends: 81 [2020-10-26 19:26:43,798 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-26 19:26:43,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-26 19:26:43,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 80. [2020-10-26 19:26:43,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-26 19:26:43,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 83 transitions. [2020-10-26 19:26:43,802 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 83 transitions. Word has length 71 [2020-10-26 19:26:43,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:26:43,803 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 83 transitions. [2020-10-26 19:26:43,803 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-26 19:26:43,803 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 83 transitions. [2020-10-26 19:26:43,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-26 19:26:43,803 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:26:43,804 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:26:43,804 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-26 19:26:43,804 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:26:43,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:26:43,804 INFO L82 PathProgramCache]: Analyzing trace with hash 938616273, now seen corresponding path program 28 times [2020-10-26 19:26:43,804 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:26:43,805 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1182729799] [2020-10-26 19:26:43,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:26:43,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:43,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:43,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:46,282 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:46,282 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-26 19:26:46,282 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:26:46,282 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2459 [2020-10-26 19:26:46,282 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:46,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-26 19:26:46,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:26:46,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-26 19:26:46,283 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:46,970 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:26:46,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:46,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:46,974 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:46,975 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:26:46,975 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:26:46,975 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:26:46,975 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:46,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:26:46,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:26:46,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:26:46,975 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:46,984 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:26:46,984 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1182729799] [2020-10-26 19:26:46,984 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:26:46,984 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-26 19:26:46,984 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128361605] [2020-10-26 19:26:46,985 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-26 19:26:46,985 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:26:46,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-26 19:26:46,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-26 19:26:46,986 INFO L87 Difference]: Start difference. First operand 80 states and 83 transitions. Second operand 32 states. [2020-10-26 19:26:47,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:26:47,154 INFO L93 Difference]: Finished difference Result 100 states and 106 transitions. [2020-10-26 19:26:47,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-26 19:26:47,155 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 73 [2020-10-26 19:26:47,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:26:47,156 INFO L225 Difference]: With dead ends: 100 [2020-10-26 19:26:47,156 INFO L226 Difference]: Without dead ends: 83 [2020-10-26 19:26:47,157 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-26 19:26:47,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-26 19:26:47,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 82. [2020-10-26 19:26:47,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-26 19:26:47,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 85 transitions. [2020-10-26 19:26:47,163 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 85 transitions. Word has length 73 [2020-10-26 19:26:47,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:26:47,163 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 85 transitions. [2020-10-26 19:26:47,163 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-26 19:26:47,163 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 85 transitions. [2020-10-26 19:26:47,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-26 19:26:47,164 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:26:47,164 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:26:47,164 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-26 19:26:47,164 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:26:47,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:26:47,165 INFO L82 PathProgramCache]: Analyzing trace with hash -252740945, now seen corresponding path program 29 times [2020-10-26 19:26:47,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:26:47,165 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [426312779] [2020-10-26 19:26:47,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:26:47,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:47,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:47,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:49,700 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:49,700 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-26 19:26:49,700 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:26:49,700 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2519 [2020-10-26 19:26:49,700 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:49,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-26 19:26:49,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:26:49,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-26 19:26:49,701 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:50,409 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:26:50,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:50,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:50,414 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:50,414 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:26:50,414 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:26:50,414 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:26:50,415 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:50,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:26:50,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:26:50,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:26:50,415 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:50,424 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:26:50,425 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [426312779] [2020-10-26 19:26:50,426 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:26:50,426 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-26 19:26:50,426 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035328893] [2020-10-26 19:26:50,428 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-26 19:26:50,429 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:26:50,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-26 19:26:50,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-26 19:26:50,430 INFO L87 Difference]: Start difference. First operand 82 states and 85 transitions. Second operand 33 states. [2020-10-26 19:26:50,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:26:50,766 INFO L93 Difference]: Finished difference Result 102 states and 108 transitions. [2020-10-26 19:26:50,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-26 19:26:50,766 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 75 [2020-10-26 19:26:50,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:26:50,768 INFO L225 Difference]: With dead ends: 102 [2020-10-26 19:26:50,768 INFO L226 Difference]: Without dead ends: 85 [2020-10-26 19:26:50,769 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-26 19:26:50,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-26 19:26:50,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 84. [2020-10-26 19:26:50,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-26 19:26:50,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 87 transitions. [2020-10-26 19:26:50,782 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 87 transitions. Word has length 75 [2020-10-26 19:26:50,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:26:50,782 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 87 transitions. [2020-10-26 19:26:50,782 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-26 19:26:50,782 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 87 transitions. [2020-10-26 19:26:50,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-26 19:26:50,783 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:26:50,783 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:26:50,783 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-26 19:26:50,784 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:26:50,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:26:50,784 INFO L82 PathProgramCache]: Analyzing trace with hash 1609240589, now seen corresponding path program 30 times [2020-10-26 19:26:50,784 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:26:50,784 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [495715193] [2020-10-26 19:26:50,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:26:50,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:50,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:50,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:53,526 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:53,527 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-26 19:26:53,527 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:26:53,527 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2724 [2020-10-26 19:26:53,527 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:53,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-26 19:26:53,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:26:53,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-26 19:26:53,527 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:54,269 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:26:54,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:54,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:54,274 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:54,274 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:26:54,274 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:26:54,274 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:26:54,275 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:54,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:26:54,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:26:54,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:26:54,275 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:54,283 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:26:54,283 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [495715193] [2020-10-26 19:26:54,283 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:26:54,284 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-26 19:26:54,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564583835] [2020-10-26 19:26:54,284 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-26 19:26:54,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:26:54,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-26 19:26:54,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-26 19:26:54,285 INFO L87 Difference]: Start difference. First operand 84 states and 87 transitions. Second operand 34 states. [2020-10-26 19:26:54,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:26:54,626 INFO L93 Difference]: Finished difference Result 104 states and 110 transitions. [2020-10-26 19:26:54,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-26 19:26:54,627 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 77 [2020-10-26 19:26:54,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:26:54,628 INFO L225 Difference]: With dead ends: 104 [2020-10-26 19:26:54,628 INFO L226 Difference]: Without dead ends: 87 [2020-10-26 19:26:54,629 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-26 19:26:54,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-26 19:26:54,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 86. [2020-10-26 19:26:54,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-26 19:26:54,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 89 transitions. [2020-10-26 19:26:54,633 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 89 transitions. Word has length 77 [2020-10-26 19:26:54,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:26:54,634 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 89 transitions. [2020-10-26 19:26:54,634 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-26 19:26:54,634 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 89 transitions. [2020-10-26 19:26:54,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-26 19:26:54,635 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:26:54,635 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:26:54,635 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-26 19:26:54,635 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:26:54,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:26:54,635 INFO L82 PathProgramCache]: Analyzing trace with hash -27867669, now seen corresponding path program 31 times [2020-10-26 19:26:54,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:26:54,636 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2128951952] [2020-10-26 19:26:54,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:26:54,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:54,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:54,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:57,598 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:57,598 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-26 19:26:57,598 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:26:57,598 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2947 [2020-10-26 19:26:57,599 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:57,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-26 19:26:57,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:26:57,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-26 19:26:57,599 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:58,387 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:26:58,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:58,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:58,392 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:58,392 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:26:58,392 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:26:58,392 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:26:58,393 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:58,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:26:58,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:26:58,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:26:58,393 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:58,399 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:26:58,400 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2128951952] [2020-10-26 19:26:58,400 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:26:58,400 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-26 19:26:58,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520598398] [2020-10-26 19:26:58,400 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-26 19:26:58,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:26:58,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-26 19:26:58,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-26 19:26:58,402 INFO L87 Difference]: Start difference. First operand 86 states and 89 transitions. Second operand 35 states. [2020-10-26 