/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=DEEPEST --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/loop-acceleration/array_4.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 20:11:39,077 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 20:11:39,080 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 20:11:39,117 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 20:11:39,118 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 20:11:39,120 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 20:11:39,121 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 20:11:39,124 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 20:11:39,126 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 20:11:39,148 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 20:11:39,149 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 20:11:39,150 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 20:11:39,151 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 20:11:39,154 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 20:11:39,157 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 20:11:39,159 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 20:11:39,161 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 20:11:39,165 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 20:11:39,169 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 20:11:39,174 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 20:11:39,177 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 20:11:39,182 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 20:11:39,184 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 20:11:39,185 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 20:11:39,190 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 20:11:39,192 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 20:11:39,192 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 20:11:39,194 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 20:11:39,194 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 20:11:39,198 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 20:11:39,199 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 20:11:39,200 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 20:11:39,201 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 20:11:39,201 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 20:11:39,203 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 20:11:39,204 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 20:11:39,205 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 20:11:39,205 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 20:11:39,206 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 20:11:39,207 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 20:11:39,208 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 20:11:39,209 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 [2020-10-27 20:11:39,265 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 20:11:39,266 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 20:11:39,270 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 20:11:39,270 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 20:11:39,270 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 20:11:39,271 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 20:11:39,271 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 20:11:39,271 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 20:11:39,271 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 20:11:39,272 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 20:11:39,273 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 20:11:39,273 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 20:11:39,273 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 20:11:39,273 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 20:11:39,274 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 20:11:39,274 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 20:11:39,274 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 20:11:39,274 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 20:11:39,275 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 20:11:39,276 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 20:11:39,276 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 20:11:39,282 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 20:11:39,282 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 20:11:39,282 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 20:11:39,283 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 20:11:39,283 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 20:11:39,283 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 20:11:39,283 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 20:11:39,284 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 20:11:39,284 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 20:11:39,690 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 20:11:39,716 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 20:11:39,719 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 20:11:39,721 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 20:11:39,721 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 20:11:39,723 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/array_4.i [2020-10-27 20:11:39,813 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d98e5b569/dc36263952984f0592e62a1af8ae3f14/FLAG9abde60cc [2020-10-27 20:11:40,440 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 20:11:40,441 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-acceleration/array_4.i [2020-10-27 20:11:40,448 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d98e5b569/dc36263952984f0592e62a1af8ae3f14/FLAG9abde60cc [2020-10-27 20:11:40,792 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d98e5b569/dc36263952984f0592e62a1af8ae3f14 [2020-10-27 20:11:40,798 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 20:11:40,806 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 20:11:40,810 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 20:11:40,810 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 20:11:40,815 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 20:11:40,816 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 08:11:40" (1/1) ... [2020-10-27 20:11:40,825 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2802ec41 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:11:40, skipping insertion in model container [2020-10-27 20:11:40,825 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 08:11:40" (1/1) ... [2020-10-27 20:11:40,836 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 20:11:40,857 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 20:11:41,046 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 20:11:41,056 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 20:11:41,077 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 20:11:41,096 INFO L208 MainTranslator]: Completed translation [2020-10-27 20:11:41,096 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:11:41 WrapperNode [2020-10-27 20:11:41,097 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 20:11:41,098 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 20:11:41,098 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 20:11:41,098 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 20:11:41,112 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:11:41" (1/1) ... [2020-10-27 20:11:41,112 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:11:41" (1/1) ... [2020-10-27 20:11:41,121 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:11:41" (1/1) ... [2020-10-27 20:11:41,122 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:11:41" (1/1) ... [2020-10-27 20:11:41,129 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:11:41" (1/1) ... [2020-10-27 20:11:41,134 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:11:41" (1/1) ... [2020-10-27 20:11:41,136 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:11:41" (1/1) ... [2020-10-27 20:11:41,145 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 20:11:41,146 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 20:11:41,146 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 20:11:41,147 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 20:11:41,148 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:11:41" (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 [2020-10-27 20:11:41,240 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 20:11:41,240 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 20:11:41,241 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 20:11:41,241 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-27 20:11:41,242 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 20:11:41,242 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 20:11:41,242 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 20:11:41,243 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-27 20:11:41,243 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-27 20:11:41,243 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 20:11:41,244 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 20:11:41,245 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 20:11:41,245 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-27 20:11:41,245 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 20:11:41,245 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 20:11:41,246 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 20:11:41,246 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 20:11:41,247 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 20:11:41,247 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 20:11:41,247 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 20:11:41,818 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 20:11:41,819 INFO L298 CfgBuilder]: Removed 2 assume(true) statements. [2020-10-27 20:11:41,820 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 08:11:41 BoogieIcfgContainer [2020-10-27 20:11:41,821 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 20:11:41,825 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 20:11:41,826 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 20:11:41,830 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 20:11:41,830 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 08:11:40" (1/3) ... [2020-10-27 20:11:41,831 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@388df266 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 08:11:41, skipping insertion in model container [2020-10-27 20:11:41,832 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:11:41" (2/3) ... [2020-10-27 20:11:41,833 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@388df266 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 08:11:41, skipping insertion in model container [2020-10-27 20:11:41,834 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 08:11:41" (3/3) ... [2020-10-27 20:11:41,836 INFO L111 eAbstractionObserver]: Analyzing ICFG array_4.i [2020-10-27 20:11:41,850 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 20:11:41,856 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 20:11:41,877 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 20:11:41,927 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 20:11:41,928 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 20:11:41,928 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 20:11:41,928 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 20:11:41,928 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 20:11:41,928 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 20:11:41,929 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 20:11:41,929 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 20:11:41,955 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2020-10-27 20:11:41,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-27 20:11:41,969 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:11:41,971 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:11:41,971 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:11:41,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:11:41,980 INFO L82 PathProgramCache]: Analyzing trace with hash 385493721, now seen corresponding path program 1 times [2020-10-27 20:11:41,991 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:11:41,992 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1560947996] [2020-10-27 20:11:41,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:11:42,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:11:42,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:11:42,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:11:42,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:11:42,621 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:11:42,621 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-27 20:11:42,622 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:11:42,622 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 459 [2020-10-27 20:11:42,626 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:11:42,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:11:42,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 20:11:42,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:11:42,627 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-27 20:11:42,754 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:11:42,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:11:42,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:11:42,768 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:11:42,769 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:11:42,769 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:11:42,769 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 20:11:42,769 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:11:42,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:11:42,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:11:42,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:11:42,770 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:11:42,779 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:11:42,780 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1560947996] [2020-10-27 20:11:42,782 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:11:42,783 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-27 20:11:42,784 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143594105] [2020-10-27 20:11:42,793 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-27 20:11:42,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:11:42,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-27 20:11:42,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-27 20:11:42,811 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 3 states. [2020-10-27 20:11:42,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:11:42,889 INFO L93 Difference]: Finished difference Result 47 states and 57 transitions. [2020-10-27 20:11:42,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-27 20:11:42,891 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2020-10-27 20:11:42,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:11:42,899 INFO L225 Difference]: With dead ends: 47 [2020-10-27 20:11:42,899 INFO L226 Difference]: Without dead ends: 19 [2020-10-27 20:11:42,903 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 [2020-10-27 20:11:42,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-10-27 20:11:42,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-10-27 20:11:42,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-10-27 20:11:42,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2020-10-27 20:11:42,946 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 15 [2020-10-27 20:11:42,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:11:42,947 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2020-10-27 20:11:42,947 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-27 20:11:42,947 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2020-10-27 20:11:42,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-27 20:11:42,948 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:11:42,949 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:11:42,949 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 20:11:42,949 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:11:42,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:11:42,950 INFO L82 PathProgramCache]: Analyzing trace with hash -436912548, now seen corresponding path program 1 times [2020-10-27 20:11:42,951 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:11:42,951 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [919982529] [2020-10-27 20:11:42,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:11:42,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:11:42,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:11:42,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:11:43,217 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:11:43,217 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-27 20:11:43,217 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:11:43,218 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 249 [2020-10-27 20:11:43,218 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:11:43,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 20:11:43,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:11:43,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-27 20:11:43,219 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:11:43,302 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:11:43,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:11:43,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:11:43,313 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:11:43,314 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:11:43,314 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:11:43,314 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 20:11:43,314 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:11:43,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:11:43,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:11:43,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:11:43,315 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 20:11:43,321 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:11:43,322 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [919982529] [2020-10-27 20:11:43,322 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:11:43,323 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 20:11:43,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060426519] [2020-10-27 20:11:43,325 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 20:11:43,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:11:43,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 20:11:43,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 20:11:43,327 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand 6 states. [2020-10-27 20:11:43,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:11:43,497 INFO L93 Difference]: Finished difference Result 31 states and 33 transitions. [2020-10-27 20:11:43,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 20:11:43,498 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2020-10-27 20:11:43,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:11:43,499 INFO L225 Difference]: With dead ends: 31 [2020-10-27 20:11:43,499 INFO L226 Difference]: Without dead ends: 24 [2020-10-27 20:11:43,501 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-27 20:11:43,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-10-27 20:11:43,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 21. [2020-10-27 20:11:43,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-10-27 20:11:43,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-10-27 20:11:43,509 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 16 [2020-10-27 20:11:43,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:11:43,509 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-10-27 20:11:43,509 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 20:11:43,509 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-10-27 20:11:43,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-27 20:11:43,510 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:11:43,510 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:11:43,511 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 20:11:43,511 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:11:43,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:11:43,512 INFO L82 PathProgramCache]: Analyzing trace with hash 1644935087, now seen corresponding path program 1 times [2020-10-27 20:11:43,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:11:43,512 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2034858801] [2020-10-27 20:11:43,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:11:43,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:11:43,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:11:43,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:11:43,729 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:11:43,729 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-27 20:11:43,730 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:11:43,730 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 205 [2020-10-27 20:11:43,730 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:11:43,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 20:11:43,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:11:43,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-27 20:11:43,731 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 20:11:43,852 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:11:43,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:11:43,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:11:43,865 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:11:43,865 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:11:43,865 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:11:43,865 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 20:11:43,866 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:11:43,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:11:43,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:11:43,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:11:43,866 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:11:43,873 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:11:43,873 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2034858801] [2020-10-27 20:11:43,874 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:11:43,874 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 20:11:43,874 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853988226] [2020-10-27 20:11:43,875 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 20:11:43,875 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:11:43,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 20:11:43,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-27 20:11:43,880 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 7 states. [2020-10-27 20:11:44,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:11:44,075 INFO L93 Difference]: Finished difference Result 45 states and 49 transitions. [2020-10-27 20:11:44,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 20:11:44,076 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 19 [2020-10-27 20:11:44,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:11:44,077 INFO L225 Difference]: With dead ends: 45 [2020-10-27 20:11:44,078 INFO L226 Difference]: Without dead ends: 29 [2020-10-27 20:11:44,079 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-10-27 20:11:44,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-27 20:11:44,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 25. [2020-10-27 20:11:44,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-27 20:11:44,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2020-10-27 20:11:44,099 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 19 [2020-10-27 20:11:44,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:11:44,099 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2020-10-27 20:11:44,099 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 20:11:44,100 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2020-10-27 20:11:44,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-27 20:11:44,101 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:11:44,101 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:11:44,101 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 20:11:44,101 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:11:44,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:11:44,102 INFO L82 PathProgramCache]: Analyzing trace with hash 1673697374, now seen corresponding path program 1 times [2020-10-27 20:11:44,102 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:11:44,103 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1476849623] [2020-10-27 20:11:44,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:11:44,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:11:44,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:11:44,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:11:44,494 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:11:44,494 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-27 20:11:44,494 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:11:44,494 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 369 [2020-10-27 20:11:44,495 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:11:44,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 20:11:44,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-27 20:11:44,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 20:11:44,495 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:11:44,572 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:11:44,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:11:44,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:11:44,582 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:11:44,582 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:11:44,582 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:11:44,582 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 20:11:44,582 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:11:44,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:11:44,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:11:44,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:11:44,586 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 20:11:44,593 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 20:11:44,594 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1476849623] [2020-10-27 20:11:44,594 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:11:44,595 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 20:11:44,595 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252447210] [2020-10-27 20:11:44,596 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 20:11:44,596 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:11:44,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 