19:26:58,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:26:58,748 INFO L93 Difference]: Finished difference Result 106 states and 112 transitions. [2020-10-26 19:26:58,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-26 19:26:58,748 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 79 [2020-10-26 19:26:58,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:26:58,749 INFO L225 Difference]: With dead ends: 106 [2020-10-26 19:26:58,749 INFO L226 Difference]: Without dead ends: 89 [2020-10-26 19:26:58,751 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-26 19:26:58,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-26 19:26:58,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 88. [2020-10-26 19:26:58,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-26 19:26:58,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 91 transitions. [2020-10-26 19:26:58,755 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 91 transitions. Word has length 79 [2020-10-26 19:26:58,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:26:58,756 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 91 transitions. [2020-10-26 19:26:58,756 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-26 19:26:58,756 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 91 transitions. [2020-10-26 19:26:58,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-26 19:26:58,757 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:26:58,757 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:26:58,757 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-26 19:26:58,757 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:26:58,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:26:58,758 INFO L82 PathProgramCache]: Analyzing trace with hash -1330873271, now seen corresponding path program 32 times [2020-10-26 19:26:58,758 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:26:58,758 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [104957034] [2020-10-26 19:26:58,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:26:58,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:58,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:58,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:01,834 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:27:01,835 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-26 19:27:01,835 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:27:01,835 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3061 [2020-10-26 19:27:01,835 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:27:01,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-26 19:27:01,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:27:01,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-26 19:27:01,836 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:27:02,673 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:27:02,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:27:02,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:02,677 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:27:02,677 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:27:02,677 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:27:02,677 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:27:02,677 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:27:02,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:27:02,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:27:02,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:27:02,678 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:27:02,685 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:27:02,685 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [104957034] [2020-10-26 19:27:02,685 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:27:02,686 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-26 19:27:02,686 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494080576] [2020-10-26 19:27:02,686 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-26 19:27:02,686 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:27:02,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-26 19:27:02,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-26 19:27:02,687 INFO L87 Difference]: Start difference. First operand 88 states and 91 transitions. Second operand 36 states. [2020-10-26 19:27:03,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:27:03,042 INFO L93 Difference]: Finished difference Result 108 states and 114 transitions. [2020-10-26 19:27:03,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-26 19:27:03,042 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 81 [2020-10-26 19:27:03,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:27:03,044 INFO L225 Difference]: With dead ends: 108 [2020-10-26 19:27:03,044 INFO L226 Difference]: Without dead ends: 91 [2020-10-26 19:27:03,045 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-26 19:27:03,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-26 19:27:03,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 90. [2020-10-26 19:27:03,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-10-26 19:27:03,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 93 transitions. [2020-10-26 19:27:03,050 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 93 transitions. Word has length 81 [2020-10-26 19:27:03,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:27:03,051 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 93 transitions. [2020-10-26 19:27:03,051 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-26 19:27:03,051 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 93 transitions. [2020-10-26 19:27:03,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-26 19:27:03,052 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:27:03,052 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:27:03,052 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-26 19:27:03,052 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:27:03,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:27:03,052 INFO L82 PathProgramCache]: Analyzing trace with hash 611193639, now seen corresponding path program 33 times [2020-10-26 19:27:03,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:27:03,053 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1415068857] [2020-10-26 19:27:03,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:27:03,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:27:03,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:03,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:06,391 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:27:06,391 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-10-26 19:27:06,391 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:27:06,391 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3321 [2020-10-26 19:27:06,391 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:27:06,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-26 19:27:06,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:27:06,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-26 19:27:06,391 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:27:07,269 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:27:07,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:27:07,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:07,273 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:27:07,273 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:27:07,273 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:27:07,273 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:27:07,273 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:27:07,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:27:07,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:27:07,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:27:07,274 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:27:07,284 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:27:07,284 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1415068857] [2020-10-26 19:27:07,284 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:27:07,285 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-26 19:27:07,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781688112] [2020-10-26 19:27:07,285 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-26 19:27:07,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:27:07,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-26 19:27:07,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-26 19:27:07,287 INFO L87 Difference]: Start difference. First operand 90 states and 93 transitions. Second operand 37 states. [2020-10-26 19:27:07,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:27:07,648 INFO L93 Difference]: Finished difference Result 110 states and 116 transitions. [2020-10-26 19:27:07,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-26 19:27:07,648 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 83 [2020-10-26 19:27:07,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:27:07,649 INFO L225 Difference]: With dead ends: 110 [2020-10-26 19:27:07,649 INFO L226 Difference]: Without dead ends: 93 [2020-10-26 19:27:07,650 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-26 19:27:07,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-26 19:27:07,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 92. [2020-10-26 19:27:07,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-26 19:27:07,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 95 transitions. [2020-10-26 19:27:07,657 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 95 transitions. Word has length 83 [2020-10-26 19:27:07,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:27:07,658 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 95 transitions. [2020-10-26 19:27:07,658 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-26 19:27:07,658 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 95 transitions. [2020-10-26 19:27:07,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-26 19:27:07,659 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:27:07,659 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:27:07,659 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-26 19:27:07,659 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:27:07,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:27:07,659 INFO L82 PathProgramCache]: Analyzing trace with hash -1373279611, now seen corresponding path program 34 times [2020-10-26 19:27:07,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:27:07,660 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1081569509] [2020-10-26 19:27:07,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:27:07,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:27:07,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:07,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:11,251 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:27:11,251 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-26 19:27:11,251 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:27:11,251 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3573 [2020-10-26 19:27:11,251 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:27:11,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-26 19:27:11,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:27:11,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-26 19:27:11,252 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:27:12,185 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:27:12,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:27:12,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:12,190 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:27:12,190 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:27:12,190 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:27:12,190 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:27:12,190 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:27:12,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:27:12,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:27:12,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:27:12,190 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:27:12,198 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:27:12,198 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1081569509] [2020-10-26 19:27:12,198 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:27:12,199 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-26 19:27:12,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133262413] [2020-10-26 19:27:12,199 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-26 19:27:12,199 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:27:12,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-26 19:27:12,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-26 19:27:12,200 INFO L87 Difference]: Start difference. First operand 92 states and 95 transitions. Second operand 38 states. [2020-10-26 19:27:12,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:27:12,442 INFO L93 Difference]: Finished difference Result 112 states and 118 transitions. [2020-10-26 19:27:12,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-26 19:27:12,443 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 85 [2020-10-26 19:27:12,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:27:12,444 INFO L225 Difference]: With dead ends: 112 [2020-10-26 19:27:12,444 INFO L226 Difference]: Without dead ends: 95 [2020-10-26 19:27:12,446 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-26 19:27:12,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-26 19:27:12,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 94. [2020-10-26 19:27:12,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-26 19:27:12,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 97 transitions. [2020-10-26 19:27:12,456 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 97 transitions. Word has length 85 [2020-10-26 19:27:12,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:27:12,456 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 97 transitions. [2020-10-26 19:27:12,456 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-26 19:27:12,456 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 97 transitions. [2020-10-26 19:27:12,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-10-26 19:27:12,457 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:27:12,457 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:27:12,457 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-26 19:27:12,462 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:27:12,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:27:12,462 INFO L82 PathProgramCache]: Analyzing trace with hash -1486593437, now seen corresponding path program 35 times [2020-10-26 19:27:12,463 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:27:12,463 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [919661893] [2020-10-26 19:27:12,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:27:12,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:27:12,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:12,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:16,440 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:27:16,441 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 97 [2020-10-26 19:27:16,441 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:27:16,441 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3941 [2020-10-26 19:27:16,441 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:27:16,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-26 19:27:16,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:27:16,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-26 19:27:16,441 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:27:17,489 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:27:17,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:27:17,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:17,494 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:27:17,494 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:27:17,494 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:27:17,494 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:27:17,494 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:27:17,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:27:17,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:27:17,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:27:17,495 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:27:17,506 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:27:17,506 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [919661893] [2020-10-26 19:27:17,506 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:27:17,506 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-26 19:27:17,507 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618473554] [2020-10-26 19:27:17,507 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-26 19:27:17,507 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:27:17,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-26 19:27:17,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-26 19:27:17,508 INFO L87 Difference]: Start difference. First operand 94 states and 97 transitions. Second operand 39 states. [2020-10-26 19:27:17,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:27:17,893 INFO L93 Difference]: Finished difference Result 114 states and 120 transitions. [2020-10-26 19:27:17,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-26 19:27:17,893 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 87 [2020-10-26 19:27:17,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:27:17,895 INFO L225 Difference]: With dead ends: 114 [2020-10-26 19:27:17,895 INFO L226 Difference]: Without dead ends: 97 [2020-10-26 19:27:17,896 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-26 19:27:17,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-26 19:27:17,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 96. [2020-10-26 19:27:17,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-10-26 19:27:17,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 99 transitions. [2020-10-26 19:27:17,901 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 99 transitions. Word has length 87 [2020-10-26 19:27:17,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:27:17,902 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 99 transitions. [2020-10-26 19:27:17,902 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-26 19:27:17,902 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 99 transitions. [2020-10-26 19:27:17,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-10-26 19:27:17,903 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:27:17,903 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:27:17,903 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-26 19:27:17,903 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:27:17,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:27:17,904 INFO L82 PathProgramCache]: Analyzing trace with hash 1287969473, now seen corresponding path program 36 times [2020-10-26 19:27:17,904 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:27:17,904 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [393273267] [2020-10-26 19:27:17,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:27:17,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:27:17,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:17,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:22,247 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:27:22,247 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 99 [2020-10-26 19:27:22,247 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:27:22,247 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4321 [2020-10-26 19:27:22,248 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:27:22,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-26 19:27:22,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:27:22,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-26 19:27:22,248 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:27:23,259 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:27:23,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:27:23,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:23,263 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:27:23,263 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:27:23,263 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:27:23,264 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:27:23,264 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:27:23,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:27:23,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:27:23,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:27:23,264 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:27:23,273 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:27:23,273 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [393273267] [2020-10-26 19:27:23,273 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:27:23,274 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-26 19:27:23,274 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317136405] [2020-10-26 19:27:23,274 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-26 19:27:23,274 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:27:23,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-26 19:27:23,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-26 19:27:23,275 INFO L87 Difference]: Start difference. First operand 96 states and 99 transitions. Second operand 40 states. [2020-10-26 19:27:23,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:27:23,509 INFO L93 Difference]: Finished difference Result 116 states and 122 transitions. [2020-10-26 19:27:23,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-26 19:27:23,509 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 89 [2020-10-26 19:27:23,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:27:23,511 INFO L225 Difference]: With dead ends: 116 [2020-10-26 19:27:23,511 INFO L226 Difference]: Without dead ends: 99 [2020-10-26 19:27:23,512 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-26 19:27:23,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-26 19:27:23,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 98. [2020-10-26 19:27:23,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-26 19:27:23,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 101 transitions. [2020-10-26 19:27:23,517 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 101 transitions. Word has length 89 [2020-10-26 19:27:23,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:27:23,517 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 101 transitions. [2020-10-26 19:27:23,517 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-26 19:27:23,517 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 101 transitions. [2020-10-26 19:27:23,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-10-26 19:27:23,518 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:27:23,518 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:27:23,519 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-26 19:27:23,519 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:27:23,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:27:23,519 INFO L82 PathProgramCache]: Analyzing trace with hash 468235167, now seen corresponding path program 37 times [2020-10-26 19:27:23,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:27:23,519 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [709123084] [2020-10-26 19:27:23,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:27:23,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:27:23,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:23,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:28,074 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:27:28,074 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-26 19:27:28,074 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:27:28,074 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4536 [2020-10-26 19:27:28,074 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:27:28,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-26 19:27:28,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:27:28,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-26 19:27:28,075 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:27:29,171 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:27:29,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:27:29,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:29,175 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:27:29,175 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:27:29,175 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:27:29,175 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:27:29,176 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:27:29,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:27:29,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:27:29,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:27:29,176 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:27:29,185 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:27:29,185 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [709123084] [2020-10-26 19:27:29,185 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:27:29,185 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-26 19:27:29,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660051621] [2020-10-26 19:27:29,185 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-26 19:27:29,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:27:29,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-26 19:27:29,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-10-26 19:27:29,187 INFO L87 Difference]: Start difference. First operand 98 states and 101 transitions. Second operand 41 states. [2020-10-26 19:27:29,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:27:29,602 INFO L93 Difference]: Finished difference Result 118 states and 124 transitions. [2020-10-26 19:27:29,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-26 19:27:29,602 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 91 [2020-10-26 19:27:29,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:27:29,603 INFO L225 Difference]: With dead ends: 118 [2020-10-26 19:27:29,603 INFO L226 Difference]: Without dead ends: 101 [2020-10-26 19:27:29,604 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-10-26 19:27:29,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-26 19:27:29,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 100. [2020-10-26 19:27:29,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-10-26 19:27:29,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 103 transitions. [2020-10-26 19:27:29,609 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 103 transitions. Word has length 91 [2020-10-26 19:27:29,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:27:29,610 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 103 transitions. [2020-10-26 19:27:29,610 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-26 19:27:29,610 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 103 transitions. [2020-10-26 19:27:29,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-10-26 19:27:29,610 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:27:29,611 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:27:29,611 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-26 19:27:29,611 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:27:29,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:27:29,611 INFO L82 PathProgramCache]: Analyzing trace with hash -1317417731, now seen corresponding path program 38 times [2020-10-26 19:27:29,611 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:27:29,612 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [398241220] [2020-10-26 19:27:29,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:27:29,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:27:29,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:29,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:34,600 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:27:34,600 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 103 [2020-10-26 19:27:34,600 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:27:34,600 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4968 [2020-10-26 19:27:34,600 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:27:34,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-10-26 19:27:34,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:27:34,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-10-26 19:27:34,600 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:27:35,759 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:27:35,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:27:35,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:35,764 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:27:35,764 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:27:35,765 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:27:35,765 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:27:35,765 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:27:35,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:27:35,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:27:35,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:27:35,765 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:27:35,775 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:27:35,775 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [398241220] [2020-10-26 19:27:35,775 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:27:35,775 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-10-26 19:27:35,775 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774144182] [2020-10-26 19:27:35,775 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-10-26 19:27:35,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:27:35,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-10-26 19:27:35,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2020-10-26 19:27:35,777 INFO L87 Difference]: Start difference. First operand 100 states and 103 transitions. Second operand 42 states. [2020-10-26 19:27:36,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:27:36,137 INFO L93 Difference]: Finished difference Result 120 states and 126 transitions. [2020-10-26 19:27:36,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-26 19:27:36,138 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 93 [2020-10-26 19:27:36,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:27:36,139 INFO L225 Difference]: With dead ends: 120 [2020-10-26 19:27:36,139 INFO L226 Difference]: Without dead ends: 103 [2020-10-26 19:27:36,141 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2020-10-26 19:27:36,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-26 19:27:36,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 102. [2020-10-26 19:27:36,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-10-26 19:27:36,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 105 transitions. [2020-10-26 19:27:36,146 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 105 transitions. Word has length 93 [2020-10-26 19:27:36,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:27:36,146 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 105 transitions. [2020-10-26 19:27:36,146 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-10-26 19:27:36,146 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 105 transitions. [2020-10-26 19:27:36,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-10-26 19:27:36,148 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:27:36,148 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:27:36,148 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-26 19:27:36,148 INFO L429 AbstractCegarLoop]: === Iteration 41 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:27:36,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:27:36,149 INFO L82 PathProgramCache]: Analyzing trace with hash 657065691, now seen corresponding path program 39 times [2020-10-26 19:27:36,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:27:36,149 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1589493082] [2020-10-26 19:27:36,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:27:36,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:27:36,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:36,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:41,221 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:27:41,221 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 105 [2020-10-26 19:27:41,222 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:27:41,222 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5049 [2020-10-26 19:27:41,222 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:27:41,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 41 [2020-10-26 19:27:41,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:27:41,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-10-26 19:27:41,222 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:27:42,413 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:27:42,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:27:42,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:42,418 