20:11:44,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-10-27 20:11:44,605 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand 8 states. [2020-10-27 20:11:44,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:11:44,784 INFO L93 Difference]: Finished difference Result 53 states and 57 transitions. [2020-10-27 20:11:44,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 20:11:44,784 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 24 [2020-10-27 20:11:44,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:11:44,785 INFO L225 Difference]: With dead ends: 53 [2020-10-27 20:11:44,786 INFO L226 Difference]: Without dead ends: 34 [2020-10-27 20:11:44,786 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-10-27 20:11:44,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-27 20:11:44,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2020-10-27 20:11:44,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-27 20:11:44,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2020-10-27 20:11:44,794 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 24 [2020-10-27 20:11:44,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:11:44,794 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2020-10-27 20:11:44,794 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 20:11:44,794 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2020-10-27 20:11:44,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-27 20:11:44,795 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:11:44,795 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:11:44,796 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 20:11:44,796 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:11:44,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:11:44,797 INFO L82 PathProgramCache]: Analyzing trace with hash 1308779433, now seen corresponding path program 2 times [2020-10-27 20:11:44,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:11:44,797 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1108420035] [2020-10-27 20:11:44,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:11:44,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:11:44,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:11:44,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:11:45,431 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:11:45,431 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-27 20:11:45,431 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:11:45,432 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 620 [2020-10-27 20:11:45,432 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:11:45,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 20:11:45,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-27 20:11:45,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-27 20:11:45,433 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:11:45,509 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:11:45,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:11:45,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:11:45,516 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:11:45,516 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:11:45,516 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:11:45,516 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:11:45,517 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:11:45,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:11:45,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:11:45,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:11:45,517 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:11:45,522 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-27 20:11:45,522 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1108420035] [2020-10-27 20:11:45,522 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:11:45,522 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 20:11:45,523 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165152286] [2020-10-27 20:11:45,523 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 20:11:45,523 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:11:45,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 20:11:45,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-27 20:11:45,524 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand 9 states. [2020-10-27 20:11:45,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:11:45,689 INFO L93 Difference]: Finished difference Result 61 states and 64 transitions. [2020-10-27 20:11:45,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 20:11:45,690 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 31 [2020-10-27 20:11:45,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:11:45,691 INFO L225 Difference]: With dead ends: 61 [2020-10-27 20:11:45,691 INFO L226 Difference]: Without dead ends: 39 [2020-10-27 20:11:45,692 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2020-10-27 20:11:45,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-27 20:11:45,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 37. [2020-10-27 20:11:45,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-27 20:11:45,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2020-10-27 20:11:45,699 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 31 [2020-10-27 20:11:45,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:11:45,699 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2020-10-27 20:11:45,699 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 20:11:45,699 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2020-10-27 20:11:45,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-27 20:11:45,700 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:11:45,701 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:11:45,701 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 20:11:45,701 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:11:45,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:11:45,702 INFO L82 PathProgramCache]: Analyzing trace with hash -1669828828, now seen corresponding path program 3 times [2020-10-27 20:11:45,702 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:11:45,702 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1858380221] [2020-10-27 20:11:45,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:11:45,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:11:45,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:11:45,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:11:46,623 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:11:46,623 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-27 20:11:46,624 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:11:46,624 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 907 [2020-10-27 20:11:46,624 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:11:46,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 20:11:46,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-27 20:11:46,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-27 20:11:46,625 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:11:46,752 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:11:46,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:11:46,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:11:46,759 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:11:46,760 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:11:46,760 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:11:46,760 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 20:11:46,760 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:11:46,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:11:46,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:11:46,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:11:46,761 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:11:46,768 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-27 20:11:46,768 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1858380221] [2020-10-27 20:11:46,768 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:11:46,769 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 20:11:46,769 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017228350] [2020-10-27 20:11:46,769 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 20:11:46,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:11:46,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 20:11:46,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-10-27 20:11:46,771 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand 10 states. [2020-10-27 20:11:46,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:11:46,954 INFO L93 Difference]: Finished difference Result 51 states and 53 transitions. [2020-10-27 20:11:46,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 20:11:46,955 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 36 [2020-10-27 20:11:46,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:11:46,956 INFO L225 Difference]: With dead ends: 51 [2020-10-27 20:11:46,957 INFO L226 Difference]: Without dead ends: 44 [2020-10-27 20:11:46,957 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-10-27 20:11:46,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-27 20:11:46,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 40. [2020-10-27 20:11:46,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-27 20:11:46,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2020-10-27 20:11:46,964 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 36 [2020-10-27 20:11:46,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:11:46,965 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2020-10-27 20:11:46,965 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 20:11:46,965 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2020-10-27 20:11:46,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-27 20:11:46,966 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:11:46,966 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:11:46,967 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 20:11:46,967 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:11:46,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:11:46,968 INFO L82 PathProgramCache]: Analyzing trace with hash -1898614297, now seen corresponding path program 4 times [2020-10-27 20:11:46,968 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:11:46,968 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [37046463] [2020-10-27 20:11:46,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:11:46,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:11:46,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:11:47,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:11:48,057 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:11:48,058 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-27 20:11:48,058 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:11:48,058 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1074 [2020-10-27 20:11:48,058 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:11:48,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 20:11:48,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-27 20:11:48,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-27 20:11:48,059 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:11:48,194 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:11:48,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:11:48,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:11:48,202 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:11:48,203 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:11:48,203 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:11:48,203 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 20:11:48,203 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:11:48,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:11:48,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:11:48,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:11:48,204 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:11:48,210 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-27 20:11:48,211 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [37046463] [2020-10-27 20:11:48,211 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:11:48,211 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 20:11:48,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547430813] [2020-10-27 20:11:48,212 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 20:11:48,212 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:11:48,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 20:11:48,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-10-27 20:11:48,213 INFO L87 Difference]: Start difference. First operand 40 states and 41 transitions. Second operand 11 states. [2020-10-27 20:11:48,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:11:48,387 INFO L93 Difference]: Finished difference Result 77 states and 81 transitions. [2020-10-27 20:11:48,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 20:11:48,387 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 39 [2020-10-27 20:11:48,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:11:48,388 INFO L225 Difference]: With dead ends: 77 [2020-10-27 20:11:48,388 INFO L226 Difference]: Without dead ends: 49 [2020-10-27 20:11:48,389 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-10-27 20:11:48,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-27 20:11:48,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 47. [2020-10-27 20:11:48,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-27 20:11:48,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2020-10-27 20:11:48,396 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 39 [2020-10-27 20:11:48,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:11:48,396 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2020-10-27 20:11:48,397 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 20:11:48,397 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2020-10-27 20:11:48,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-27 20:11:48,398 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:11:48,398 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:11:48,398 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 20:11:48,398 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:11:48,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:11:48,399 INFO L82 PathProgramCache]: Analyzing trace with hash 1061869448, now seen corresponding path program 5 times [2020-10-27 20:11:48,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:11:48,399 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [890286133] [2020-10-27 20:11:48,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:11:48,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:11:48,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:11:48,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:11:50,409 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:11:50,409 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-27 20:11:50,410 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:11:50,410 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1994 [2020-10-27 20:11:50,410 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:11:50,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 20:11:50,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-27 20:11:50,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-27 20:11:50,410 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:11:50,520 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:11:50,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:11:50,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:11:50,526 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:11:50,526 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:11:50,527 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:11:50,527 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:11:50,527 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:11:50,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:11:50,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:11:50,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:11:50,528 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:11:50,533 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-27 20:11:50,534 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [890286133] [2020-10-27 20:11:50,534 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:11:50,534 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 20:11:50,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144872834] [2020-10-27 20:11:50,535 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 20:11:50,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:11:50,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 20:11:50,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-10-27 20:11:50,536 INFO L87 Difference]: Start difference. First operand 47 states and 48 transitions. Second operand 12 states. [2020-10-27 20:11:50,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:11:50,718 INFO L93 Difference]: Finished difference Result 85 states and 88 transitions. [2020-10-27 20:11:50,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 20:11:50,718 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 46 [2020-10-27 20:11:50,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:11:50,719 INFO L225 Difference]: With dead ends: 85 [2020-10-27 20:11:50,720 INFO L226 Difference]: Without dead ends: 54 [2020-10-27 20:11:50,720 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2020-10-27 20:11:50,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-27 20:11:50,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 52. [2020-10-27 20:11:50,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-27 20:11:50,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 53 transitions. [2020-10-27 20:11:50,727 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 53 transitions. Word has length 46 [2020-10-27 20:11:50,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:11:50,728 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 53 transitions. [2020-10-27 20:11:50,728 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 20:11:50,728 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 53 transitions. [2020-10-27 20:11:50,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-27 20:11:50,729 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:11:50,729 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:11:50,729 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 20:11:50,729 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:11:50,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:11:50,730 INFO L82 PathProgramCache]: Analyzing trace with hash -194837791, now seen corresponding path program 6 times [2020-10-27 20:11:50,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:11:50,730 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1025580897] [2020-10-27 20:11:50,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:11:50,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:11:50,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:11:50,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:11:52,213 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:11:52,214 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-27 20:11:52,214 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:11:52,214 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1468 [2020-10-27 20:11:52,214 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:11:52,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 20:11:52,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-10-27 20:11:52,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-27 20:11:52,215 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:11:52,344 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:11:52,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:11:52,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:11:52,352 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:11:52,352 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:11:52,353 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:11:52,353 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 20:11:52,353 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:11:52,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:11:52,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:11:52,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:11:52,354 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:11:52,360 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2020-10-27 20:11:52,360 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1025580897] [2020-10-27 20:11:52,361 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:11:52,361 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 20:11:52,361 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856870228] [2020-10-27 20:11:52,361 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 20:11:52,362 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:11:52,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 20:11:52,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-27 20:11:52,363 INFO L87 Difference]: Start difference. First operand 52 states and 53 transitions. Second operand 13 states. [2020-10-27 20:11:52,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:11:52,571 INFO L93 Difference]: Finished difference Result 93 states and 96 transitions. [2020-10-27 20:11:52,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 20:11:52,572 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 51 [2020-10-27 20:11:52,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:11:52,573 INFO L225 Difference]: With dead ends: 93 [2020-10-27 20:11:52,573 INFO L226 Difference]: Without dead ends: 59 [2020-10-27 20:11:52,574 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2020-10-27 20:11:52,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-27 20:11:52,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 57. [2020-10-27 20:11:52,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-27 20:11:52,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2020-10-27 20:11:52,580 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 51 [2020-10-27 20:11:52,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:11:52,581 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2020-10-27 20:11:52,581 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 20:11:52,581 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2020-10-27 20:11:52,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-27 20:11:52,582 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:11:52,582 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:11:52,582 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 20:11:52,582 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:11:52,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:11:52,583 INFO L82 PathProgramCache]: Analyzing trace with hash -2143936532, now seen corresponding path program 7 times [2020-10-27 20:11:52,583 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:11:52,584 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1937880658] [2020-10-27 20:11:52,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:11:52,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:11:52,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:11:52,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:11:54,822 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:11:54,822 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-27 20:11:54,822 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:11:54,823 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2221 [2020-10-27 20:11:54,823 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:11:54,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 20:11:54,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-27 20:11:54,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-27 20:11:54,824 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 20:11:55,001 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:11:55,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:11:55,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:11:55,007 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:11:55,007 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:11:55,007 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:11:55,007 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:11:55,007 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:11:55,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:11:55,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:11:55,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:11:55,008 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:11:55,019 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-10-27 20:11:55,020 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1937880658] [2020-10-27 20:11:55,020 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:11:55,020 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 20:11:55,020 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119427373] [2020-10-27 20:11:55,022 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 20:11:55,022 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:11:55,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 20:11:55,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2020-10-27 20:11:55,023 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand 14 states. [2020-10-27 20:11:55,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:11:55,223 INFO L93 Difference]: Finished difference Result 71 states and 73 transitions. [2020-10-27 20:11:55,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 20:11:55,223 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 56 [2020-10-27 20:11:55,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:11:55,224 INFO L225 Difference]: With dead ends: 71 [2020-10-27 20:11:55,225 INFO L226 Difference]: Without dead ends: 64 [2020-10-27 20:11:55,225 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2020-10-27 20:11:55,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-27 20:11:55,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 60. [2020-10-27 20:11:55,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-27 20:11:55,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2020-10-27 20:11:55,241 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 56 [2020-10-27 20:11:55,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:11:55,242 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2020-10-27 20:11:55,242 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 20:11:55,242 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2020-10-27 20:11:55,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-27 20:11:55,246 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:11:55,246 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:11:55,246 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 20:11:55,246 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:11:55,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:11:55,247 