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:27:42,418 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:27:42,418 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:27:42,418 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:27:42,418 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:27:42,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:27:42,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:27:42,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:27:42,418 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:27:42,429 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:27:42,429 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1589493082] [2020-10-26 19:27:42,429 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:27:42,429 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-10-26 19:27:42,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133833684] [2020-10-26 19:27:42,430 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-10-26 19:27:42,430 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:27:42,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-10-26 19:27:42,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2020-10-26 19:27:42,431 INFO L87 Difference]: Start difference. First operand 102 states and 105 transitions. Second operand 43 states. [2020-10-26 19:27:42,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:27:42,729 INFO L93 Difference]: Finished difference Result 122 states and 128 transitions. [2020-10-26 19:27:42,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-26 19:27:42,730 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 95 [2020-10-26 19:27:42,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:27:42,731 INFO L225 Difference]: With dead ends: 122 [2020-10-26 19:27:42,731 INFO L226 Difference]: Without dead ends: 105 [2020-10-26 19:27:42,732 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2020-10-26 19:27:42,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-10-26 19:27:42,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 104. [2020-10-26 19:27:42,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-26 19:27:42,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 107 transitions. [2020-10-26 19:27:42,737 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 107 transitions. Word has length 95 [2020-10-26 19:27:42,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:27:42,738 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 107 transitions. [2020-10-26 19:27:42,738 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-10-26 19:27:42,738 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 107 transitions. [2020-10-26 19:27:42,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-10-26 19:27:42,738 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:27:42,739 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:27:42,739 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-26 19:27:42,739 INFO L429 AbstractCegarLoop]: === Iteration 42 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:27:42,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:27:42,739 INFO L82 PathProgramCache]: Analyzing trace with hash -239910599, now seen corresponding path program 40 times [2020-10-26 19:27:42,740 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:27:42,740 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [357993987] [2020-10-26 19:27:42,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:27:42,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:27:42,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:42,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:47,763 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:27:47,764 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 107 [2020-10-26 19:27:47,764 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:27:47,764 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-26 19:27:47,764 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:27:47,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 42 [2020-10-26 19:27:47,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:27:47,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-26 19:27:47,764 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:27:49,108 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:27:49,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:27:49,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:49,113 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:27:49,113 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:27:49,113 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:27:49,113 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:27:49,113 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:27:49,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:27:49,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:27:49,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:27:49,114 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:27:49,125 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:27:49,125 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [357993987] [2020-10-26 19:27:49,125 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:27:49,125 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-10-26 19:27:49,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709916453] [2020-10-26 19:27:49,126 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-10-26 19:27:49,126 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:27:49,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-10-26 19:27:49,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2020-10-26 19:27:49,127 INFO L87 Difference]: Start difference. First operand 104 states and 107 transitions. Second operand 44 states. [2020-10-26 19:27:49,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:27:49,419 INFO L93 Difference]: Finished difference Result 124 states and 130 transitions. [2020-10-26 19:27:49,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-26 19:27:49,420 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 97 [2020-10-26 19:27:49,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:27:49,421 INFO L225 Difference]: With dead ends: 124 [2020-10-26 19:27:49,421 INFO L226 Difference]: Without dead ends: 107 [2020-10-26 19:27:49,423 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2020-10-26 19:27:49,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-26 19:27:49,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 106. [2020-10-26 19:27:49,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-10-26 19:27:49,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 109 transitions. [2020-10-26 19:27:49,428 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 109 transitions. Word has length 97 [2020-10-26 19:27:49,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:27:49,428 INFO L481 AbstractCegarLoop]: Abstraction has 106 states and 109 transitions. [2020-10-26 19:27:49,428 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-10-26 19:27:49,428 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 109 transitions. [2020-10-26 19:27:49,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-10-26 19:27:49,429 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:27:49,429 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:27:49,429 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-26 19:27:49,429 INFO L429 AbstractCegarLoop]: === Iteration 43 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:27:49,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:27:49,430 INFO L82 PathProgramCache]: Analyzing trace with hash 1054301207, now seen corresponding path program 41 times [2020-10-26 19:27:49,430 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:27:49,430 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1271098035] [2020-10-26 19:27:49,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:27:49,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:27:49,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:49,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:54,451 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:27:54,451 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 109 [2020-10-26 19:27:54,452 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:27:54,452 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-26 19:27:54,452 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:27:54,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 43 [2020-10-26 19:27:54,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:27:54,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 84 [2020-10-26 19:27:54,452 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:27:55,771 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:27:55,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:27:55,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:55,777 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:27:55,778 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:27:55,778 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:27:55,778 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:27:55,778 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:27:55,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:27:55,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:27:55,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:27:55,778 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:27:55,788 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:27:55,788 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1271098035] [2020-10-26 19:27:55,788 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:27:55,788 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2020-10-26 19:27:55,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856552310] [2020-10-26 19:27:55,789 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-10-26 19:27:55,789 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:27:55,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-10-26 19:27:55,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2020-10-26 19:27:55,790 INFO L87 Difference]: Start difference. First operand 106 states and 109 transitions. Second operand 45 states. [2020-10-26 19:27:56,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:27:56,103 INFO L93 Difference]: Finished difference Result 126 states and 132 transitions. [2020-10-26 19:27:56,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-26 19:27:56,104 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 99 [2020-10-26 19:27:56,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:27:56,106 INFO L225 Difference]: With dead ends: 126 [2020-10-26 19:27:56,106 INFO L226 Difference]: Without dead ends: 109 [2020-10-26 19:27:56,107 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2020-10-26 19:27:56,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-26 19:27:56,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 108. [2020-10-26 19:27:56,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-10-26 19:27:56,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 111 transitions. [2020-10-26 19:27:56,112 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 111 transitions. Word has length 99 [2020-10-26 19:27:56,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:27:56,112 INFO L481 AbstractCegarLoop]: Abstraction has 108 states and 111 transitions. [2020-10-26 19:27:56,112 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-10-26 19:27:56,112 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 111 transitions. [2020-10-26 19:27:56,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-10-26 19:27:56,113 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:27:56,113 INFO L422 BasicCegarLoop]: trace histogram [42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:27:56,113 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-26 19:27:56,113 INFO L429 AbstractCegarLoop]: === Iteration 44 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:27:56,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:27:56,114 INFO L82 PathProgramCache]: Analyzing trace with hash -748669067, now seen corresponding path program 42 times [2020-10-26 19:27:56,114 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:27:56,114 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [195816078] [2020-10-26 19:27:56,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:27:56,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:27:56,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:56,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:01,132 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:28:01,132 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 111 [2020-10-26 19:28:01,132 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:28:01,132 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-26 19:28:01,132 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:28:01,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 44 [2020-10-26 19:28:01,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:28:01,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 86 [2020-10-26 19:28:01,133 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:28:02,519 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:28:02,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:28:02,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:02,525 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:28:02,525 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:28:02,525 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:28:02,526 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:28:02,526 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:28:02,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:28:02,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:28:02,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:28:02,526 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:28:02,536 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 0 proven. 1764 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:28:02,537 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [195816078] [2020-10-26 19:28:02,537 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:28:02,537 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2020-10-26 19:28:02,537 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433955035] [2020-10-26 19:28:02,537 INFO L461 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-10-26 19:28:02,537 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:28:02,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-10-26 19:28:02,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2020-10-26 19:28:02,539 INFO L87 Difference]: Start difference. First operand 108 states and 111 transitions. Second operand 46 states. [2020-10-26 19:28:02,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:28:02,912 INFO L93 Difference]: Finished difference Result 128 states and 134 transitions. [2020-10-26 19:28:02,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-26 19:28:02,913 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 101 [2020-10-26 19:28:02,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:28:02,914 INFO L225 Difference]: With dead ends: 128 [2020-10-26 19:28:02,914 INFO L226 Difference]: Without dead ends: 111 [2020-10-26 19:28:02,915 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2020-10-26 19:28:02,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-26 19:28:02,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 110. [2020-10-26 19:28:02,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-26 19:28:02,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 113 transitions. [2020-10-26 19:28:02,920 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 113 transitions. Word has length 101 [2020-10-26 19:28:02,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:28:02,920 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 113 transitions. [2020-10-26 19:28:02,921 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-10-26 19:28:02,921 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 113 transitions. [2020-10-26 19:28:02,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-10-26 19:28:02,921 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:28:02,921 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:28:02,922 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-26 19:28:02,922 INFO L429 AbstractCegarLoop]: === Iteration 45 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:28:02,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:28:02,922 INFO L82 PathProgramCache]: Analyzing trace with hash 1763685203, now seen corresponding path program 43 times [2020-10-26 19:28:02,922 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:28:02,922 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [688329177] [2020-10-26 19:28:02,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:28:02,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:28:02,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:02,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:07,965 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:28:07,965 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 113 [2020-10-26 19:28:07,965 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:28:07,965 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5021 [2020-10-26 19:28:07,965 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:28:07,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 45 [2020-10-26 19:28:07,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:28:07,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 88 [2020-10-26 19:28:07,965 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:28:09,451 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:28:09,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:28:09,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:09,457 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:28:09,457 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:28:09,457 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:28:09,457 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:28:09,457 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:28:09,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:28:09,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:28:09,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:28:09,458 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:28:09,468 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 0 proven. 