INFO L82 PathProgramCache]: Analyzing trace with hash 106212383, now seen corresponding path program 8 times [2020-10-27 20:11:55,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:11:55,248 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [812369453] [2020-10-27 20:11:55,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:11:55,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:11:55,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:11:55,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:11:58,658 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:11:58,659 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-27 20:11:58,659 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:11:58,659 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3393 [2020-10-27 20:11:58,659 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:11:58,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 20:11:58,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-27 20:11:58,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-27 20:11:58,660 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:11:58,815 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:11:58,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:11:58,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:11:58,821 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:11:58,822 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:11:58,822 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:11:58,822 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:11:58,822 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:11:58,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:11:58,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:11:58,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:11:58,823 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:11:58,830 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-10-27 20:11:58,831 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [812369453] [2020-10-27 20:11:58,831 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:11:58,831 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 20:11:58,831 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540830430] [2020-10-27 20:11:58,833 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 20:11:58,833 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:11:58,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 20:11:58,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2020-10-27 20:11:58,834 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand 15 states. [2020-10-27 20:11:59,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:11:59,030 INFO L93 Difference]: Finished difference Result 109 states and 113 transitions. [2020-10-27 20:11:59,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 20:11:59,030 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 59 [2020-10-27 20:11:59,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:11:59,031 INFO L225 Difference]: With dead ends: 109 [2020-10-27 20:11:59,031 INFO L226 Difference]: Without dead ends: 69 [2020-10-27 20:11:59,032 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2020-10-27 20:11:59,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-27 20:11:59,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 67. [2020-10-27 20:11:59,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-27 20:11:59,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 68 transitions. [2020-10-27 20:11:59,039 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 68 transitions. Word has length 59 [2020-10-27 20:11:59,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:11:59,039 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 68 transitions. [2020-10-27 20:11:59,039 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 20:11:59,040 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 68 transitions. [2020-10-27 20:11:59,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-27 20:11:59,041 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:11:59,041 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:11:59,041 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 20:11:59,041 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:11:59,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:11:59,042 INFO L82 PathProgramCache]: Analyzing trace with hash 518293584, now seen corresponding path program 9 times [2020-10-27 20:11:59,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:11:59,042 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [274693625] [2020-10-27 20:11:59,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:11:59,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:11:59,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:11:59,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:12:03,895 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:12:03,896 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-27 20:12:03,896 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:12:03,897 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4836 [2020-10-27 20:12:03,897 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:12:03,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 20:12:03,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-27 20:12:03,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-27 20:12:03,898 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 20:12:04,109 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:12:04,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:12:04,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:12:04,117 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:12:04,118 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:12:04,118 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:12:04,118 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 20:12:04,118 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:12:04,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:12:04,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:12:04,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:12:04,119 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:12:04,131 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-10-27 20:12:04,132 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [274693625] [2020-10-27 20:12:04,132 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:12:04,132 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-27 20:12:04,132 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460861811] [2020-10-27 20:12:04,133 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 20:12:04,133 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:12:04,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 20:12:04,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2020-10-27 20:12:04,134 INFO L87 Difference]: Start difference. First operand 67 states and 68 transitions. Second operand 16 states. [2020-10-27 20:12:04,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:12:04,373 INFO L93 Difference]: Finished difference Result 117 states and 120 transitions. [2020-10-27 20:12:04,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 20:12:04,374 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 66 [2020-10-27 20:12:04,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:12:04,375 INFO L225 Difference]: With dead ends: 117 [2020-10-27 20:12:04,375 INFO L226 Difference]: Without dead ends: 74 [2020-10-27 20:12:04,376 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=94, Invalid=212, Unknown=0, NotChecked=0, Total=306 [2020-10-27 20:12:04,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-27 20:12:04,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 72. [2020-10-27 20:12:04,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-27 20:12:04,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 73 transitions. [2020-10-27 20:12:04,391 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 73 transitions. Word has length 66 [2020-10-27 20:12:04,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:12:04,391 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 73 transitions. [2020-10-27 20:12:04,391 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 20:12:04,391 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 73 transitions. [2020-10-27 20:12:04,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-27 20:12:04,394 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:12:04,394 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:12:04,395 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 20:12:04,395 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:12:04,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:12:04,395 INFO L82 PathProgramCache]: Analyzing trace with hash 21733913, now seen corresponding path program 10 times [2020-10-27 20:12:04,396 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:12:04,396 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [253780009] [2020-10-27 20:12:04,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:12:04,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:12:04,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:12:04,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:12:07,469 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:12:07,469 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-27 20:12:07,470 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:12:07,470 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3053 [2020-10-27 20:12:07,470 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:12:07,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-27 20:12:07,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 35 [2020-10-27 20:12:07,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-27 20:12:07,471 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:12:07,683 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:12:07,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:12:07,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:12:07,689 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:12:07,690 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:12:07,690 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:12:07,690 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:12:07,690 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:12:07,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:12:07,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:12:07,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:12:07,691 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:12:07,699 INFO L134 CoverageAnalysis]: Checked inductivity of 308 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2020-10-27 20:12:07,700 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [253780009] [2020-10-27 20:12:07,700 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:12:07,700 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-27 20:12:07,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548145226] [2020-10-27 20:12:07,701 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-27 20:12:07,701 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:12:07,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-27 20:12:07,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=175, Unknown=0, NotChecked=0, Total=272 [2020-10-27 20:12:07,702 INFO L87 Difference]: Start difference. First operand 72 states and 73 transitions. Second operand 17 states. [2020-10-27 20:12:07,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:12:07,954 INFO L93 Difference]: Finished difference Result 125 states and 128 transitions. [2020-10-27 20:12:07,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-27 20:12:07,955 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 71 [2020-10-27 20:12:07,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:12:07,956 INFO L225 Difference]: With dead ends: 125 [2020-10-27 20:12:07,956 INFO L226 Difference]: Without dead ends: 79 [2020-10-27 20:12:07,957 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=107, Invalid=235, Unknown=0, NotChecked=0, Total=342 [2020-10-27 20:12:07,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-27 20:12:07,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 77. [2020-10-27 20:12:07,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-27 20:12:07,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 78 transitions. [2020-10-27 20:12:07,962 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 78 transitions. Word has length 71 [2020-10-27 20:12:07,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:12:07,963 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 78 transitions. [2020-10-27 20:12:07,963 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-27 20:12:07,963 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 78 transitions. [2020-10-27 20:12:07,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-27 20:12:07,964 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:12:07,964 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:12:07,964 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 20:12:07,964 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:12:07,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:12:07,965 INFO L82 PathProgramCache]: Analyzing trace with hash 276844724, now seen corresponding path program 11 times [2020-10-27 20:12:07,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:12:07,965 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [479471321] [2020-10-27 20:12:07,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:12:07,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:12:07,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:12:08,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:12:11,578 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:12:11,579 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-27 20:12:11,579 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:12:11,579 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3597 [2020-10-27 20:12:11,579 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:12:11,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-27 20:12:11,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 37 [2020-10-27 20:12:11,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-27 20:12:11,580 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:12:11,905 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:12:11,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:12:11,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:12:11,913 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:12:11,913 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:12:11,913 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:12:11,913 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:12:11,914 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:12:11,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:12:11,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:12:11,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:12:11,915 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:12:11,931 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2020-10-27 20:12:11,931 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [479471321] [2020-10-27 20:12:11,932 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:12:11,932 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-27 20:12:11,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565238295] [2020-10-27 20:12:11,933 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-27 20:12:11,934 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:12:11,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-27 20:12:11,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=195, Unknown=0, NotChecked=0, Total=306 [2020-10-27 20:12:11,935 INFO L87 Difference]: Start difference. First operand 77 states and 78 transitions. Second operand 18 states. [2020-10-27 20:12:12,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:12:12,262 INFO L93 Difference]: Finished difference Result 133 states and 136 transitions. [2020-10-27 20:12:12,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-27 20:12:12,263 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 76 [2020-10-27 20:12:12,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:12:12,264 INFO L225 Difference]: With dead ends: 133 [2020-10-27 20:12:12,264 INFO L226 Difference]: Without dead ends: 84 [2020-10-27 20:12:12,268 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=121, Invalid=259, Unknown=0, NotChecked=0, Total=380 [2020-10-27 20:12:12,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-27 20:12:12,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 82. [2020-10-27 20:12:12,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-27 20:12:12,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 83 transitions. [2020-10-27 20:12:12,281 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 83 transitions. Word has length 76 [2020-10-27 20:12:12,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:12:12,282 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 83 transitions. [2020-10-27 20:12:12,282 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-27 20:12:12,282 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 83 transitions. [2020-10-27 20:12:12,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-27 20:12:12,283 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:12:12,283 INFO L422 BasicCegarLoop]: trace histogram [14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:12:12,285 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 20:12:12,286 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:12:12,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:12:12,286 INFO L82 PathProgramCache]: Analyzing trace with hash 892948917, now seen corresponding path program 12 times [2020-10-27 20:12:12,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:12:12,287 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [907254467] [2020-10-27 20:12:12,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:12:12,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:12:12,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:12:12,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:12:16,148 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:12:16,149 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-27 20:12:16,149 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:12:16,149 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3846 [2020-10-27 20:12:16,149 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:12:16,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-27 20:12:16,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 39 [2020-10-27 20:12:16,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-27 20:12:16,150 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:12:16,405 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:12:16,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:12:16,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:12:16,410 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:12:16,410 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:12:16,410 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:12:16,410 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:12:16,411 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:12:16,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:12:16,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:12:16,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:12:16,411 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:12:16,422 INFO L134 CoverageAnalysis]: Checked inductivity of 429 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2020-10-27 20:12:16,422 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [907254467] [2020-10-27 20:12:16,422 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:12:16,422 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-27 20:12:16,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156368728] [2020-10-27 20:12:16,423 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-27 20:12:16,423 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:12:16,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-27 20:12:16,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=216, Unknown=0, NotChecked=0, Total=342 [2020-10-27 20:12:16,424 INFO L87 Difference]: Start difference. First operand 82 states and 83 transitions. Second operand 19 states. [2020-10-27 20:12:16,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:12:16,779 INFO L93 Difference]: Finished difference Result 141 states and 144 transitions. [2020-10-27 20:12:16,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 20:12:16,779 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 81 [2020-10-27 20:12:16,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:12:16,780 INFO L225 Difference]: With dead ends: 141 [2020-10-27 20:12:16,780 INFO L226 Difference]: Without dead ends: 89 [2020-10-27 20:12:16,781 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=136, Invalid=284, Unknown=0, NotChecked=0, Total=420 [2020-10-27 20:12:16,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-27 20:12:16,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 87. [2020-10-27 20:12:16,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-27 20:12:16,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 88 transitions. [2020-10-27 20:12:16,787 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 88 transitions. Word has length 81 [2020-10-27 20:12:16,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:12:16,787 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 88 transitions. [2020-10-27 20:12:16,787 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-27 20:12:16,787 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 88 transitions. [2020-10-27 20:12:16,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-10-27 20:12:16,788 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:12:16,788 INFO L422 BasicCegarLoop]: trace histogram [15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:12:16,788 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-27 20:12:16,789 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:12:16,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:12:16,789 INFO L82 PathProgramCache]: Analyzing trace with hash 1672722712, now seen corresponding path program 13 times [2020-10-27 20:12:16,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:12:16,789 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1591987085] [2020-10-27 20:12:16,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:12:16,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:12:16,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:12:17,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:12:21,815 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:12:21,816 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 96 [2020-10-27 20:12:21,816 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:12:21,816 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-27 20:12:21,816 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:12:21,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-27 20:12:21,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 41 [2020-10-27 20:12:21,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-27 20:12:21,816 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:12:22,091 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:12:22,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:12:22,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:12:22,103 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:12:22,103 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:12:22,104 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:12:22,104 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-27 20:12:22,104 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:12:22,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:12:22,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:12:22,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:12:22,105 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:12:22,126 INFO L134 CoverageAnalysis]: Checked inductivity of 497 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2020-10-27 20:12:22,126 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1591987085] [2020-10-27 20:12:22,129 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:12:22,129 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-27 20:12:22,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525265984] [2020-10-27 20:12:22,130 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-27 20:12:22,130 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:12:22,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-27 20:12:22,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=238, Unknown=0, NotChecked=0, Total=380 [2020-10-27 20:12:22,131 INFO L87 Difference]: Start difference. First operand 87 states and 88 transitions. Second operand 20 states. [2020-10-27 20:12:22,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:12:22,387 INFO L93 Difference]: Finished difference Result 101 states and 103 transitions. [2020-10-27 20:12:22,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 20:12:22,389 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 86 [2020-10-27 20:12:22,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:12:22,390 INFO L225 Difference]: With dead ends: 101 [2020-10-27 20:12:22,390 INFO L226 Difference]: Without dead ends: 94 [2020-10-27 20:12:22,391 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=152, Invalid=310, Unknown=0, NotChecked=0, Total=462 [2020-10-27 20:12:22,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-10-27 20:12:22,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 90. [2020-10-27 20:12:22,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-10-27 20:12:22,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 91 transitions. [2020-10-27 20:12:22,398 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 91 transitions. Word has length 86 [2020-10-27 20:12:22,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:12:22,399 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 91 transitions. [2020-10-27 20:12:22,399 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-27 20:12:22,399 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 91 transitions. [2020-10-27 20:12:22,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-10-27 20:12:22,400 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:12:22,400 INFO L422 BasicCegarLoop]: trace histogram [16, 15, 15, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:12:22,400 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-27 20:12:22,400 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:12:22,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:12:22,401 INFO L82 PathProgramCache]: Analyzing trace with hash 1532523379, now seen corresponding path program 14 times [2020-10-27 20:12:22,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:12:22,402 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [794529931] [2020-10-27 