1849 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:28:09,468 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [688329177] [2020-10-26 19:28:09,469 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:28:09,469 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2020-10-26 19:28:09,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539043707] [2020-10-26 19:28:09,469 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-10-26 19:28:09,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:28:09,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-10-26 19:28:09,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1037, Invalid=1125, Unknown=0, NotChecked=0, Total=2162 [2020-10-26 19:28:09,470 INFO L87 Difference]: Start difference. First operand 110 states and 113 transitions. Second operand 47 states. [2020-10-26 19:28:09,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:28:09,951 INFO L93 Difference]: Finished difference Result 130 states and 136 transitions. [2020-10-26 19:28:09,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-26 19:28:09,952 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 103 [2020-10-26 19:28:09,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:28:09,953 INFO L225 Difference]: With dead ends: 130 [2020-10-26 19:28:09,953 INFO L226 Difference]: Without dead ends: 113 [2020-10-26 19:28:09,954 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1037, Invalid=1125, Unknown=0, NotChecked=0, Total=2162 [2020-10-26 19:28:09,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-26 19:28:09,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 112. [2020-10-26 19:28:09,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-10-26 19:28:09,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 115 transitions. [2020-10-26 19:28:09,965 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 115 transitions. Word has length 103 [2020-10-26 19:28:09,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:28:09,965 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 115 transitions. [2020-10-26 19:28:09,965 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-10-26 19:28:09,965 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 115 transitions. [2020-10-26 19:28:09,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-10-26 19:28:09,966 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:28:09,966 INFO L422 BasicCegarLoop]: trace histogram [44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:28:09,966 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-26 19:28:09,966 INFO L429 AbstractCegarLoop]: === Iteration 46 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:28:09,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:28:09,967 INFO L82 PathProgramCache]: Analyzing trace with hash -1930448975, now seen corresponding path program 44 times [2020-10-26 19:28:09,967 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:28:09,967 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1468961939] [2020-10-26 19:28:09,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:28:09,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:28:10,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:10,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:15,008 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:28:15,008 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 115 [2020-10-26 19:28:15,009 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:28:15,009 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5019 [2020-10-26 19:28:15,009 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:28:15,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 46 [2020-10-26 19:28:15,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:28:15,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 90 [2020-10-26 19:28:15,009 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:28:16,559 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:28:16,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:28:16,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:16,565 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:28:16,565 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:28:16,565 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:28:16,566 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:28:16,566 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:28:16,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:28:16,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:28:16,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:28:16,566 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:28:16,598 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 0 proven. 1936 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:28:16,598 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1468961939] [2020-10-26 19:28:16,598 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:28:16,598 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2020-10-26 19:28:16,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010349911] [2020-10-26 19:28:16,599 INFO L461 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-10-26 19:28:16,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:28:16,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-10-26 19:28:16,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1083, Invalid=1173, Unknown=0, NotChecked=0, Total=2256 [2020-10-26 19:28:16,600 INFO L87 Difference]: Start difference. First operand 112 states and 115 transitions. Second operand 48 states. [2020-10-26 19:28:16,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:28:16,868 INFO L93 Difference]: Finished difference Result 132 states and 138 transitions. [2020-10-26 19:28:16,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-10-26 19:28:16,869 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 105 [2020-10-26 19:28:16,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:28:16,871 INFO L225 Difference]: With dead ends: 132 [2020-10-26 19:28:16,871 INFO L226 Difference]: Without dead ends: 115 [2020-10-26 19:28:16,872 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1083, Invalid=1173, Unknown=0, NotChecked=0, Total=2256 [2020-10-26 19:28:16,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-26 19:28:16,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 114. [2020-10-26 19:28:16,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-10-26 19:28:16,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 117 transitions. [2020-10-26 19:28:16,877 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 117 transitions. Word has length 105 [2020-10-26 19:28:16,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:28:16,877 INFO L481 AbstractCegarLoop]: Abstraction has 114 states and 117 transitions. [2020-10-26 19:28:16,877 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-10-26 19:28:16,877 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 117 transitions. [2020-10-26 19:28:16,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-10-26 19:28:16,878 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:28:16,878 INFO L422 BasicCegarLoop]: trace histogram [45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:28:16,878 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-26 19:28:16,879 INFO L429 AbstractCegarLoop]: === Iteration 47 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:28:16,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:28:16,879 INFO L82 PathProgramCache]: Analyzing trace with hash -55440241, now seen corresponding path program 45 times [2020-10-26 19:28:16,879 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:28:16,879 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [623836472] [2020-10-26 19:28:16,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:28:16,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:28:16,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:16,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:21,904 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:28:21,904 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 117 [2020-10-26 19:28:21,904 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:28:21,904 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-26 19:28:21,904 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:28:21,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 47 [2020-10-26 19:28:21,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:28:21,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 92 [2020-10-26 19:28:21,905 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:28:23,487 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:28:23,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:28:23,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:23,490 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:28:23,490 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:28:23,491 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:28:23,491 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:28:23,491 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:28:23,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:28:23,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:28:23,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:28:23,491 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:28:23,502 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 0 proven. 2025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:28:23,502 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [623836472] [2020-10-26 19:28:23,502 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:28:23,502 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2020-10-26 19:28:23,502 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058827573] [2020-10-26 19:28:23,503 INFO L461 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-10-26 19:28:23,503 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:28:23,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-10-26 19:28:23,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1130, Invalid=1222, Unknown=0, NotChecked=0, Total=2352 [2020-10-26 19:28:23,503 INFO L87 Difference]: Start difference. First operand 114 states and 117 transitions. Second operand 49 states. [2020-10-26 19:28:23,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:28:23,958 INFO L93 Difference]: Finished difference Result 134 states and 140 transitions. [2020-10-26 19:28:23,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-10-26 19:28:23,959 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 107 [2020-10-26 19:28:23,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:28:23,960 INFO L225 Difference]: With dead ends: 134 [2020-10-26 19:28:23,960 INFO L226 Difference]: Without dead ends: 117 [2020-10-26 19:28:23,961 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1130, Invalid=1222, Unknown=0, NotChecked=0, Total=2352 [2020-10-26 19:28:23,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-26 19:28:23,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 116. [2020-10-26 19:28:23,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-10-26 19:28:23,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 119 transitions. [2020-10-26 19:28:23,965 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 119 transitions. Word has length 107 [2020-10-26 19:28:23,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:28:23,966 INFO L481 AbstractCegarLoop]: Abstraction has 116 states and 119 transitions. [2020-10-26 19:28:23,966 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-10-26 19:28:23,966 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 119 transitions. [2020-10-26 19:28:23,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-10-26 19:28:23,966 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:28:23,966 INFO L422 BasicCegarLoop]: trace histogram [46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:28:23,967 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-26 19:28:23,967 INFO L429 AbstractCegarLoop]: === Iteration 48 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:28:23,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:28:23,968 INFO L82 PathProgramCache]: Analyzing trace with hash -2058311187, now seen corresponding path program 46 times [2020-10-26 19:28:23,968 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:28:23,968 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1005899686] [2020-10-26 19:28:23,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:28:23,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:28:24,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:24,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:29,013 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:28:29,013 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 119 [2020-10-26 19:28:29,013 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:28:29,013 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5022 [2020-10-26 19:28:29,013 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:28:29,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 48 [2020-10-26 19:28:29,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:28:29,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 94 [2020-10-26 19:28:29,014 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:28:30,693 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:28:30,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:28:30,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:30,697 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:28:30,697 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:28:30,697 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:28:30,698 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:28:30,698 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:28:30,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:28:30,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:28:30,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:28:30,698 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:28:30,709 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:28:30,710 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1005899686] [2020-10-26 19:28:30,710 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:28:30,710 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50] total 50 [2020-10-26 19:28:30,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475158030] [2020-10-26 19:28:30,710 INFO L461 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-10-26 19:28:30,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:28:30,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-10-26 19:28:30,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2020-10-26 19:28:30,711 INFO L87 Difference]: Start difference. First operand 116 states and 119 transitions. Second operand 50 states. [2020-10-26 19:28:31,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:28:31,035 INFO L93 Difference]: Finished difference Result 136 states and 142 transitions. [2020-10-26 