20:12:22,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:12:22,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:12:22,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:12:22,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:12:26,460 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:12:26,460 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 99 [2020-10-27 20:12:26,460 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:12:26,460 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4038 [2020-10-27 20:12:26,461 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:12:26,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-27 20:12:26,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 41 [2020-10-27 20:12:26,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-27 20:12:26,461 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:12:26,787 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:12:26,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:12:26,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:12:26,798 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:12:26,798 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:12:26,798 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:12:26,799 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 20:12:26,799 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:12:26,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:12:26,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:12:26,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:12:26,799 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:12:26,816 INFO L134 CoverageAnalysis]: Checked inductivity of 541 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2020-10-27 20:12:26,817 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [794529931] [2020-10-27 20:12:26,817 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:12:26,817 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-27 20:12:26,817 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696052948] [2020-10-27 20:12:26,818 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-27 20:12:26,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:12:26,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-27 20:12:26,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=261, Unknown=0, NotChecked=0, Total=420 [2020-10-27 20:12:26,822 INFO L87 Difference]: Start difference. First operand 90 states and 91 transitions. Second operand 21 states. [2020-10-27 20:12:27,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:12:27,137 INFO L93 Difference]: Finished difference Result 157 states and 161 transitions. [2020-10-27 20:12:27,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-27 20:12:27,138 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 89 [2020-10-27 20:12:27,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:12:27,139 INFO L225 Difference]: With dead ends: 157 [2020-10-27 20:12:27,139 INFO L226 Difference]: Without dead ends: 99 [2020-10-27 20:12:27,140 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=169, Invalid=337, Unknown=0, NotChecked=0, Total=506 [2020-10-27 20:12:27,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-27 20:12:27,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 97. [2020-10-27 20:12:27,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-27 20:12:27,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 98 transitions. [2020-10-27 20:12:27,146 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 98 transitions. Word has length 89 [2020-10-27 20:12:27,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:12:27,147 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 98 transitions. [2020-10-27 20:12:27,147 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-27 20:12:27,148 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 98 transitions. [2020-10-27 20:12:27,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-10-27 20:12:27,148 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:12:27,148 INFO L422 BasicCegarLoop]: trace histogram [17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:12:27,149 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-27 20:12:27,149 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:12:27,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:12:27,149 INFO L82 PathProgramCache]: Analyzing trace with hash 615055740, now seen corresponding path program 15 times [2020-10-27 20:12:27,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:12:27,150 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2072603240] [2020-10-27 20:12:27,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:12:27,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:12:27,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:12:27,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:12:32,182 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:12:32,183 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 106 [2020-10-27 20:12:32,183 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:12:32,183 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-27 20:12:32,183 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:12:32,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-27 20:12:32,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 45 [2020-10-27 20:12:32,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-27 20:12:32,183 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:12:32,525 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:12:32,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:12:32,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:12:32,530 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:12:32,531 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:12:32,531 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:12:32,531 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:12:32,531 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:12:32,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:12:32,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:12:32,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:12:32,531 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:12:32,547 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2020-10-27 20:12:32,548 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2072603240] [2020-10-27 20:12:32,548 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:12:32,548 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-27 20:12:32,548 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077780050] [2020-10-27 20:12:32,552 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-27 20:12:32,552 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:12:32,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-27 20:12:32,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=285, Unknown=0, NotChecked=0, Total=462 [2020-10-27 20:12:32,558 INFO L87 Difference]: Start difference. First operand 97 states and 98 transitions. Second operand 22 states. [2020-10-27 20:12:32,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:12:32,926 INFO L93 Difference]: Finished difference Result 165 states and 168 transitions. [2020-10-27 20:12:32,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-27 20:12:32,927 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 96 [2020-10-27 20:12:32,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:12:32,928 INFO L225 Difference]: With dead ends: 165 [2020-10-27 20:12:32,928 INFO L226 Difference]: Without dead ends: 104 [2020-10-27 20:12:32,929 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=187, Invalid=365, Unknown=0, NotChecked=0, Total=552 [2020-10-27 20:12:32,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-10-27 20:12:32,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 102. [2020-10-27 20:12:32,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-10-27 20:12:32,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 103 transitions. [2020-10-27 20:12:32,934 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 103 transitions. Word has length 96 [2020-10-27 20:12:32,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:12:32,935 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 103 transitions. [2020-10-27 20:12:32,935 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-27 20:12:32,935 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 103 transitions. [2020-10-27 20:12:32,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-10-27 20:12:32,936 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:12:32,936 INFO L422 BasicCegarLoop]: trace histogram [18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:12:32,936 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-27 20:12:32,936 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:12:32,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:12:32,937 INFO L82 PathProgramCache]: Analyzing trace with hash -9162515, now seen corresponding path program 16 times [2020-10-27 20:12:32,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:12:32,937 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1686527351] [2020-10-27 20:12:32,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:12:32,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:12:32,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:12:33,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:12:37,965 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:12:37,966 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 111 [2020-10-27 20:12:37,966 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:12:37,966 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-27 20:12:37,966 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:12:37,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-27 20:12:37,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 47 [2020-10-27 20:12:37,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-27 20:12:37,966 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:12:38,308 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:12:38,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:12:38,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:12:38,319 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:12:38,320 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:12:38,320 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:12:38,320 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 20:12:38,320 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:12:38,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:12:38,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:12:38,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:12:38,321 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:12:38,335 INFO L134 CoverageAnalysis]: Checked inductivity of 731 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2020-10-27 20:12:38,336 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1686527351] [2020-10-27 20:12:38,336 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:12:38,336 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-27 20:12:38,336 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166691551] [2020-10-27 20:12:38,339 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-27 20:12:38,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:12:38,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-27 20:12:38,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=310, Unknown=0, NotChecked=0, Total=506 [2020-10-27 20:12:38,341 INFO L87 Difference]: Start difference. First operand 102 states and 103 transitions. Second operand 23 states. [2020-10-27 20:12:38,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:12:38,674 INFO L93 Difference]: Finished difference Result 173 states and 176 transitions. [2020-10-27 20:12:38,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-27 20:12:38,675 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 101 [2020-10-27 20:12:38,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:12:38,676 INFO L225 Difference]: With dead ends: 173 [2020-10-27 20:12:38,676 INFO L226 Difference]: Without dead ends: 109 [2020-10-27 20:12:38,677 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=206, Invalid=394, Unknown=0, NotChecked=0, Total=600 [2020-10-27 20:12:38,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-27 20:12:38,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 107. [2020-10-27 20:12:38,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-10-27 20:12:38,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 108 transitions. [2020-10-27 20:12:38,684 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 108 transitions. Word has length 101 [2020-10-27 20:12:38,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:12:38,684 INFO L481 AbstractCegarLoop]: Abstraction has 107 states and 108 transitions. [2020-10-27 20:12:38,684 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-27 20:12:38,684 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 108 transitions. [2020-10-27 20:12:38,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-10-27 20:12:38,685 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:12:38,685 INFO L422 BasicCegarLoop]: trace histogram [19, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:12:38,685 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-27 20:12:38,686 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:12:38,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:12:38,686 INFO L82 PathProgramCache]: Analyzing trace with hash 1091201504, now seen corresponding path program 17 times [2020-10-27 20:12:38,686 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:12:38,687 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1362621967] [2020-10-27 20:12:38,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:12:38,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:12:38,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:12:39,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:12:43,717 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:12:43,718 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 116 [2020-10-27 20:12:43,718 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:12:43,718 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-27 20:12:43,718 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:12:43,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-27 20:12:43,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 49 [2020-10-27 20:12:43,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-27 20:12:43,718 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:12:44,100 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:12:44,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:12:44,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:12:44,105 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:12:44,105 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:12:44,105 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:12:44,105 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:12:44,106 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:12:44,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:12:44,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:12:44,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:12:44,106 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:12:44,129 INFO L134 CoverageAnalysis]: Checked inductivity of 819 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2020-10-27 20:12:44,130 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1362621967] [2020-10-27 20:12:44,130 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:12:44,130 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-27 20:12:44,130 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137463595] [2020-10-27 20:12:44,131 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-27 20:12:44,131 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:12:44,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-27 20:12:44,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=336, Unknown=0, NotChecked=0, Total=552 [2020-10-27 20:12:44,132 INFO L87 Difference]: Start difference. First operand 107 states and 108 transitions. Second operand 24 states. [2020-10-27 20:12:44,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:12:44,508 INFO L93 Difference]: Finished difference Result 181 states and 184 transitions. [2020-10-27 20:12:44,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-27 20:12:44,508 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 106 [2020-10-27 20:12:44,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:12:44,509 INFO L225 Difference]: With dead ends: 181 [2020-10-27 20:12:44,509 INFO L226 Difference]: Without dead ends: 114 [2020-10-27 20:12:44,510 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=226, Invalid=424, Unknown=0, NotChecked=0, Total=650 [2020-10-27 20:12:44,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-10-27 20:12:44,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 112. [2020-10-27 20:12:44,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-10-27 20:12:44,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 113 transitions. [2020-10-27 20:12:44,515 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 113 transitions. Word has length 106 [2020-10-27 20:12:44,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:12:44,516 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 113 transitions. [2020-10-27 20:12:44,516 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-27 20:12:44,516 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 113 transitions. [2020-10-27 20:12:44,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-10-27 20:12:44,517 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:12:44,517 INFO L422 BasicCegarLoop]: trace histogram [20, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:12:44,517 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-27 20:12:44,517 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:12:44,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:12:44,518 INFO L82 PathProgramCache]: Analyzing trace with hash 1097654409, now seen corresponding path program 18 times [2020-10-27 20:12:44,518 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:12:44,518 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1124753178] [2020-10-27 20:12:44,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:12:44,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:12:44,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:12:44,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:12:49,551 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:12:49,551 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 121 [2020-10-27 20:12:49,551 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:12:49,551 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-27 20:12:49,552 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:12:49,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-27 20:12:49,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 51 [2020-10-27 20:12:49,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-10-27 20:12:49,552 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:12:49,976 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:12:49,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:12:49,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:12:49,980 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:12:49,981 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:12:49,981 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:12:49,981 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 20:12:49,981 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:12:49,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:12:49,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:12:49,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:12:49,981 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:12:49,993 INFO L134 CoverageAnalysis]: Checked inductivity of 912 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 361 trivial. 0 not checked. [2020-10-27 20:12:49,993 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1124753178] [2020-10-27 20:12:49,993 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:12:49,993 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-27 20:12:49,994 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790687989] [2020-10-27 20:12:49,994 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-27 20:12:49,994 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:12:49,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-27 20:12:49,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=237, Invalid=363, Unknown=0, NotChecked=0, Total=600 [2020-10-27 20:12:49,995 INFO L87 Difference]: Start difference. First operand 112 states and 113 transitions. Second operand 25 states. [2020-10-27 20:12:50,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:12:50,402 INFO L93 Difference]: Finished difference Result 189 states and 192 transitions. [2020-10-27 20:12:50,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-27 20:12:50,403 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 111 [2020-10-27 20:12:50,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:12:50,404 INFO L225 Difference]: With dead ends: 189 [2020-10-27 20:12:50,405 INFO L226 Difference]: Without dead ends: 119 [2020-10-27 20:12:50,406 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=247, Invalid=455, Unknown=0, NotChecked=0, Total=702 [2020-10-27 20:12:50,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-10-27 20:12:50,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 117. [2020-10-27 20:12:50,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-10-27 20:12:50,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 118 transitions. [2020-10-27 20:12:50,412 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 118 transitions. Word has length 111 [2020-10-27 20:12:50,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:12:50,412 INFO L481 AbstractCegarLoop]: Abstraction has 117 states and 118 transitions. [2020-10-27 20:12:50,413 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-27 20:12:50,413 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 118 transitions. [2020-10-27 20:12:50,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-10-27 20:12:50,414 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:12:50,414 INFO L422 BasicCegarLoop]: trace histogram [21, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:12:50,414 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-27 20:12:50,414 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:12:50,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:12:50,415 INFO L82 PathProgramCache]: Analyzing trace with hash 1812083268, now seen corresponding path program 19 times [2020-10-27 20:12:50,415 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:12:50,415 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1257384595] [2020-10-27 20:12:50,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:12:50,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:12:50,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:12:50,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:12:55,437 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:12:55,438 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 126 [2020-10-27 20:12:55,438 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:12:55,438 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-27 20:12:55,438 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:12:55,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-27 20:12:55,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 53 [2020-10-27 20:12:55,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-27 20:12:55,438 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:12:55,909 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:12:55,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:12:55,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:12:55,914 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:12:55,914 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:12:55,914 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:12:55,914 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:12:55,915 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:12:55,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:12:55,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:12:55,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:12:55,915 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:12:55,931 INFO L134 CoverageAnalysis]: Checked inductivity of 1010 backedges. 0 proven. 610 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2020-10-27 20:12:55,931 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1257384595] [2020-10-27 20:12:55,931 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:12:55,931 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-27 20:12:55,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028242145] [2020-10-27 20:12:55,932 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-27 20:12:55,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:12:55,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-27 20:12:55,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=259, Invalid=391, Unknown=0, NotChecked=0, Total=650 [2020-10-27 20:12:55,933 INFO L87 Difference]: Start difference. First operand 117 states and 118 transitions. Second operand 26 states. [2020-10-27 20:12:56,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:12:56,300 INFO L93 Difference]: Finished difference Result 197 states and 200 transitions. [2020-10-27 20:12:56,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-27 20:12:56,304 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 116 [2020-10-27 20:12:56,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:12:56,305 INFO L225 Difference]: With dead ends: 197 [2020-10-27 20:12:56,305 INFO L226 Difference]: Without dead ends: 124 [2020-10-27 20:12:56,306 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=269, Invalid=487, Unknown=0, NotChecked=0, Total=756 [2020-10-27 20:12:56,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-10-27 20:12:56,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 122. [2020-10-27 20:12:56,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-10-27 20:12:56,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 123 transitions. [2020-10-27 20:12:56,312 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 123 transitions. Word has length 116 [2020-10-27 20:12:56,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:12:56,312 INFO L481 AbstractCegarLoop]: Abstraction has 122 states and 123 transitions. [2020-10-27 20:12:56,312 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-27 20:12:56,312 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 123 transitions. [2020-10-27 20:12:56,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-10-27 20:12:56,314 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:12:56,314 INFO L422 BasicCegarLoop]: trace histogram [22, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:12:56,314 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-27 20:12:56,314 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:12:56,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:12:56,315 INFO L82 PathProgramCache]: Analyzing trace with hash -1712713691, now seen corresponding path program 20 times [2020-10-27 20:12:56,315 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:12:56,315 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [796115726] [2020-10-27 20:12:56,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:12:56,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:12:56,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:12:56,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:13:01,344 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:13:01,344 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 131 [2020-10-27 20:13:01,344 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:13:01,344 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-27 20:13:01,344 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:13:01,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-27 20:13:01,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 55 [2020-10-27 20:13:01,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-27 20:13:01,345 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:13:01,831 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:13:01,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:13:01,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:13:01,838 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:13:01,838 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:13:01,838 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:13:01,838 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:13:01,838 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:13:01,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:13:01,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:13:01,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:13:01,839 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:13:01,855 INFO L134 CoverageAnalysis]: Checked inductivity of 1113 backedges. 