19:28:31,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-10-26 19:28:31,035 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 109 [2020-10-26 19:28:31,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:28:31,037 INFO L225 Difference]: With dead ends: 136 [2020-10-26 19:28:31,037 INFO L226 Difference]: Without dead ends: 119 [2020-10-26 19:28:31,038 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2020-10-26 19:28:31,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-10-26 19:28:31,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 118. [2020-10-26 19:28:31,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-26 19:28:31,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 121 transitions. [2020-10-26 19:28:31,043 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 121 transitions. Word has length 109 [2020-10-26 19:28:31,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:28:31,044 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 121 transitions. [2020-10-26 19:28:31,044 INFO L482 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-10-26 19:28:31,044 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 121 transitions. [2020-10-26 19:28:31,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-10-26 19:28:31,044 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:28:31,044 INFO L422 BasicCegarLoop]: trace histogram [47, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:28:31,044 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-26 19:28:31,044 INFO L429 AbstractCegarLoop]: === Iteration 49 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:28:31,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:28:31,045 INFO L82 PathProgramCache]: Analyzing trace with hash 1623025611, now seen corresponding path program 47 times [2020-10-26 19:28:31,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:28:31,045 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1190341292] [2020-10-26 19:28:31,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:28:31,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:28:31,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:31,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:36,097 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:28:36,097 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 121 [2020-10-26 19:28:36,097 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:28:36,097 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5030 [2020-10-26 19:28:36,097 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:28:36,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 49 [2020-10-26 19:28:36,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:28:36,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 96 [2020-10-26 19:28:36,098 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:28:37,878 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:28:37,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:28:37,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:37,883 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:28:37,883 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:28:37,883 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:28:37,883 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:28:37,883 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:28:37,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:28:37,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:28:37,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:28:37,883 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:28:37,895 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 0 proven. 2209 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:28:37,895 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1190341292] [2020-10-26 19:28:37,896 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:28:37,896 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51] total 51 [2020-10-26 19:28:37,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996874587] [2020-10-26 19:28:37,896 INFO L461 AbstractCegarLoop]: Interpolant automaton has 51 states [2020-10-26 19:28:37,896 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:28:37,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2020-10-26 19:28:37,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1227, Invalid=1323, Unknown=0, NotChecked=0, Total=2550 [2020-10-26 19:28:37,897 INFO L87 Difference]: Start difference. First operand 118 states and 121 transitions. Second operand 51 states. [2020-10-26 19:28:38,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:28:38,389 INFO L93 Difference]: Finished difference Result 138 states and 144 transitions. [2020-10-26 19:28:38,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-10-26 19:28:38,389 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 111 [2020-10-26 19:28:38,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:28:38,390 INFO L225 Difference]: With dead ends: 138 [2020-10-26 19:28:38,390 INFO L226 Difference]: Without dead ends: 121 [2020-10-26 19:28:38,391 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1227, Invalid=1323, Unknown=0, NotChecked=0, Total=2550 [2020-10-26 19:28:38,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-26 19:28:38,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 120. [2020-10-26 19:28:38,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-26 19:28:38,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 123 transitions. [2020-10-26 19:28:38,396 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 123 transitions. Word has length 111 [2020-10-26 19:28:38,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:28:38,396 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 123 transitions. [2020-10-26 19:28:38,396 INFO L482 AbstractCegarLoop]: Interpolant automaton has 51 states. [2020-10-26 19:28:38,397 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 123 transitions. [2020-10-26 19:28:38,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-10-26 19:28:38,397 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:28:38,397 INFO L422 BasicCegarLoop]: trace histogram [48, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:28:38,398 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-10-26 19:28:38,398 INFO L429 AbstractCegarLoop]: === Iteration 50 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:28:38,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:28:38,398 INFO L82 PathProgramCache]: Analyzing trace with hash 334636585, now seen corresponding path program 48 times [2020-10-26 19:28:38,398 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:28:38,398 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [755608031] [2020-10-26 19:28:38,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:28:38,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:28:38,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:38,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:43,426 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:28:43,426 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 123 [2020-10-26 19:28:43,426 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:28:43,426 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-26 19:28:43,426 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:28:43,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 50 [2020-10-26 19:28:43,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:28:43,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 98 [2020-10-26 19:28:43,427 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:28:45,210 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:28:45,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:28:45,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:45,215 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:28:45,215 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:28:45,215 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:28:45,215 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:28:45,215 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:28:45,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:28:45,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:28:45,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:28:45,215 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:28:45,228 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:28:45,228 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [755608031] [2020-10-26 19:28:45,228 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:28:45,228 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52] total 52 [2020-10-26 19:28:45,228 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679539462] [2020-10-26 19:28:45,229 INFO L461 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-10-26 19:28:45,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:28:45,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-10-26 19:28:45,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1277, Invalid=1375, Unknown=0, NotChecked=0, Total=2652 [2020-10-26 19:28:45,230 INFO L87 Difference]: Start difference. First operand 120 states and 123 transitions. Second operand 52 states. [2020-10-26 19:28:45,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:28:45,757 INFO L93 Difference]: Finished difference Result 140 states and 146 transitions. [2020-10-26 19:28:45,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-10-26 19:28:45,758 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 113 [2020-10-26 19:28:45,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:28:45,759 INFO L225 Difference]: With dead ends: 140 [2020-10-26 19:28:45,759 INFO L226 Difference]: Without dead ends: 123 [2020-10-26 19:28:45,760 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1277, Invalid=1375, Unknown=0, NotChecked=0, Total=2652 [2020-10-26 19:28:45,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-10-26 19:28:45,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 122. [2020-10-26 19:28:45,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-10-26 19:28:45,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 125 transitions. [2020-10-26 19:28:45,765 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 125 transitions. Word has length 113 [2020-10-26 19:28:45,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:28:45,765 INFO L481 AbstractCegarLoop]: Abstraction has 122 states and 125 transitions. [2020-10-26 19:28:45,765 INFO L482 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-10-26 19:28:45,766 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 125 transitions. [2020-10-26 19:28:45,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-10-26 19:28:45,766 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:28:45,766 INFO L422 BasicCegarLoop]: trace histogram [49, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:28:45,767 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-10-26 19:28:45,767 INFO L429 AbstractCegarLoop]: === Iteration 51 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:28:45,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:28:45,767 INFO L82 PathProgramCache]: Analyzing trace with hash -856636153, now seen corresponding path program 49 times [2020-10-26 19:28:45,767 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:28:45,767 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [494320556] [2020-10-26 19:28:45,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:28:45,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:28:45,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:45,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:50,808 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:28:50,808 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 125 [2020-10-26 19:28:50,809 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:28:50,809 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5020 [2020-10-26 19:28:50,809 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:28:50,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 51 [2020-10-26 19:28:50,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:28:50,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 100 [2020-10-26 19:28:50,809 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:28:52,770 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:28:52,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:28:52,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:52,775 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:28:52,776 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:28:52,776 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:28:52,776 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:28:52,776 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:28:52,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:28:52,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:28:52,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:28:52,776 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:28:52,789 INFO L134 CoverageAnalysis]: Checked inductivity of 2401 backedges. 0 proven. 2401 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:28:52,790 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [494320556] [2020-10-26 19:28:52,790 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:28:52,790 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53] total 53 [2020-10-26 19:28:52,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965145482] [2020-10-26 19:28:52,790 INFO L461 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-10-26 19:28:52,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:28:52,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-10-26 19:28:52,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1328, Invalid=1428, Unknown=0, NotChecked=0, Total=2756 [2020-10-26 19:28:52,791 INFO L87 Difference]: Start difference. First operand 122 states and 125 transitions. Second operand 53 states. [2020-10-26 19:28:53,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:28:53,340 INFO L93 Difference]: Finished difference Result 142 states and 148 transitions. [2020-10-26 19:28:53,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-10-26 19:28:53,341 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 115 [2020-10-26 19:28:53,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:28:53,343 INFO L225 Difference]: With dead ends: 142 [2020-10-26 19:28:53,343 INFO L226 Difference]: Without dead ends: 125 [2020-10-26 19:28:53,343 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1328, Invalid=1428, Unknown=0, NotChecked=0, Total=2756 [2020-10-26 19:28:53,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-10-26 19:28:53,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 124. [2020-10-26 19:28:53,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-10-26 19:28:53,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 127 transitions. [2020-10-26 19:28:53,348 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 127 transitions. Word has length 115 [2020-10-26 19:28:53,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:28:53,349 INFO L481 AbstractCegarLoop]: Abstraction has 124 states and 127 transitions. [2020-10-26 19:28:53,349 INFO L482 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-10-26 19:28:53,349 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 127 transitions. [2020-10-26 19:28:53,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-10-26 19:28:53,351 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:28:53,351 INFO L422 BasicCegarLoop]: trace histogram [50, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:28:53,351 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-10-26 19:28:53,351 INFO L429 AbstractCegarLoop]: === Iteration 52 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:28:53,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:28:53,352 INFO L82 PathProgramCache]: Analyzing trace with hash 1086530661, now seen corresponding path program 50 times [2020-10-26 19:28:53,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:28:53,352 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [367096676] [2020-10-26 19:28:53,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:28:53,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:28:53,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:53,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:58,412 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:28:58,412 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 127 [2020-10-26 19:28:58,412 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:28:58,412 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5036 [2020-10-26 19:28:58,413 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:28:58,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 52 [2020-10-26 19:28:58,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:28:58,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 102 [2020-10-26 19:28:58,413 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:29:00,383 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:29:00,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:29:00,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:00,390 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:29:00,390 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:29:00,390 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:29:00,390 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:29:00,390 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:29:00,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:29:00,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:29:00,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:29:00,390 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:29:00,403 INFO L134 CoverageAnalysis]: Checked inductivity of 2500 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:29:00,403 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [367096676] [2020-10-26 19:29:00,403 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:29:00,403 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54] total 54 [2020-10-26 19:29:00,403 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51289739] [2020-10-26 19:29:00,404 INFO L461 AbstractCegarLoop]: Interpolant automaton has 54 states [2020-10-26 19:29:00,404 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:29:00,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2020-10-26 19:29:00,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2020-10-26 19:29:00,404 INFO L87 Difference]: Start difference. First operand 124 states and 127 transitions. Second operand 54 states. [2020-10-26 19:29:00,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:29:00,954 INFO L93 Difference]: Finished difference Result 144 states and 150 transitions. [2020-10-26 19:29:00,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-10-26 19:29:00,955 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 117 [2020-10-26 19:29:00,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:29:00,957 INFO L225 Difference]: With dead ends: 144 [2020-10-26 19:29:00,957 INFO L226 Difference]: Without dead ends: 127 [2020-10-26 19:29:00,957 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2020-10-26 19:29:00,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-10-26 19:29:00,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 126. [2020-10-26 19:29:00,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-10-26 19:29:00,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 129 transitions. [2020-10-26 19:29:00,966 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 129 transitions. Word has length 117 [2020-10-26 19:29:00,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:29:00,966 INFO L481 AbstractCegarLoop]: Abstraction has 126 states and 129 transitions. [2020-10-26 19:29:00,966 INFO L482 AbstractCegarLoop]: Interpolant automaton has 54 states. [2020-10-26 19:29:00,966 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 129 transitions. [2020-10-26 19:29:00,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2020-10-26 19:29:00,967 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:29:00,967 INFO L422 BasicCegarLoop]: trace histogram [51, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:29:00,967 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-10-26 19:29:00,967 INFO L429 AbstractCegarLoop]: === Iteration 53 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:29:00,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:29:00,968 INFO L82 PathProgramCache]: Analyzing trace with hash 159065155, now seen corresponding path program 51 times [2020-10-26 19:29:00,968 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:29:00,968 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1613935074] [2020-10-26 19:29:00,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:29:00,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:29:01,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:01,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:06,019 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:29:06,019 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 129 [2020-10-26 19:29:06,019 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:29:06,019 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5028 [2020-10-26 19:29:06,019 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:29:06,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 53 [2020-10-26 19:29:06,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:29:06,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 104 [2020-10-26 19:29:06,020 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:29:08,048 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:29:08,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:29:08,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:08,053 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:29:08,053 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:29:08,053 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:29:08,053 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:29:08,053 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:29:08,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:29:08,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:29:08,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:29:08,054 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:29:08,066 INFO L134 CoverageAnalysis]: Checked inductivity of 2601 backedges. 0 proven. 2601 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:29:08,067 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1613935074] [2020-10-26 19:29:08,067 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:29:08,067 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55] total 55 [2020-10-26 19:29:08,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119791499] [2020-10-26 19:29:08,067 INFO L461 AbstractCegarLoop]: Interpolant automaton has 55 states [2020-10-26 19:29:08,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:29:08,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2020-10-26 19:29:08,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1433, Invalid=1537, Unknown=0, NotChecked=0, Total=2970 [2020-10-26 19:29:08,068 INFO L87 Difference]: Start difference. First operand 126 states and 129 transitions. Second operand 55 states. [2020-10-26 19:29:08,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:29:08,621 INFO L93 Difference]: Finished difference Result 146 states and 152 transitions. [2020-10-26 19:29:08,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-10-26 19:29:08,622 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 119 [2020-10-26 19:29:08,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:29:08,624 INFO L225 Difference]: With dead ends: 146 [2020-10-26 19:29:08,624 INFO L226 Difference]: Without dead ends: 129 [2020-10-26 19:29:08,625 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1433, Invalid=1537, Unknown=0, NotChecked=0, Total=2970 [2020-10-26 19:29:08,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-10-26 19:29:08,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 128. [2020-10-26 19:29:08,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2020-10-26 19:29:08,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 131 transitions. [2020-10-26 19:29:08,629 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 131 transitions. Word has length 119 [2020-10-26 19:29:08,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:29:08,629 INFO L481 AbstractCegarLoop]: Abstraction has 128 states and 131 transitions. [2020-10-26 19:29:08,629 INFO L482 AbstractCegarLoop]: Interpolant automaton has 55 states. [2020-10-26 19:29:08,629 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 131 transitions. [2020-10-26 19:29:08,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-10-26 19:29:08,630 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:29:08,630 INFO L422 BasicCegarLoop]: trace histogram [52, 52, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:29:08,630 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-10-26 19:29:08,631 INFO L429 AbstractCegarLoop]: === Iteration 54 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:29:08,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:29:08,631 INFO L82 PathProgramCache]: Analyzing trace with hash -2077055839, now seen corresponding path program 52 times [2020-10-26 19:29:08,631 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:29:08,631 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1412699942] [2020-10-26 19:29:08,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:29:08,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:29:08,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:08,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:13,703 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:29:13,703 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 131 [2020-10-26 19:29:13,703 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:29:13,703 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5048 [2020-10-26 19:29:13,704 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:29:13,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 54 [2020-10-26 19:29:13,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:29:13,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 106 [2020-10-26 19:29:13,704 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:29:15,805 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:29:15,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:29:15,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:15,809 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:29:15,809 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:29:15,809 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:29:15,809 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:29:15,809 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:29:15,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:29:15,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:29:15,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:29:15,809 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:29:15,824 INFO L134 CoverageAnalysis]: Checked inductivity of 2704 backedges. 0 proven. 2704 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:29:15,824 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1412699942] [2020-10-26 19:29:15,824 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:29:15,824 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56] total 56 [2020-10-26 19:29:15,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478435944] [2020-10-26 19:29:15,824 INFO L461 AbstractCegarLoop]: Interpolant automaton has 56 states [2020-10-26 19:29:15,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:29:15,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2020-10-26 19:29:15,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1487, Invalid=1593, Unknown=0, NotChecked=0, Total=3080 [2020-10-26 19:29:15,826 INFO L87 Difference]: Start difference. First operand 128 states and 131 transitions. Second operand 56 states. [2020-10-26 19:29:16,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:29:16,388 INFO L93 Difference]: Finished difference Result 148 states and 154 transitions. [2020-10-26 19:29:16,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-10-26 19:29:16,389 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 121 [2020-10-26 19:29:16,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:29:16,390 INFO L225 Difference]: With dead ends: 148 [2020-10-26 19:29:16,390 INFO L226 Difference]: Without dead ends: 131 [2020-10-26 19:29:16,391 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1487, Invalid=1593, Unknown=0, NotChecked=0, Total=3080 [2020-10-26 19:29:16,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-10-26 19:29:16,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 130. [2020-10-26 19:29:16,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-10-26 19:29:16,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 133 transitions. [2020-10-26 19:29:16,395 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 133 transitions. Word has length 121 [2020-10-26 19:29:16,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:29:16,395 INFO L481 AbstractCegarLoop]: Abstraction has 130 states and 133 transitions. [2020-10-26 19:29:16,396 INFO L482 AbstractCegarLoop]: Interpolant automaton has 56 states. [2020-10-26 19:29:16,396 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 133 transitions. [2020-10-26 19:29:16,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2020-10-26 19:29:16,396 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:29:16,396 INFO L422 BasicCegarLoop]: trace histogram [53, 53, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:29:16,396 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2020-10-26 19:29:16,397 INFO L429 AbstractCegarLoop]: === Iteration 55 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:29:16,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:29:16,397 INFO L82 PathProgramCache]: Analyzing trace with hash 789284223, now seen corresponding path program 53 times [2020-10-26 19:29:16,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:29:16,397 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1816134688] [2020-10-26 19:29:16,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:29:16,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:29:16,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:16,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:21,459 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:29:21,460 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 133 [2020-10-26 19:29:21,460 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:29:21,460 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5045 [2020-10-26 19:29:21,460 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:29:21,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 55 [2020-10-26 19:29:21,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:29:21,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 108 [2020-10-26 19:29:21,460 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:29:23,630 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:29:23,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:29:23,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:23,635 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:29:23,635 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:29:23,635 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:29:23,635 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:29:23,636 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:29:23,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:29:23,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:29:23,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:29:23,636 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:29:23,650 INFO L134 CoverageAnalysis]: Checked inductivity of 2809 backedges. 0 proven. 