0 proven. 672 refuted. 0 times theorem prover too weak. 441 trivial. 0 not checked. [2020-10-27 20:13:01,855 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [796115726] [2020-10-27 20:13:01,855 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:13:01,856 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-27 20:13:01,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122951400] [2020-10-27 20:13:01,856 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-27 20:13:01,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:13:01,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-27 20:13:01,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=282, Invalid=420, Unknown=0, NotChecked=0, Total=702 [2020-10-27 20:13:01,857 INFO L87 Difference]: Start difference. First operand 122 states and 123 transitions. Second operand 27 states. [2020-10-27 20:13:02,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:13:02,272 INFO L93 Difference]: Finished difference Result 205 states and 208 transitions. [2020-10-27 20:13:02,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-27 20:13:02,273 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 121 [2020-10-27 20:13:02,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:13:02,275 INFO L225 Difference]: With dead ends: 205 [2020-10-27 20:13:02,275 INFO L226 Difference]: Without dead ends: 129 [2020-10-27 20:13:02,277 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=292, Invalid=520, Unknown=0, NotChecked=0, Total=812 [2020-10-27 20:13:02,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-10-27 20:13:02,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 127. [2020-10-27 20:13:02,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-10-27 20:13:02,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 128 transitions. [2020-10-27 20:13:02,283 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 128 transitions. Word has length 121 [2020-10-27 20:13:02,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:13:02,283 INFO L481 AbstractCegarLoop]: Abstraction has 127 states and 128 transitions. [2020-10-27 20:13:02,283 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-27 20:13:02,283 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 128 transitions. [2020-10-27 20:13:02,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-10-27 20:13:02,284 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:13:02,285 INFO L422 BasicCegarLoop]: trace histogram [23, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:13:02,285 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-27 20:13:02,285 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:13:02,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:13:02,285 INFO L82 PathProgramCache]: Analyzing trace with hash 37395112, now seen corresponding path program 21 times [2020-10-27 20:13:02,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:13:02,286 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [913608070] [2020-10-27 20:13:02,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:13:02,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:13:02,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:13:03,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:13:07,316 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:13:07,317 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 136 [2020-10-27 20:13:07,317 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:13:07,317 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-27 20:13:07,317 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:13:07,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-27 20:13:07,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 57 [2020-10-27 20:13:07,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-27 20:13:07,317 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:13:07,870 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:13:07,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:13:07,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:13:07,877 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:13:07,877 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:13:07,878 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:13:07,878 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:13:07,878 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:13:07,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:13:07,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:13:07,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:13:07,878 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:13:07,895 INFO L134 CoverageAnalysis]: Checked inductivity of 1221 backedges. 0 proven. 737 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2020-10-27 20:13:07,896 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [913608070] [2020-10-27 20:13:07,896 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:13:07,896 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-27 20:13:07,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618619460] [2020-10-27 20:13:07,897 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-27 20:13:07,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:13:07,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-27 20:13:07,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=450, Unknown=0, NotChecked=0, Total=756 [2020-10-27 20:13:07,898 INFO L87 Difference]: Start difference. First operand 127 states and 128 transitions. Second operand 28 states. [2020-10-27 20:13:08,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:13:08,294 INFO L93 Difference]: Finished difference Result 141 states and 143 transitions. [2020-10-27 20:13:08,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-27 20:13:08,294 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 126 [2020-10-27 20:13:08,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:13:08,296 INFO L225 Difference]: With dead ends: 141 [2020-10-27 20:13:08,296 INFO L226 Difference]: Without dead ends: 134 [2020-10-27 20:13:08,297 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=316, Invalid=554, Unknown=0, NotChecked=0, Total=870 [2020-10-27 20:13:08,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-10-27 20:13:08,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 130. [2020-10-27 20:13:08,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-10-27 20:13:08,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 131 transitions. [2020-10-27 20:13:08,304 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 131 transitions. Word has length 126 [2020-10-27 20:13:08,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:13:08,305 INFO L481 AbstractCegarLoop]: Abstraction has 130 states and 131 transitions. [2020-10-27 20:13:08,305 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-27 20:13:08,305 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 131 transitions. [2020-10-27 20:13:08,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-10-27 20:13:08,306 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:13:08,306 INFO L422 BasicCegarLoop]: trace histogram [24, 23, 23, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:13:08,307 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-27 20:13:08,307 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:13:08,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:13:08,307 INFO L82 PathProgramCache]: Analyzing trace with hash 1302030307, now seen corresponding path program 22 times [2020-10-27 20:13:08,307 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:13:08,308 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2129531738] [2020-10-27 20:13:08,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:13:08,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:13:08,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:13:09,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:13:13,334 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:13:13,334 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 139 [2020-10-27 20:13:13,334 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:13:13,334 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-27 20:13:13,334 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:13:13,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-27 20:13:13,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 57 [2020-10-27 20:13:13,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-10-27 20:13:13,335 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:13:13,922 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:13:13,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:13:13,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:13:13,927 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:13:13,927 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:13:13,927 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:13:13,927 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:13:13,927 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:13:13,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:13:13,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:13:13,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:13:13,928 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:13:13,945 INFO L134 CoverageAnalysis]: Checked inductivity of 1289 backedges. 0 proven. 805 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2020-10-27 20:13:13,946 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2129531738] [2020-10-27 20:13:13,946 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:13:13,946 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-27 20:13:13,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574943882] [2020-10-27 20:13:13,946 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-27 20:13:13,947 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:13:13,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-27 20:13:13,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=331, Invalid=481, Unknown=0, NotChecked=0, Total=812 [2020-10-27 20:13:13,948 INFO L87 Difference]: Start difference. First operand 130 states and 131 transitions. Second operand 29 states. [2020-10-27 20:13:14,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:13:14,442 INFO L93 Difference]: Finished difference Result 221 states and 225 transitions. [2020-10-27 20:13:14,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-27 20:13:14,443 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 129 [2020-10-27 20:13:14,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:13:14,444 INFO L225 Difference]: With dead ends: 221 [2020-10-27 20:13:14,445 INFO L226 Difference]: Without dead ends: 139 [2020-10-27 20:13:14,445 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=341, Invalid=589, Unknown=0, NotChecked=0, Total=930 [2020-10-27 20:13:14,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-10-27 20:13:14,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 137. [2020-10-27 20:13:14,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-10-27 20:13:14,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 138 transitions. [2020-10-27 20:13:14,457 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 138 transitions. Word has length 129 [2020-10-27 20:13:14,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:13:14,458 INFO L481 AbstractCegarLoop]: Abstraction has 137 states and 138 transitions. [2020-10-27 20:13:14,458 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-27 20:13:14,458 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 138 transitions. [2020-10-27 20:13:14,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-10-27 20:13:14,459 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:13:14,459 INFO L422 BasicCegarLoop]: trace histogram [25, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:13:14,459 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-27 20:13:14,460 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:13:14,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:13:14,460 INFO L82 PathProgramCache]: Analyzing trace with hash -304225524, now seen corresponding path program 23 times [2020-10-27 20:13:14,460 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:13:14,460 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [363616361] [2020-10-27 20:13:14,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:13:14,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:13:14,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:13:15,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:13:19,488 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:13:19,489 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 146 [2020-10-27 20:13:19,489 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:13:19,489 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-27 20:13:19,489 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:13:19,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-27 20:13:19,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 61 [2020-10-27 20:13:19,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-10-27 20:13:19,489 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:13:20,106 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:13:20,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:13:20,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:13:20,111 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:13:20,111 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:13:20,111 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:13:20,111 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:13:20,111 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:13:20,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:13:20,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:13:20,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:13:20,112 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:13:20,127 INFO L134 CoverageAnalysis]: Checked inductivity of 1452 backedges. 0 proven. 876 refuted. 0 times theorem prover too weak. 576 trivial. 0 not checked. [2020-10-27 20:13:20,127 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [363616361] [2020-10-27 20:13:20,128 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:13:20,128 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-27 20:13:20,128 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480852055] [2020-10-27 20:13:20,128 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-27 20:13:20,128 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:13:20,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-27 20:13:20,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=357, Invalid=513, Unknown=0, NotChecked=0, Total=870 [2020-10-27 20:13:20,129 INFO L87 Difference]: Start difference. First operand 137 states and 138 transitions. Second operand 30 states. [2020-10-27 20:13:20,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:13:20,563 INFO L93 Difference]: Finished difference Result 229 states and 232 transitions. [2020-10-27 20:13:20,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-27 20:13:20,564 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 136 [2020-10-27 20:13:20,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:13:20,566 INFO L225 Difference]: With dead ends: 229 [2020-10-27 20:13:20,566 INFO L226 Difference]: Without dead ends: 144 [2020-10-27 20:13:20,567 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=367, Invalid=625, Unknown=0, NotChecked=0, Total=992 [2020-10-27 20:13:20,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-10-27 20:13:20,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 142. [2020-10-27 20:13:20,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-27 20:13:20,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 143 transitions. [2020-10-27 20:13:20,587 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 143 transitions. Word has length 136 [2020-10-27 20:13:20,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:13:20,588 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 143 transitions. [2020-10-27 20:13:20,588 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-27 20:13:20,588 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 143 transitions. [2020-10-27 20:13:20,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2020-10-27 20:13:20,589 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:13:20,590 INFO L422 BasicCegarLoop]: trace histogram [26, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:13:20,590 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-27 20:13:20,594 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:13:20,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:13:20,595 INFO L82 PathProgramCache]: Analyzing trace with hash 1934159709, now seen corresponding path program 24 times [2020-10-27 20:13:20,595 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:13:20,595 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [86184752] [2020-10-27 20:13:20,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:13:20,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:13:20,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:13:21,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:13:25,641 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:13:25,642 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 151 [2020-10-27 20:13:25,642 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:13:25,642 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5019 [2020-10-27 20:13:25,642 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:13:25,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-27 20:13:25,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 63 [2020-10-27 20:13:25,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 83 [2020-10-27 20:13:25,642 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:13:26,396 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:13:26,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:13:26,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:13:26,401 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:13:26,401 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:13:26,401 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:13:26,401 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:13:26,401 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:13:26,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:13:26,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:13:26,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:13:26,402 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:13:26,426 INFO L134 CoverageAnalysis]: Checked inductivity of 1575 backedges. 0 proven. 950 refuted. 0 times theorem prover too weak. 625 trivial. 0 not checked. [2020-10-27 20:13:26,427 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [86184752] [2020-10-27 20:13:26,427 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:13:26,427 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-27 20:13:26,427 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959420993] [2020-10-27 20:13:26,429 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-27 20:13:26,429 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:13:26,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-27 20:13:26,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=384, Invalid=546, Unknown=0, NotChecked=0, Total=930 [2020-10-27 20:13:26,430 INFO L87 Difference]: Start difference. First operand 142 states and 143 transitions. Second operand 31 states. [2020-10-27 20:13:26,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:13:26,925 INFO L93 Difference]: Finished difference Result 156 states and 158 transitions. [2020-10-27 20:13:26,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-27 20:13:26,926 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 141 [2020-10-27 20:13:26,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:13:26,929 INFO L225 Difference]: With dead ends: 156 [2020-10-27 20:13:26,929 INFO L226 Difference]: Without dead ends: 149 [2020-10-27 20:13:26,930 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=394, Invalid=662, Unknown=0, NotChecked=0, Total=1056 [2020-10-27 20:13:26,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2020-10-27 20:13:26,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 145. [2020-10-27 20:13:26,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-10-27 20:13:26,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 146 transitions. [2020-10-27 20:13:26,938 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 146 transitions. Word has length 141 [2020-10-27 20:13:26,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:13:26,938 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 146 transitions. [2020-10-27 20:13:26,938 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-27 20:13:26,938 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 146 transitions. [2020-10-27 20:13:26,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2020-10-27 20:13:26,940 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:13:26,940 INFO L422 BasicCegarLoop]: trace histogram [27, 26, 26, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:13:26,940 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-27 20:13:26,940 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:13:26,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:13:26,941 INFO L82 PathProgramCache]: Analyzing trace with hash -1068573938, now seen corresponding path program 25 times [2020-10-27 20:13:26,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:13:26,941 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1541142564] [2020-10-27 20:13:26,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:13:26,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:13:26,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:13:28,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:13:31,969 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:13:31,970 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 154 [2020-10-27 20:13:31,970 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:13:31,970 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-27 20:13:31,970 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:13:31,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-27 20:13:31,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 63 [2020-10-27 20:13:31,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 86 [2020-10-27 20:13:31,970 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:13:32,589 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:13:32,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:13:32,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:13:32,596 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:13:32,596 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:13:32,596 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:13:32,596 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 20:13:32,596 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:13:32,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:13:32,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:13:32,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:13:32,597 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:13:32,619 INFO L134 CoverageAnalysis]: Checked inductivity of 1652 backedges. 0 proven. 1027 refuted. 0 times theorem prover too weak. 625 trivial. 0 not checked. [2020-10-27 20:13:32,620 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1541142564] [2020-10-27 20:13:32,621 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:13:32,621 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-27 20:13:32,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397329622] [2020-10-27 20:13:32,623 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-27 20:13:32,624 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:13:32,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-27 20:13:32,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=412, Invalid=580, Unknown=0, NotChecked=0, Total=992 [2020-10-27 20:13:32,626 INFO L87 Difference]: Start difference. First operand 145 states and 146 transitions. Second operand 32 states. [2020-10-27 20:13:33,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:13:33,092 INFO L93 Difference]: Finished difference Result 245 states and 249 transitions. [2020-10-27 20:13:33,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-27 20:13:33,092 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 144 [2020-10-27 20:13:33,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:13:33,094 INFO L225 Difference]: With dead ends: 245 [2020-10-27 20:13:33,094 INFO L226 Difference]: Without dead ends: 154 [2020-10-27 20:13:33,096 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=422, Invalid=700, Unknown=0, NotChecked=0, Total=1122 [2020-10-27 20:13:33,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-10-27 20:13:33,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 152. [2020-10-27 20:13:33,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-10-27 20:13:33,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 153 transitions. [2020-10-27 20:13:33,104 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 153 transitions. Word has length 144 [2020-10-27 20:13:33,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:13:33,104 INFO L481 AbstractCegarLoop]: Abstraction has 152 states and 153 transitions. [2020-10-27 20:13:33,104 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-27 20:13:33,104 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 153 transitions. [2020-10-27 20:13:33,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2020-10-27 20:13:33,106 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:13:33,106 INFO L422 BasicCegarLoop]: trace histogram [28, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:13:33,106 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-27 20:13:33,106 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:13:33,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:13:33,107 INFO L82 PathProgramCache]: Analyzing trace with hash -1009377543, now seen corresponding path program 26 times [2020-10-27 20:13:33,107 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:13:33,107 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [632248684] [2020-10-27 20:13:33,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:13:33,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:13:33,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:13:34,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:13:38,135 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:13:38,136 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 161 [2020-10-27 20:13:38,136 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:13:38,136 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-27 20:13:38,136 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:13:38,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-27 20:13:38,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 67 [2020-10-27 20:13:38,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 89 [2020-10-27 20:13:38,136 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:13:38,861 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:13:38,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:13:38,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:13:38,869 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:13:38,869 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:13:38,870 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:13:38,870 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 20:13:38,870 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:13:38,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:13:38,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:13:38,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:13:38,871 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:13:38,902 INFO L134 CoverageAnalysis]: Checked inductivity of 1836 backedges. 0 proven. 1107 refuted. 0 times theorem prover too weak. 729 trivial. 0 not checked. [2020-10-27 20:13:38,902 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [632248684] [2020-10-27 20:13:38,903 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:13:38,903 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-27 20:13:38,903 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758062611] [2020-10-27 20:13:38,904 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-27 20:13:38,904 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:13:38,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-27 20:13:38,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=441, Invalid=615, Unknown=0, NotChecked=0, Total=1056 [2020-10-27 20:13:38,906 INFO L87 Difference]: Start difference. First operand 152 states and 153 transitions. Second operand 33 states. [2020-10-27 20:13:39,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:13:39,457 INFO L93 Difference]: Finished difference Result 253 states and 256 transitions. [2020-10-27 20:13:39,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-27 20:13:39,458 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 151 [2020-10-27 20:13:39,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:13:39,460 INFO L225 Difference]: With dead ends: 253 [2020-10-27 20:13:39,460 INFO L226 Difference]: Without dead ends: 159 [2020-10-27 20:13:39,462 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=451, Invalid=739, Unknown=0, NotChecked=0, Total=1190 [2020-10-27 20:13:39,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-10-27 20:13:39,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 157. [2020-10-27 20:13:39,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-10-27 20:13:39,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 158 transitions. [2020-10-27 20:13:39,469 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 158 transitions. Word has length 151 [2020-10-27 20:13:39,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:13:39,469 INFO L481 AbstractCegarLoop]: Abstraction has 157 states and 158 transitions. [2020-10-27 20:13:39,469 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-27 20:13:39,470 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 158 transitions. [2020-10-27 20:13:39,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2020-10-27 20:13:39,471 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:13:39,471 INFO L422 BasicCegarLoop]: trace histogram [29, 28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:13:39,471 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-27 20:13:39,471 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:13:39,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:13:39,472 INFO L82 PathProgramCache]: Analyzing trace with hash -1987177516, now seen corresponding path program 27 times [2020-10-27 20:13:39,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:13:39,472 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [580627344] [2020-10-27 20:13:39,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:13:39,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:13:39,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:13:40,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:13:44,548 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:13:44,548 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 166 [2020-10-27 20:13:44,548 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:13:44,548 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5053 [2020-10-27 20:13:44,549 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:13:44,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-27 20:13:44,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 69 [2020-10-27 20:13:44,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 92 [2020-10-27 20:13:44,549 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:13:45,268 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:13:45,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:13:45,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:13:45,277 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:13:45,277 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:13:45,277 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:13:45,277 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:13:45,277 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:13:45,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:13:45,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:13:45,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:13:45,278 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:13:45,307 INFO L134 CoverageAnalysis]: Checked inductivity of 1974 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 784 trivial. 0 not checked. [2020-10-27 20:13:45,307 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [580627344] [2020-10-27 20:13:45,308 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:13:45,308 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-27 20:13:45,308 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905806263] [2020-10-27 20:13:45,308 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-27 20:13:45,308 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:13:45,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-27 20:13:45,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=471, Invalid=651, Unknown=0, NotChecked=0, Total=1122 [2020-10-27 20:13:45,310 INFO L87 Difference]: Start difference. First operand 157 states and 158 transitions. Second operand 34 states. [2020-10-27 20:13:45,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:13:45,766 INFO L93 Difference]: Finished difference Result 261 states and 264 transitions. [2020-10-27 20:13:45,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-27 20:13:45,766 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 156 [2020-10-27 20:13:45,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:13:45,768 INFO L225 Difference]: With dead ends: 261 [2020-10-27 20:13:45,768 INFO L226 Difference]: Without dead ends: 164 [2020-10-27 20:13:45,770 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=481, Invalid=779, Unknown=0, NotChecked=0, Total=1260 [2020-10-27 20:13:45,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2020-10-27 20:13:45,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 162. [2020-10-27 20:13:45,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-10-27 20:13:45,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 163 transitions. [2020-10-27 20:13:45,777 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 163 transitions. Word has length 156 [2020-10-27 20:13:45,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:13:45,778 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 163 transitions. [2020-10-27 20:13:45,778 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-27 20:13:45,778 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 163 transitions. [2020-10-27 20:13:45,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2020-10-27 20:13:45,779 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:13:45,779 INFO L422 BasicCegarLoop]: trace histogram [30, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:13:45,779 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-27 20:13:45,779 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:13:45,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:13:45,780 INFO L82 PathProgramCache]: Analyzing trace with hash 37670549, now seen corresponding path program 28 times [2020-10-27 20:13:45,780 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:13:45,780 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [755884526] [2020-10-27 20:13:45,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:13:45,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:13:45,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:13:47,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:13:50,805 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:13:50,805 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 171 [2020-10-27 20:13:50,805 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:13:50,806 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-27 20:13:50,806 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:13:50,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-27 20:13:50,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 71 [2020-10-27 20:13:50,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 95 [2020-10-27 20:13:50,806 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:13:51,600 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:13:51,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:13:51,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:13:51,605 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:13:51,605 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:13:51,605 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:13:51,605 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:13:51,605 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:13:51,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:13:51,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:13:51,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:13:51,606 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:13:51,633 INFO L134 CoverageAnalysis]: Checked inductivity of 2117 backedges. 0 proven. 1276 refuted. 0 times theorem prover too weak. 841 trivial. 0 not checked. [2020-10-27 20:13:51,634 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [755884526] [2020-10-27 20:13:51,635 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:13:51,636 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-27 20:13:51,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234913443] [2020-10-27 20:13:51,636 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-27 20:13:51,636 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:13:51,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-27 20:13:51,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=502, Invalid=688, Unknown=0, NotChecked=0, Total=1190 [2020-10-27 20:13:51,638 INFO L87 Difference]: Start difference. First operand 162 states and 163 transitions. Second operand 35 states. [2020-10-27 20:13:52,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:13:52,118 INFO L93 Difference]: Finished difference Result 269 states and 272 transitions. [2020-10-27 20:13:52,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-27 20:13:52,120 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 161 [2020-10-27 20:13:52,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:13:52,123 INFO L225 Difference]: With dead ends: 269 [2020-10-27 20:13:52,123 INFO L226 Difference]: Without dead ends: 169 [2020-10-27 20:13:52,125 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=512, Invalid=820, Unknown=0, NotChecked=0, Total=1332 [2020-10-27 20:13:52,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2020-10-27 20:13:52,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 167. [2020-10-27 20:13:52,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-10-27 20:13:52,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 168 transitions. [2020-10-27 20:13:52,134 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 168 transitions. Word has length 161 [2020-10-27 20:13:52,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:13:52,134 INFO L481 AbstractCegarLoop]: Abstraction has 167 states and 168 transitions. [2020-10-27 20:13:52,134 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-27 20:13:52,139 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 168 transitions. [2020-10-27 20:13:52,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2020-10-27 20:13:52,140 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:13:52,140 INFO L422 BasicCegarLoop]: trace histogram [31, 30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:13:52,141 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-27 20:13:52,141 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:13:52,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:13:52,145 INFO L82 PathProgramCache]: Analyzing trace with hash -714113992, now seen corresponding path program 29 times [2020-10-27 20:13:52,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:13:52,145 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [6382232] [2020-10-27 20:13:52,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:13:52,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:13:52,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:13:53,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:13:57,195 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:13:57,196 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 176 [2020-10-27 20:13:57,196 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:13:57,196 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5022 [2020-10-27 20:13:57,196 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:13:57,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-27 20:13:57,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 73 [2020-10-27 20:13:57,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 98 [2020-10-27 20:13:57,196 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:13:57,997 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:13:57,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:13:58,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:13:58,002 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:13:58,002 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:13:58,002 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:13:58,002 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:13:58,002 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:13:58,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:13:58,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:13:58,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:13:58,003 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:13:58,024 INFO L134 CoverageAnalysis]: Checked inductivity of 2265 backedges. 0 proven. 1365 refuted. 0 times theorem prover too weak. 900 trivial. 0 not checked. [2020-10-27 20:13:58,024 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [6382232] [2020-10-27 20:13:58,025 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:13:58,025 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-27 20:13:58,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742217517] [2020-10-27 20:13:58,025 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-27 20:13:58,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:13:58,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-27 20:13:58,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=534, Invalid=726, Unknown=0, NotChecked=0, Total=1260 [2020-10-27 20:13:58,027 INFO L87 Difference]: Start difference. First operand 167 states and 168 transitions. Second operand 36 states. [2020-10-27 20:13:58,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:13:58,535 INFO L93 Difference]: Finished difference Result 277 states and 280 transitions. [2020-10-27 20:13:58,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-27 20:13:58,535 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 166 [2020-10-27 20:13:58,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:13:58,537 INFO L225 Difference]: With dead ends: 277 [2020-10-27 20:13:58,537 INFO L226 Difference]: Without dead ends: 174 [2020-10-27 20:13:58,538 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=544, Invalid=862, Unknown=0, NotChecked=0, Total=1406 [2020-10-27 20:13:58,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2020-10-27 20:13:58,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 172. [2020-10-27 20:13:58,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2020-10-27 20:13:58,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 173 transitions. [2020-10-27 20:13:58,550 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 173 transitions. Word has length 166 [2020-10-27 20:13:58,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:13:58,551 INFO L481 AbstractCegarLoop]: Abstraction has 172 states and 173 transitions. [2020-10-27 20:13:58,551 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-27 20:13:58,551 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 173 transitions. [2020-10-27 20:13:58,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2020-10-27 20:13:58,552 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:13:58,552 INFO L422 BasicCegarLoop]: trace histogram [32, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:13:58,553 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-27 20:13:58,553 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:13:58,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:13:58,553 INFO L82 PathProgramCache]: Analyzing trace with hash -241648079, now seen corresponding path program 30 times [2020-10-27 20:13:58,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:13:58,554 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1131901796] [2020-10-27 20:13:58,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:13:58,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:13:58,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:13:58,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:14:03,601 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:14:03,601 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 181 [2020-10-27 20:14:03,601 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:14:03,602 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5022 [2020-10-27 20:14:03,602 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:14:03,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-27 20:14:03,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 75 [2020-10-27 20:14:03,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 101 [2020-10-27 20:14:03,602 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:14:04,467 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:14:04,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:14:04,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:14:04,471 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:14:04,471 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:14:04,472 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:14:04,472 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:14:04,472 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:14:04,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:14:04,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:14:04,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:14:04,472 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:14:04,493 INFO L134 CoverageAnalysis]: Checked inductivity of 2418 backedges. 0 proven. 1457 refuted. 0 times theorem prover too weak. 961 trivial. 0 not checked. [2020-10-27 20:14:04,493 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1131901796] [2020-10-27 20:14:04,493 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:14:04,493 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-27 20:14:04,494 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347958753] [2020-10-27 20:14:04,494 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-27 20:14:04,494 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:14:04,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-27 20:14:04,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=567, Invalid=765, Unknown=0, NotChecked=0, Total=1332 [2020-10-27 20:14:04,495 INFO L87 Difference]: Start difference. First operand 172 states and 173 transitions. Second operand 37 states. [2020-10-27 20:14:05,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:14:05,090 INFO L93 Difference]: Finished difference Result 285 states and 288 transitions. [2020-10-27 20:14:05,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-27 20:14:05,091 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 171 [2020-10-27 20:14:05,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:14:05,092 INFO L225 Difference]: With dead ends: 285 [2020-10-27 20:14:05,092 INFO L226 Difference]: Without dead ends: 179 [2020-10-27 20:14:05,094 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=577, Invalid=905, Unknown=0, NotChecked=0, Total=1482 [2020-10-27 20:14:05,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2020-10-27 20:14:05,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 177. [2020-10-27 20:14:05,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2020-10-27 20:14:05,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 178 transitions. [2020-10-27 20:14:05,100 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 178 transitions. Word has length 171 [2020-10-27 20:14:05,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:14:05,101 INFO L481 AbstractCegarLoop]: Abstraction has 177 states and 178 transitions. [2020-10-27 20:14:05,101 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-27 20:14:05,101 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 178 transitions. [2020-10-27 20:14:05,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2020-10-27 20:14:05,102 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:14:05,102 INFO L422 BasicCegarLoop]: trace histogram [33, 32, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:14:05,102 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-27 20:14:05,102 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:14:05,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:14:05,103 INFO L82 PathProgramCache]: Analyzing trace with hash 1986315420, now seen corresponding path program 31 times [2020-10-27 20:14:05,103 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:14:05,103 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [14682951] [2020-10-27 20:14:05,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:14:05,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:14:05,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:14:07,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:14:10,146 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:14:10,146 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 186 [2020-10-27 20:14:10,146 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:14:10,146 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-27 20:14:10,146 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:14:10,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-27 20:14:10,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 77 [2020-10-27 20:14:10,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 104 [2020-10-27 20:14:10,146 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:14:11,122 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:14:11,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:14:11,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:14:11,126 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:14:11,126 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:14:11,126 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:14:11,126 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 20:14:11,127 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:14:11,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:14:11,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:14:11,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:14:11,127 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:14:11,149 INFO L134 CoverageAnalysis]: Checked inductivity of 2576 backedges. 0 proven. 1552 refuted. 0 times theorem prover too weak. 1024 trivial. 