2809 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:29:23,650 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1816134688] [2020-10-26 19:29:23,650 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:29:23,651 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57] total 57 [2020-10-26 19:29:23,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397200144] [2020-10-26 19:29:23,651 INFO L461 AbstractCegarLoop]: Interpolant automaton has 57 states [2020-10-26 19:29:23,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:29:23,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2020-10-26 19:29:23,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1542, Invalid=1650, Unknown=0, NotChecked=0, Total=3192 [2020-10-26 19:29:23,652 INFO L87 Difference]: Start difference. First operand 130 states and 133 transitions. Second operand 57 states. [2020-10-26 19:29:24,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:29:24,135 INFO L93 Difference]: Finished difference Result 150 states and 156 transitions. [2020-10-26 19:29:24,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-10-26 19:29:24,136 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 123 [2020-10-26 19:29:24,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:29:24,137 INFO L225 Difference]: With dead ends: 150 [2020-10-26 19:29:24,137 INFO L226 Difference]: Without dead ends: 133 [2020-10-26 19:29:24,138 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1542, Invalid=1650, Unknown=0, NotChecked=0, Total=3192 [2020-10-26 19:29:24,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-10-26 19:29:24,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 132. [2020-10-26 19:29:24,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-10-26 19:29:24,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 135 transitions. [2020-10-26 19:29:24,142 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 135 transitions. Word has length 123 [2020-10-26 19:29:24,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:29:24,142 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 135 transitions. [2020-10-26 19:29:24,142 INFO L482 AbstractCegarLoop]: Interpolant automaton has 57 states. [2020-10-26 19:29:24,142 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 135 transitions. [2020-10-26 19:29:24,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2020-10-26 19:29:24,143 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:29:24,143 INFO L422 BasicCegarLoop]: trace histogram [54, 54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:29:24,143 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2020-10-26 19:29:24,143 INFO L429 AbstractCegarLoop]: === Iteration 56 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:29:24,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:29:24,144 INFO L82 PathProgramCache]: Analyzing trace with hash -2026920227, now seen corresponding path program 54 times [2020-10-26 19:29:24,144 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:29:24,144 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1195881456] [2020-10-26 19:29:24,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:29:24,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:29:24,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:24,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:29,172 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:29:29,172 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 135 [2020-10-26 19:29:29,172 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:29:29,172 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-26 19:29:29,172 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:29:29,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 56 [2020-10-26 19:29:29,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:29:29,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 110 [2020-10-26 19:29:29,172 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:29:31,438 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:29:31,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:29:31,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:31,443 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:29:31,444 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:29:31,444 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:29:31,444 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:29:31,444 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:29:31,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:29:31,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:29:31,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:29:31,444 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:29:31,458 INFO L134 CoverageAnalysis]: Checked inductivity of 2916 backedges. 0 proven. 2916 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:29:31,458 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1195881456] [2020-10-26 19:29:31,458 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:29:31,458 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58] total 58 [2020-10-26 19:29:31,459 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177575238] [2020-10-26 19:29:31,459 INFO L461 AbstractCegarLoop]: Interpolant automaton has 58 states [2020-10-26 19:29:31,459 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:29:31,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2020-10-26 19:29:31,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1598, Invalid=1708, Unknown=0, NotChecked=0, Total=3306 [2020-10-26 19:29:31,460 INFO L87 Difference]: Start difference. First operand 132 states and 135 transitions. Second operand 58 states. [2020-10-26 19:29:31,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:29:31,778 INFO L93 Difference]: Finished difference Result 152 states and 158 transitions. [2020-10-26 19:29:31,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2020-10-26 19:29:31,778 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 125 [2020-10-26 19:29:31,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:29:31,780 INFO L225 Difference]: With dead ends: 152 [2020-10-26 19:29:31,780 INFO L226 Difference]: Without dead ends: 135 [2020-10-26 19:29:31,780 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1598, Invalid=1708, Unknown=0, NotChecked=0, Total=3306 [2020-10-26 19:29:31,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-10-26 19:29:31,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 134. [2020-10-26 19:29:31,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-10-26 19:29:31,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 137 transitions. [2020-10-26 19:29:31,785 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 137 transitions. Word has length 125 [2020-10-26 19:29:31,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:29:31,786 INFO L481 AbstractCegarLoop]: Abstraction has 134 states and 137 transitions. [2020-10-26 19:29:31,786 INFO L482 AbstractCegarLoop]: Interpolant automaton has 58 states. [2020-10-26 19:29:31,786 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 137 transitions. [2020-10-26 19:29:31,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-10-26 19:29:31,787 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:29:31,787 INFO L422 BasicCegarLoop]: trace histogram [55, 55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:29:31,787 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2020-10-26 19:29:31,787 INFO L429 AbstractCegarLoop]: === Iteration 57 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:29:31,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:29:31,788 INFO L82 PathProgramCache]: Analyzing trace with hash 1724967099, now seen corresponding path program 55 times [2020-10-26 19:29:31,788 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:29:31,788 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [801117809] [2020-10-26 19:29:31,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:29:31,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:29:31,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:31,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:36,820 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:29:36,820 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 137 [2020-10-26 19:29:36,820 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:29:36,820 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-26 19:29:36,820 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:29:36,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 57 [2020-10-26 19:29:36,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:29:36,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 112 [2020-10-26 19:29:36,820 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:29:39,153 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:29:39,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:29:39,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:39,157 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:29:39,158 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:29:39,158 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:29:39,158 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:29:39,158 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:29:39,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:29:39,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:29:39,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:29:39,158 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:29:39,181 INFO L134 CoverageAnalysis]: Checked inductivity of 3025 backedges. 0 proven. 3025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:29:39,181 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [801117809] [2020-10-26 19:29:39,181 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:29:39,181 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59] total 59 [2020-10-26 19:29:39,181 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773720077] [2020-10-26 19:29:39,182 INFO L461 AbstractCegarLoop]: Interpolant automaton has 59 states [2020-10-26 19:29:39,182 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:29:39,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2020-10-26 19:29:39,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1655, Invalid=1767, Unknown=0, NotChecked=0, Total=3422 [2020-10-26 19:29:39,183 INFO L87 Difference]: Start difference. First operand 134 states and 137 transitions. Second operand 59 states. [2020-10-26 19:29:39,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:29:39,800 INFO L93 Difference]: Finished difference Result 154 states and 160 transitions. [2020-10-26 19:29:39,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2020-10-26 19:29:39,801 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 127 [2020-10-26 19:29:39,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:29:39,802 INFO L225 Difference]: With dead ends: 154 [2020-10-26 19:29:39,802 INFO L226 Difference]: Without dead ends: 137 [2020-10-26 19:29:39,803 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1655, Invalid=1767, Unknown=0, NotChecked=0, Total=3422 [2020-10-26 19:29:39,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-10-26 19:29:39,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 136. [2020-10-26 19:29:39,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-10-26 19:29:39,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 139 transitions. [2020-10-26 19:29:39,808 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 139 transitions. Word has length 127 [2020-10-26 19:29:39,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:29:39,808 INFO L481 AbstractCegarLoop]: Abstraction has 136 states and 139 transitions. [2020-10-26 19:29:39,809 INFO L482 AbstractCegarLoop]: Interpolant automaton has 59 states. [2020-10-26 19:29:39,809 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 139 transitions. [2020-10-26 19:29:39,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-10-26 19:29:39,809 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:29:39,810 INFO L422 BasicCegarLoop]: trace histogram [56, 56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:29:39,810 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2020-10-26 19:29:39,810 INFO L429 AbstractCegarLoop]: === Iteration 58 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:29:39,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:29:39,810 INFO L82 PathProgramCache]: Analyzing trace with hash -483841255, now seen corresponding path program 56 times [2020-10-26 19:29:39,811 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:29:39,811 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [985667554] [2020-10-26 19:29:39,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:29:39,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:29:39,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:39,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:44,858 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:29:44,858 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 139 [2020-10-26 19:29:44,858 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:29:44,858 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5022 [2020-10-26 19:29:44,858 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:29:44,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 58 [2020-10-26 19:29:44,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:29:44,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 114 [2020-10-26 19:29:44,858 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:29:47,292 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:29:47,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:29:47,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:47,297 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:29:47,297 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:29:47,297 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:29:47,297 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:29:47,297 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:29:47,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:29:47,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:29:47,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:29:47,297 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:29:47,313 INFO L134 CoverageAnalysis]: Checked inductivity of 3136 backedges. 0 proven. 3136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:29:47,313 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [985667554] [2020-10-26 19:29:47,313 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:29:47,313 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60] total 60 [2020-10-26 19:29:47,313 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313605639] [2020-10-26 19:29:47,314 INFO L461 AbstractCegarLoop]: Interpolant automaton has 60 states [2020-10-26 19:29:47,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:29:47,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2020-10-26 19:29:47,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1713, Invalid=1827, Unknown=0, NotChecked=0, Total=3540 [2020-10-26 19:29:47,315 INFO L87 Difference]: Start difference. First operand 136 states and 139 transitions. Second operand 60 states. [2020-10-26 19:29:47,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:29:47,921 INFO L93 Difference]: Finished difference Result 156 states and 162 transitions. [2020-10-26 19:29:47,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2020-10-26 19:29:47,921 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 129 [2020-10-26 19:29:47,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:29:47,923 INFO L225 Difference]: With dead ends: 156 [2020-10-26 19:29:47,923 INFO L226 Difference]: Without dead ends: 139 [2020-10-26 19:29:47,924 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1713, Invalid=1827, Unknown=0, NotChecked=0, Total=3540 [2020-10-26 19:29:47,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-10-26 19:29:47,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 138. [2020-10-26 19:29:47,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-10-26 19:29:47,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 141 transitions. [2020-10-26 19:29:47,929 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 141 transitions. Word has length 129 [2020-10-26 19:29:47,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:29:47,929 INFO L481 AbstractCegarLoop]: Abstraction has 138 states and 141 transitions. [2020-10-26 19:29:47,929 INFO L482 AbstractCegarLoop]: Interpolant automaton has 60 states. [2020-10-26 19:29:47,930 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 141 transitions. [2020-10-26 19:29:47,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-10-26 19:29:47,930 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:29:47,930 INFO L422 BasicCegarLoop]: trace histogram [57, 57, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:29:47,931 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2020-10-26 19:29:47,931 INFO L429 AbstractCegarLoop]: === Iteration 59 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:29:47,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:29:47,931 INFO L82 PathProgramCache]: Analyzing trace with hash -1434825225, now seen corresponding path program 57 times [2020-10-26 19:29:47,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:29:47,931 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1415307181] [2020-10-26 19:29:47,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:29:47,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:29:47,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:48,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:52,978 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:29:52,978 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 141 [2020-10-26 19:29:52,978 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:29:52,978 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5019 [2020-10-26 19:29:52,978 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:29:52,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 59 [2020-10-26 19:29:52,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:29:52,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 116 [2020-10-26 19:29:52,979 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0