0 not checked. [2020-10-27 20:14:11,149 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [14682951] [2020-10-27 20:14:11,149 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:14:11,149 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-27 20:14:11,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836203380] [2020-10-27 20:14:11,150 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-27 20:14:11,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:14:11,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-27 20:14:11,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=601, Invalid=805, Unknown=0, NotChecked=0, Total=1406 [2020-10-27 20:14:11,151 INFO L87 Difference]: Start difference. First operand 177 states and 178 transitions. Second operand 38 states. [2020-10-27 20:14:11,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:14:11,766 INFO L93 Difference]: Finished difference Result 293 states and 296 transitions. [2020-10-27 20:14:11,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-27 20:14:11,766 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 176 [2020-10-27 20:14:11,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:14:11,768 INFO L225 Difference]: With dead ends: 293 [2020-10-27 20:14:11,769 INFO L226 Difference]: Without dead ends: 184 [2020-10-27 20:14:11,770 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=611, Invalid=949, Unknown=0, NotChecked=0, Total=1560 [2020-10-27 20:14:11,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2020-10-27 20:14:11,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 182. [2020-10-27 20:14:11,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2020-10-27 20:14:11,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 183 transitions. [2020-10-27 20:14:11,776 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 183 transitions. Word has length 176 [2020-10-27 20:14:11,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:14:11,776 INFO L481 AbstractCegarLoop]: Abstraction has 182 states and 183 transitions. [2020-10-27 20:14:11,776 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-27 20:14:11,777 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 183 transitions. [2020-10-27 20:14:11,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2020-10-27 20:14:11,778 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:14:11,778 INFO L422 BasicCegarLoop]: trace histogram [34, 33, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:14:11,778 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-27 20:14:11,778 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:14:11,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:14:11,778 INFO L82 PathProgramCache]: Analyzing trace with hash 1165602253, now seen corresponding path program 32 times [2020-10-27 20:14:11,779 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:14:11,779 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1045449164] [2020-10-27 20:14:11,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:14:11,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:14:11,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:14:14,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:14:16,854 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:14:16,855 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 191 [2020-10-27 20:14:16,855 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:14:16,855 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5050 [2020-10-27 20:14:16,855 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:14:16,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-27 20:14:16,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 79 [2020-10-27 20:14:16,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 107 [2020-10-27 20:14:16,855 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:14:17,854 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:14:17,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:14:17,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:14:17,859 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:14:17,859 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:14:17,859 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:14:17,859 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:14:17,859 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:14:17,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:14:17,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:14:17,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:14:17,860 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:14:17,884 INFO L134 CoverageAnalysis]: Checked inductivity of 2739 backedges. 0 proven. 1650 refuted. 0 times theorem prover too weak. 1089 trivial. 0 not checked. [2020-10-27 20:14:17,884 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1045449164] [2020-10-27 20:14:17,884 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:14:17,884 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-27 20:14:17,884 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932515381] [2020-10-27 20:14:17,885 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-27 20:14:17,885 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:14:17,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-27 20:14:17,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=636, Invalid=846, Unknown=0, NotChecked=0, Total=1482 [2020-10-27 20:14:17,886 INFO L87 Difference]: Start difference. First operand 182 states and 183 transitions. Second operand 39 states. [2020-10-27 20:14:18,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:14:18,520 INFO L93 Difference]: Finished difference Result 301 states and 304 transitions. [2020-10-27 20:14:18,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-27 20:14:18,520 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 181 [2020-10-27 20:14:18,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:14:18,522 INFO L225 Difference]: With dead ends: 301 [2020-10-27 20:14:18,522 INFO L226 Difference]: Without dead ends: 189 [2020-10-27 20:14:18,523 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=646, Invalid=994, Unknown=0, NotChecked=0, Total=1640 [2020-10-27 20:14:18,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2020-10-27 20:14:18,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 187. [2020-10-27 20:14:18,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2020-10-27 20:14:18,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 188 transitions. [2020-10-27 20:14:18,530 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 188 transitions. Word has length 181 [2020-10-27 20:14:18,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:14:18,530 INFO L481 AbstractCegarLoop]: Abstraction has 187 states and 188 transitions. [2020-10-27 20:14:18,530 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-27 20:14:18,530 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 188 transitions. [2020-10-27 20:14:18,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2020-10-27 20:14:18,531 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:14:18,532 INFO L422 BasicCegarLoop]: trace histogram [35, 34, 34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:14:18,532 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-27 20:14:18,532 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:14:18,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:14:18,532 INFO L82 PathProgramCache]: Analyzing trace with hash 1981295872, now seen corresponding path program 33 times [2020-10-27 20:14:18,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:14:18,533 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [554318635] [2020-10-27 20:14:18,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:14:18,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:14:18,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:14:18,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:14:23,613 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:14:23,613 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 196 [2020-10-27 20:14:23,614 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:14:23,614 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5052 [2020-10-27 20:14:23,614 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:14:23,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-27 20:14:23,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 81 [2020-10-27 20:14:23,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 110 [2020-10-27 20:14:23,614 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:14:24,618 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:14:24,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:14:24,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:14:24,623 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:14:24,623 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:14:24,623 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:14:24,623 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:14:24,623 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:14:24,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:14:24,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:14:24,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:14:24,623 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:14:24,647 INFO L134 CoverageAnalysis]: Checked inductivity of 2907 backedges. 0 proven. 1751 refuted. 0 times theorem prover too weak. 1156 trivial. 0 not checked. [2020-10-27 20:14:24,647 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [554318635] [2020-10-27 20:14:24,647 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:14:24,647 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-27 20:14:24,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217436181] [2020-10-27 20:14:24,648 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-27 20:14:24,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:14:24,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-27 20:14:24,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=672, Invalid=888, Unknown=0, NotChecked=0, Total=1560 [2020-10-27 20:14:24,649 INFO L87 Difference]: Start difference. First operand 187 states and 188 transitions. Second operand 40 states. [2020-10-27 20:14:25,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:14:25,204 INFO L93 Difference]: Finished difference Result 309 states and 312 transitions. [2020-10-27 20:14:25,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-27 20:14:25,204 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 186 [2020-10-27 20:14:25,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:14:25,206 INFO L225 Difference]: With dead ends: 309 [2020-10-27 20:14:25,206 INFO L226 Difference]: Without dead ends: 194 [2020-10-27 20:14:25,207 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=682, Invalid=1040, Unknown=0, NotChecked=0, Total=1722 [2020-10-27 20:14:25,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2020-10-27 20:14:25,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 192. [2020-10-27 20:14:25,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2020-10-27 20:14:25,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 193 transitions. [2020-10-27 20:14:25,215 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 193 transitions. Word has length 186 [2020-10-27 20:14:25,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:14:25,215 INFO L481 AbstractCegarLoop]: Abstraction has 192 states and 193 transitions. [2020-10-27 20:14:25,215 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-27 20:14:25,215 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 193 transitions. [2020-10-27 20:14:25,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2020-10-27 20:14:25,216 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:14:25,217 INFO L422 BasicCegarLoop]: trace histogram [36, 35, 35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:14:25,217 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-27 20:14:25,217 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:14:25,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:14:25,217 INFO L82 PathProgramCache]: Analyzing trace with hash -1107862167, now seen corresponding path program 34 times [2020-10-27 20:14:25,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:14:25,218 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [203025733] [2020-10-27 20:14:25,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:14:25,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:14:25,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:14:27,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:14:30,268 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:14:30,268 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 201 [2020-10-27 20:14:30,268 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:14:30,268 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5020 [2020-10-27 20:14:30,268 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:14:30,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-27 20:14:30,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 83 [2020-10-27 20:14:30,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 113 [2020-10-27 20:14:30,268 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:14:31,354 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:14:31,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:14:31,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:14:31,359 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:14:31,359 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:14:31,359 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:14:31,359 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:14:31,359 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:14:31,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:14:31,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:14:31,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:14:31,360 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:14:31,386 INFO L134 CoverageAnalysis]: Checked inductivity of 3080 backedges. 0 proven. 1855 refuted. 0 times theorem prover too weak. 1225 trivial. 0 not checked. [2020-10-27 20:14:31,386 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [203025733] [2020-10-27 20:14:31,386 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:14:31,386 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-27 20:14:31,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843910789] [2020-10-27 20:14:31,387 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-27 20:14:31,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:14:31,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-27 20:14:31,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=709, Invalid=931, Unknown=0, NotChecked=0, Total=1640 [2020-10-27 20:14:31,388 INFO L87 Difference]: Start difference. First operand 192 states and 193 transitions. Second operand 41 states. [2020-10-27 20:14:31,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:14:31,995 INFO L93 Difference]: Finished difference Result 317 states and 320 transitions. [2020-10-27 20:14:31,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-27 20:14:31,996 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 191 [2020-10-27 20:14:31,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:14:31,997 INFO L225 Difference]: With dead ends: 317 [2020-10-27 20:14:31,997 INFO L226 Difference]: Without dead ends: 199 [2020-10-27 20:14:31,999 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=719, Invalid=1087, Unknown=0, NotChecked=0, Total=1806 [2020-10-27 20:14:31,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2020-10-27 20:14:32,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 197. [2020-10-27 20:14:32,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 197 states. [2020-10-27 20:14:32,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 198 transitions. [2020-10-27 20:14:32,006 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 198 transitions. Word has length 191 [2020-10-27 20:14:32,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:14:32,006 INFO L481 AbstractCegarLoop]: Abstraction has 197 states and 198 transitions. [2020-10-27 20:14:32,006 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-27 20:14:32,006 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 198 transitions. [2020-10-27 20:14:32,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2020-10-27 20:14:32,008 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:14:32,008 INFO L422 BasicCegarLoop]: trace histogram [37, 36, 36, 36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:14:32,008 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-27 20:14:32,008 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:14:32,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:14:32,009 INFO L82 PathProgramCache]: Analyzing trace with hash -1011616412, now seen corresponding path program 35 times [2020-10-27 20:14:32,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:14:32,009 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2005016786] [2020-10-27 20:14:32,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:14:32,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:14:32,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:14:34,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:14:37,081 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:14:37,081 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 206 [2020-10-27 20:14:37,081 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:14:37,081 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5043 [2020-10-27 20:14:37,082 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:14:37,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-10-27 20:14:37,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 85 [2020-10-27 20:14:37,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 116 [2020-10-27 20:14:37,082 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:14:38,259 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:14:38,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:14:38,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:14:38,264 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:14:38,264 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:14:38,264 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:14:38,264 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:14:38,264 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:14:38,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:14:38,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:14:38,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:14:38,265 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:14:38,304 INFO L134 CoverageAnalysis]: Checked inductivity of 3258 backedges. 0 proven. 1962 refuted. 0 times theorem prover too weak. 1296 trivial. 0 not checked. [2020-10-27 20:14:38,305 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2005016786] [2020-10-27 20:14:38,305 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:14:38,305 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-10-27 20:14:38,305 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551331871] [2020-10-27 20:14:38,305 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-10-27 20:14:38,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:14:38,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-10-27 20:14:38,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=747, Invalid=975, Unknown=0, NotChecked=0, Total=1722 [2020-10-27 20:14:38,307 INFO L87 Difference]: Start difference. First operand 197 states and 198 transitions. Second operand 42 states. [2020-10-27 20:14:38,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:14:38,960 INFO L93 Difference]: Finished difference Result 325 states and 328 transitions. [2020-10-27 20:14:38,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-27 20:14:38,960 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 196 [2020-10-27 20:14:38,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:14:38,962 INFO L225 Difference]: With dead ends: 325 [2020-10-27 20:14:38,962 INFO L226 Difference]: Without dead ends: 204 [2020-10-27 20:14:38,964 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=757, Invalid=1135, Unknown=0, NotChecked=0, Total=1892 [2020-10-27 20:14:38,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2020-10-27 20:14:38,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 202. [2020-10-27 20:14:38,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 202 states. [2020-10-27 20:14:38,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 203 transitions. [2020-10-27 20:14:38,971 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 203 transitions. Word has length 196 [2020-10-27 20:14:38,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:14:38,972 INFO L481 AbstractCegarLoop]: Abstraction has 202 states and 203 transitions. [2020-10-27 20:14:38,972 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-10-27 20:14:38,972 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 203 transitions. [2020-10-27 20:14:38,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2020-10-27 20:14:38,973 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:14:38,973 INFO L422 BasicCegarLoop]: trace histogram [38, 37, 37, 37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:14:38,974 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-27 20:14:38,974 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:14:38,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:14:38,974 INFO L82 PathProgramCache]: Analyzing trace with hash 1135054085, now seen corresponding path program 36 times [2020-10-27 20:14:38,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:14:38,975 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [944180504] [2020-10-27 20:14:38,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:14:39,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:14:39,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:14:42,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:14:44,029 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:14:44,030 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 211 [2020-10-27 20:14:44,030 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:14:44,030 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5022 [2020-10-27 20:14:44,030 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:14:44,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 41 [2020-10-27 20:14:44,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 87 [2020-10-27 20:14:44,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 119 [2020-10-27 20:14:44,030 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:14:45,261 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:14:45,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:14:45,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:14:45,266 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:14:45,266 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:14:45,266 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:14:45,266 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:14:45,266 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:14:45,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:14:45,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:14:45,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:14:45,266 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:14:45,294 INFO L134 CoverageAnalysis]: Checked inductivity of 3441 backedges. 0 proven. 2072 refuted. 0 times theorem prover too weak. 1369 trivial. 0 not checked. [2020-10-27 20:14:45,294 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [944180504] [2020-10-27 20:14:45,294 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:14:45,294 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-10-27 20:14:45,294 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665909790] [2020-10-27 20:14:45,295 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-10-27 20:14:45,295 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:14:45,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-10-27 20:14:45,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=786, Invalid=1020, Unknown=0, NotChecked=0, Total=1806 [2020-10-27 20:14:45,296 INFO L87 Difference]: Start difference. First operand 202 states and 203 transitions. Second operand 43 states. [2020-10-27 20:14:45,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:14:45,911 INFO L93 Difference]: Finished difference Result 333 states and 336 transitions. [2020-10-27 20:14:45,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-27 20:14:45,912 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 201 [2020-10-27 20:14:45,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:14:45,914 INFO L225 Difference]: With dead ends: 333 [2020-10-27 20:14:45,914 INFO L226 Difference]: Without dead ends: 209 [2020-10-27 20:14:45,915 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=796, Invalid=1184, Unknown=0, NotChecked=0, Total=1980 [2020-10-27 20:14:45,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2020-10-27 20:14:45,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 207. [2020-10-27 20:14:45,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 207 states. [2020-10-27 20:14:45,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 208 transitions. [2020-10-27 20:14:45,922 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 208 transitions. Word has length 201 [2020-10-27 20:14:45,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:14:45,922 INFO L481 AbstractCegarLoop]: Abstraction has 207 states and 208 transitions. [2020-10-27 20:14:45,922 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-10-27 20:14:45,922 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 208 transitions. [2020-10-27 20:14:45,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2020-10-27 20:14:45,923 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:14:45,924 INFO L422 BasicCegarLoop]: trace histogram [39, 38, 38, 38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:14:45,924 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-27 20:14:45,924 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:14:45,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:14:45,924 INFO L82 PathProgramCache]: Analyzing trace with hash 400711112, now seen corresponding path program 37 times [2020-10-27 20:14:45,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:14:45,925 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1430486536] [2020-10-27 20:14:45,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:14:45,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:14:45,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:14:49,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:14:50,981 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:14:50,981 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 216 [2020-10-27 20:14:50,981 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:14:50,981 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5032 [2020-10-27 20:14:50,981 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:14:50,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 42 [2020-10-27 20:14:50,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 89 [2020-10-27 20:14:50,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 122 [2020-10-27 20:14:50,982 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:14:52,299 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:14:52,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:14:52,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:14:52,304 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:14:52,304 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:14:52,304 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:14:52,304 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 20:14:52,304 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:14:52,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:14:52,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:14:52,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:14:52,304 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:14:52,333 INFO L134 CoverageAnalysis]: Checked inductivity of 3629 backedges. 0 proven. 2185 refuted. 0 times theorem prover too weak. 1444 trivial. 0 not checked. [2020-10-27 20:14:52,334 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1430486536] [2020-10-27 20:14:52,334 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:14:52,334 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-10-27 20:14:52,334 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749765945] [2020-10-27 20:14:52,335 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-10-27 20:14:52,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:14:52,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-10-27 20:14:52,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=826, Invalid=1066, Unknown=0, NotChecked=0, Total=1892 [2020-10-27 20:14:52,336 INFO L87 Difference]: Start difference. First operand 207 states and 208 transitions. Second operand 44 states. [2020-10-27 20:14:53,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:14:53,040 INFO L93 Difference]: Finished difference Result 341 states and 344 transitions. [2020-10-27 20:14:53,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-27 20:14:53,041 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 206 [2020-10-27 20:14:53,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:14:53,043 INFO L225 Difference]: With dead ends: 341 [2020-10-27 20:14:53,043 INFO L226 Difference]: Without dead ends: 214 [2020-10-27 20:14:53,045 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=836, Invalid=1234, Unknown=0, NotChecked=0, Total=2070 [2020-10-27 20:14:53,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2020-10-27 20:14:53,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 212. [2020-10-27 20:14:53,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 212 states. [2020-10-27 20:14:53,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 213 transitions. [2020-10-27 20:14:53,052 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 213 transitions. Word has length 206 [2020-10-27 20:14:53,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:14:53,053 INFO L481 AbstractCegarLoop]: Abstraction has 212 states and 213 transitions. [2020-10-27 20:14:53,053 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-10-27 20:14:53,053 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 213 transitions. [2020-10-27 20:14:53,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2020-10-27 20:14:53,054 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:14:53,054 INFO L422 BasicCegarLoop]: trace histogram [40, 39, 39, 39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:14:53,054 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-27 20:14:53,055 INFO L429 AbstractCegarLoop]: === Iteration 41 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:14:53,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:14:53,055 INFO L82 PathProgramCache]: Analyzing trace with hash 60816545, now seen corresponding path program 38 times [2020-10-27 20:14:53,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:14:53,055 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [648825770] [2020-10-27 20:14:53,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:14:53,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:14:53,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:14:57,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:14:58,127 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:14:58,127 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 221 [2020-10-27 20:14:58,127 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:14:58,127 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5036 [2020-10-27 20:14:58,127 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:14:58,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 43 [2020-10-27 20:14:58,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 91 [2020-10-27 20:14:58,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 125 [2020-10-27 20:14:58,128 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:14:59,403 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:14:59,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:14:59,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:14:59,409 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:14:59,409 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:14:59,409 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:14:59,409 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:14:59,409 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:14:59,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:14:59,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:14:59,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:14:59,410 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:14:59,444 INFO L134 CoverageAnalysis]: Checked inductivity of 3822 backedges. 0 proven. 2301 refuted. 0 times theorem prover too weak. 1521 trivial. 0 not checked. [2020-10-27 20:14:59,444 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [648825770] [2020-10-27 20:14:59,445 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:14:59,445 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2020-10-27 20:14:59,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17599349] [2020-10-27 20:14:59,445 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-10-27 20:14:59,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:14:59,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-10-27 20:14:59,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=867, Invalid=1113, Unknown=0, NotChecked=0, Total=1980 [2020-10-27 20:14:59,447 INFO L87 Difference]: Start difference. First operand 212 states and 213 transitions. Second operand 45 states. [2020-10-27 20:15:00,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:15:00,186 INFO L93 Difference]: Finished difference Result 349 states and 352 transitions. [2020-10-27 20:15:00,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-27 20:15:00,187 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 211 [2020-10-27 20:15:00,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:15:00,189 INFO L225 Difference]: With dead ends: 349 [2020-10-27 20:15:00,189 INFO L226 Difference]: Without dead ends: 219 [2020-10-27 20:15:00,191 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=877, Invalid=1285, Unknown=0, NotChecked=0, Total=2162 [2020-10-27 20:15:00,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2020-10-27 20:15:00,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 217. [2020-10-27 20:15:00,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 217 states. [2020-10-27 20:15:00,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 218 transitions. [2020-10-27 20:15:00,199 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 218 transitions. Word has length 211 [2020-10-27 20:15:00,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:15:00,199 INFO L481 AbstractCegarLoop]: Abstraction has 217 states and 218 transitions. [2020-10-27 20:15:00,199 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-10-27 20:15:00,199 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 218 transitions. [2020-10-27 20:15:00,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2020-10-27 20:15:00,201 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:15:00,201 INFO L422 BasicCegarLoop]: trace histogram [41, 40, 40, 40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:15:00,201 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-27 20:15:00,201 INFO L429 AbstractCegarLoop]: === Iteration 42 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:15:00,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:15:00,202 INFO L82 PathProgramCache]: Analyzing trace with hash -657611220, now seen corresponding path program 39 times [2020-10-27 20:15:00,202 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:15:00,202 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1610366623] [2020-10-27 20:15:00,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:15:00,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:15:00,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:15:04,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:15:05,271 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:15:05,271 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 226 [2020-10-27 20:15:05,271 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:15:05,271 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5034 [2020-10-27 20:15:05,271 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:15:05,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 44 [2020-10-27 20:15:05,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 93 [2020-10-27 20:15:05,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 128 [2020-10-27 20:15:05,272 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:15:06,682 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:15:06,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:15:06,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:15:06,686 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:15:06,687 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:15:06,687 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:15:06,687 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:15:06,687 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:15:06,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:15:06,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:15:06,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:15:06,687 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:15:06,723 INFO L134 CoverageAnalysis]: Checked inductivity of 4020 backedges. 0 proven. 2420 refuted. 0 times theorem prover too weak. 1600 trivial. 0 not checked. [2020-10-27 20:15:06,723 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1610366623] [2020-10-27 20:15:06,723 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:15:06,723 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2020-10-27 20:15:06,723 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515408648] [2020-10-27 20:15:06,724 INFO L461 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-10-27 20:15:06,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:15:06,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-10-27 20:15:06,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=909, Invalid=1161, Unknown=0, NotChecked=0, Total=2070 [2020-10-27 20:15:06,725 INFO L87 Difference]: Start difference. First operand 217 states and 218 transitions. Second operand 46 states. [2020-10-27 20:15:07,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:15:07,456 INFO L93 Difference]: Finished difference Result 357 states and 360 transitions. [2020-10-27 20:15:07,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-27 20:15:07,456 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 216 [2020-10-27 20:15:07,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:15:07,458 INFO L225 Difference]: With dead ends: 357 [2020-10-27 20:15:07,458 INFO L226 Difference]: Without dead ends: 224 [2020-10-27 20:15:07,459 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=919, Invalid=1337, Unknown=0, NotChecked=0, Total=2256 [2020-10-27 20:15:07,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2020-10-27 20:15:07,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 222. [2020-10-27 20:15:07,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 222 states. [2020-10-27 20:15:07,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 223 transitions. [2020-10-27 20:15:07,467 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 223 transitions. Word has length 216 [2020-10-27 20:15:07,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:15:07,467 INFO L481 AbstractCegarLoop]: Abstraction has 222 states and 223 transitions. [2020-10-27 20:15:07,467 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-10-27 20:15:07,467 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 223 transitions. [2020-10-27 20:15:07,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2020-10-27 20:15:07,468 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:15:07,469 INFO L422 BasicCegarLoop]: trace histogram [42, 41, 41, 41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:15:07,469 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-27 20:15:07,469 INFO L429 AbstractCegarLoop]: === Iteration 43 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:15:07,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:15:07,469 INFO L82 PathProgramCache]: Analyzing trace with hash -1955173315, now seen corresponding path program 40 times [2020-10-27 20:15:07,470 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:15:07,470 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1684776599] [2020-10-27 20:15:07,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:15:07,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:15:07,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:15:07,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:15:12,507 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:15:12,507 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 231 [2020-10-27 20:15:12,507 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:15:12,507 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-27 20:15:12,507 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:15:12,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 45 [2020-10-27 20:15:12,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 95 [2020-10-27 20:15:12,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 131 [2020-10-27 20:15:12,508 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:15:13,991 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:15:13,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:15:13,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:15:13,995 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:15:13,996 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:15:13,996 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:15:13,996 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:15:13,996 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:15:13,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:15:13,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:15:13,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:15:13,996 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:15:14,030 INFO L134 CoverageAnalysis]: Checked inductivity of 4223 backedges. 0 proven. 2542 refuted. 0 times theorem prover too weak. 1681 trivial. 0 not checked. [2020-10-27 20:15:14,030 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1684776599] [2020-10-27 20:15:14,030 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:15:14,030 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2020-10-27 20:15:14,031 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20210244] [2020-10-27 20:15:14,031 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-10-27 20:15:14,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:15:14,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-10-27 20:15:14,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=952, Invalid=1210, Unknown=0, NotChecked=0, Total=2162 [2020-10-27 20:15:14,032 INFO L87 Difference]: Start difference. First operand 222 states and 223 transitions. Second operand 47 states. [2020-10-27 20:15:14,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:15:14,759 INFO L93 Difference]: Finished difference Result 365 states and 368 transitions. [2020-10-27 20:15:14,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-27 20:15:14,760 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 221 [2020-10-27 20:15:14,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:15:14,762 INFO L225 Difference]: With dead ends: 365 [2020-10-27 20:15:14,762 INFO L226 Difference]: Without dead ends: 229 [2020-10-27 20:15:14,764 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=962, Invalid=1390, Unknown=0, NotChecked=0, Total=2352 [2020-10-27 20:15:14,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2020-10-27 20:15:14,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 227. [2020-10-27 20:15:14,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 227 states. [2020-10-27 20:15:14,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 228 transitions. [2020-10-27 20:15:14,774 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 228 transitions. Word has length 221 [2020-10-27 20:15:14,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:15:14,778 INFO L481 AbstractCegarLoop]: Abstraction has 227 states and 228 transitions. [2020-10-27 20:15:14,778 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-10-27 20:15:14,778 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 228 transitions. [2020-10-27 20:15:14,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2020-10-27 20:15:14,779 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:15:14,779 INFO L422 BasicCegarLoop]: trace histogram [43, 42, 42, 42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:15:14,780 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-27 20:15:14,780 INFO L429 AbstractCegarLoop]: === Iteration 44 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:15:14,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:15:14,782 INFO L82 PathProgramCache]: Analyzing trace with hash -31453552, now seen corresponding path program 41 times [2020-10-27 20:15:14,782 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:15:14,782 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [163638003] [2020-10-27 20:15:14,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:15:14,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:15:14,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:15:19,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:15:19,833 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:15:19,834 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 236 [2020-10-27 20:15:19,834 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:15:19,834 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-10-27 20:15:19,834 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:15:19,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 46 [2020-10-27 20:15:19,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 97 [2020-10-27 20:15:19,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 134 [2020-10-27 20:15:19,834 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:15:21,367 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:15:21,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:15:21,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:15:21,372 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:15:21,372 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:15:21,372 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:15:21,372 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 20:15:21,372 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:15:21,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:15:21,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:15:21,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:15:21,372 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:15:21,405 INFO L134 CoverageAnalysis]: Checked inductivity of 4431 backedges. 0 proven. 2667 refuted. 0 times theorem prover too weak. 1764 trivial. 0 not checked. [2020-10-27 20:15:21,405 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [163638003] [2020-10-27 20:15:21,405 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:15:21,406 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2020-10-27 20:15:21,406 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017797266] [2020-10-27 20:15:21,406 INFO L461 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-10-27 20:15:21,406 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:15:21,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-10-27 20:15:21,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=996, Invalid=1260, Unknown=0, NotChecked=0, Total=2256 [2020-10-27 20:15:21,407 INFO L87 Difference]: Start difference. First operand 227 states and 228 transitions. Second operand 48 states. [2020-10-27 20:15:22,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:15:22,092 INFO L93 Difference]: Finished difference Result 373 states and 376 transitions. [2020-10-27 20:15:22,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-10-27 20:15:22,092 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 226 [2020-10-27 20:15:22,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:15:22,094 INFO L225 Difference]: With dead ends: 373 [2020-10-27 20:15:22,094 INFO L226 Difference]: Without dead ends: 234 [2020-10-27 20:15:22,095 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1006, Invalid=1444, Unknown=0, NotChecked=0, Total=2450 [2020-10-27 20:15:22,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2020-10-27 20:15:22,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 232. [2020-10-27 20:15:22,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 232 states. [2020-10-27 20:15:22,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 233 transitions. [2020-10-27 20:15:22,101 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 233 transitions. Word has length 226 [2020-10-27 20:15:22,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:15:22,102 INFO L481 AbstractCegarLoop]: Abstraction has 232 states and 233 transitions. [2020-10-27 20:15:22,102 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-10-27 20:15:22,102 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 233 transitions. [2020-10-27 20:15:22,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2020-10-27 20:15:22,103 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:15:22,104 INFO L422 BasicCegarLoop]: trace histogram [44, 43, 43, 43, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:15:22,104 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-27 20:15:22,104 INFO L429 AbstractCegarLoop]: === Iteration 45 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:15:22,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:15:22,105 INFO L82 PathProgramCache]: Analyzing trace with hash -448750631, now seen corresponding path program 42 times [2020-10-27 20:15:22,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:15:22,105 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [824230393] [2020-10-27 20:15:22,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:15:22,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:15:22,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:15:27,211 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:15:27,211 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 241 [2020-10-27 20:15:27,211 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:15:27,211 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5069 [2020-10-27 20:15:27,211 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:15:27,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 45 [2020-10-27 20:15:27,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:15:27,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 88 [2020-10-27 20:15:27,212 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:15:28,695 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:15:28,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:15:28,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:15:28,699 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:15:28,699 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:15:28,699 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:15:28,700 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 20:15:28,700 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:15:28,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:15:28,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:15:28,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:15:28,700 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:15:28,728 INFO L134 CoverageAnalysis]: Checked inductivity of 4644 backedges. 0 proven. 1849 refuted. 0 times theorem prover too weak. 2795 trivial. 0 not checked. [2020-10-27 20:15:28,728 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [824230393] [2020-10-27 20:15:28,729 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:15:28,729 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2020-10-27 20:15:28,729 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604786633] [2020-10-27 20:15:28,729 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-10-27 20:15:28,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:15:28,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-10-27 20:15:28,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1037, Invalid=1125, Unknown=0, NotChecked=0, Total=2162 [2020-10-27 20:15:28,731 INFO L87 Difference]: Start difference. First operand 232 states and 233 transitions. Second operand 47 states. [2020-10-27 20:15:29,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:15:29,315 INFO L93 Difference]: Finished difference Result 379 states and 382 transitions. [2020-10-27 20:15:29,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-27 20:15:29,320 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 231 [2020-10-27 20:15:29,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:15:29,324 INFO L225 Difference]: With dead ends: 379 [2020-10-27 20:15:29,324 INFO L226 Difference]: Without dead ends: 240 [2020-10-27 20:15:29,325 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 [2020-10-27 20:15:29,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2020-10-27 20:15:29,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 234. [2020-10-27 20:15:29,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 234 states. [2020-10-27 20:15:29,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 235 transitions. [2020-10-27 20:15:29,333 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 235 transitions. Word has length 231 [2020-10-27 20:15:29,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:15:29,334 INFO L481 AbstractCegarLoop]: Abstraction has 234 states and 235 transitions. [2020-10-27 20:15:29,334 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-10-27 20:15:29,334 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 235 transitions. [2020-10-27 20:15:29,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2020-10-27 20:15:29,335 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:15:29,335 INFO L422 BasicCegarLoop]: trace histogram [44, 44, 44, 43, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:15:29,335 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-27 20:15:29,336 INFO L429 AbstractCegarLoop]: === Iteration 46 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:15:29,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:15:29,336 INFO L82 PathProgramCache]: Analyzing trace with hash -1275466441, now seen corresponding path program 43 times [2020-10-27 20:15:29,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:15:29,336 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1753435633] [2020-10-27 20:15:29,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:15:29,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:15:29,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:15:29,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking...